Use titanium sponge instead of stainless steel high pressure

 As another example, the SR - 71 high speed scout (flight Mach number is 3, altitude 26212 meters), titanium accounted for 93% of the plane structure weight, so-called "titanium sponge" aircraft. When aeroengine in esteem than increased from 4 to 6 to 8 ~ 10, compressor outlet temperature accordingly increased to 500 from 200 ~ 300 ° C to 600 ° C, originally made of aluminium low-pressure compressor disk and blade must use titanium alloy material, or use titanium sponge instead of stainless steel high pressure compressor disk and blade, in order to reduce the structure weight. In the 70 s, the dosage of titanium alloy in the aircraft engine generally accounts for 20% ~ 30% of total weight structure, mainly used in the manufacture of compressor parts, such as forging of titanium fan, compressor disk and blade, titanium compressor casing, intermediate Titanium casting, bearing housing, etc. Spacecraft, which make use of the specific strength of titanium alloy, corrosion resistance and low temperature resistance to manufacture all kinds of pressure vessel, fuel tank, fasteners, instrument strap, architecture and rocket shell. Artificial earth satellite, the lunar module, manned spacecraft and space shuttle USES titanium alloy plate weldments. Titanium‬ precision castings,‪#‎Titanium_castings‬ Sunrui‪ Titanium‬ precision castings,‪Titanium castings‬  www.sunrui-titanium.com

Future of titanium sponge powder

Strategic metals - titanium (Titanium): element symbol Ti, atomic number 22, atomic weight 47.88, located on the 4th cycle ⅣB family in the periodic table. Titanium is one of the most widely distributed crustal abundance of elements in high (6320 × 10-6), accounting for 0.61% by weight of the crust columns ranked 9; resources are second only to iron and titanium sponge, aluminum, magnesium and column ranks section 4, is an important raw material preparation slag, synthetic rutile, titanium dioxide, titanium sponge, titanium metal and titanium, welding rod coatings. Because titanium silvery white, with a high melting point (1727 ℃), light weight (4.5), high mechanical strength (5), low temperature (ultra low temperature resistivity is almost zero), abrasion resistance, good plasticity titanium wire (can thin-walled use), easy to oxidation, reduction and other characteristics; titanium oxide - titanium dioxide (titanium dioxide), with non-toxic, good physical and chemical stability (after 1000 ℃ calcination does not melt at any acid and alkali) , the refractive index is high (2.55 to 2.70), as well as a strong whiteness, color strength (1150 to 1650), hiding (40 ~ 50g / m2), temperature resistance, anti-chalking and other characteristics, is called "paint the king. "

Step titanium supplier screening process

Alpha alloy and usually alloy annealing temperature to beta phase transition point below ; Solid solution and aging treatment from high temperature rapid cooling, to get marten site alpha 'phase and meta stable beta phase, and then in aerospace investment castings the temperature range of the thermal insulation makes the meta stable phase decomposition, alpha or compounds, such as small dispersed second phase particles reach the purpose of the alloy strengthening. Usually alloy quenching and beta phase transition point below, metastable beta alloy quenching inbeta phase transition point above. Aging treatment temperature .Solid solution treatment and aging: the purpose is to increase its strength, alpha titanium alloy and stable beta titanium alloy cannot be strengthening Titanium castings treatment, only for annealing in the production. Alpha + beta, and contain a small amount of metastable beta of alpha titanium alloy titanium alloy can make through solid solution treatment and aging alloy further intensified.Teach candidates in this election ore, the resistance of various minerals larger difference Fortunately, you can use a string of iron ore of high conductivity characteristics, the electric field in the corona effectively exclude gangue minerals and high-grade titanium supplier concentrates . The heavier selected indicators, the re-election process can titanium ingot price only admire iron and titanium supplier augite, chief of the purpose of throwing stones and other layers. Diamond production process for the election to re-elect a spiral of weak magnetic flotation a sweeping election a dehydration grading an electrical election process. It is divided into two parts, rent selection and selection. Rougher including the screening screening, hydraulic classification, re-election, flotation, weak magnetic separation, dehydration and filtration processes; featured include drying grouping, electrostatic separation, concentrate and packaging processes.

Use titanium sponge instead of stainless steel high pressure

 As another example, the SR - 71 high speed scout (flight Mach number is 3, altitude 26212 meters), titanium accounted for 93% of the plane structure weight, so-called "titanium sponge" aircraft. When aeroengine in esteem than increased from 4 to 6 to 8 ~ 10, compressor outlet temperature accordingly increased to 500 from 200 ~ 300 ° C to 600 ° C, originally made of aluminium low-pressure compressor disk and blade must use titanium alloy material, or use titanium sponge instead of stainless steel high pressure compressor disk and blade, in order to reduce the structure weight. In the 70 s, the dosage of titanium alloy in the aircraft engine generally accounts for 20% ~ 30% of total weight structure, mainly used in the manufacture of compressor parts, such as forging of titanium fan, compressor disk and blade, titanium compressor casing, intermediate Titanium casting, bearing housing, etc. Spacecraft, which make use of the specific strength of titanium alloy, corrosion resistance and low temperature resistance to manufacture all kinds of pressure vessel, fuel tank, fasteners, instrument strap, architecture and rocket shell. Artificial earth satellite, the lunar module, manned spacecraft and space shuttle USES titanium alloy plate weldments.‪#‎Titanium_Graphite_Mold_Castings‬
www.sunrui-titanium.comTitanium Casting Golf Heads,‪#‎Titanium_Welded_Tubes‬,Titanium bicycle framesTitanium precision castings,

‪#‎Titanium_castings‬ Sunrui

#‎Aerospace_investment_castings‬,Titanium investment castings Sunrui

How to measure the melt viscosity titanium plate

How to measure the melt viscosity titanium plate 
Drums and surface tension of the melt is aerospace investment casting cast alloy melt important physical properties, they are directly related to the melting conditions, but also decided plate fluid flow and an important factor in filling of titanium. 
     Viscosity of titanium former Soviet scholars have conducted a lot of research was, and that the new structure of the melt, whereas in the binary titanium plate, with the alloy to the transition from a single-phase region multiphase region, the viscosity increases several times. When the melt viscosity was measured using a titanium crucible twist method, the graphite material of the crucible, and the crucible was measured in the elastic suspension with the gold wire twisting motion. Since the graphite crucible materials Titanium Casting Manufacturer contaminate the carbon component alloy, therefore measured viscosity values will be affected, but by comparing different carbon titanium viscosity liquid at different temperatures, and extrapolated to determine the titanium plate viscosity of the melt.‪#‎Titanium_Casting_Golf_Heads‬,Titanium Welded Tubes,Titanium bicycle frames‪#‎Titanium_Casting_Golf_Heads‬,Titanium Welded Tubes,Titanium bicycle frames‪#‎Titanium_alloy_sheets‬,Titanium alloy valve,Titanium sheets

titanium foundry Titanium tube is removed by heat treatment

Titanium tube is removed by heat treatment method other substances
When excessive hydrogen content of sunrui titanium foundry , become brittle leaving notched impact toughness and tensile strength of a sharp decline in the general provisions of the hydrogen content of titanium tubes shall not exceed 0.015% . To reduce the amount of hydrogen absorption , parts should be removed prior to heat treatment fingerprints, rolling mill mark , grease and other residue , no vapor heat treatment furnace atmosphere . If the hydrogen content of titanium tube exceeds the allowable value , must be removed by vacuum annealing . Dehydrogenase is generally vacuum annealing at 538-760 ℃, maintained under a pressure lower than 0.066Pa 2-4h.‪#‎Titanium‬ Casting Golf Heads,Titanium Welded Tubes,Titanium bicycle frames#‎Titanium_Graphite_Mold_Castings‬
    When the temperature does not exceed 540 ℃ , the titanium oxide film surface of the tube does not significantly thickened , however, the heat treatment at higher temperature (760 ℃ above ) , the oxidation rate is rapidly increased, sunrui Titanium Artificial Joint and the oxygen expansion inside material to form a diffusion layer - contaminated layers. Oxygen contamination layer has a high ratio leads to brittle parts of the surface cracks and damage. Removing contaminated layers of oxygen with mechanical processing methods ( such as room cut , sandblasted , etc. ) , or pickling, chemical milling and other chemical methods , in the heat treatment , the heating time should be guaranteed under the premise of the heat treatment is shortened as much as possible meteorite , but also in performed in a vacuum furnace or an inert gas (argon , nitrogen, etc. ) furnace . Application of appropriate Xu Min can avoid or reduce contamination titanium Titanium casting tube furnace parts heating in air generated .

Impact on performance titanium heat treatment cycle

The phase transition in titanium stress is small, with a simple heat treatment, it is difficult to change the original casting organizations, especially the grain boundary organization. 
To refine casting titanium organization, people were cycling in the heat treatment. Volume effect of the use of the accumulation phase, resulting in 
And increased stress, prompting aerospace investment castings recrystallization, resulting in multilateral and grain refinement sheet of tissue. 
     Experimental results show that the alloy has Ti6A14v thick widmanstatten, the P-phase region through a ten cyclic heat treatment (980 a 
500 ℃), enables thin sheet first roughening, and broken off, so that the structure refinement. Then a continuous grain boundary is not 
Change, and even some coarsening. titanium precision casting  If the cyclic heat treatment (980 a 500 ℃, 10 times the water-cooled ten 900 ℃, 2h air-cooled) before pre-
P first heated to a broken fire zone (1010 ℃, water quenching), become fully martensite after cycle heating and cooling, a grain boundary 
Disappeared or broken off, the degree of refinement and organizational uniformity will increase its alloys have significantly improved fatigue performance.

Amazing Secrets: Why not see F-20 rivets

                                        After an anti- aircraft J20 appear different from the past , the whole body almost see the rivets, some people said it was because the stealth coating covers the outside , titanium bicycle frame so you do not see the rivets , in fact, this is wrong. F22 is using rivets , close look carefully you can see it. Why not F22 rivets completely covered with a coating to see it? This is because the skin is F22 by a piece of riveting rivets up, rivets can not cover for easy maintenance , in case you can quickly remove the rivets skin pulls off a piece , and can determine with the naked eye whether the fuselage skin cracks.
    So J20 Why not see rivets it? In fact, this and related processing technology , due to the advances in technology, a large piece of titanium alloy ingots J20 using whole body casting , extrusion and then press through a dedicated , increased density , ( the two years prior to the successful development of the machine , once media have reported that this is the aircraft fuselage presses developed specifically for J20 ) , and finally the use of CNC machine tools hollowed out , which is a ** , high-precision CNC machine tools , Titanium Artificial Joint the entire titanium aluminum alloy castings ( diameter may up to 3 meters ) hollowed out into the shape of the aircraft fuselage , so the aircraft do not need to cover the skin, the skin of the fuselage frame and a titanium alloy ingots are then processed , so do not see J20 rivets.
    Such a process can greatly increase the strength of the aircraft , but also improve the accuracy of processing a lot , this is a revolutionary advancement process of the aircraft fuselage . Aircraft ever built up step by step , first build a titanium alloy frame , between the frame and bolted punch , then use a rivet on the skin . These processes entirely by hand , the precision is difficult to control , and if the bolt which does not clench or aging can lead to serious disintegration of the entire aircraft , light can also cause skin Titanium Golf Club Heads cracking, so planes have to be done to test the static -destructive testing whether the aircraft design strength . And because of the introduction of new processing technology J20 , the whole body is one, to achieve the best strength to do after high air maneuvers lead to the disintegration of the body will no longer appear .
    After processing J20 in the fuselage just put on the surface of the fuselage stealth patch, we note the following diagram , J20 stealth patch is pasted a block , a bit like a submarine acoustic rubber blocks. If you later off a piece of stealth patch just paste a new on OK, so the aircraft maintenance is very easy .
    J20 of the integral processing technology is currently the world's first application in aircraft , F35 will still rely on the rivet , not to mention the Russian T50 , 20 years ago, the process is completely , there is no fundamental and J20 comparable. So an advanced aircraft can not just look at the surface , J20 to strategic needs ( to carry large amounts of fuel to increase range and large anti-ship missiles ) and designed long body, such a body if the old conventional processing technology we rely the naked eye does not feel his body proportions , the body is too long , the body is weak at the middle of stress , Titanium Casting Golf Heads where the most easily broken, but after the introduction of new technology completely eliminates this drawback . So just come out when J20 foreign aircraft design experts feel incomprehensible , but once the solution to doubt its processing will become clear.

‍China laser forming of titanium alloy components than the U.S.

  Recent CCTV program " Face to Face" on the F -15 had an interview with the chief architect of Sun Cong , which disclose a lot of important information about the "Flying Shark" developed . Which CCTV reporters Cong Sun , also spoke in particular of the " next generation of aircraft should definitely have plans ." This makes the future of China 's military enthusiasts carrier aircraft and more full of expectation . But we are looking forward to the second generation of domestic aircraft carriers , while the J-15 may Titanium Welded Tubes wish to present a more objective and comprehensive understanding. Chinese aircraft carriers in the process of development, the J-15 is by no means merely a platform to meet the initial landing of aircraft , more than those who were later replaced by the short-lived "third generation fighter " , but to be in a long-term process the main role of an offense and defense .
November 2012 , CCTV reported during the first carrier-based aircraft taking off and landing aircraft , the F -15 is so introduced : a successful landing on the Liaoning number of F- 15 fighter , is China 's first self- designed and developed carrier -based multirole fighter , with completely independent intellectual property rights , it has a combat radius , mobility, payload and more features ; according to different combat missions, carry multiple anti-ship missiles, air to air missiles, ground missiles and precision-guided bombs and other precision strike weapons , with full sea , the whole airspace strike capability. The performance of the J-15 , Su-33 with Russia , the United States and other world F/A-18 main carrier-based fighter comparable active , so as the ferocious powerful air "flying shark ."
SUN Cong in the CCTV program " Face to Face" is the definition of F -15 : J-15 is the first generation to produce air -based multi-role fighter of our country, should belong to the third-generation fighter , the difference is such a difference , it China 's aviation started quite late , Titanium heat exchangers but the starting point has the advantage .
To produce a space-based multi-role fighter , the J-15 is a qualitative judgment. In "Face to Face " program commentary revealed that the F -15 F -11 fighter is based on the development of our own production , the assembly has canard , folding wings , tail hook fitted with stern features , such as carrier-based aircraft , high gear strength. As we all know , J-11 is a twin-engine heavy " air superiority " fighter , so on the basis of its research and development of the F -15, in the fight for control of the air have certain advantages. Russia's Su-33 also reflects this feature , from the indicators, the Su-33 in addition to weight ratio on behind the Rafale M, while basic and F/A-18E and Rafale M flat in other areas, and the Soviet Union - the weight ratio to more than 33 Super Hornet , so the air combat capability to more than F/A-18E.
But it is generally for the Su-33 combat performance is not good, because the Su-33 is the first empty weight too . Su-33 's empty weight reached 18.4 tons , more than the F/A-18E of 13.4 tons , is much larger than the "Rafale M" of 9.7 tons . This means that the Su-33 payload and fuel takeoff in carrying amount will be relatively limited, which limits the performance of the Su-33 in combat . Followed avionics relatively backward . Su-33 avionics basically behind the F/A-18E fighter 10-15 years. With the United States has a strong F/A-18E avionics base , which has better avionics and man-machine interface , which make up the gap with the Su-33 's flight performance alone . U.S. aircraft carrier battle group plus the warning means , the actual combat "Super Hornet" instead of pressing the Su-33 to play .
Therefore, it is very similar to the evaluation and control of the air performance of the J-15 Su-33 , but also to see whether it can solve these two major problems. The first is the weight loss. Modern fighter to lose weight, there are two ways nothing less . The first is to optimize the design , and the second is the use of new materials. Former Soviet Su-27 design fully embodies the idea of weight loss . The use of more than 60% of aircraft aluminum , due to the widespread adoption of integrated structural system layout , the overall , integrated structure and layout , structural design partial rationalization to reduce the structural weight . The Sun Cong also mentioned in the CCTV interview : " weight loss is a very complex work , if at first you load the design, the structure of this design dexterity , the efficiency of the structure is in the selection, and so on. other to achieve reduction in weight of the final series . "
Besides the extensive use of new materials has become a common method of combat aircraft to lose weight . Weight loss in the application of new materials , the use of titanium and composite materials are becoming more mainstream . F-22 titanium and composite materials using the ratio has reached 66% , while the traditional steel and aluminum is less than 20 %. From the recent media reports , China in the development of aviation titanium is very fast. China's titanium research and development, its aerospace investment castings performance level , production technology, processes and standards currently have reached the world advanced level. In the processing of titanium, January 18, 2013 2012 annual meeting of the National Science and Technology Awards Conference, Professor Wang Huaming Beijing University of Aeronautics and Astronautics presided over the " large complex plane forming an integral member titanium laser technology" First State Technological Invention Award Award. This means that China has become the country after the United States , the world's second master aircraft titanium alloy structural components rapid prototyping and laser technology . And our country is better than the United States has been able to produce laser forming titanium components, to become the world's only master laser forming titanium large main bearing components manufactured and put into practical country. China 's J- 15 if they can embody innovative design features to minimize the weight of the structure , while a large number of new applications aviation titanium and other materials on the materials, coupled with the country already have some basic composites, the empty weight of the F -15 to achieve the decrease is absolutely no problem.
Followed in the avionics field . With respect to the former Soviet Union , China 's electronics industry is rapidly catching up the world advanced level . On airborne fire control radar, China 's J-10 , J- 11 has been equipped with multi-function pulse Doppler radar , according to media reports more new F-10B fighter equipped with phased array radar. Since China on phased array radar transceiver components and VLSI technology has made great progress , so the F- 15 airborne radar in terms of fully capable and " Super Hornet" in the same grade , and can even reach gusts M level. And in the past and have been complex and cumbersome Soviet fighter cockpit flight instruments compared to China's large fleet of three generations of fighters have installed a large number of multi-function displays, and even spend a color LCD display. In the CCTV program " Face to Face" , some users have found that the J-15 cockpit simulator there are at least three multi-function display . It should be said , the F -15 cockpit whole technical level , although not comparable with the F-35, but reached the level of M Super Hornet is no problem .
So now we have to judge the performance of the J-15 , "and the Russian Su-33 , the United States and other world serving the main carrier-based F/A-18 fighter comparable " is not mere propaganda but has real technical basis . But now a lot of point of view, the F -15 flying leaps slippery way , there are inherent deficiencies , limiting the J-15 multi-purpose aspects of sea attacks on the performance of the ground . Well, J-15 can not be converted into a catapult off?
Jet aircraft carrier aircraft flying leaps off the slide to eject the world seems to be no precedent . But that does not violate the basic laws of modern aircraft design . Generally considered to catapult off part of the landing gear strengthened, while flying leaps slip you do not need ; And both need to block cable landing approach , the structure of the body and therefore must be strengthened to cope with the huge impact landing brought . It can be seen to be modified F- 15 catapult takeoff , it is necessary to titanium bicycle frames increase the weight . After some calculations , now converted catapult takeoff F -15 to strengthen the landing gear may have to gain weight 300 kg . This strict control of the empty weight of the J-15 , it is not good news . But also with a view of the F- 15 converted into the catapult can also lose weight, because the original slide flying leaps in order to improve the performance and design of low-speed flight -lift devices, such as the F -15 canard , etc. , you can catapult takeoff under way canceled. Thus , compared to calculate the modified F -15 increasing weight can be controlled at 200 kg. And in the " face to face" program, many users found that the F -15 landing gear " very thick " , so some people do have to determine the J-15 loaded catapult take-off "program ." Catapult takeoff can further increase the F -15 fully loaded takeoff weight , thereby increasing the fuel load and the F -15 weapon mount capability, which has a very large significance for the F- 15 aircraft carrier battle groups to improve their performance.
Thus, " an airplane out of a series of development is certainly , then this series to a certain extent , there will almost certainly be the next generation of aircraft arrangements ." We should SUN Cong chief architect of the program, said these words , be depth thinking. Some people may think that the development of the J-15 ejection type of equipment requires China has an aircraft carrier catapult , it is definitely not happen overnight. So at this time, why the Chinese J-15 efforts, not as a direct development of a new generation of stealth aircraft carrier .
But in fact , the Air Force and Navy air combat styles are very different . Air Force Materiel fourth generation fighter is without a doubt the king . However, naval equipment , the development of fourth-generation stealth aircraft is even more complex, and the status of three generations of heavy machine also more than we thought it would be stable 

mouth + Lu titanium

mouth + Lu titanium General population + Lu also called two-phase titanium alloys, organize its equilibrium state with a phase -based, Lu phase content is usually from 9% to 30%. Two-phase titanium alloy has good mechanical properties, strength
Above the mouth of titanium alloy can be heat strengthened , heat stress processing, and some mouth + Lu titanium ( eg TCll) heat resistance is relatively good, but the stability of such organizations titanium investment casting relatively poor population ( refer to
LU decomposition of phase ) . Low oral phase content Lu + Lu good weldability of titanium , but with the increase in the content of Lu phase welding performance gradually deteriorates.

Mouth + ∥ Titanium is the most widely used of a class of industrial titanium . If TC4, TCll journal , respectively, for the front of the engine , drive parts, leaves and other key structures before the casing material . TC4 (Ti.6AI.4V) is a typical representative of such a titanium alloy , titanium alloy products present in all 60% of Ti. 6A1.4V, and titanium consumption accounts for about 80% of the aircraft structure . The fourth -generation fighters such as the American F. Accounted for 41% titanium with the body 22 of the total weight , wherein the Ti. 6A1.4V alloy consumption accounted for 36% of total body weight [ 91. Mouth + Lu domestic titanium alloy grades for TC followed by the serial number , as the largest amount of TC4. And TCll etc.

Material preparation technology of titanium casting

In vacuum or protective atmosphere, Aerospace titanium casting for smelting, casting castingprocess. The preparation process of titanium material. Titanium in molten state is very lively, has long been unable to find suitable and other material casting method, thecast titanium behind wrought titanium alloy 20 years. From 1956 to 1962 AmericanBaer (Beal), developed by vacuum consumable arc melting technology of the Titanium Castings Solidification, officially entered the industrial production. Based on thematerial performance is equal or close to the aviation titanium foundry, the cost is reduced by about 50%, and titanium casting technology has been rapid development.Expected in the near future, it will obtain the position and deformation of titanium alloyare equally important. Casting equipment and technology, vacuum consumable arc skull furnace is the main equipment for production of titanium castings, the principle is:in the furnace body, using Titanium casting cast or forged bar as the parent material electrode (anode), water-cooled copper crucible as a positive electrode, under vacuum atmosphere, low input voltage (25 ~ 40V) and high current the poles, close to the arc, melting titanium material consumable electrode tip, drop into the crucible, the formation of molten pool. Casting equipment and technology, vacuum consumable arc skull furnace is the main equipment for production of Aerospace investment castings, the principle is:in the furnace body, using titanium material cast or forged bar as the parent material electrode (anode), water-cooled copper crucible as a positive electrode, under vacuum atmosphere, low input voltage (25 ~ 40V) and high current the poles, close to the arc, melting titanium material consumable electrode tip, drop into the crucible, the formation of molten pool. In the cooling effect, a layer of shell forming copper cruciblewall and the crucible melt pool, protection against erosion,titanium foundry without pollution. When the weld pool growth crucible to sufficient amount, the blackout faultarc, promoting rapid electrode, flip the crucible, the molten titanium water injectionmold static or centrifugal rotation in. When the weld pool growth crucible to sufficient amount, the blackout fault arc, promoting rapid electrode, flip the crucible, the moltentitanium water injection mold static or centrifugal rotation in. Advantages of solidified shell furnace, high production efficiency, good control of alloy composition.Disadvantage is the metal superheat degree low, rapid casting and equipment largergating system. Casting quantity China maximum skull furnace is 500kg. America,former Soviet Union were about 1000kg. The other is in the stage of experimental study of titanium casting method with electron beam, plasma and cold wall crucibleinduction melting and casting method.

Why study the reaction of titanium plates with steam

Tests carried out in a vacuum apparatus with a quartz microbalance in the spring . Reading accuracy is 4 × 10 - sample surface g / cm . Titanium Welded Tubes Mercury manometer measuring system connected to the reaction chamber using the pressure.
    Titanium iodide as a sample . Breaking titanium strip cold rolled to a rod 0.7 mm thick . Then cut the strip size is 9 × 25 mm sample . In order to eventually remove surface dirt , before the test sample with a finely sandpaper and etched in 7% HNO3 solution in HF.
    The tube is filled with distilled water and vacuum means connected to the plug and the device as a source of water vapor . In order to remove the dissolved water gasification will remain for some time in the water under the stars . Samples were heated to a predetermined temperature in a vacuum after the tube with water and the system is turned on, and set up the equilibrium vapor pressure corresponds to the temperature in the system . When the system is full , the system is filled with water and cut off the tube , Titanium heat exchangers and then tested in a closed volume.
    Under 800,850,900 and 950 ℃ and 14 mm Hg vapor pressure tested titanium plate and steam reaction.
    Kinetics of these tests indicate that , in the beginning stage of the reaction , the reaction with water vapor titanium plates subject to the parabolic law . After the reaction started after a certain period of time becomes linear parabolic law rule.
    In order to identify the effect of pressure on the reaction rate , once at 4 mm Hg pressure two experiments.
    Titanium plate during the reaction and steam , and any of metals, and also the reaction gas , is composed by a number of successive stages , in which the main are: 1 ) the gas molecules collide with the metal , 2 ) gas molecules adsorbed on the metal surface 3 ) the dissociation of the gas molecules , 4 ) through the surface of the film agent diffusion reaction product , 5 ) chemical reaction.
    The reaction rate depends on the speed of the pro stage . It was found that the reaction pressure is reduced because the rate of 5 /6 and steam manganese Titanium heat exchangers remains unchanged , so it should be acknowledged that the reaction speed depends on the diffusion of the reagents through the surface of the membrane , since it is the only one speed stage and the gas pressure independent.

Impact on performance titanium heat treatment cycle

The phase transition in titanium stress is small, with a simple heat treatment, it is difficult to change the original casting organizations, especially the grain boundary organization.
To refine casting titanium organization, people were cycling in the heat treatment. Volume effect of the use of the accumulation phase, resulting in
And increased stress, prompting aerospace investment castings recrystallization, resulting in multilateral and grain refinement sheet of tissue. 

     Experimental results show that the alloy has Ti6A14v thick widmanstatten, the P-phase region through a ten cyclic heat treatment (980 a
500 ℃), enables thin sheet first roughening, and broken off, so that the structure refinement. Then a continuous grain boundary is not
Change, and even some coarsening. titanium precision casting  If the cyclic heat treatment (980 a 500 ℃, 10 times the water-cooled ten 900 ℃, 2h air-cooled) before pre-
P first heated to a broken fire zone (1010 ℃, water quenching), become fully martensite after cycle heating and cooling, a grain boundary 

Disappeared or broken off, the degree of refinement and organizational uniformity will increase its alloys have significantly improved fatigue performance.

Application of aerospace titanium castings and research

Titanium valves and titanium alloy valve is the use of titanium metal materials in highly corrosive environments oxide film has good stability and self-passivation capability, this feature titanium valve to resist corrosion and strong variety of harsh conditions. Titanium valves can resist corrosion media environment, the key lies in the surface of the "blunt oxide film" chemical stability in corrosive media. Shanghai VINCI valve on the surface of titanium ion modification, anodizing and other scientific methods to ensure VINCI too valves in reducing medium corrosion resistance and surface hardness of quality assurance. Nickel and nickel titanium alloy valve Titanium alloy valve condition medium corrosion resistance targeted, high application cost, are widely used in chemical, petrochemical, metallurgical, nuclear, ocean development, power plants and other industrial fields pipelines desulfurization control system, to solve the general stainless steel and other metals, non-metallic materials corrosion problems can not be resolved titanium pumps to ensure the pipeline control titanium alloy valve in extremely harsh corrosive medium and long-term safe, reliable and stable operation. Shanghai VINCI valve production of nickel and nickel titanium alloy valve are: pure nickel valves, nickel-chromium alloy valves, nickel-copper alloy valves, nickel-molybdenum alloy valves, nickel-chromium-molybdenum alloy valves.

Titanium Graphite Mold Casting, titanium heating coil

Diffusion bonding of titanium alloy sheets and stainless steel net by solid-phase weldingtechnology diffusion. Solid phase diffusion welding is lower than the melting temperature of the substrate, through a certain pressure, so that the surface materialcontact with each other to produce local plastic deformation and achieve close contact, and the surface diffusion of atoms and bond to form metallurgical bonding process. Macroscopic deformation, this titanium sheets method will not cause parts of melting orrelative motion. Between the mating surfaces with or without diffusion auxiliary materials (i.e., the intermediate layer material). Diffusion welding process can be divided into three stages: the first stage is the physical contact stage; second stage is the contact diffusion bonding, bonding layer firmly; third stage is in the binding layergradually to the size direction contact portion is formed, forming a diffusion reliablewelding of titanium alloy sheets and stainless steel net, welded joints in considering the compatibility, welding materials and propellant, combined with the ease of titanium alloy sheets and stainless steel net of actual welding, should try to avoid using diffusionauxiliary materials, namely the direct diffusion of titanium alloy sheets and stainless steel mesh welding technology.

​titanium foundry Advantages and disadvantages of titanium

Advantages and disadvantages of titanium porcelain teeth and price 
In a wide variety of porcelain titanium foundry teeth, the total is divided into these categories: ordinary porcelain teeth, porcelain teeth titanium, titanium alloy porcelain teeth, all-ceramic porcelain teeth and so on. Which titanium porcelain teeth in between cheap 
Between the metal and precious porcelain teeth porcelain teeth, outstanding cost performance, so get the favor of consumers. 
Advantages titanium porcelain teeth that it reduces the metal damage to the human body, similar to the color of the gum tissue does not produce black ash edge (which is a disadvantage ordinary porcelain teeth). 
Titanium dental standards must meet the criteria to only 6%, but now the market titanium porcelain teeth containing titanium is very low, so titanium ingot price there is not much between the area according to the ordinary porcelain teeth 
Do not. Overall still occupy the interests of all. Because a common charging 400 yuan porcelain teeth dental clinics in Beijing, and a titanium porcelain teeth price is 900 yuan, so the benefits 
Makes titanium porcelain teeth facing an embarrassing situation.