Titanium and titanium alloy pump pressure casting

Pressure casting to reduce machining precision casting, precision casting blank so close to finished product forming method of the most promising, especially as titanium and titanium alloy pump this difficult titanium pumps and expensive metal. Early in the development of titanium alloy precision casting there are people who want to use this method to produce titanium alloy pump, but because of the technical level and limited conditions, this idea can not be achieved. After titanium casting research effort of a few years, the former Soviet Union in the study of titanium alloy pump technology has solved some problems: the vacuum device is built in the press (melting in vacuum chamber and vacuum die casting room); found some possible new heat-resistant material cast member pressure casting and die casting machine; successful Titanium alloy sheet research can ensure to superheat and each batch of metal can be special melting process precise ingredients.Uniform crystal structure, can be directly processed under the procedures. This not only greatly improve the yield, reduce scrap loss, and the product quality is also greatly improved.

Titanium heat exchanger is a passing cold fluid heat transfer equipment

Titanium heat exchanger is a high quality titanium tubing by hot fluid will be part of the heat transfer to the cold fluid heat transfer equipment. With the many advantages of titanium heat exchanger industrial pure Titanium investment castings  chemical, petroleum, power, food and many other common devices in the industrial sector, plays an important role in production. In practice, the effect of heat transfer materials and process characteristics with heat exchanger has a great relationship. Material in the enrichment process, the solute or the impurity is often deposited on the surface during the heating, while the formation of the scale layer to precipitate crystals, the impact of heat; some solutes are heat-sensitive, long residence time at high temperature of perishable; some corrosive material having a Titanium castings large higher viscosity or the like. Titanium heat exchanger made ​​of high quality titanium tubing. On the physical properties of titanium tube with a light weight, superior mechanical properties, and other advantages. The big strength of titanium, titanium tensile strength of up to 180kg / mm2. Some higher strength steel alloys, but the titanium strength (tensile strength and density ratio) is more than high-quality steel. In addition, titanium alloy casting has good heat intensity, low-temperature toughness and fracture toughness. Chemical properties of the titanium exhibit good stability in a variety of industrial solutions have good corrosion resistance. Titanium is an excellent industrial refrigeration equipment accessories materials.

Corrosion resistance of titanium and titanium alloys pump than other common metals

Titanium and titanium alloy pump in the wet chlorine gas corrosion resistance than other common metals, this is because with a strong oxidizing action of chlorine, Titanium castings and titanium alloy pump can be in wet chlorine stable passive state, in order to maintain the chlorine in the titanium obtuse nature, requires a certain moisture content. Critical moisture and oxygen pressure, flow rate, temperature and other factors, but also with the shape and size of titanium and titanium precision casting equipment or machinery parts related to the degree of damage to the surface, therefore, the literature on critical water content of titanium in oxygen passivation is inconsistent is generally believed that the mass fraction of 0.01% to 0.05% titanium in oxygen as the critical water content, but the actual experience that in order to ensure the safe use of aerospace casting equipment in oxygen, and sometimes the water mass fraction of 0.6% also enough, requiring up to 1.5%. Critical water content also varies with temperature and air velocity chlorine decrease increase accordingly. Actual operating experience also shows that the surface oxide film of titanium and titanium alloy pump destroyed, requiring a higher water content in order to make re-passivation of titanium and titanium alloy pump.

Titanium alloy pump special considerations

Import and export operation rights and have the right to operate cross-border trade enterprises are not allowed to import or import agent titanium alloy pump scrap ,scrap titanium alloy pump,titanium alloy scrap ,titanium alloy pump once discovered ,is handled by the foreign trade department according to relevant regulations ,the circumstances are serious business ,cancel or suspend its right to operate import and export business.To titanium ,titanium alloy pump product catalog to include Titanium castings statutory inspection by the State Administration for Entry for the implementation of the statutory inspection of imported titanium , do not ban the import of compliant products .Enterprises for the production of titanium production license system , the quality and technical supervision departments providers nonferrous metals industry management department of the existing producers of titanium alloy sheets titanium production licenses issued . Unlicensed businesses and individuals are not allowed to production and processing of titanium and its products .

Titanium alloy development at an alarming rate

As the representative of the United States Bureau of Mines research and production facilities for titanium casting technology in-depth research, development of the melting and titanium precision casting process is suitable for titanium , which is a low-cost processing and forming of titanium alloys opened up a new path. As a method of casting forming complex shapes can be directly manufactured parts eliminates a lot of the subsequent titanium alloy pump processing steps , thus increasing material utilization and reduce manufacturing costs. According to statistics, titanium forgings material utilization is Titanium sheets generally not more than 20 %, while the common titanium alloy casting material utilization is 50% , for precision casting is as high as 70% or more , which can be seen the great potential of titanium alloy casting .

Titanium pump in wet chlorine corrosion resistance than other common metals

Titanium and titanium alloys in the wet chlorine gas corrosion resistance than other common metals, this is because with a strong oxidizing action of chlorine, titanium pumps and titanium alloys can be in wet chlorine stable passive state, in order to maintain the chlorine in the titanium obtuse nature, requires a certain moisture content. Critical moisture and oxygen pressure, flow rate, temperature and other factors, but also with the shape and size oftitanium alloy and titanium equipment or machinery parts related to the degree of damage to the surface, therefore, the literature on critical water content of titanium in oxygen passivation is inconsistent is generally believed that the mass fraction of 0.01% to 0.05% titanium alloy pump in oxygen as the critical water content, but the actual experience that in order to ensure the safe use of titanium equipment in oxygen, and sometimes the water mass fraction of 0.6% also enough, requiring up to 1.5%. Critical water content also varies with temperature and air velocity chlorine decrease increase accordingly. Actual operating experience also shows that the surface oxide film of titanium and titanium alloys destroyed, requiring a higher water content in order to make re-passivation of titanium and titanium alloys.

Titanium pump, use and performance of titanium alloy pump

Titanium pump, titanium alloy pump is a kind of strong corrosion resistant pump, suitable for alkali acid alkali acid pump, so it is called. Corrosion characteristic of the strong, the key lies in the metal titanium. The following are the titanium and titanium alloy material corrosion property, knew titanium pump, titanium alloy pump can use the occasion and effect. Titanium belongs to the precious metal, its relative low density, high strength, high strength ratio. There are in a particular environment and excellent corrosion resistance. Titanium alloy after after, can make its strength greatly increased (the most widely used is the TC4). (1) such as Titanium alloy valves and titanium alloy corrosion resistance of titanium material has a high degree of stability in the oxide solution, neutral or weak acid, HgC1: titanium and titanium alloy at 100 ℃ FeCl100 ℃, 100 ℃ (CuC 12 all concentration) are stable in all concentrations of NaCl, 60% AlCl2 and 100 ℃ in many other metals, titanium oxide, is stable at two oxygen ethanoic acid 100% Phenoxy Acetic Acid and 100%, so that the titanium and titanium alloy have been widely used in the solution. Titanium and titanium alloy has high stability for the oxidant solution containing ions, such as 100qC hypo sodium chlorate solution, oxygen water, gas (75 ℃), the sodium hydroxide solution containing hydrogen peroxide. Titanium and titanium alloy corrosion resistance in the wet chlorine gas than other commonly used metal, this is because the chlorine with strong oxidation, titanium and titanium alloy are stable passive in the wet chlorine, in order to maintain the blunt titanium in chlorine, need certain moisture content. The relevant factors of the critical water content and oxygen pressure, velocity, temperature, and the titanium equipment or parts of the shape and size as well as mechanical damage on surface of Titanium alloy sheet  therefore, is generally believed that the critical moisture content on the passivation of titanium in oxygen in the literature is inconsistent,, mass fraction is 0.01% ~ 0.05% can be used as the critical moisture content of titanium in oxygen, but the actual experience, in order to ensure the safe use of titanium equipment in oxygen, and sometimes the water content of 0.6% is not enough, need to be as high as 1.5%. The critical moisture content also increased with increase of temperature and air speed reducing chlorine increased. The actual operation experience also shows that, the oxide film on the surface of titanium and titanium alloy after the destruction, require a higher water content to make titanium and titanium alloy passivation again.