Titanium pump is reflected in the various experiments

Titanium and titanium pump in dry chlorine, even at below 0 ℃ will react violently to generate titanium tetrachloride, and a fire hazard. Titanium and titanium alloys pump in a dry chlorine in the destruction begun, the reaction is the collapse of, then add the water can not stop the reaction. titanium pump chlorine on dry, wet behavior is not yet fully understood precinct, noted in the thermodynamic analysis, titanium pump, and chloro can exist in equilibrium at room temperature, shows the thermodynamic free energy to produce a stable compound of titanium tetrachloride in the reaction system coexist with water, further reaction, i.e. Thus, on reaction of chlorine and titanium pump can be made simple explanation: titanium chloride to titanium pump tetrachloride will be generated: the titanium tetrachloride at room temperature and is a liquid having a boiling point of 136. C, the titanium alloy casting tetrachloride is generated accompanied by exothermic reaction. If the chlorine gas in the dry state, the release of large amounts of heat to the reaction reaches a high temperature, when the temperature reaches the melting point of titanium pump, titanium pump starts to burn. Thereafter, as long as there is enough in chlorine, the reaction will be intense until the reactants consumed. However, if there is enough water in the chlorine gas, the Titanium alloy sheets tetrachloride reacts with water to produce hydrogen will be titanium, which is a non-volatile substance, and become firmly attached to the surface of a film of titanium, this reaction is extremely stable reaction, and the surface film in a wet chlorine is extremely stable. Thus Titanium has excellent corrosion resistance in wet chlorine, chlorine gas is closely related to its stability in water content.

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.