Molybdenum rhenium alloy preparation method and application
Rhenium has very excellent performance, so molybdenum added rhenium to form molybdenum rhenium alloy, its alloy electrical properties and high temperature ductility, workability can be greatly improved and strengthened, can be widely used in high temperature heating body, temperature thermocouple, electron tube cathode and other high temperature parts and so on. Molybdenum-rhenium alloy is commonly used in the manufacture of high speed rotating X-ray tube target material, long life grid plate for microwave communication, space reactor core heating tube, high temperature furnace heating element and high temperature thermocouple.
Molybdenum rhenium alloys are refractory alloys, so they are generally prepared by powder metallurgy or vacuum smelting. Both methods have advantages and disadvantages.
The molybdenum-rhenium alloy ingot prepared by vacuum melting method can control the impurity content well, especially the gas element content is reduced obviously, and the mesophase is not easy to precipitate, which is beneficial to the subsequent processing of molybdenum-rhenium alloy. However, the grain size of molybdenum-rhenium alloy ingot prepared by this method is usually coarse, and the size distribution is not uniform, which increases the difficulty of alloy.
Compared with vacuum melting method, the process of preparing molybdenum-rhenium alloy by powder metallurgy is relatively simple, low cost and relatively easy to realize industrialization. Therefore, almost all products for sale are produced by powder metallurgy method. But powder metallurgy method is not easy to control the impurity content in alloy ingot, generally sintered ingot and then through vacuum melting can control the impurity content well.
General powder metallurgy process route, first of all, molybdenum powder and rhenium powder mixed evenly, then molding or isostatic pressing, and then through pre-sintering and higher than 2000℃ high temperature sintering can be produced relative density of about 90% of molybdenum rhenium alloy.
In the field of refractory metals, molybdenum-rhenium alloys (Mo-Re) are mainly used for infrared halogen lamp filaments, chemical vapor deposition furnace heating elements, thermocouple jackets, heat shields, spacecraft thrusters and other components operating at extremely high temperatures. Recently, the conventional MO-50Re alloy (containing 52.5% Mo and 47.5% rhenium) has been found to be an ideal alternative to conventional implant materials due to its high strength, excellent toughness, ductility and biocompatibility.
We can produce and process molybdenum rhenium alloy according to customer's requirements.
