In alloys, the metals most associated with rhenium are tungsten and molybdenum, and rhenium improves the strength and plasticity of both, a phenomenon known as the rhenium effect. The initial recrystallization temperature of tungsten could be increased by 300℃ ~ 500℃ by adding a small amount of 3% ~ 5% rhenium, and the high-temperature strength and plasticity could also be improved.
In rhenium tungsten dissolved to form a body centered cubic solid solution strengthening, which makes tungsten-rhenium alloy have a series of excellent properties, such as high melting point, high strength, high hardness, high plasticity, high recrystallization temperature, high resistivity, low vapor pressure, low electron work function and lower ductile brittle transition temperature, etc., is one of the best comprehensive properties of alloy in tungsten alloy.
Tungsten-rhenium alloys are mainly prepared by powder metallurgy and smelting. Due to the high yield and low cost of the alloys prepared by powder metallurgy, tungsten-Rhenium alloys are mainly produced by powder metallurgy at present. The process flow of W - rhenium alloy powder metallurgy is: preparation of pre-alloy powder - pressing - sintering - pressure processing.
Rhenium tungsten alloy can be processed into boards, sheet, wire, wire, rod, used in aerospace, aviation high temperature structure (nozzle, nozzle, thermal protective screen, etc.), elastic components and electronic components and other important components, along with the rhenium tungsten alloy USES more and more widely, more and more is also high to the requirement of the performance, superfine crystal/nanocrystalline tungsten rhenium alloy development also gradually on the agenda.
