Material Introduction

Molybdenum-Rhenium

Material Introduction


Adding rhenium to pure molybdenum significantly reduces the plastic-brittle transition temperature of the molybdenum, increases the recrystallization temperature, and improves room temperature ductility and high temperature strength. Adding 5%-50% (mass fraction) Re elements to Mo can enhance toughness, resistance to oxidative brittleness and creep strength, improve welding performance, and reduce the ductile-brittle transition temperature. Compared with pure molybdenum, the application range of molybdenum-rhenium alloy is significantly wider, and the material is widely used in aerospace, nuclear energy, electronics and other industries.

 

Specifications and Performance


Material

Sheet/mm

Rods and bars/mm

Piping Material/mm

Profile

Mo-Re

Can be made as thin as 0.05, with customizable length and width

Φ3-Φ50, with customizable length and width

Φ10-Φ40, with wall thickness as thin as 0.5

Can be customized on demand

 

Material

Density at 20°C (g/cm3)

Room temperature tensile strength

Room temperature elongation (%)

900℃ thermal conductivity / (W/m·k)

900℃ thermal expansion coefficient (10-6/℃)

Mo-14Re

11

700

35%

100.2

6.05

Mo-42Re

13

1020

25%

63.7

6.3

Fabrication Process


MoRe alloy bars, pipes, and plates are prepared by means of a powder metallurgy process, after which high-purity tungsten powder and molybdenum powder are uniformly mixed. After the pressing and forming processes, the material undergoes high-temperature sintering, formation and heat treatment (such as forging/rolling), and precision machining to obtain the various products required.

 

Advantage


Adding a certain proportion of rhenium to the molybdenum effectively improves its room temperature plasticity, recrystallization temperature, high temperature strength and weldability of the material, and meets the requirements of low density, corrosion resistance and welding connection in various high temperature conditions. Molybdenum-rhenium alloys have good compatibility with the fuels and coolants commonly used in fast space reactors, and are ideal for use as high-temperature structural materials and spectral shift materials in these kinds of reactors. Molybdenum-rhenium alloys can also be made into foils, special-shaped parts and other products used in electronic tubes, semiconductors, aviation and other fields.