Material Introduction

Molybdenum and tungsten belong to the same group of elements, both have a body-centered cubic structure, and their atomic radius and lattice constant are close to each other, enabling them to form a continuous solid solution. Adding tungsten to molybdenum improves its high-temperature characteristics and corrosion resistance, while also increasing recrystallization temperature and high-temperature performance, and obtains an alloy material that combines the advantages and properties of both molybdenum and tungsten. Molybdenum tungsten alloys can be used in high-temperature equipment, aerospace, sputtering targets and other fields. Typical grades are Mo-30W and Mo-50W.

Mo-30W is mainly used in the manufacture of stirring tools in the zinc and glass industries. Mo-50W is mainly used as a sputtering target for the manufacture of flat display screens.

MoW alloy rods and plates are prepared by a powder metallurgy process, during which high-purity tungsten powder and molybdenum powder are uniformly mixed. After pressing and forming, the materials undergo high-temperature sintering, deformation, heat treatment (including forging/rolling) and precision machining, to obtain the different products required.

Powder mixing → pressing / forming → high-temperature sintering → forging/rolling deformation → heat treatment → machining

Molybdenum and tungsten can form a continuous solid solution at all temperatures and compositions, which provides the advantages of both molybdenum and tungsten. The powder metallurgy process is used to prepare the billet, while after deformation processing, a material with a higher recrystallization temperature and high-temperature strength than pure molybdenum can be obtained without significantly increasing the density. In some high temperature applications, this material is able to replace pure molybdenum and pure tungsten.