Vacuum heat treatment is a process of heating and cooling metals or alloys under high vacuum or protective atmosphere, and is often used to improve the mechanical properties, dimensional stability and surface quality of materials.

With the continuous development of nuclear energy technology, the requirements for thermal stability, corrosion resistance and structural integrity of materials under extreme conditions are increasing, and tungsten crucibles have become one of the important containers for the processing and research of highly radioactive materials, molten nuclear fuel, high-temperature structural materials and radioactive waste due to their excellent physical and chemical properties.

In the field of modern high-end manufacturing, superalloys are widely used in aerospace, gas turbines, nuclear industry and high-temperature chemical industries due to their excellent high-temperature strength, oxidation resistance and corrosion resistance. 

With the rapid development of semiconductor technology, the requirements for material purity, structural stability and preparation process are increasing. Due to its excellent physical and chemical properties, tungsten crucible occupies an extremely important position in the preparation of semiconductor materials, especially in key processes such as high-temperature crystal growth, smelting, and vapor deposition.