The production process of tungsten alloys (W-Fe-Ni alloy) involves several steps to ensure the quality and properties of the alloy. The following are the usual steps for pruduce the W-Fe-Ni alloys:
Raw material preparation: First, prepare the required raw materials, mainly including tungsten powder, nickel powder and iron powder, the purity and quality of these raw materials are crucial to the performance of the final alloy. At the same time, various raw materials are accurately weighed according to the required alloy composition ratio.
Mixing: tungsten powder, nickel powder and iron powder are mixed evenly according to a certain proportion. This step can be done by mechanical mixing or using specialized mixing equipment, ensuring that the various elements are well mixed.
Forming: The mixed powder is put into the mold and formed by cold pressing or hot pressing. The molding pressure and time need to be adjusted according to the requirements of the specific process and requirement of the alloy.
Pre-sintering: After forming, the raw embryo is pre-sintered. This step is usually carried out at a lower temperature in order to make the initial bonding between the powder particles and lay the foundation for the subsequent sintering process.
Sintering: After pre-sintering, the raw embryo is put into a high temperature furnace for sintering. The sintering temperature and time are the key factors affecting the properties of the alloy, which need to be precisely controlled according to the specific requirements of the alloy.
Heat treatment and cooling: After sintering is complete, the alloy is heat treated to further improve its properties. After heat treatment, the alloy is allowed to cool naturally to room temperature.
Subsequent treatment: As needed, the alloy can be cut, polished, polished and other subsequent treatment to obtain the desired shape and surface quality.
During the preparation process, attention should also be paid to environmental protection and equipment safety. For example, measures should be taken to prevent dust pollution and ensure a safe and hygienic operating environment. At the same time, the selection and operation of the equipment must comply with the relevant safety regulations.
It is worth noting that the preparation method of W-Fe-Ni alloy is not unique, in addition to the above powder metallurgy method, there are other methods such as melt metallurgy.