The heat-resistant stainless steel has good performance through metal powder injection molding

The heat-resistant stainless steel has good performance through metal powder injection molding

Heat-resistant stainless steel can be widely used in metallurgy, electric power, chemical industry, automobile and other fields. However, the working environment of these components is usually very poor. They not only have good high temperature, but also have strong corrosion resistance. The product maintains good performance in such a harsh environment, and it has been widely used.

According to different structures, heat-resistant stainless steels can be divided into austenitic, ferritic and austenitic-ferritic stainless steels. Nickel free (a rare metal) has developed rapidly in recent years due to its low price and stable performance in ferrite. However, there is a ferritic stainless steel with high alloy content, which is difficult to process. It will be formed by metal powder injection molding with excellent processing performance and high material utilization.

As the current status of the popular near-net forming technology, the small size parts produced by this technology have complex geometric shapes, unique advantages, unified organizational structure and high performance. The production of ferritic stainless steel with this technology will have high performance and low production cost. The following is the production process of ferritic stainless steel.

First of all, the preparation of feed and injection molding, in which the ferritic mixture of stainless steel powder paraffin-based binder, with a volume fraction of 57%, will be used for mixing at 155 ℃ for about 1 hour, and then it will be made into pellet feed, and then the activity will be made into a blank for injection at 155 ℃ and injection pressure of 100 MPa.

Secondly, degrease process, in which the blank will be soaked in trichloroethylene solvent at 40 ℃ for about 6 hours, and the solvent will degrease. At this time, the main binder existing in the blank will be almost completely removed, and the shape of the blank will appear three-dimensional interconnection structure. After solvent degreasing and thermal degreasing of the blank, the main components of the adhesive will be fully dispersed in the porous structure in the vacuum atmosphere, so that the adhesive will be completely removed.