A MIM sintering process for 316L stainless steel |
Posted: July 19, 2023 |
Metal injection molding (mim) is to mix metal powder with binder to make a certain plasticity and fluidity of powder metallurgy feed material, injection molding by injection machine, and then remove the binder through catalytic degreasing, and then use high temperature sintering to get dense mim products, the resulting mim products have the advantages of uniform organization, high strength, high precision, good corrosion resistance, good surface finish, and mass production, The resulting mim products have the advantages of uniform organization, high strength, high precision, good corrosion resistance, good surface finish, and can be mass produced. In recent years, mim technology has gradually matured, 316l, 17-4ph and other stainless steels have been widely used in industry. The sintering deformation problem has been a technical problem in the mim industry. In response to this problem, the current mim process improvement measures are: 1. by the design of post-sintering ceramic support jig to assist sintering, to obtain products without deformation; 2. a new shaping process, through the design of profiling inserts, with external forces to make the product plastic deformation to improve the deformation. This is indeed effective for products with simple sintering structure, but it does not fundamentally improve the sintering deformation problem and cannot solve the sintering problem of some special structure products, such as thin or long neck structure, zigzag structure, etc.; and the subsequent increase of shaping process will cause new process problems and lead to cost increase. Stainless steel is the main material species in China's metal injection molding (MIM) marketMetal Injection Molding (MIM) is a new type of powder metallurgy near net molding technology derived from plastic injection molding industry. Compared with powder metallurgy, MIM has the advantages of good surface quality, low scrap rate, easy automation and high production efficiency; in addition, it has relatively low requirements for mold materials due to the addition of binder. From the perspective of MIM material variety pattern, at present, due to its high proportion of consumer electronics in the downstream market, MIM materials are mainly stainless steel, with a market share of 70% in 2019; followed by low-alloy steel, accounting for 21%; cobalt-based alloy and tungsten-based alloy account for a relatively low proportion, 6% and 2% respectively. . Harbermetal is a professional manufacturer and solution provider of metal powder injection molding process (MIM) and PM process. We provide our customers with high volume structural, functional and appearance parts of various materials with high precision, complex shapes, good performance and exquisite appearance, and we have the ability to develop ceramic and titanium alloy materials to meet the needs of different types of customers. The company mainly provides all kinds of precise and complex hardware structure parts and components to worldwide enterprises in the fields of 3C consumer electronics, new energy, drones, medical devices, automobiles, aerospace, civil consumer goods ...... etc.
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