Nowadays, many transportation, machinery, and electronic products are processed by powder metallurgy. Stainless steel powder metallurgy technology can be directly made into porous, semi-dense, or fully dense materials and products. Stainless steel powder metallurgical processing has unique chemical composition and mechanical and physical properties. These properties can not be obtained by traditional casting methods. What is powder metallurgy? What is the process of stainless steel powder metallurgy?
Stainless Steel Powder Metallurgy Process:
Stainless steel powder metallurgy is made of stainless steel powder as raw material and is refined by forming-sintering method. The traditional process flow: mixing powder-pressing-sintering-finishing-post-processing(soaking oil; Packaging; Machine processing, etc.). That is to say, the prepared high-purity mixed powder is first installed in the mold, pressed under the pressure of Yuyiding, and then the pressed billet is sintered in a controlled atmosphere sintering furnace at a temperature below the melting point of the matrix material. Metallurgical binding is formed between the powder particles.
1, mixing: not mixing steel powder, additives, etc. mixing for 1 hour.
2, forming: according to the product size, structure, shape, design mold drawings, according to the drawings to make cemented alloy mold, and then install the test die, test out the template, mold design production cycle of one week.
3, skim: temperature 800 degrees, vacuum bell furnace or net furnace skim, excluding added lubricant, period: 8-10 hours.
Sintering: Sintering is a key process in powder metallurgy. After forming, the pressed billet is sintered to obtain the required final physical and mechanical properties. Sintering is divided into unit sintering and multicomponent sintering. The sintering temperature is lower than the melting point of the metal and alloy used for solid phase sintering of unit and multicomponent systems.
5, follow-up treatment: After the sintering treatment, depending on the requirements of the product, take a variety of methods. Such as finishing, oil immersion, machining, heat treatment and electroplating. In addition, some new processes, such as rolling and forging, have been applied to the sintering process of powder metallurgical materials in recent years.