Stainless steel powder metallurgy processing flow

Stainless steel powder metallurgy processing flow

As the name implies, stainless steel powder metallurgy is the stainless steel produced by powder metallurgy. Compared with stainless steel produced by traditional smelting process, stainless steel has the advantages of producing parts close to net shape, high dimensional accuracy, high material utilization rate, and even structure. So you know what is the process of stainless steel powder metallurgy? Here is a brief introduction of the Zhongwei Precision Editor:

Powder metallurgy processing

With stainless steel powder as raw material, it is refined by forming sintering method. The traditional process flow is: powder mixing - pressing - sintering - finishing - post-processing (oil immersion; packaging; machining, etc.). That is, firstly, the prepared high-purity mixed powder is loaded into the mold, and then pressed under a certain pressure to form, and then the compact is sintered in a controlled atmosphere sintering furnace at a temperature lower than the melting point of the base material, so that metallurgical bonding is formed between the powder particles.

1. Mixing: mix stainless steel powder and additives for 1 hour.

2. Forming: according to the size, structure and shape of the product, design the mold drawing, make the hard alloy mold according to the drawing, then install the machine to test the mold, and try to press the template. The mold design and production cycle is one week.

3. Degreasing: at 800 ℃, degrease in the vacuum bell furnace or mesh belt furnace, and remove the added lubricant. Period: 8-10 hours.

4. Sintering: Sintering is a key process in powder metallurgy. The formed compacts can obtain the required final physical and mechanical properties through sintering. Sintering can be divided into unit system sintering and multi-element system sintering. For solid state sintering of single system and multicomponent system, the sintering temperature is lower than the melting point of the metals and alloys used.

5. Subsequent treatment: various methods can be adopted for the treatment after sintering according to different product requirements. Such as finishing, oil immersion, machining, heat treatment and electroplating. In addition, in recent years, some new processes, such as rolling and forging, have also been applied to the processing of sintered P/M materials and achieved satisfactory results.

The above is the introduction to the process of stainless steel powder metallurgy. The use of stainless steel powder metallurgy can refine the microstructure, reduce the segregation of alloy elements, and improve the performance of materials. In addition, it can save raw materials and energy consumption to achieve low-carbon, green and environmental protection. It has been widely used in machinery, chemicals, ships, automobiles, instruments and meters and other industries.