What are the advantages of stainless steel powder metallurgy?

Stainless steel powder metallurgy is stainless steel made by powder metallurgy method. It is a kind of powder metallurgy material that can be made into steel products or parts. Stainless steel powder metallurgy can save raw materials and energy consumption, and achieve low carbon, green, and environmental protection. It is widely used in machinery, chemical industry, shipbuilding, automobiles, instrumentation and other industries. So, what are the advantages of stainless steel powder metallurgy? Below is Zhenglang Precision The editor introduces to you:

1. Corrosion resistance of stainless steel powder metallurgy

Corrosion resistance refers to the ability of stainless steel to resist corrosion damage from media. Corrosion resistance includes rust resistance and resistance to corrosive media such as acids, alkalis, and salts, as well as resistance to oxidation, sulfidation, chlorination, fluorination, etc. at high temperatures. When choosing powder metallurgy stainless steel, in addition to paying attention to the general corrosion resistance of stainless steel, you must also pay attention to local corrosion under specific use conditions.

2. Mechanical properties of stainless steel powder metallurgy

Powder characteristics, sintered body density and sintering parameters determine the mechanical properties of powder metallurgy stainless steel. For example, the production of medium-density stainless steel (6.2-3.6g/cm3) is usually pressed at 415-825MPa and sintered at 1120-1150 degrees Celsius in decomposed ammonia, hydrogen or vacuum. By sintering at a higher temperature of 1260-1315 degrees Celsius, excellent elongation, impact toughness and corrosion resistance can be obtained.

3. Machinability of stainless steel powder metallurgy

The machinability of sintered stainless steel is the same as that of forged stainless steel. Improved cutting when sintering at high temperatures and when sintering in hydrogen or vacuum. When sintering in a nitrogen-containing atmosphere, the absorption of nitrogen will increase the hardness and impair the machinability. In industrial production, manganese sulfide can be added to 304L to improve machinability.

Common materials for stainless steel powder metallurgy include 304, 316, and 420. 304 is a versatile stainless steel that is non-magnetic, has good overall performance, and has strong corrosion resistance. 316 stainless steel powder metallurgy is non-magnetic and adds Mo element to make it corrosion-resistant. , and high temperature strength have been greatly improved, and can be used under harsh conditions. 420 is also generally called stainless iron. It has weak magnetism, has certain wear resistance and corrosion resistance, and has high hardness. It can be heat treated and hardened. Of course, there is also 303 stainless steel, but it is generally less used and is only used occasionally when there are subsequent cutting processes.