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Can 316 stainless steel be heat treated? What is the hardness of 316 stainless steel itself?

by:Kehua     2022-07-21
The stainless steel industry is a popular industry at the moment. Everyone knows that it is inevitable to process stainless steel when ordering stainless steel products, and it also undergoes various treatments during production. The following editor will answer the questions about whether 316 stainless steel can be heat treated. Can 316 stainless steel be heat treated? Stainless steel 316L is austenite. There is no phase transformation during heating, so it cannot be strengthened by heat treatment. Heat treatment can only be carried out to improve the corrosion resistance of steel: 1) Kehua Induction Heating Equipment solution treatment: the purpose is to fully dissolve the carbides and retain them in austenite at room temperature, so as to obtain single-phase austenite at room temperature structure, so that the steel has the highest corrosion resistance. The heating temperature of Kehua Induction Heating Equipment solution treatment is generally high, between 1050-1100 ℃, and it is adjusted appropriately according to the level of carbon content. Due to the poor thermal conductivity of 18-8 stainless steel, it is not only necessary to perform quenching and heating after preheating, but also the holding time during solution treatment (quenching and heating) is long. During solution treatment, special attention should be paid to preventing carbon increase. Because carbon increase will increase the intergranular corrosion tendency of 18-8 steel. The cooling medium is generally clean water. The microstructure after solution treatment is generally single-phase austenite, but stainless steel containing titanium, niobium, and molybdenum, especially when it is cast, also contains a small amount of ferrite. The hardness after solution treatment is generally around 135HBS. Can 316 stainless steel be heat treated? What is the hardness of 316 stainless steel itself? Generally speaking, the hardness of 316 is less than or equal to 187 (HB) 90 (HRB). After a complete annealing, there is no problem of springback. (If the springback is still very large after annealing, then the processing technology can only be changed.) Can 316 stainless steel be heat treated? What is the high temperature resistance of 316 stainless steel? So high, there is a critical point at 450 degrees. The situation is as follows: 316 stainless steel is not easy to maintain at 450 to 860 degrees, because when the temperature is above 450 degrees, it will dilute the surrounding chromium, form chromium carbide, and cause a chromium-poor area, thereby changing the performance of stainless steel material, and the temperature of 450 plus the yield force will cause the austenite to transform into martensite. To put it simply, the performance and structure of 316 stainless steel will change when it is often used in an environment above 450 degrees. The above is the relevant answer about whether 316 stainless steel can be heat treated. 316 stainless steel can be heat treated, but because the steel purity is different, heat treatment also has related requirements, which will be different from general steel treatment.
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