1. As a metal material with good corrosion resistance, stainless steel usually has a weak hardness.
However, after heat treatment, the hardness of stainless steel can be improved to a certain extent, but the degree of improvement is closely related to the specific stainless steel material and heat treatment process conditions, so specific analysis is required.
Can stainless steel be heat treated and hardened 304 is an austenitic stainless steel, and the carbon content of austenitic stainless steel is very low. It is not possible to improve the hardness by heat treatment. However, it is possible to perform solid melt treatment.
3. Stainless steel heat treatment can effectively improve the processing performance, prepare a good metallographic structure for the final heat treatment, and eliminate internal stress. The general process methods of heat treatment of austenitic stainless steel include: stress relief annealing treatment, solution treatment, sensitization treatment, stabilization treatment and heat treatment of phase elimination.
4、.Can 304 stainless steel be heat treated and hardened 304 stainless steel is the standard name in the United States. SUS304 is the Japanese name. That is, China's 0cr18ni9, austenite at room temperature, quenching process can not achieve hardening, nitriding treatment surface strong hardening, but the depth is very limited.
1. Therefore, the higher the solution treatment temperature of austenitic stainless steel, the more complete the austenitization, the better the plasticity at room temperature, and the lower the hardness value, so the solution treatment is also called "water toughness treatment". Austenitic stainless steels cannot be increased by heat treatment, and the surface hardness value can only be increased by cold work hardening or deformation.
2. Which hardness is higher for austenitic 304L stainless steel solution treatment with high temperature or low temperature? Therefore, the higher the solution treatment temperature of austenitic stainless steel, the more complete the austenitization, the better the plasticity at room temperature, and the lower the hardness value, so the solution treatment is also called "water toughness treatment".
3. The degree of cold working also has an adverse effect on the high-temperature and lasting strength of 304L stainless steel cold-rolled plate. Generally, the higher the operating temperature or the higher the breaking life requirements, the lower the allowable degree of cold working.
4. The stainless steel is heated to about 1100 to make the carbide phase completely or basically dissolved, and the carbon is dissolved in the austenite, and then quickly cooled to room temperature to make the carbon reach a supersaturated state. This heat treatment method is solution treatment.
l Stainless steel has good corrosion resistance [2-6], but its range of use is limited due to its low carbon content and poor mechanical properties. In order to solve this problem, on the basis of 304L, nitrogen was added to the molten steel to improve its mechanical properties.
6. Due to the low carbon content of 304L stainless steel and the weak collapse resistance at high temperature, under the same conditions, the order of the transformation strength of the three stainless steels from small to large is: 304L< 304<321.