The hardness of 304 stainless steel plate is difficult to improve, because the hardness is higher after direct hot rolling, and the hardness decreases after heat treatment! Therefore, the common method to increase the hardness of 304 stainless steel plate is to increase the hardness. Quenching, carburizing, nitriding and other processes can be used. Quenching and tempering can improve overall properties, including hardness.
304 stainless steel plate can only increase its strength by work hardening.
If you must use 304 material, you need to choose 304 stainless steel plate after cold forging or cold drawing as the blank. Generally, the deformation is greater than 75 percent , and the hardness can reach hv480 (hrc48.1). Due to the different material composition, the hardening effect corresponding to cold working deformation will be different. Martensitic stainless steels, such as 420, can be hardened by heat treatment, which is relatively easy to achieve.
304 is a general purpose stainless steel that is widely used in the manufacture of equipment and parts that require good overall properties (corrosion resistance and formability). To maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18 percent chromium and more than 8 percent nickel. 304 stainless steel is a brand of stainless steel produced according to the American ASTM standard.
In summary, the above is the main content of how to improve the hardness of 304 stainless steel plate. The hardness of 304 stainless steel is HB Less than or equal to 187hrb Less than or equal to 90hv Less than or equal to 200. Factors related to the hardness of stainless steel: 1. Stress will be generated after rolling, folding, etc., which will affect the hardness and solution treatment. 2. The most important thing is the material of the product itself. 3. At the same time, the products of different manufacturers will be different. 4. The grain size is related to the microstructure. 5. The degree of mastery of annealing directly affects the hardness.