What are the main materials of stamping die

The main material of stamping die is die steel (including tool steel and high-speed steel), and sometimes cemented carbide is used.　　 Stamping molds usually require high hardness and wear resistance, and heat treatment is essential.　　The hardness test of die steel mainly adopts Rockwell hardness tester to test the HRC hardness value. When the mold is large and inconvenient to move, the Leeb hardness tester can be used. The hardness test of cemented carbide adopts Rockwell hardness HRA scale.　　In order to obtain high surface hardness and wear resistance, many stamping parts molds and stamping parts mold parts must be subjected to surface heat treatment, such as surface nitriding. For such a mold, people are very concerned about its surface hardness and the depth of the hardened layer. For stamping molds that are not too large and easy to move, the surface hardness HRN value can be directly tested on the surface Rockwell hardness tester. If the volume is large and not easy to move, the method of cutting the sample is adopted, and the HRN value is tested on the surface Rockwell hardness tester after sampling. You can also use a Vickers hardness tester to test the HV value. Another method is to use the same material to make small test pieces, heat them under the same conditions, and then measure the hardness of the test piece to estimate the hardness of the stamping die.