Why test the hardness of metal stamping parts? How to detect?

Under normal circumstances, the raw materials used in the processing of metal stamping parts should meet the requirements of relevant standards. Generally speaking, the raw materials of metal stamping parts will be equipped with corresponding quality certificates to ensure that the materials meet the specified technical requirements. If there is no quality certificate, or there are other special requirements, then we still need to re-inspect the raw materials. In fact, in the process of reinspecting the raw materials of stamping parts, we also need to analyze the content of chemical elements contained in the materials. In addition, the level of grain size and uniformity must be judged, and the level of free cementite, band structure and non-metallic inclusions in the material must be evaluated. In addition, pay attention to check whether the material contains some defects such as shrinkage and porosity. In addition to the basic performance tests described above, we also need to perform forming performance tests on the raw materials of stamping parts. The main test items included are bending test and cupping test. In this process, we also need to determine the work hardening index n value and the plastic strain ratio r value of the material. Of course, for stamping parts, its hardness is also one of the important indicators to evaluate its performance and quality, so we also need to test its hardness. For now, when testing its hardness, we mainly use Rockwell hardness tester for testing. Especially for some small, special-shaped workpieces, it is more convenient to use this method to detect. In fact, the main reason for testing the hardness of stamping parts is to determine the hardness in advance, so as to avoid some problems caused by insufficient hardness. When testing its hardness, we can choose different Rockwell hardness testers for testing as needed. Related news: The characteristics of the main materials of stamping parts, the handling of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspections