Metal stamping parts processing quality from those aspects?
　　Our daily life, metal stamping parts everywhere, to improve customer productivity and quality as the goal, the introduction of foreign advanced technology with the product of metal stamping parts from the quality of those aspects reflected it? Analyze from the following several points
　　1, chemical analysis, metallographic examination
　　of the content of chemical elements in the material, determine the level and uniformity of the grain size of the material, and assess the level of free cementite, banded structure and non-metallic inclusions in the material, Check the material for shrinkage, looseness, and other defects.
　　2. Material inspection
　　The materials processed by stamping parts are mainly hot-rolled or cold-rolled (based on cold-rolled) metal strip materials. The quality of metal stamping parts should have a quality certificate, which ensures that the materials meet the specified technical requirements. When there is no quality certificate or for other reasons, metal stamping parts manufacturers can choose raw materials for reinspection as needed.
　　3. Forming property test The
　　material is subjected to bending test and cupping test to determine the material's work hardening index n value and plastic strain ratio r value. In addition, the test method for the forming property of the steel sheet can be specified according to the forming property and test method of the steel sheet. get on.
　　4, hardness testing
　　Metal stamping parts hardness testing using Rockwell hardness tester. Small, complex-shaped stampings can be used to test flat surfaces that cannot be measured on an ordinary bench Rockwell hardness tester.
　　5, other performance requirements Determination
　　of the electromagnetic properties of the material and the coating, coating adhesion ability.