Technical requirements for stamping parts

Stamping technology requirements: the use of raw materials for stamping parts, precision stamping parts. Must be in accordance with GB 710-710 'Quality Carbon Steel Sheet Technical ConditionsElectrical steel strip and other metal material standards, and meet the material supply status, or other requirements. The stamping certificate should be the quality of the raw material, it guarantees that the material meets the technical requirements. When there is no quality certificate or other reasons, the stamping parts factory selects raw materials for re-inspection as required. Appearance inspection: check the material surface defects, stains, outer contour size, shape and thickness, and surface roughness of the surface. Materials for chemical analysis, metallographic inspection, and chemical element content analysis; determine the particle size and uniformity of the material, evaluate the material's free cementite, band structure and non-metallic inclusion level; shrinkage and other defects, check the porosity of the material. Tensile strength, yield strength, σσb display σ age/σ, elongation delta, reduction of area b position and Rockwell hardness HRB and other forming performance tests of material mechanical performance test, bending test, cupping test material, measure material strain Hardening index n value and plastic strain ratio r value, etc. Regarding the steel sheet forming performance test method, according to the specified sheet metal forming performance and test method. Other performance metrics: determination of electromagnetic properties of materials and coatings, coating adhesion, etc.