What is the quality of hardware stamping parts from those aspects?
Our daily life, metal stamping parts is everywhere, in order to improve customer production efficiency and quality as the goal, constantly introducing advanced foreign technology and products of metal stamping parts from those aspects show up? The following points are analysed
1. Chemical analysis and metallographic examination
Analysis of material, the content of chemical elements in decision level of material grain size and uniformity, assessment materials of free cementite in the non-metallic inclusions, banded structure and level, check material defects such as shrinkage cavity, porosity.
2. Material inspection
Stamping parts processing materials is mainly hot rolled or cold rolled (mainly cold-rolled) sheet metal materials, metal stamping parts of the raw material certificate should have the quality, it guarantees material conform to the provisions of the technical requirements. When there is no quality certificate or other reasons, the metal stamping parts production factory can select the raw materials to be reinspected according to the requirements.
3. Forming performance test
Bending test, cupping test was carried out on the material, determination of material strain hardening index n value and plastic strain ratio r value, etc., and the other on steel sheet formability test method, according to the provisions of the sheet metal forming performance and test methods.
4. Hardness detection
The hardness test of metal stamping parts adopts rockwell hardness tester. Small, complex shaped stamping parts can be used to test the plane very small and can not be tested on a standard rockwell hardness tester.
5. Other performance requirements
The electromagnetic properties of the materials and the determination of the adhesion of coatings and coatings.