1. Chemical analysis and metallographic examination
Analyze the content of chemical elements in the material, determine the grain size grade and uniformity degree of the material, evaluate the grade of free cementite, banded structure and nonmetallic inclusions in the material, and check the defects of the material such as shrinkage cavity and porosity.
2. Material inspection
The materials processed by metal stamping parts are mainly hot or cold rolled (mainly cold rolled) metal plate and strip materials. The raw materials of metal stamping parts should have a quality certificate, which guarantees that the materials meet the specified technical requirements. In the absence of quality certificate or for other reasons, metal stamping parts manufacturers can choose raw materials for reinspection as required.
3. Formability test
The bending test and cup test of the material are carried out to determine the work hardening index n value and plastic strain ratio r value of the material. In addition, the formability test method of the steel plate can be carried out according to the formability and test method of the thin steel plate.
4. Hardness testing
Rockwell hardness tester is used to test the hardness of metal stamping parts. Small, complex shaped metal stamping parts that can be used to test surfaces that are too small to be tested on a common bench Rockwell hardness tester.
5. Determination of other performance requirements
Determination of electromagnetic properties of materials and adhesion to coatings and coatings, etc.
The technical requirements for processing metal stamping parts are shared here. In addition, it should be noted that the accuracy and surface state of hot metal stamping parts are lower than that of cold metal stamping parts, but they are still better than castings and forgings, and the cutting amount is less.
Assetprecision is a professional manufacturer of customized precision metal parts. The advanced precision processing technology can achieve 0.05mm, providing customers with high-precision metal parts.
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