他揉捏她两乳不停呻吟a片,亚洲国产成人精品无码区99,无码jk粉嫩小泬在线观看欧美,黑人上司粗大拔不出来电影

What aspects are reflected in the processing quality of hardware stamping parts?

In our daily lives, hardware stamping parts are ubiquitous. In order to improve customer production efficiency and quality, we continuously introduce advanced foreign technology and products. What aspects are the qualities of hardware stamping parts reflected in? Analyze from the following points

1. Chemical analysis and metallographic examination

Analyze the content of chemical elements in the material, determine the grain size level and uniformity of the material, evaluate the level of free cementite, banded structure, and non-metallic inclusions in the material, and check for defects such as shrinkage and porosity.

2. Material inspection

The materials used for stamping parts processing are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal plate and strip materials. The raw materials of hardware stamping parts should have quality certificates to ensure that the materials meet the specified technical requirements. When there is no quality certificate or for other reasons, hardware stamping parts manufacturers can choose raw materials for re inspection as needed.

3. Forming performance test

Conduct bending tests and cupping tests on materials to determine the work hardening index n and plastic strain ratio r values of the materials. Additionally, the testing methods for the formability of steel plates can be carried out in accordance with the regulations for the formability and testing methods of thin steel plates.

4. Hardness testing

The hardness testing of hardware stamping parts adopts a Rockwell hardness tester. Small, complex shaped stamping parts can be used to test flat surfaces that are too small to be tested on ordinary desktop Rockwell hardness testers.

5. Determination of other performance requirements

Measurement of the electromagnetic properties of materials and their adhesion to coatings and coatings.

That's all I need to share with you about the technical requirements for processing hardware stamping parts by Licao. Additionally, it should be noted that the precision and surface condition of hot metal stamping parts are lower than those of cold metal stamping parts, but still better than castings and forgings, with less cutting processing.