Fixture and tool heat treatment quality inspection

Fixture for heat treatment quality inspection mainly include visual inspection, three deformation test, hardness test, metallographic examination generally does not make the request, if you want to test, metallographic requirements of inspection reference with steel production tools.

1. Appearance inspection. Use the naked eye to observe the surface of the fixture with cracks, rust, ablation, salt or other dirt.

2. Deformation orange test. Check the expansion and warping of the workpiece size, and must ensure the proper amount of grinding, so the parts should be straightened out in time. Fast annealing or positive fire should be taken when the deformation is too poor to be straightened. After straightening, the correction shall be re-tempered and straightened.

3. Hardness test. The hardness test of fixture is more difficult than the measuring tool, and it is also difficult to measure accurately. This requires some auxiliary supports or fixtures for measuring hardness.

Other tools include hardware tools, woodworking tools, agricultural machinery, garden tools, hand tools, etc., these tools have the corresponding national standards and ministerial standard or industry standard, heat treatment quality inspection should be in accordance with the technical conditions, the appearance, deformation tools, hardness and metallographic inspection of the project, some tools will do mechanics performance test, the enterprise internal control standard is more strict than the national standards, industry standards, some tools for cutting test and life test.

Some countries in Europe and America buy some hardware tools or carpentry tools in China. When checking goods, first make the performance test, if the performance test is all qualified, then check the appearance, hardness and so on.