1, responsible for incoming inspection of raw materials and welding materials. After receiving the notice of raw materials and welding materials entering the factory, the tester shall conduct sampling inspection on each batch of raw materials and welding materials in time according to the specified requirements. Inspection items include visual inspection, chemical composition analysis, tensile test, Charpy impact test and metallographic microhardness. The test report shall be sent to relevant departments in time;

2, responsible for product process inspection. According to the requirements of product standards, the products in the production process are sampled and tested. The test items include the analysis of the chemical composition of the substrate. Parent metal and weld tensile test, Charpy impact test, metallographic microhardness, etc. The sampling ratio shall be implemented according to the requirements of product standards.