The quality of welding inspection can be divided into two situations: welding performance test and daily weld inspection. If the newly installed welding machine, the welding machine after major repair, or the welding process needs to be strictly adjusted and assessed. When it is judged that the welding performance test is necessary, the weld must be visually inspected, and the shear test must also be carried out. The shear test method is to select the representative weld after welding according to the specified process requirements, and make the tensile sample along the longitudinal direction。
And pay attention to the position of the weld in the center of the sample, and then go to the material performance testing machine for tensile test. Generally, it is required that the fracture does not occur in the weld, but breaks on the normal base material, and the tensile strength value is within the normal range, which means the weld is qualified. If the fracture occurs on the weld and reaches the specified shear strength (generally more than 250N / mm2), the weld is also qualified. In this test, the weld is subject to shear stress, so it is shear strength
