There are different quality inspection standards for different grades of joints. The quality standards for joints include joint strength standards, workpiece size requirements, size and number of internal and external defects of joints, number of allowable repairs, and other special performance requirements. What are the specific requirements for semi-automatic welders?

After welding, the following methods are generally used to spot check the quality of the joint.

1. Appearance inspection, weld position, size and surface quality.

2. Ultrasonic test to see whether large inclusions, pores, shrinkage holes and oxide skin, etc

3. Metallographic test to see whether complete fusion and coarse band structure, etc.

4 bending test, to see the bending ability of the joint

5. Strength test to see the strength and plasticity, torsion resistance and fatigue ability of the joint.

6. Impact test to see whether the impact load resistance of the joint is up to standard.

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