Stainless Steel Welding Process

1.Welders must pass the corresponding test pieces in accordance with the provisions of the "Examination Rules" before they can start welding.

2. It is strictly forbidden to ignite the arc, test current or weld temporary supports at will on the surface of the weldment.

3. The argon arc welding handle and the argon gas decompression flowmeter used by the welder should be checked frequently to ensure that the argon gas is in a laminar flow state during the argon arc welding back cover.

4. Before the interface, the oil, paint and rust on the surface of the groove and the inner and outer walls of the base metal should be cleaned until it emits a metallic luster.

5. The interface gap should be uniform and straight, and strong counterparts are prohibited. The misalignment value should be less than 10% of the wall thickness and not greater than 1mm.

6. When the local gap of the interface is too large, it should be trimmed, and it is strictly forbidden to add plugs in the gap.

7. After the interface is qualified, there should be 4-5 points according to the length of the interface. The material of the spot welding should be the same as the formal welding. The length of the spot welding is 10-15mm and the thickness is 3-4mm.

8. After the primer is completed, the quality of the primer weld should be carefully checked, and the argon arc welding cover welding should be carried out after confirming that it is qualified.

9. The arc striking and arc ending must be carried out in the interface, the arc ending should fill the molten pool, and lead the arc to the groove to extinguish the arc.

10. For spot welding, argon arc welding, and cover welding, if there is a defect, it must be ground with an electric grinding tool, and then continue welding, and the repeated melting method shall not be used to eliminate the defect.

11. Attention should be paid to the quality of the joint and the crater. Note that the joint should be well fused, and the molten pool should be filled when the arc is stopped. To ensure the tightness of the weld.

12. After the cover is completed, the slag and splash on the surface of the weld should be cleaned in time.