What are the precautions for EH36 high strength steel plate welding?

1. Welding shall be carried out in strict accordance with the welding process specification, and the welding wiring energy shall be well controlled. It is forbidden to use super current and too slow welding speed for welding, so as to prevent the weld and heat affected zone from coarse grains and serious burning damage of alloy elements caused by overheating.

2. Control the cooling rate to prevent the formation of hardened structure and cracks.

3. Reasonable selection of welding materials is an important factor to ensure the weld quality. According to the specification requirements of GL, 3Y grade welding material is used when the plate thickness is less than or equal to 50mm;
When the thickness of the plate is more than or equal to 50mm and less than 70mm, 4Y grade welding material shall be selected; 5Y grade welding material shall be used when the plate thickness is 70mm or more and 100mm or less.

4. The operator shall pay attention to:
1) It is forbidden to strike arc on the surface of EH36 high strength steel plate at will. It is required to strike arc in the groove or with arc strike plate.
2) Prevent the surface of steel plate from being scratched due to the damage and exposure of welding cable, and avoid the mechanical impact on the surface of EH36 high strength steel plate.