In recent years, steel structures have become very popular.Many factories are built with steel structures.During construction, some steel structures need to be welded.What should be paid attention to when welding? 1. Welding deformation has a great influence on the construction quality of steel structure workshop.Therefore, measures should be taken to strictly control welding deformation.2. According to the thickness of the steel structure workshop plate, take corresponding preheating measures and interlayer temperature control measures.3. Multi-layer welding.After each welding, the welding slag and surface spatter should be removed in time.Defects affecting welding quality should be eliminated before welding.4. During continuous welding, the temperature of the base material in the welding area should be controlled to ensure that the temperature of the intermediate layer meets the requirements.In special cases, insulation measures should be taken when the welding operation is interrupted.When welding again, it should be preheated again, and the preheating temperature should be higher than the initial preheating temperature.5. During the welding process, fire and arc are strictly prohibited on the base metal outside the weld.6. After welding, the welding slag, welding slag and welding seam should be carefully removed.The weld surface shall be free from any defects such as undercuts, pores, cracks and flash.There should be no geometrical differences in the welding surfaces.Do not damage the parent material by cutting the connecting plate and removing the backing plate.connection board.After polishing, the lead-in and lead-out plates should be smooth and smooth.