Casting Future Perfection
With the development of the social economy and science and technology, enterprises have put forward higher requirements for welding production. Automatic welding equipment meets the improvement of welding efficiency while stabilizing welding quality.
The selection of welding current is the key to ensuring welding quality. Excessive welding current can easily cause defects such as undercuts, weld bumps, burn-through, etc., especially in vertical and overhead welding operations. Welding defect. If the welding current is too small, the penetration depth of the weld will be reduced, and it is easy to cause defects such as incomplete penetration, slag inclusion, shrinkage, and lack of fusion.
When the stainless steel pipe in petrochemical construction is welded, the surface of the weld bead and the heat-affected zone is prone to oxidation and discoloration. In order to ensure the corrosion resistance of the stainless steel, the weld is pickled and passivated after welding to form a dense layer on the surface However, the inner wall of the stainless steel pipe is often unable to be pickled and passivated, which seriously reduces the corrosion resistance of the inner wall of the stainless steel pipe.