Post-weld treatment of 40Cr steel

The weldability of 40Cr alloy steel is poor, and it is not easy to solder at room temperature. Stress annealing should be done immediately after welding of 40Cr steel, and the temperature of stress annealing should not be too high or too low, it should not be higher than 600 degrees and not lower than 450 degrees.

It is best to preheat the parts before welding of 40Cr steel, and to avoid drafts during the welding process.After welding of 40Cr steel, heat treatment and cold working should be carried out to eliminate welding stress and improve the strength of welded joints. After cold working, pickling and polishing should be carried out to ensure that the surface of the welded joint for 40Cr steel is smooth and beautiful.

It should be noted that when welding 40Cr steel, the correct welding process and welding materials must be followed to ensure the quality and strength of the welded joint. At the same time, pay attention to safety during the welding process of 40Cr steel and wear necessary protective equipment to avoid accidents such as inhalation of harmful gases and burns.