Welding is the process of joining two or more parts by fusing them. For the welding of S355JR steel, the following are some common technical points:
1. Before welding, impurities such as grease, rust, and carbides on the steel surface should be removed to ensure that the welding area is clean.
2. Select the appropriate electrode or wire. Generally, welding consumables such as E7018, E70S-6 or ER70S-6 can be used to weld S355JR steel.
3. Control welding current and voltage. Generally speaking, the welding current of S355JR steel should be between 100-150A, and the welding voltage should be between 20-25V.
4. Control the welding speed and temperature. Welding fast will result in poor weld quality, while welding too slow may cause oxidation and distortion. In addition, care should be taken to control the welding temperature during welding to avoid overheating or overcooling the welding area.
5. Post-processing should be carried out after welding, such as grinding, deburring, etc. In addition, non-destructive testing should also be carried out on the welded area to ensure that the quality of the weld meets the requirements.
It should be noted that different welding methods will have different points and precautions. Therefore, in practical application, the appropriate welding method should be selected according to the specific conditions of S355JR steel, and the relevant safety regulations and operating requirements should be strictly followed.
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