Hangzhou mechanical processing manufacturers today to take people to understand the requirements for repair welding technology:

1, the defects must be thoroughly removed before repair welding, and the groove surface should be smooth and smooth without any sharp corners.

2. According to the defects of the steel castings, the defects in the repair welding area can be removed by digging, grinding, carbon arc gouging, gas cutting or machining.

3. The dirt, oil, water, rust and other dirt within 20mm within the welding area and groove must be thoroughly cleaned up.

4. During the whole process of repair welding, the temperature of the preheating zone of the steel castings should not be lower than 350° C.

5, if conditions permit, welding as far as possible at a horizontal position.

6. When welding is done, the electrode should not be swung too much.

7. When the surface welding of steel castings is done, the overlap between the welds shall not be less than 1/3 of the weld width.