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Abstract
Controlling welding hot cracking based on electromagnetic force was carried out. The results show that the welding cracking can be inhibited with this method, which lies on the voltage of capacitor and the frequency of applying force. The sheet bears the downward axial force and the less radial force of flat spiral coil. The radial force points at the centre of the sheet, so it is able to compress the weld metal. Moreover, the axial force also has the ability to compress the weld metal by means of the backing plate under weldment. Controlling welding hot cracking is mainly due to the improving of mechanical condition of weld metal within brittle temperature range.
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