Why can't the gun tip of gas shielded welding be dipped in water for cooling?

The reason why the gas shielded welding gun head can't be dipped in water to cool down is that at high temperature, the welding gun head will contact cold water quickly after being heated, which will cause it to expand with heat and contract with cold, and it is easy to produce cracks or deformation, thus affecting the gas tightness and service life. According to the relevant public information, this process of thermal expansion and cold contraction may lead to cracks and deformation of the welding torch head, thus affecting the welding quality and air tightness. Therefore, in order to protect the torch head of gas shielded welding and prevent it from overheating, it is necessary to take other methods to cool it, such as using special coolant or letting the welder cool naturally. The torch head of gas shielded welding is usually made of metal material, which will produce high temperature when used.