In the process of using the welding machine, a certain magnetic field will be generated around the welding machine. When the arc burns, it will generate radiation. There are infrared light, ultraviolet light and other light species in the arc, as well as metal vapor and smoke and other harmful substances, so the operation must be Do enough protective measures. Welding is not suitable for the welding of high carbon steels. Due to the process of crystallization and segregation and oxidation of welding weld metal, welding performance is poor for high carbon steels, and cracks easily occur after welding, resulting in hot cracks and cold cracks.