Weld the metal with laser welding machine
The metal materials department has a very fast cooling rate, and at this time, The carbon content in the metal is a very important parameter, which affects the embrittlement, micro-crack and fatigue strength of the material. The volatilization of alloy elements in metal materials, and some highly volatile alloy elements evaporate from the molten pool during welding. It can lead to stomata, and is likely to produce bite edge. When the carbon content of carbon steel is welded by laser, the carbon content of the material should not be higher than 2%. When the content is more than 3%, the welding difficulty will increase, the cold crack tendency will increase, and the brittle fracture tendency of the material under fatigue and shading conditions will be increased. It is beneficial to reduce the shrinkage of weld by considering a certain amount of shrinkage in joint design. Residual stress and crack tendency in weld and heat affected zone. When a metal with a carbon content of more than 3% and a metal with a carbon content of less than 3% are used in laser welding equipment, the form of paranoid weld is beneficial to limit the transformation of martensite and reduce the occurrence of cracks. In this way, the quenching rate can be reduced and the crack tendency can be reduced.
Whether pulsed laser welding or continuous laser welding, the general pulsed laser welding machine can reduce the heat input, the generation of hot cracks and the deformation of the workpiece. To sum up, it is necessary to pay attention to laser welding of metal materials. In order to get products of good quality of metal materials, pay attention to the above items when welding.
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