威廉希尔官方下载Feb 05, 2020
Compared with traditional welding methods, laser welding can cover a wide range, both non-metallic and metallic materials can be welded.
Common metal materials are iron, chromium, manganese, titanium, nickel, zinc, copper, silver, aluminum, gold. Generally, laser welding can be welded between the same metal materials, or alloys composed of multiple metal elements. In addition, laser welding can be performed between multiple dissimilar metals.
For the welding of metallic materials, the characteristics of the metallic materials determine the welding process. Here are some precautions for metal laser welding:
1. The cooling speed of metal materials is fast, which is determined by the carbon content in the metal, and it also affects the embrittlement, micro-cracks and fatigue strength of the metal materials.
2. During the welding process, the highly volatile alloy elements in the metal alloy are volatilized from the molten pool, which will lead to the generation of pores and undercuts.
3. When welding carbon steel materials, the carbon content should be less than 2%. When the carbon content is greater than 3%, the difficulty of laser welding will increase, because the material's tendency to brittle fracture under fatigue and shading conditions increases. Already.
4. Medium and high carbon steels and ordinary alloy steels can be pre-heated and post-weld treated to eliminate stress, avoid crack formation, and obtain good welding results.
5. Compared with carbon steel, stainless steel is easier to obtain good welding results and narrow deep welding seams due to its low thermal conductivity.