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将光纤激光焊接应用于冷凝管用紫铜板材焊接。选用2mm厚T2工业紫铜板作为研究对象,进行了紫铜的激光焊接实验,研究不同的激光焊接参数对焊接接头的组织和性能的影响。结果表明:激光功率对焊接接头的微观组织、显微硬度、导电率及耐蚀性等性能都会有明显的影响。焊缝区都形成了细小的等轴晶组织,熔合区形成了胞状晶组织;焊缝区出现显微硬度最大值,由焊缝到母材硬度呈先减小后增大的趋势,在热影响区出现了最小硬度值;适当的焊接参数会显著提高焊接接头的耐蚀性。
The fiber laser welding used in condenser tube copper plate welding. The 2mm T2 industrial copper plate was chosen as the research object. Laser welding experiment of copper was carried out to study the influence of different laser welding parameters on the microstructure and properties of welded joints. The results show that the laser power has a significant effect on the microstructure, microhardness, electrical conductivity and corrosion resistance of the welded joints. The weld zone formed a small equiaxed grain structure, the fusion zone formed a cellular crystal microstructure; weld zone appears the maximum microhardness, from the weld to the base material hardness first decreased and then increased the trend of hot Affected area appears the minimum hardness value; the appropriate welding parameters will significantly improve the corrosion resistance of welded joints.