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目的 评价微束等离子弧熔焊钴铬合金的焊接性能。方法 采用微束等离子弧焊机熔焊钴铬合金试件 ,测试钴铬合金焊区的抗拉强度、显微硬度 ,观察其金相组织结构 ,能谱成分扫描 ,并与母材成分相比较。结果 焊接接头各项性能指标与母材一致。焊件拉伸实验时有二分之一的断裂出现在母材 ;焊缝与母材显微组织一致 ;母材与焊缝连接良好 ,未见任何缺陷 ;焊缝处的显微硬度值与母材接近 ,显微观察亦未发现明显焊接热影响区。母材与焊缝能谱分析 ,两者元素化学成分非常接近 ,其主要元素钴和铬所占的质量比 ,母材分别为 71 .1 9%、1 9.72 % ,焊缝分别为 71 .1 1 %、1 9.73 %。结论 微束等离子弧熔焊钴铬合金机械性能优良 ,有临床应用前景
Objective To evaluate the welding performance of cobalt-chromium alloy by micro-beam plasma arc welding. Methods The micro-beam plasma arc welding machine was used to weld the cobalt-chromium alloy specimen to test the tensile strength and micro-hardness of the cobalt-chromium alloy weld zone. The microstructure and energy spectrum of the cobalt-chromium alloy welding area were observed and compared with the base metal composition . Results Welded joints of the performance indicators consistent with the base metal. One-half of the fracture in the weldment tensile test occurred in the base metal; the weld was consistent with the base metal microstructure; the base metal was well connected with the weld without any defects; the microhardness value Near the base metal, microscopic observation also found no significant weld heat affected zone. The elemental chemical compositions of the two were very similar to those of the base metal and the weld. The mass ratio of the main elements, cobalt and chromium, was 71.1% and 1 9.72% respectively, and the weld seams were 71.1 1%, 1 9.73%. Conclusion Micro-plasma arc welding of cobalt-chromium alloy has excellent mechanical properties and clinical application prospect