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首页> 外文期刊>Lasers in Manufacturing and Materials Processing >Application of the Pulsed Nd: YAG Laser Welding to Investigate the Effect of Laser Beam Position on Weld Characteristics of AISI 420 Stainless Steel to Kovar Alloy
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Application of the Pulsed Nd: YAG Laser Welding to Investigate the Effect of Laser Beam Position on Weld Characteristics of AISI 420 Stainless Steel to Kovar Alloy

机译：脉冲Nd：YAG激光焊接的应用研究了激光束位置对AISI 420不锈钢焊接特性的影响KOVAR合金

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摘要

In the present study, dissimilar joining of AISI 420 Stainless Steel (SS 420) to Kovar alloy using a pulsed Nd: YAG laser welding was carried out. The effect of laser beam position with respect to the joint on the microstructure of dissimilar weldmetal was investigated through taking advantage of optical and scanning electron microscopy. Moreover, hardness measurement and fractography were performed to investigate the mechanical properties of weldmetal. A detailed effect of laser beam position on crack susceptibility of fusion zone is elaborated in this research work. The results showed promotion of susceptibility of fusion zone to cracking with offsetting laser beam position to SS 420 base metal. Also martensitic structure was formed in the weldmetal when off-set laser beam shifted 0.2 mm toward the SS 420 base metal. The microhardness test revealed that moving laser beam position toward SS 420 resulted in increasing weld hardness.
机译：在本研究中，进行使用脉冲Nd：YAG激光焊接的AISI 420不锈钢（SS 420）对KOVAR合金的不同的连接。通过利用光学和扫描电子显微镜研究了激光束位置对相差焊接微观结构的影响。此外，进行硬度测量和断裂以研究焊接的机械性能。在本研究工作中阐述了激光束位置对融合区裂缝敏感性的详细效果。结果表明促进融合区的敏感性，以偏移激光束位置到SS 420基金金属。此外，当偏移激光束向SS 420基金金属偏移0.2mm时，在焊接中形成马氏体结构。微硬度测试显示，移动激光束位置朝向SS 420导致焊缝硬度增加。

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