热处理对304不锈钢板激光焊接接头组织和力学性能的影响
发布时间:2018-04-15 05:06
本文选题:不锈钢 + 激光焊接 ; 参考:《热加工工艺》2016年21期
【摘要】:采用YAG脉冲激光焊对304不锈钢薄板进行了搭接焊接,焊后并进行了不同工艺的热处理,分析了热处理工艺对焊接接头组织、硬度和抗拉强度的影响。试验结果表明:对焊接试样进行1000℃保温60min水冷(固溶处理)后,焊缝中心显微组织呈等轴晶,组织细小分布均匀,焊缝边缘呈柱状晶,垂直熔合线向中心延伸。焊缝区平均硬度达到216.4HV,接头抗拉强度为375MPa,远高于其他热处理工艺的接头抗拉强度。采用该热处理工艺,焊缝质量较好,具有较高的力学性能。
[Abstract]:YAG pulse laser welding was used to weld 304 stainless steel sheet. After welding, the effect of heat treatment on the microstructure, hardness and tensile strength of the welded joint was analyzed.The results show that the microstructure of the weld is equiaxed, the microstructure is uniform, the edge of the weld is columnar, and the vertical fusion line extends to the center after 1000 鈩,
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