激光与光电子学进展, 2020, 57 (5): 051406, 网络出版: 2020-03-05   

热输入对QP1180钢激光焊接接头组织性能的影响 下载: 889次

Effect of Heat Inputs on Microstructure and Properties of QP1180 Steel Laser Welded Joints
作者单位
1 西南林业大学机械与交通学院, 云南 昆明 650224
2 苏州大学沙钢钢铁学院, 江苏 苏州 215021
3 安徽工业大学冶金工程学院, 安徽 马鞍山 243032
摘要
利用IPG YLS-6000光纤激光器对厚度为1.6 mm的QP1180高强钢进行激光焊接,研究了不同热输入(14~36 J/mm)对激光焊接接头组织及性能的影响。研究结果表明,热输入值达到21 J/mm及以上时可获得全熔透焊接接头,且随着热输入值的增加,熔宽逐渐增大。焊接接头存在软化区,但软化程度较低(≤10.1%)。焊接接头软化区受两侧强化相的约束,导致完全熔透焊接接头拉伸后断裂在母材处,强度与母材相当。杯突试验中,热输值入为21~36 J/mm时,焊接试样开裂位置垂直于焊缝失效,三种全熔透焊接接头的杯突值均达到了母材的70%。激光焊接热输入值控制在21~36 J/mm,可保证全熔透焊缝性能满足工业化应用要求。
Abstract
The 1.6 mm thick advanced high strength steel QP1180 was welded by an IPG YLS-6000 fiber laser. The effects of different heat inputs (14-36 J/mm) on the microstructure and properties of laser welded joints were investigated. The results show that the full penetration welded joint was obtained when the heat input reached 21 J/mm and above, and the width of fusion zone increased with the increase of heat input. There was a softened zone in the welded joints, but the degree of softening was low (≤10.1%). The softened zone was bound by the strengthening phase on both sides, leading to the fracture in the base metal, and the strength was equivalent to that of the base metal. In the Erichsen test, when the heat input was 21-36 J / mm, the cracking positions of the welding samples were perpendicular to the weld failure. The Erichsen values of three fully penetration welded joints all reached 70% of the base metal. The laser welding heat input range of 21-36 J/mm can ensure the full penetration weld seam performance meets the requirements of industrial applications.

朱天才, 王晓南, 陈文刚, 胡增荣, 谢永, 杨彬, 余秋香. 热输入对QP1180钢激光焊接接头组织性能的影响[J]. 激光与光电子学进展, 2020, 57(5): 051406. Tiancai Zhu, Xiaonan Wang, Wengang Chen, Zengrong Hu, Yong Xie, Bin Yang, Qiuxiang Yu. Effect of Heat Inputs on Microstructure and Properties of QP1180 Steel Laser Welded Joints[J]. Laser & Optoelectronics Progress, 2020, 57(5): 051406.

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