工艺参数对工业纯钛激光焊接接头组织性能的影响

李镇; 石岩; 刘佳; 倪聪

应用激光, 2016, 36 (1): 53, 网络出版: 2016-03-28

工艺参数对工业纯钛激光焊接接头组织性能的影响

Effect of Laser Welding Parameters on Microstructure and Mechanical Properties of Commercial Pure Titanium

论文大纲

李镇 ^*石岩刘佳倪聪

作者单位

长春理工大学机电工程学院, 吉林长春 130022

激光焊接工业纯钛完全正交抗拉强度 laser welding commercial pure titanium completely orthogonal tensile strength

摘要

采用完全正交的方法进行工业纯钛激光焊接, 分别对不同焊接功率和速度输入条件下焊缝表面成形和横断面进行观察, 并利用光学显微镜、显微硬度计、扫描电镜等仪器对焊缝的微观形貌及力学性能进行了测试分析。结果表明, 焊缝主要由粗大晶α晶粒和针状α晶粒组成, 但在不同热输入情况下出现了锯齿状α晶粒和孪晶。焊缝和热影响区的显微硬度明显高于母材并且焊缝的硬度值最大, 焊接接头的抗拉强度高于母材, 焊接试样均断在母材。因此, 选用高功率和高速度的焊接工艺参数, 能使焊接过程尽快完成, 从而提高生产效率。

Abstract

Complete orthogonal method was used to carry out industrial pure titanium laser welding. The weld appearance and cross section were observed under different welding power and speed input. The microstructure and mechanical properties of the weld seam were analyzed by optical microscope, micro-hardness tester, scanning electron microscope, etc. The experimental results show that the weld is composed of coarse grain and needle like crystal. but serrated alpha grains and twins are found in the different heat input conditions. The microhardness of the weld seam and heat affected zone is higher than that of matrix, and the weld seam exhibits the highest values in the welded joint. The tensile strength of the welded joints is over the base metal. The welded samples were all broken in matrix. Therefore, the use of high power and high speed of welding process parameters improve the welding process, and improve the production efficiency.

参考文献

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李镇, 石岩, 刘佳, 倪聪. 工艺参数对工业纯钛激光焊接接头组织性能的影响[J]. 应用激光, 2016, 36(1): 53. Li Zhen, Shi Yan, Liu Jia, Ni Cong. Effect of Laser Welding Parameters on Microstructure and Mechanical Properties of Commercial Pure Titanium[J]. APPLIED LASER, 2016, 36(1): 53.

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