20Cr钢激光焊接工艺与焊缝组织性能
Study of 20Cr steel Laser welding technology and microstructure
王能庆，童彦刚，杨小坡，贺晓娜
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作者单位：重庆大学材料科学与工程学院
中文关键字：20Cr钢；激光焊；焊缝组织；焊接参数
英文关键字：20Cr steel; laser welding; weld microstructure; welding parameter
中文摘要：研究了20Cr钢在不同激光功率条件下对焊接接头的宏观形貌及焊接热影响区宽度和组织的影响。结果表明，随着功率增大，热影响区宽度增大，其出现的淬火组织明显减少，焊缝晶粒变得粗大；焊接接头显微硬度分布不均匀，出现较高的硬度和较陡的硬度梯度。
英文摘要：Effects of laser power on weld macro-appearance and microstructure of HAZ for 20Cr steel are studied in the present work. The results show that with increasing the laser power, the width of HAZ increases, the hardened structure obviously decreases, and the weld grain becomes coarse; the hardness distribution of the weld is non-uniform, showing high micro-hardness and steep micro-hardness gradient.