高频振动下的不锈钢激光焊接

何晓峰; 卢庆华; 彭必荣; 于治水

高频振动下的不锈钢激光焊接

1.
上海工程技术大学材料工程学院, 上海 201620
2.
上海工程技术大学材料工程学院, 上海 201620;上海市高强激光智能加工装备关键技术产学研开发中心, 上海 201620

基金项目: 国家自然科学基金资助项目（51305253，51375294）

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出版历程
- 收稿日期: 2014-11-24

Stainless steel laser welding in high-frequency vibration condition

1.
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2.
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;Shanghai Research & Development Center for Key Technologies of Intelligent Equipments of Ultra-Intense Laser Processing, Shanghai 201620, China

摘要

摘要: 在不锈钢激光焊接过程中对工件施加高频振动，研究不同焊接速度和振动频率对接头宏观成形、微观组织及显微硬度的影响. 结果表明，焊缝边缘为柱状树枝晶，中央为细小等轴晶，焊缝组织为奥氏体和残余δ铁素体. 焊接速度增加，虽可使熔宽和焊缝区晶粒尺寸减小，接头硬度增大，但无法阻碍树枝晶的生长. 施加高频振动可抑制枝晶的数量和大小，并增加焊缝中等轴晶的数量，优化接头综合性能. 振动频率增加，焊缝区晶粒尺寸减小、等轴晶数量增加且有细小等轴晶弥散分布于树枝晶之间，焊缝硬度增大，振动起到了细晶强化的效果. 而振动频率对熔宽并无明显影响.
- 激光焊接 /
- 高频振动 /
- 微观组织 /
- 显微硬度
Abstract: In this paper, vibration is applied to stainless steel laser welding. Both parameters of welding speed and vibration frequency are changed respectively in order to find out whether the change of two parameters have influences on joint dimension, microstructure and microhardness. The results show that, all the weld joints are mainly composed with columnar dendrites in the edge of joint and isometric crystal in weld seam centre, and weld structure is austenite and residual δ ferrite. With the increase of weld speed, though both weld width and grain size decrease distinctly while the microhardness of the joint increase, but the growth of columnar dendrites cannot be impeded. The application of vibration can restrains both the size and quantity of the columnar dendrites, and the number of isometric crystal can be increased. So that property of the joint can be improved. The increase of vibration frequency diminish the grain size of the weld zone but the number of equiaxed crystals increase in quantity, and it can be found that fine equiaxed crystals disperse in the boundary of dendrites. The refinement of the grain increase the microhardness of the joint which has an effect of crystal reinforcing. However, vibration frequency has no effect on weld width.
- laser welding /
- vibratory welding conditioning /
- microstructure /
- microhardness

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参考文献(13)

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施引文献(6)

期刊类型引用(2)

1.	刘浩东，戴京涛. 激光焊接技术的应用研究进展与分析. 电焊机. 2022(01): 95-102 . 百度学术
2.	张成，卢庆华，蔡遵武，张培磊. 高频微振辅助工艺对激光焊接接头组织性能的影响. 焊接学报. 2019(02): 86-90+165 . 本站查看

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文章访问数: 392
HTML全文浏览量: 2
PDF下载量: 223
被引次数: 6

高频振动下的不锈钢激光焊接

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出版历程

Stainless steel laser welding in high-frequency vibration condition

期刊类型引用(2)

其他类型引用(4)

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出版历程

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