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工艺路径对多层多道激光熔覆残余应力的影响

傅卫, 方洪渊, 白新波, 陈国喜

傅卫, 方洪渊, 白新波, 陈国喜. 工艺路径对多层多道激光熔覆残余应力的影响[J]. 焊接学报, 2019, 40(6): 29-33. DOI: 10.12073/j.hjxb.2019400150
引用本文: 傅卫, 方洪渊, 白新波, 陈国喜. 工艺路径对多层多道激光熔覆残余应力的影响[J]. 焊接学报, 2019, 40(6): 29-33. DOI: 10.12073/j.hjxb.2019400150
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FU Wei, FANG Hongyuan, BAI Xinbo, CHEN Guoxi. Effect of process paths on residual stress of multi-layer and multi-pass laser cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(6): 29-33. DOI: 10.12073/j.hjxb.2019400150
Citation: FU Wei, FANG Hongyuan, BAI Xinbo, CHEN Guoxi. Effect of process paths on residual stress of multi-layer and multi-pass laser cladding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(6): 29-33. DOI: 10.12073/j.hjxb.2019400150
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工艺路径对多层多道激光熔覆残余应力的影响

  • 1.

    哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001;上海宝钢工业技术服务有限公司, 上海 201900

  • 2.

    哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001

  • 3.

    上海宝钢工业技术服务有限公司, 上海 201900

基金项目: 青年科学基金资助项目（51605116）

Effect of process paths on residual stress of multi-layer and multi-pass laser cladding

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;Shanghai Baosteel Industry Technology Service Co., Ltd., Shanghai 201900, China

  • 2.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

  • 3.

    Shanghai Baosteel Industry Technology Service Co., Ltd., Shanghai 201900, China

摘要

    摘要
  • 摘要: 采用盲孔法测量Q345钢块表面多层多道激光熔覆Co基涂层的残余应力，研究了熔覆工艺路径对激光熔覆残余应力的影响.结果表明，平行焊道方向的残余应力远大于垂直焊道方向的应力，且均为拉应力；增加激光熔覆层单层厚度，熔覆层及试板背部基材残余应力明显增大.与两层熔覆层激光焊道平行叠加的熔覆路径相比，采用两层熔覆层垂直交叉的熔覆工艺路径，降低了熔覆层的残余应力，采用分区熔覆且每个区域各熔覆层垂直交叉堆焊的熔覆工艺路径，熔覆层残余应力水平最低；熔覆前对试板进行2 mm的预弯变形对涂层残余应力影响不明显，但显著降低了试件背面的残余应力.
    Abstract: Residual stresses of multi-layer laser cladding Co-based coating on Q345 steel surface are measured by blind hole method, and the influence of laser cladding process paths on residual stress of each laser cladding layer is studied. The test results show that the residual stress along the laser cladding scanning direction is much larger than the stress in the vertical direction of the weld bead, and both are tensile stresses. The residual stress of the laser cladding coating increases obviously with the increase of the thickness of the single cladding layer. The residual stress increases by nearly 40% since the thickness of single cladding layer increases from 0.6 mm to 1 mm. Compared with the residual stress in the case where the two cladding layers are in the same scanning direction, the residual stress of coating decreases obviously when the overlaying sequence of two layers of cladding layer is perpendicularly crossed. And the lowest residual stress can be obtained when the surface of the test plate is cladded in zones and the multi-layer cladding layer in each zone are vertically cross-surfacing. A certain pre-deformation of the test plate before cladding has little effect on the final residual stress of the coating, but significantly reduces the residual stress on the back of the test plate.
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    • 参考文献(10)
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  • 收稿日期:  2018-05-08

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