凸轮轴工作面点蚀坑冷焊再制造工艺与性能研究

doi:10.3976/j.issn.1002-4026.2022.05.006

山东科学 ›› 2022, Vol. 35 ›› Issue (5): 46-52.doi: 10.3976/j.issn.1002-4026.2022.05.006

凸轮轴工作面点蚀坑冷焊再制造工艺与性能研究

孙秀怀¹(), 殷子强¹^,^*(), 王守仁¹, 王磊², 吴成武², 张建鹏¹, 李重阳¹

1.济南大学机械工程学院,山东济南 250022
2.中国石油集团济柴动力有限公司,河北沧州 062650

收稿日期:2021-10-21 出版日期:2022-10-20 发布日期:2022-10-10
通信作者: 殷子强 E-mail:sxiuhuai@163.com;me_yinzq@ujn.edu.cn
作者简介:孙秀怀(1996—),男,硕士,研究方向为摩擦学设计。E-mail: sxiuhuai@163.com
基金资助:
山东省自然科学基金面上项目(ZR2020ME150);山东省重点研发计划(重大科技创新工程)(2019JZZY010452);济南市高校院所创新团队项目(2019GXRC029)

Investigation of cold-welding remanufacturing process and performance of camshaft working surface's pitting corrosion

SUN Xiu-huai¹(), YIN Zi-qiang¹^,^*(), WANG Shou-ren¹, WANG Lei², WU Cheng-wu², ZHANG Jian-peng¹, LI Chong-yang¹

1. School of Mechanical Engineering, University of Jinan, Jinan 250022, China
2. CNPC Jichai Power Company Limited, Cangzhou 062650, China

Received:2021-10-21 Online:2022-10-20 Published:2022-10-10
Contact: YIN Zi-qiang E-mail:sxiuhuai@163.com;me_yinzq@ujn.edu.cn

摘要/Abstract

摘要：

凸轮轴在服役过程中工作表面容易发生磨损,严重影响机器的正常运转。采用冷焊设备修复凸轮轴工作表面点蚀坑,通过金相显微镜观察修复区域显微组织,利用X射线残余应力测试仪、硬度测试仪表征补焊点周围的残余应力分布以及硬度分布规律。结果表明,补焊点与基体结合良好,从奥氏体中析出的碳化物弥散分布于基体组织中,补焊点位置呈现出最小的残余应力以及最小的硬度值,补焊点对于残余应力以及硬度的影响维持在补焊点中心4 mm以内。经冷焊修复后的凸轮轴满足使用性能要求。

关键词: 冷焊修复, 凸轮轴, 残余应力, 硬度

Abstract:

The working surface of a camshaft is easily worn during service, thus seriously affecting the normal operation of the machine. The pitting areas on the working surface of the camshaft were repaired using cold-welding equipment. A metallographic microscope was used to observe the microstructure of the repaired area, and the residual stress distribution and hardness distribution around the repaired areas were determined using an X-ray residual stress tester and a hardness tester, respectively. The results show that the repair welding spot is well combined with the matrix, the carbides precipitated from austenite are dispersed in the matrix structure, the position of the repair welding spot presents the minimum residual stress and the minimum hardness value, and the influence of the repair welding spot on the residual stress and hardness is maintained within around 4 mm of the repaired areas. The camshaft repaired via cold welding meets the service performance requirements.

Key words: cold-welding repair, camshaft, residual stress, hardness

中图分类号:

TG455

孙秀怀, 殷子强, 王守仁, 王磊, 吴成武, 张建鹏, 李重阳. 凸轮轴工作面点蚀坑冷焊再制造工艺与性能研究[J]. 山东科学, 2022, 35(5): 46-52.

SUN Xiu-huai, YIN Zi-qiang, WANG Shou-ren, WANG Lei, WU Cheng-wu, ZHANG Jian-peng, LI Chong-yang. Investigation of cold-welding remanufacturing process and performance of camshaft working surface's pitting corrosion[J]. Shandong Science, 2022, 35(5): 46-52.

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凸轮轴工作面点蚀坑冷焊再制造工艺与性能研究

Investigation of cold-welding remanufacturing process and performance of camshaft working surface's pitting corrosion

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