| 碳钢件表面裂纹缺陷激光修复研究 |
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| 引用本文： | 叶和清,王忠柯,许德胜,左都罗,黄素逸,苏雪峰.碳钢件表面裂纹缺陷激光修复研究[J].中国激光,2001,28(11):1045-1048. |
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| 作者姓名： | 叶和清 王忠柯 许德胜 左都罗 黄素逸 苏雪峰 |
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| 作者单位： | 1. 华中科技大学
2. 华中科技大学动力系 |
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| 基金项目： | 国家自然科学基金 (5 990 6 0 0 4)，激光技术国家重
点实验室对外开放基金资助项目 |
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| 摘 要： | 采用双光束激光修复碳钢零件的表面裂纹。裂纹修复区堆焊层与零件基体间存在一明显的白色熔合结合带 ,组织结构中存在联生的胞晶组织及树枝状、针状组织。枝晶为先析出相γ Ni,固溶有大量的Cu和Fe ;枝晶间隙除低熔点金属外 ,含有γ Ni,NiSi2 ,Cr3 Ni2 ,CrSi。修复区送料堆焊层的硬度明显高于碳钢基体的硬度 ,约在HV0 .2 40 0～HV0 .2 45 0 ,随后由堆焊层到过渡区逐渐降低
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| 关 键 词： | 碳钢零件 表面裂纹 激光修复 组织结构 |
| 收稿时间： | 2000/7/26 |
Study on the Laser Repairing Surface Crack of Steel Components |
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| YE He qing,WANG Zhong ke,XU De sheng,ZUO Dou luo,HUANG Su yi,SU Xue feng.Study on the Laser Repairing Surface Crack of Steel Components[J].Chinese Journal of Lasers,2001,28(11):1045-1048. |
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| Authors: | YE He qing WANG Zhong ke XU De sheng ZUO Dou luo HUANG Su yi SU Xue feng |
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| Institution: | YE He qing 1 WANG Zhong ke 1 XU De sheng 1 ZUO Dou luo 1 HUANG Su yi 2 SU Xue feng 2 |
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| Abstract: | Surface crack of steel components was repaired with two bundle of laser. There was an obvious joined band between filled region and substrate of component. The microstructures of repaired region were adnate cellular crystal, dendrite crystal, and needleshaped crystal. The phases of dendrite crystal in repaired region were consisted of γ Ni which contained plenty of Cu, Fe. The phases in the gaps among dendrite crystals wereγ Ni, NiSi 2, Cr 3Ni 2, CrSi. The hardness of filled layer in repaired region were HV 0.2 400～HV 0.2 450, then the hardness values decreased from the surface to transition region. |
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| Keywords: | steel components surface crack laser repairing microstructure |
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