| 激光处理高强度钢板CCT试件裂纹尖端的研究 |
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| 引用本文： | 李再光,郑启光,李光霞,黄培彦,李家镕,李适民,李长春. 激光处理高强度钢板CCT试件裂纹尖端的研究[J]. 中国激光, 1984, 11(11): 673-679 |
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| 作者姓名： | 李再光 郑启光 李光霞 黄培彦 李家镕 李适民 李长春 |
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| 作者单位： | 华中工学院(李再光，郑启光，李光霞，黄培彦，李家镕，李适民)，华中工学院(李长春) |
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| 摘 要： | 本文探讨用大功率CO_2激光处理25CrMnSi钢板CCT试件的裂纹端部,对比激光处理的试件与未处理试件的结果表明,激光处理后能提高ΔK_(th),提高疲劳寿命2倍以上,能降低da/(dN)。通过对试件的微观组织分析和微观硬度测量,找出了激光热处理高强度钢板的初步激光热处理规范,并对试验结果进行了统计分析,得到了疲劳裂纹扩展循环数N与激光处理参数的近似关系式。
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| 收稿时间： | 1983-12-05 |
Laser treatment of end-cleavage of high strength steel CCT samples |
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| Abstract: | The end-cleavage of 25CrMnSi steel CCT samples treated by a high-power CW CO2 laser are investigated for improving the miorostructure of the material, changing the stress distribution of the end-cleavage and enhancing the performances of the fatigue failure resistance of the material. It has been shown that △Kth of the materials is increased, the fatiguelifetime is prolonged by over two times and is reduced after laser treatment. The approximate empiric formula is obtained relating the cycle number N of the fatigue crack spread to the laser treatment parameters by means of statistic analysis of the experimental data. |
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