| 汽轮机叶片的激光合金化与激光淬火 |
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| 引用本文： | 姚建华,于春艳,孔凡志,楼程华,孙东跃.汽轮机叶片的激光合金化与激光淬火[J].动力工程,2007,27(4):652-656. |
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| 作者姓名： | 姚建华 于春艳 孔凡志 楼程华 孙东跃 |
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| 作者单位： | 1. 浙江工业大学,机械制造及自动化教育部重点实验室
2. 浙江工业大学,激光加工技术工程研究中心,杭州,310014 |
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| 基金项目： | 浙江省国际科技合作计划
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杭州市重点科技创新项目 |
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| 摘 要： | 对调质态2Cr13低碳马氏体不锈钢汽轮机叶片,采用7 kW的CO2横流激光器分别进行激光合金化和激光淬火,考察其显微组织和力学性能.结果显示:激光处理后,在表面硬度方面,激光淬火提高了110%倍左右,激光合金化提高了180%左右;在残余应力分布上,激光淬火增加了表面的残余压应力,激光合金化将使残余压应力转变为残余拉应力.在综合性能上,激光合金化具有更高的优势,在叶片强化上具有更好的发展前景.
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| 关 键 词： | 材料科学 合金化与淬火 激光 叶片 残余应力 |
| 文章编号： | 1000-6761（2007）04-652-05 |
| 修稿时间： | 2006-11-06 |
Laser Alloying and Quenching of Steam Turbine Blades |
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| YAO Jian-hua,YU Chun-yan,KONG Fan-zhi,LOU Chen-hua,SUN Dong-yue.Laser Alloying and Quenching of Steam Turbine Blades[J].Power Engineering,2007,27(4):652-656. |
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| Authors: | YAO Jian-hua YU Chun-yan KONG Fan-zhi LOU Chen-hua SUN Dong-yue |
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| Abstract: | Some steam turbine blades,made of tempered 2 Cr13 low carbon martensitic stainless steel,are first either laser alloyed with a 7 kW laser processer,and then subjected to microstructure and mechanical property examinations.Results show that the surface' hardness are respectively raised 110% by quenching and 180% by alloying;on the other hand,surface residual compressive stress is increased by laser quenching,but is completely converted into residual tensile stress by laser alloying.Comprehensively considering the effect on property,laser alloying has its superiority and therefore brighter prospects in blade strengthening applications. |
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| Keywords: | material science alloying and quenching laser blade residual stress |
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