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材料工程  2020, Vol. 48 Issue (3): 163-169    DOI: 10.11868/j.issn.1001-4381.2019.000131
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
机械滚压对A473M钢疲劳性能的影响
刘也川1, 张松1, 谭俊哲2, 关锰2, 陶邵佳2, 张春华1
1. 沈阳工业大学 材料科学与工程学院, 沈阳 110870;
2. 沈阳鼓风机集团 核电泵业有限公司, 沈阳 110869
Effect of mechanical rolling on fatigue properties of A473M steel
LIU Ye-chuan1, ZHANG Song1, TAN Jun-zhe2, GUAN Meng2, TAO Shao-jia2, ZHANG Chun-hua1
1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;
2. Nuclear Power Pump Industry Co., Ltd., Shenyang Blower Works Group Corporation, Shenyang 110869, China
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摘要 采用机械滚压对A473M马氏体不锈钢轴套材料进行表面处理,研究滚压工艺对其力学性能的影响。采用SEM、白光干涉仪、X射线衍射仪、显微硬度计、EBSD、拉伸试验机和疲劳试验机分别对试样表面形貌、表面粗糙度、残余应力、显微硬度、拉伸性能和疲劳性能进行系统表征。结果表明:滚压加工试样表面的粗糙度明显降低,仅为车削加工的1/5;滚压加工在材料近表面引入残余压应力,其值最高可达946 MPa,沿深度方向逐渐减小,残余压应力层深度约为200 μm,表面硬度提高30%左右,硬度影响层深度可达200 μm;抗拉强度、屈服强度和伸长率分别提升了40%,22%和8%,疲劳寿命由基体材料的5.4×104周次提高到1×107周次。采用滚压加工后材料的力学性能明显提升,疲劳寿命显著增加。
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刘也川
张松
谭俊哲
关锰
陶邵佳
张春华
关键词 滚压力学性能残余应力拉伸性能疲劳寿命    
Abstract:The surface treatment was carried out on the surface of materials of A473M martensitic stainless steel axle sleeve by rolling technology, aiming to investigate the effect on its mechanical properties. The surface morphology and roughness, residual stress, microhardness, tensile and fatigue property were systematically studied using the SEM, white light interferometer, X-ray diffractometer, microhardness tester, EBSD, tensile tester and fatigue tester. The results show that the surface roughness of rolling specimen reduces significantly, which is about 1/5 of that of turning surface. The residual compression stress is induced near surface by rolling processing, the maximum value can reach up to 946 MPa and the residual compression stress decreases along with the depth. The thickness of the residual compression stress layer is about 200 μm. In addition, the rolling surface microhardness can be improved by 30% compared with that of turning surface and the hardened layer can be about 200 μm. As for mechanical properties, the tensile strength, yield strength and elongation of rolling specimens increase about 40%, 22% and 8% respectively compared with that of turning specimens. The fatigue life increases from 5.4×104 cycles to 1×107 cycles after rolling processing. The mechanical properties of the rolled material significantly improve, and the fatigue life significantly increases.
Key wordsrolling    mechanical property    residual stress    tensile property    fatigue life
收稿日期: 2019-02-19      出版日期: 2020-03-18
中图分类号:  TG142.1+2  
通讯作者: 张松(1963-),女,教授,博士,主要从事激光增材制造及材料表面工程方面的工作,联系地址:辽宁省沈阳市沈阳经济技术开发区沈辽西路111号沈阳工业大学材料学院(110870),E-mail:songzhang_sy@163.com     E-mail: songzhang_sy@163.com
引用本文:   
刘也川, 张松, 谭俊哲, 关锰, 陶邵佳, 张春华. 机械滚压对A473M钢疲劳性能的影响[J]. 材料工程, 2020, 48(3): 163-169.
LIU Ye-chuan, ZHANG Song, TAN Jun-zhe, GUAN Meng, TAO Shao-jia, ZHANG Chun-hua. Effect of mechanical rolling on fatigue properties of A473M steel. Journal of Materials Engineering, 2020, 48(3): 163-169.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000131      或      http://jme.biam.ac.cn/CN/Y2020/V48/I3/163
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