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材料工程  2018, Vol. 46 Issue (7): 127-135    DOI: 10.11868/j.issn.1001-4381.2016.000961
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
20钢强流脉冲电子束表面合金化的微观组织和性能
郑欢欢1, 刘鑫禹1, 陈亚楠1, 张从林1, 吕鹏1, 蔡杰2, 关庆丰1
1. 江苏大学 材料科学与工程学院, 江苏 镇江 212013;
2. 江苏大学 先进制造与现代装备技术工程研究院, 江苏 镇江 212013
Microstructure and Properties of High Current Pulsed Electron Beam Surface Alloying on 20 Steel
ZHENG Huan-huan1, LIU Xin-yu1, CHEN Ya-nan1, ZHANG Cong-lin1, LYU Peng1, CAI Jie2, GUAN Qing-feng1
1. School of Material Science & Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
2. Engineering Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang 212013, Jiangsu, China
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摘要 为改善20钢件的表面性能,利用强流脉冲电子束(HCPEB)技术与预置涂层相结合的技术在20钢表面合金化Cr元素以获得高性能的合金复合改性层。利用X射线衍射、金相显微镜、扫描电子显微镜、透射电子显微镜、维氏硬度计以及多功能微机电化学分析仪对合金化层的显微组织以及性能进行研究。结果表明:20钢经过HCPEB辐照合金化后,形成了厚度约为4~6μm的合金化改性层,Cr元素在样品表层发生了固溶和扩散。部分渗碳体在辐照诱发的应力作用下出现弯折、粒化等现象,并在基体溶解与Cr结合析出颗粒细小弥散的Cr23C6增强相。HCPEB辐照合金化后材料表层显微硬度提高了35%,腐蚀电流密度降低了1个数量级。
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郑欢欢
刘鑫禹
陈亚楠
张从林
吕鹏
蔡杰
关庆丰
关键词 电子束合金化表面强化微观组织显微硬度耐蚀性    
Abstract:To improve the surface properties of 20 steel, the chromium element was alloyed on 20 steel by high current pulsed electron beam (HCPEB) with pre-coating to obtain a high quality of alloyed layers.Microstructure and properties of the alloying layer were studied by means of XRD, OM, SEM, TEM and multi-purpose microcomputer electrochemistry analyzer. The results show that, after HCPEB alloying, the formation of an alloyed layer with the depth of about 4-6μm on the surface is observed. The solid solution and diffusion of Cr element occurs on the surface of the substrate.Bending and granulating occur on part of cementite under bending stress induced by HCPEB irradiation, the C atoms generated by the dissolution of the cementite combine with the chromium to form a small amount of nanograined carbide Cr23C6. After HCPEB alloying, the surface microhardness increases by 35% and corrosion current density reduces one order of magnitude than original sample.
Key wordsalloyed electronic beam    surface strengthening    microstructure    micro-hardness    corrosion resis-tance
收稿日期: 2016-08-10      出版日期: 2018-07-20
中图分类号:  TB31  
通讯作者: 关庆丰(1963-),男,教授,博士生导师,主要从事载能束表面改性技术及微结构方面研究工作,联系地址:江苏省镇江市京口区学府路301号江苏大学材料科学与工程学院(212013),E-mail:guanqf@ujs.edu.cn     E-mail: guanqf@ujs.edu.cn
引用本文:   
郑欢欢, 刘鑫禹, 陈亚楠, 张从林, 吕鹏, 蔡杰, 关庆丰. 20钢强流脉冲电子束表面合金化的微观组织和性能[J]. 材料工程, 2018, 46(7): 127-135.
ZHENG Huan-huan, LIU Xin-yu, CHEN Ya-nan, ZHANG Cong-lin, LYU Peng, CAI Jie, GUAN Qing-feng. Microstructure and Properties of High Current Pulsed Electron Beam Surface Alloying on 20 Steel. Journal of Materials Engineering, 2018, 46(7): 127-135.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000961      或      http://jme.biam.ac.cn/CN/Y2018/V46/I7/127
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