P20钢电火花成形加工表层的组织结构和性能

材料研究学报, 2013, 27(5): 449-453.

P20钢电火花成形加工表层的组织结构和性能

1.北京工业职业技术学院北京 100042

2.中电投核电技术中心北京 100044;清华大学工程力学系北京100084

3.清华大学工程力学系北京100084

4.清华大学工程力学系北京100084

基金项目: 国家重点基础研究发展计划2011CB610506和北京市教育委员会科研计划KM201310853006资助项目.Supported by Key Basic Research and Development Program of China No.2011CB610506,and the Scientific Research Program of Beijing Municipal Commission of Education No.KM201310853006

关键词：金属材料 , 模具钢 , 电火花成形 , 脉冲电流 , 显微硬度 , 残余应力

Micro Structures and Properties of the Surface with Electrical Discharge Machining for P20 Steel

Keywords： metallic materials , die steel , electrical discharge machining , pulse current , micro hardness , residual stress

在不同脉冲电流条件下对模具钢P20进行电火花成形加工,研究了脉冲电流对试样表层的微观组织结构的影响,以及微观组织结构对表面性能的影响.结果表明,电火花成形加工后试样的表面分为烧蚀层、熔化凝固层和热影响层.随着脉冲电流的增大,熔化凝固层和热影响层的厚度增大;在加工过程中元素的扩散和迁移使熔化凝固层外侧碳元素和氧元素的浓度较高.电火花成形加工过程相当于热处理过程,从熔化凝固层到热影响层、基体,显微硬度快速降低.有限元模拟计算表明,在熔化凝固层内的垂直与界面微裂纹主要是加工放热过程中的残余应力引起的.

参考文献

[1]	K.H.Ho,S.T.Newman,S.Rahimifard,R.D.Allen,State of the art in wire electrical discharge machining (WEDM),International Journal of Machine Tools & Manufacture,44,1247(2004)
[2]	D.W.Heard,M.Brochu,Development of a nanostructure microstructure in the Al-Ni system using the electrospark deposition process,Journal of Materials Processing Technology,210,892(2010)
[3]	J.T.Huang,Y.S.Liao,W.J.Hsue,Determination of finish-cutting operation number and machining-parameters setting in wire electrical discharge machining,Journal of Materials Processing Technology,87,69(1999)
[4]	ZHU Shigen,DI Ping,GU Weisheng,SHEN Jian,WU Helong,Microstructure and properties of electrospark surface strengthening layers,Material Science and Technology,3,315(2003)(朱世根,狄平,顾伟生,沈剑,吴贺龙,电火花表面强化层组织结构和性能的研究,材料科学与工艺,3,315(2003)
[5]	S.Frangini,A.Masci,A.Di Bartolomeo,Cr7C3-based cermet coating deposited on stainless steel by electrospark process:Structural characteristics and corrosion behavior,Surface and Coatings Technology,149,279(2002)
[6]	ZHAO Huiyou,QU Jingxin,CHEN Huahui,LIU Zhiwei,ZHANG Zhuwei,Corrosion characteristics of several electrospark-cladd coatings,Corrosion Science and Protection Technology,18(2),104(2006)(赵会友,曲敬信,陈华辉,刘志伟,张祝伟,几种电火花熔涂层的腐蚀性能研究,腐蚀科学与防护技术,18(2),104(2006)
[7]	GUO Zhunqin,WANG Chengwen,The influence factors of machining speed in EDM,Machine Tool & Hydraulics,40(8),191(2012)(郭谆钦,王承文,电火花加工中加工速度的影响因素,机床与液压,40(8),191(2012))
[8]	PEI Shunjie,ZHANG Yunpeng,HOU Zhongbin,Research on parameter optimization of EDM process for W6Mo5Cr4V2,Electromachining & Mould,3,17(2012)(裴顺杰,张云鹏,侯忠滨,W6Mo5Cr4V2电火花加工工艺参数优选研究,电加工与模具,3,17(2012))
[9]	JIANG Dongmei,Experimental study of effects of machining parameters on surface roughness in electrical discharge machining,Machinery,48(556),79(2010)(蒋冬梅,电火花加工中测量加工参数对表面粗糙度影响的实验研究,机械制造,48(556),79(2010))
[10]	WANG Hongxiang,ZHANG Xu,GAO Shi,LIU Zhanshan,The friction and wear properties of strengthening layer in EDM of stainless steel 1Crl 3,Materials Science and Technology,3(19),56(2011)(王洪祥,张旭,高石,刘占山,1Crl3不锈钢电火花表面强化层摩擦磨损性能研究,材料科学与工艺,3(19),56(2011))
[11]	Brian K.Rhoney,Albe J.Shih,Ronald O.Scattergood,Ronald Ott,Samuel B.McSpadden,Wear mechanism of metal bond diamond wheels trued by wire electrical discharge machining,Wear,252,644 (2002)
[12]	M.A.Bejar,W.Schnake,W.Saavedra,J.P.Vildosola,Surface hardening of metallic alloys by electrospark deposition followed by plasma nitriding,Journal of Materials Processing Technology,176,210(2006)

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网