| 194 | 2 | 10 |
| 下载次数 | 被引频次 | 阅读次数 |
高速切削过程中,在热力耦合综合作用下,加工表面会产生白层;白层有较高脆性易形成裂纹,引起早期剥落失效或成为疲劳源,对工件的使用性能和寿命都有很大影响。本文以40CrNiMoA为研究对象,利用单一变量法进行高速切削试验,对加工表面进行金相分析,研究白层的微观特性。研究结果表明:进给量对白层厚度影响最大;工件已加工表面白层厚度增加会使工件表面粗糙度增加。
Abstract:In the process of high-speed cutting, white layer will be produced on the machined surface under the comprehensive action of thermal mechanical coupling.The white layer has high brittleness, easily to form cracks, cause early peeling failure or become a fatigue source, which has a great impact on the service performance and life of the workpiece.In this paper, 40 CrNiMoA is taken as the research object, the high-speed cutting test is carried out by using the single variable method, the metallographic analysis of the machined surface is carried out, and the micro characteristics of the white layer are studied.The results show that the feed rate has the greatest influence on the white layer thickness; In addition, the increase of the thickness of the white layer on the machined surface of the workpiece will increase the surface roughness of the workpiece.
[1] 陈涛,刘献礼,李素燕,等.高速硬切削加工表面白层形成机理研究[J].机械工程学报,2015,51(23):182-188.
[2] 段春争,张方圆,徐欣欣.高速切削淬硬钢已加工表面白层形成规律研究[J].大连交通大学学报,2016,37(6):21-25,30.
[3] 刘战强,吕绍瑜.镍基粉末高温合金切削加工表面白层形成热-力耦合作用机理[J].机械工程学报,2014,50(17):186-193.
[4] Ramesh A,Melkote S N,Allard L F.Analysis of white layers formed in hard turning of AISI 52100 steel[J].Materials ence & Engineering A,2005,390(1/2):88-97.
[5] Huang X,Zhou Z,Ren Y.Experimental research material characteristics effect on white layers formation in grinding of hardened steel[J].International Journal of Advanced Manufacturing Technology,2013,66(9-12):1555-1561.
[6] Cho D H,Lee S A,Lee Y Z.Mechanical properties and wear behavior of the white layer[J].Tribology Letters,2012,45(1):123-129.
[7] 王志敏.20CrMnTi淬硬钢硬态切削与表面完整性研究[D].厦门:厦门理工学院,2021.
[8] 任小平.高温合金GH4169车削加工表面完整性及抗疲劳加工工艺研究[D].济南:山东大学,2019.
[9] 张凌飞,张弘弢.高硬金属加工过程中表面白层的研究[J].工具技术,2004,38(2):13-16.
[10] 段春争,寇文能,张方圆.高速干硬切削表面白层相变元胞自动机模拟[J].工具技术,2019,53(2):22-27
[11] 段春争,张方圆,寇文能,等.高速硬切削表面白层马氏体相变[J].吉林大学学报:工学版,2019,49(5):1575-1583.
[12] 王晨羽,李金泉.基于动态力学模型分析的钛合金切削过程进给量对表面质量的影响规律[J].表面技术,2019,48(6):370-375.
[13] 孙鹏,淬硬钢导电加热切削技术基础研究[D].大连:大连理工大学,2005.
[14] 王晨羽,徐碧聪,颜世晶,等.工业纯钛切削过程表面三维形貌研究[J].沈阳理工大学学报,2018,37(4):57-61.
基本信息:
中图分类号:TG506
引用信息:
[1]张岩,李金泉.金属切削表面白层厚度影响因素分析[J].沈阳理工大学学报,2022,41(02):65-69.
基金信息:
国家自然科学基金资助项目(51775357)
2022-04-15
2022-04-15