中国机械工程 ›› 2015, Vol. 26 ›› Issue (7): 949-954.

• 机械基础工程 • 上一篇    下一篇

小切深磨削条件下工件表面硬化机理

张修铭1;于永涛2;白斌1,3;修世超1   

  1. 1.东北大学,沈阳,110819
    2.中航工业沈阳发动机设计研究所,沈阳,110819
    3.沈阳工程学院,沈阳,110136
  • 出版日期:2015-04-10 发布日期:2015-04-24
  • 基金资助:
    国家自然科学基金资助项目(51375083);沈阳市科学技术计划资助项目(F13-316-1-59)

Surface Hardened Mechanism of Grinding Conditions in Small Depth of Cut

Zhang Xiuming1;Yu Yongtao1;Bai Bin2;Xiu Shichao1   

  1. 1.Northeastern University,Shenyang,110819
    2.AVIC Shenyang Engine Design and Research Institute,Shenyang,110819
    3.Shenyang Institute of Engineering,Shenyang,110136
  • Online:2015-04-10 Published:2015-04-24
  • Supported by:
    National Natural Science Foundation of China(No. 51375083)

摘要:

以位错运动造成塑性变形的理论为基础,深入分析了小切深条件下磨削力机械作用硬化机理和材料热相变硬化机理。通过不同磨削参数的小切深磨削硬化试验,分析磨削硬化过程中不同磨削参数条件对工件表面强化层形成的影响及其金相组织转变的情况,深入研究磨削强化层组织的形成机理。试验结果表明,小切深条件下磨削加工试件表面的硬化主要以位错运动而产生的强化层为主,提高磨削深度和降低工件进给速度会增大工件表面显微残余应力,增强试件表层硬化层的形成效果。

关键词: 磨削机理, 硬化, 温度场, 位错硬化, 预测

Abstract:

Grinding hardening technology was the technology that made the surface layer of the work-piece hardened by using grinding force and grinding heat. Grinding surface hardening process in small depth cut was usually generated by mechanical force and accompanied with thermal strain and phase transition occurred. Based on the theory of plastic deformation caused by dislocation motion, in-depth analyzed the hardening mechanism of mechanical action by grinding force and material thermal phase transformation in small depth cut. Test shows that using larger grinding depth and smaller workpiece feed speed in the grinding can increase the surface microscopic residual stress and promote the effect of the specimen surface hardening layer formation.

Key words: grinding mechanism, hardening, temperature field, dislocation hardening, prediction

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