40Cr钢磨削淬硬层残余应力的试验研究  

Study on residual stresses in grind-hardened layer of 40Cr steel

作　　者：刘菊东[1] 侯达盘[1] 

机构地区：[1]集美大学机械工程学院,福建厦门361021

出　　处：《金属热处理》2008年第8期127-130,共4页Heat Treatment of Metals

基　　金：福建省自然科学基金(E0640011);福建省教育厅科技项目(JA07144);集美大学优秀青年骨干教师基金(2006B004)

摘　　要：以平面磨削淬硬加工试验为基础,利用X射线应力测定仪对40Cr钢磨削淬硬层残余应力进行了研究。结果表明,磨削淬硬层表面均存在残余压应力,次表层出现最大残余压应力。随着磨削速度的提高、磨削深度的增加或工件进给速度的降低,磨削淬硬层表面残余压应力值相应减小,但最大残余压应力和应力作用深度相应增加。采用单程干式磨削淬硬可增加淬硬层的最大残余压应力及应力作用深度。On the basis of the surface grinding-hardening test, the residual stress in the grind-hardened layer of 40Cr steel was studied. The results show that the compressive residual stresses is existing in the surface of grind-hardened lay- er, the maximal compressive residual stress is existing in the subsurface. When the grinding speed and grinding depth in- crease, or feed speed decreases, the compress residual stresses of the surface decrease accordingly, whereas maximal compressive residual stress and the action depth of stress increase accordingly. Using single-pass and dry-grinding mode can increase the maximal compressive residual stresses and the action depth of stresses.

关 键 词：磨削 表面淬硬 残余应力 应力作用深度 

分 类 号：TG156.33[金属学及工艺—热处理] TG580.64[金属学及工艺—金属学]