摘要
以常用的Al2O3-TiC(质量分数30%)为例，研究陶瓷材料电加工表面残余应力和变质层厚度。通过试验分析，结果表明电加工后工件表面残余应力均为拉应力，表面变质层组织疏松，强度较差，厚度一般为50～100 μm。表面残余拉应力和变质层厚度都随脉冲能量(脉冲宽度、功率管数)的增加而加大，随脉冲间隔增加而减小。电加工时所用的工作液种类对加工质量也有一定影响。
The widely-used Al2O3-TiC(30%) as sample is utilized to study the remnant surface stress and the thickness of the decaying layer after ceramics is machined with electrical charges. The result of experiments done indicates that the remanant surface stress of ceramic materials after electrical machining is tension stress, and the decaying layer of the surface and the thickness of the decaying layer will increase with the incresase of pulse energy (pulsewidth,the number of power transistors)whereas decrease with the increase of interval b etween two pulses.The emulsion used in the process of electrical discharge machining also exercise influence on machining qualiy.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2000年第11期75-79,83,共6页
Journal of Mechanical Engineering
关键词
电加工
表面变质层
工程陶瓷
表面质量
残余应力
Electrical discharge machining
Electrical discharge machining parameter
Emulsion Remannt surface stress
Decaying layer of the
surface
