冷却方式对磨削淬硬加工层性能影响的实验研究  

Experimental Study on Effect of Cooling Methods on Performance of Grinding-hardened Layer

作　　者：李雪[1,2] 陈静 王贵成 LI Xue;CHEN Jing;WANG Guicheng(Department of Equipment Support,Zhenjiang Watercraft College,Zhenjiang 212003,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]镇江船艇学院装备保障系,江苏镇江212003 [2]江苏大学机械工程学院,江苏镇江212013

出　　处：《热加工工艺》2018年第16期184-187,192,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51075192)

摘　　要：在平面磨床上对AISI1045钢进行了磨削淬硬处理,研究了乳化液、干燥空气和液态氮等三种不同冷却介质对磨削淬硬层组织和性能的影响。结果表明,采用乳化液冷却时,试件表层组织为珠光体,无淬硬层,表面粗糙度数值小,表层残余应力为压应力;采用液态氮和干燥空气冷却时,试件表层均被淬硬,组织均为马氏体,表面粗糙度变化不大,但使用液态氮冷却获得的硬度高,且表层应力为压应力;采用空气冷却获得的淬硬层深度深,表层残余应力为拉应力。The grind-hardening treatment of AISI1045 steel was carried out on a surface grinder. The effects of three different cooling mediums, such as emulsion, dry air and liquid nitrogen, on the microstructure and properties of the grindinghardened layer were studied. The results show that when using emulsion cooling, the surface layer microstruction of the specimen is pearlite, it has no hardening layer, the surface roughness value is small, and the surface residual stress is compressive stress; when using the dry air and liquid nitrogen cooling, the surface of the specimens is hardened, the microstructure is martensites, and the surface roughness is almost same, however, the hardness obtained by liquid nitrogen cooling is high, and the surface stress is compressive stress. The depth of the hardening layer obtained by air cooling is deeper,and the residual stress is tensile stress.

关 键 词：磨削淬硬 冷却方式 显微组织 硬度 残余应力 

分 类 号：TG156.32[金属学及工艺—热处理]