40Cr钢的磨削淬硬层与磨削参数的关系  

The Relationship between Grinding Parameters and Grinding-hardened Layer of 40Cr Steel

作　　者：杨刚[1] 韩正铜[1] 杜长龙[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221008

出　　处：《矿冶工程》2008年第1期84-87,共4页Mining and Metallurgical Engineering

基　　金：中国矿业大学科技基金资助项目(2006B009)

摘　　要：针对矿山机械常用材料之-40Cr钢应用了磨削淬火技术，并在试验中改变磨削用量以研究材料的淬硬层情况。试验后对试件进行金相组织观测，发现可得到一定厚度的马氏体；进行硬度值测量发现：在变进给情况下，强化层厚度为1．2-1．4mm，硬度值平均为HV760（HRC62），淬硬厚度随着进给速度减少而增加；在变切深情况下，强化层厚度为0．8—1．6mm，硬度值平均为HV700（HRC60），淬硬厚度随着切深的增加先增大后减少。两种手段得到的淬硬层硬度均远远高于基体硬度值HV255（HRC23），证明了该种新技术经济实用，效果良好，并且宜采用缓进给的方式进行。Grinding-hardening technique is applied to 40Cr steel which is one of the commonly used materials. In the test the grinding parameters are varied so as to investigate the hardened layer of the material. The observation of the metallographic structure of the sample shows that there forms a martensite layer with certain thickness. It is found from the hardness test that the hardened layer has an average hardness of HV760 （HRC62） and a thickness of 1.2 - 1.4 mm which increases with the decrease of the feeding speed under the condition of varying the speed, and an average hardness of HV700 （HRC60） and a thickness of 0.8 - 1.6 mm which first increases and then decreases with the increase of cutting depth under the condition of varying the depth. Both of the hardness values are much higher than the matrix hardness of HV255 （ HRC23 ）. It proves the feasibility and effectiveness of the grinding-hardening technique, for which low feeding is suitable.

关 键 词：40CR钢 磨削强化 表面淬火 磨削加工 

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]