.
峰山，赵文广，安胜利
（内蒙古科技大学材料与冶金学院，内蒙古包头 014010）
关键词：42CrMo钢；合金元素；硬度；耐磨性
中图分类号：TG135+.1 文献标志码：A
摘要：将合金元素Mn、Cr、Mo、Nb 加入42CrMo钢中熔炼后，选择退火、油淬及回火的热处理方式。回火温度为
380
℃
时，提高单个合金元素的百分含量时，Cr含量1.51%，硬度达到46.8HRC，磨损率0.214。同时，综合提高合金元素Mn、Cr、Mo、Nb的含量，回火温度
350
℃
，Nb对42CrMo的硬度和耐磨性的影响比Mo明显，而回火温度
410
℃
时，Mo的影响更为明显。合金元素Mn、Cr、Mo、Nb质量分数分别为0.60%、1.40%、0.30%、0.07%时，回火温度为
410
℃
，42CrMo钢的硬度达到46.2HRC，磨损率0.216。
Study on the Improvement in Hardness and
Abrasion Resistance of 42CrMo Steel
FENG-Shan, ZHAO Wen-guang, AN Sheng-li
（Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010, China）
Key words: 42CrMo steel; alloying elements; hardness; abrasion resistance
Abstract:
The alloying elements of Mn
、
Cr
、
Mo
、
Nb were added into the 42CrMo steel, the follow heat treatments were annealing, oil quenching and tempering. If the tempering temperature was
380
℃
，
when the content of every alloying element was increased, for example Cr content was 1.51%, the hardness was 46.8HRC and the wear rate was 0.214. When the content of alloying elements were comprehensively improved, if the tempering temperature was
350
℃
, Nb for hardness and abrasion resistance was clearly more effective than that of Mo. While, if the tempering temperature was
410
℃
, Mo was clearly more effective than Nb. When the mass fraction of Mn
、
Cr
、
Mo
、
Nb was 0.60%,1.40%,0.30% and 0.07% respectively, and the tempering temperature was
410
℃
, the hardness of 42CrMo steel was 46.2HRCand the wear rate was 0.216.
