改善42CrMo钢硬度与耐磨性的研究

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，cr含量可达到1．51％，硬度46．8HRC，磨损率0．214．同时，综合提高了合金元素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

The alloying elements of Mn, Cr, Mo, Nb were added into the 42CrMo steel, followed by heat treatments of annealing, oil quenching and tempering. When the tempering temperature was 380 ℃ ,the hardness and wear resistance were improved with increasing the content of every alloying element. When the mass fraction of Cr was 1.51% ,the hardness was 46.8HRC and the wear rate was 0.214. When the content of alloying elements were comprehensively improved and the tempering temperature was 350 ℃, the effect of Nb on hardness and abrasion resistance was clearly more than that of Mo. However, when the tempering temperature was 410 ℃, Mo was clearly more effective than Nb. While the mass fraction of Mn, Cr, Mo, Nb was 0.60% , 1.40% ,0.30% and 0.07% , respectively, and under the tempering temperature of 410 ℃, the hardness of 42CrMo steel was 46.2HRC and the wear rate was 0.216.