采用感应加热淬火加电炉高温回火的方式对规格为45 mm的42CrMo钢棒材进行了调质处理,并通过3种不同的工艺对比分析了加热温度、冷却强度、均热时间等工艺参数对棒材力学性能和微观组织的影响。分析结果显示,42CrMo棒材经900℃感应加热、均热60 s淬火、570℃电炉回火后,显微组织均匀细小,回火索氏体含量较高,综合性能最好。 Adopting the methods of induction heating and electric furnace tempering, the 42CrMo steel bar with the size of  45 mm was tempered and tempered. The process parameters of heating temperature, cooling intensity, soaking time and so on were analyzed and compared through three different processes Effect on Mechanical Properties and Microstructure of Bar. The analysis results show that the 42CrMo bar is induction heated at 900 ℃, soaking in soak at 60 s, tempering at 570 ℃ in EAF, the microstructure is fine and the content of tempered sorbite is high, and the comprehensive performance is the best.