感应淬火工艺参数对30MnB5钢板显微组织与力学性能的影响

Effects of Induction Quenching Process Parameters on Microstructure and Mechanical Properties of 30MnB5 Steel Plate

采用显微硬度测试、室温拉伸试验与显微组织观察分析,研究了中频感应淬火工艺参数对30MnB5钢板显微组织与力学性能的影响。结果表明:电源电压与工件移动速度对30MnB5感应淬火工艺处理后的力学性能影响显著。随着电压的升高与移动速度的降低,材料强度与硬度均得到明显提升,但塑性下降较快。经感应淬火处理后,30MnB5显微组织由初始的铁素体+珠光体组织转变为马氏体组织。根据强塑积计算结果,30MnB5最佳感应淬火工艺参数为电源电压480 V,移动速度400 mm/min。该工艺参数下,强塑积达最大(20755 MPa·%),综合力学性能最佳。

Effects of medium frequency induction quenching process parameters on the microstructure and mechanical properties of 30MnB5 steel plate were studied by means of microhardness test, room temperature tensile test and microstructure observation. As a result, the power supply voltage and the moving speed of the workpiece have a significant effect on the mechanical properties of 30MnB5 after induction quenching process. With the increase of voltage and the decrease of moving speed, the strength and hardness of the material are obviously improved, but the plasticity decreases rapidly. After induction quenching, the microstructure of 30MnB5 changes from the initial ferrite+pearlite to martensite. The optimum induction quenching process parameters for 30MnB5 are 480 V power supply voltage, 400 mm/min moving speed according to the calculation results of strong plastic volume. According to the process parameters, the strong plastic product reaches the maximum(20755 MPa·%), and the comprehensive mechanical properties are the best.