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研究了机械传动丝杠用ZG30CrMnSiMoTi钢的淬火工艺。结果表明,当感应加热温度稍高于A_(c3)时可得到细小的马氏体组织。随着加热速率增加,ZG30CrMnSiMoTi钢奥氏体化完成所需时间越来越短,该钢种的奥氏体化起始与完成温度与加热速率成正比。传动部件在单感应圈感应加热时厚度方向上存在着温度梯度,这在随后的冷却过程中将会导致淬硬层硬度不均匀分布和应力开裂;双感应圈感应加热后完全奥氏体化厚度大,且沟道端部和底部之间温度接近,在端部淬火时残余应力很小、无裂纹产生。
The quenching process of ZG30CrMnSiMoTi steel for mechanical transmission screw was studied. The results show that when the induction heating temperature slightly higher than the A_ (c3) can be obtained when the small martensite. As the heating rate increases, the austenitizing time for the ZG30CrMnSiMoTi steel becomes shorter and shorter. The initial austenitization of the steel species is proportional to the completion temperature and the heating rate. There is a temperature gradient in the thickness direction of the transmission components during the induction heating of a single induction coil, which leads to uneven hardness distribution and stress cracking of the hardened layer in the subsequent cooling process. The fully austenitized thickness Large, and the temperature between the end of the channel and the bottom close to the end of the quenching residual stress is small, no cracks.