【摘要】 研究了热处理对高钒高速钢残留奥氏体、硬度、冲击韧度及磨粒磨损性能的影响,筛选了适用于磨粒磨损工况的热处理工艺。结果表明,热处理工艺对碳化钒形态分布无明显影响,但对高钒高速钢基体中奥氏体含量和耐磨性有重要影响。淬火温度越高,回火温度越低,则残留奥氏体含量越高。残留奥氏体含量在20%～40%,耐磨性最好。最佳热处理工艺为(1000～1050)℃淬火,550℃一次回火,此工艺处理后试样硬度较高,冲击韧度适中,耐磨性最好。多次回火后,高钒高速钢硬度降低,耐磨粒磨损性能下降。实际应用结果表明:经过合适热处理工艺处理后,高钒高速钢的耐磨性是高铬铸铁的3倍以上。更多还原

【Abstract】 The effects of heat treatment process on retained austenite,hardness,toughness and wear resistance of high vanadium high speed steel were studied,and the optimal heat treatment process for abrasive wear was acquired.The results show that the heat treatment process has remarkable effect on retained austenite content in matrix and wear resistance of the steel,but has little effect on the morphology and distribution of carbide vanadium.The higher the quenching temperature and the lower the tempering temperature is,the more the retained austenite content in the steel.The optimal heat treatment process of the steel for abrasive wear is quenching at 1000～1050℃,and then once tempering at 550℃.After treated by the optimal process,the hardness tested sample is high,the toughness is moderate and the wear resistance is the optimal.The hardness and the wear resistance decrease after multiple tempering.The application results show that the sevice life of the steel is about 3 times higher than that of high chromium cast iron.更多还原