贝氏体抗磨球墨铸铁热处理工艺研究

Study on Heat Treatment Process of Wear-resistant Bainitic Nodullar Cast Iron

研究了淬火介质、奥氏体化温度和回火温度对贝氏体抗磨球墨铸铁组织与性能的影响。选择了合理的热处理工艺 ,获得了优良的性能 ,使其硬度达 5 0～ 5 5HRC ,冲击韧度aK=8～ 15J/cm2 ,80mm磨球冲击疲劳寿命 (落球试验的跌落次数 )达

In this paper,the influence of quenching medium,austenitizing and tempering temperature on the structure and properties of the wear resistant bainitic nodullar cast iron has been studied through experiments.By applying reasonable heat treatment process the excellent properties have been obtained.The hardness:50～55HRC,the impact toughness a K=8～15J/cm 2,and the impact fatigue life of 80mm mill ball has reached over 20000 times (dropping times of dropping ball experiment).