贝氏体—马氏体抗磨球铁磨球的研制  

Development of Wear-resistant Ductile Iron Mill Ball with Bainite and Martensite

作　　者：孙玉福[1] 赵靖宇[1] 

机构地区：[1]郑州大学材料工程学院,河南郑州450002

出　　处：《铸造技术》2002年第1期25-27,共3页Foundry Technology

摘　　要：试验研制 1种新型抗磨球铁磨球 ,确定磨球化学成分和生产工艺 ,获得了优良的性能。磨球本体硬度HRC48～ 5 5 ,冲击韧性aK=9～ 12J/cm2 , 80mm磨球落球试验次数达 2万次以上。电厂装机应用磨耗 <12 0 g/t煤 ,磨球破碎率 <0 .5 %。A kind of new type wear resistant ductile iron mill ball has been developed.Composition and the production processes of the mill ball have been determined, and thereafter excellent properties have been obtained. The rockwell hardness and the impact toughness of the mill ball are HRC48～55 and 9～12 J/cm 2 ( α K) respectively. The dropping times of dropping ball experiment exceed 20000 times. The application of the mill ball in electric power plant expresses that the amount of abrasion is less than 120 g per ton coal and the breaking ratio is less than 0.5%.

关 键 词：抗磨球墨铸铁 磨球 贝氏体-马氏体 球磨机 

分 类 号：TG255[金属学及工艺—铸造]