高Cr白口铸铁破碎机锤头的研究及应用  

Research on and Application of Hi-Cr Cast Iron Crusher Hammer Head

作　　者：子澍[1] 邱九雄 黄李衡 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]湖南省郴州市金属回收公司耐磨材料厂,湖南郴州423000

出　　处：《现代铸铁》2012年第3期31-33,共3页Modern Cast Iron

摘　　要：为降低高Cr白口铸铁破碎机锤头的生产成本，在不加Mo仅加质量分数0．3％的C的条件下，采用含有Ti、B、RE的变质剂进行变质处理以及油中淬火的热处理工艺，细化了共晶组织及初晶碳化物，得到了马氏体基体，破碎机锤头的硬度达到63～67HRC，冲击值在15～20J／cm^2，提高了锤头使用寿命。In order to reduce production cost of the high chromium white cast iron crusher hammer head, under the condition of adding only 0.3% Cu but no Mo,the Ti-B-RE-containing modifying alloy was adopted to conduct modification treatment, and then the casting was quenched in oil bath. As the result,the eutectic structure and primary carbide was fined and the martensite matrix was obtained so that the hardness of the crusher hammer head reached 63-67 HRC,its impact toughness was of 15-20 J/cmE,the working life of the hammer head was increased that satisfied consumer very much.

关 键 词：高Cr白口铸铁 破碎机锤头 变质处理 

分 类 号：TG257[金属学及工艺—铸造]