钇基重稀土变质对高镍铬无限冷硬铸铁轧辊组织与性能的影响  

Influence of Yttrium-based Heavy Rare Earth Modification on Structure and Property of High Ni-Cr Infinite Chilled Cast Iron Roll

作　　者：赵立新[1] 王井玉[1] 白云龙[1] 赵文辉[1] 

机构地区：[1]天津重型装备工程研究有限公司,天津300457

出　　处：《大型铸锻件》2015年第5期16-19,共4页Heavy Casting and Forging

摘　　要：研究不同变质剂加入量对高镍铬无限冷硬铸铁轧辊铸态组织、硬度、冲击性能的影响规律。结果表明,残余稀土含量为0.03%~0.05%时,变质效果最佳,石墨形态由片状变为蠕虫状或团状,偏聚现象消失。碳化物主要为莱氏体碳化物,尺寸更加细小。The influence rule of different adding quantity of modifier on the cast structure, hardness and impact property of high Ni-Cr infinite chilled cast iron roll has been studied.The results show that when the residual rare earth content was 0.03%-0.05%, the modifying effect was best.Meanwhile, the graphite morphology turned from flake-like into vermiform or spherical, and the segregation phenomenon disappeared.The main carbide was the ledeburite carbide with smaller size.

关 键 词：高镍铬无限冷硬铸铁 轧辊 钇基重稀土 变质 

分 类 号：TG333.17[金属学及工艺—金属压力加工]