钇基重稀土蠕化线在蠕墨铸铁制动鼓上的应用  

Application of Yttrium-based Heavy Rare Earth in Vermicular Graphite Iron Brake Drum

作　　者：陈鹏辉 杨清 钟伟昌 陈科 CHEN Peng-hui;YANG Qing;ZHONG Wei-chang;CHEN Ke(Longnan Longyi Heavy Rare Earth Technology Co.,Ltd.,Ganzhou 341001,China;Sichuan Yingxin Huitong Industrial Co.,Ltd.,Chengdu 611332,China)

机构地区：[1]龙南龙钇重稀土科技股份有限公司,江西赣州341001 [2]四川赢信汇通实业有限公司,四川成都611332

出　　处：《现代铸铁》2024年第1期25-30,共6页Modern Cast Iron

摘　　要：介绍了蠕墨铸铁制动鼓的技术要求,详细阐述了制动鼓铸件喂丝相关参数的设定和铈基轻稀土蠕化线生产制动鼓铸件的过程控制以及产生的蠕化衰退问题。在其他化学成分基本不变的情况下,通过采用具有更强的蠕化效果和抗衰退能力的钇基重稀土替代铈基轻稀土蠕化线的措施,使铸件的金相组织符合要求,即:石墨以蠕虫状为主,蠕化率≥50%,没有片状石墨存在,基体以珠光体+铁素体为主,游离碳化物体积分数≤1%,游离碳化物+磷共晶的体积分数≤4%,且力学性能合格。An introduction was made on the technical requirements of vermicular graphite iron,detailed description was given to the wire injection-related parameters setting and process control of using cerium-based light rare earth wire to produce brake drum and problem of vermicularizing degeneration.Under the condition of other chemical compositions being basically unchanged,through using Y-based heavy RE having more strong vermicularizing effect and anti-degeneration capacity to replace Ce-based light RE,made the metallurgical structure to meet requirements,graphite was mainly vermicular shape,vermicularizing rate≥50%,no flake graphite,matrix structure being mainly pearlite+ferrite,free carbide≤1%,free carbide+phosphide eutectic≤4%,and the mechanical properties being qualified.

关 键 词：蠕墨铸铁 制动鼓 蠕化衰退 钇基重稀土 

分 类 号：TG143.49[一般工业技术—材料科学与工程]