16L蠕墨铸铁缸体的生产工艺  

Production Process of 16L Vermicular Graphite Iron Cylinder Block

作　　者：王瑞冬 孙继华 马俊杰 刘忠强 杨冬生 赵小龙 孙敬垚 王野 WANG Rui-dong;SUN Ji-hua;MA Jun-jie;LIU Zhong-qiang;YANG Dong-sheng;ZHAO Xiao-long;SUN Jing-yao;WANG Ye(First Foundry,FAW Foundry Co.,Ltd.,Changchun 130022,China)

机构地区：[1]一汽铸造有限公司铸造一厂,吉林长春130022

出　　处：《现代铸铁》2022年第5期21-24,共4页Modern Cast Iron

摘　　要：介绍了16 L蠕墨铸铁缸体铸件的生产过程控制:通过合理的化学成分设计,并将其控制在相对较窄的工艺范围,确保生产过程中铁液的化学成分稳定;采用高温石墨化低硫增碳剂,提高增碳效果,使用碳化硅进行预处理,增加铁液的形核能力;将铁液过热温度提高到1540~1550℃,保温20 min,提高了铁液的纯净度;在1480~1490℃进行蠕化及孕育处理,确保良好的蠕化效果。生产结果显示:生产的铸件本体的蠕化率均达到80%以上,不同壁厚位置蠕化率略有差异,铸件本体的抗拉强度达到420 MPa以上,硬度230~260 HBW。The production process control of 16 L vermicular graphite iron cylinder block was introduced.Through a reasonable chemical composition design and controlling it in a relatively narrow process range,it was ensured that the chemical composition of the iron liquid was stable during production process.Using high temperature-graphitized low S carburant improved carburizing effect.Using SiC pretreatment increased nuclear formation capacity of iron liquid.Increasing the iron liquid overheating temperature to 1540~1550℃,holding for 20 min,elevated the purity of iron liquid.Conducting vermicul-arizing and inoculating treatments at 1480~1490℃ensured good vermicularizing effect.Production result showed:the verm-icularity of casting body reached 80%and higher,the vermicularitiy varied slightly in positions having different wall thickness,tensile strength of casting body reached 420 MPa and higher,hardness was of 230~260 HBW.

关 键 词：蠕墨铸铁 缸体 蠕化率 力学性能 

分 类 号：TG143.49[一般工业技术—材料科学与工程]