铸态QT450-10球墨铸铁生产工艺研究  

An Investigation Study on Production Process of As-Cast QT450-10 Grade Nodular Iron

作　　者：王建民[1] 刘君武[1] 周远标 解明国[3] 王迪[1] 林清泉[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]白湖阀门厂,安徽庐江231508 [3]合肥铸锻厂,安徽合肥230001

出　　处：《现代铸铁》2007年第2期48-51,共4页Modern Cast Iron

摘　　要：采用中频感应电炉熔炼或冲天炉加工频感应电炉双联熔炼,以及不同成分的生铁原材料来生产铸态铁素体球墨铸铁,研究熔炼设备、原材料、球化剂加入量、化学成分、浇注温度、浇注时间等对球铁性能的影响。试验球铁采用的化学成分为:w(C)3.6%～4.0%,w(Si)2.4%～2.8%,w(Mn)0.3%～0.4%,w(S)<0.02%,w(P)<0.06%。球化剂稀土镁合金的加入量为1.0%～1.8%。研究发现:原铁液w(S)量愈低,球化剂加入量愈少,球铁的性能为:σb>450MPa,δ>10%;原铁液w(S)量高,球化剂加入量大,性能较差:σb>450MPa,但δ<10%。By using medium frequency induction furnace melting and cupola -induction furnace duplex melting, pig irons with different compositions to produce as-east fertite nodular iron, the influences of melting equipments, raw materials, addition amount of nodularizing alloy, chemical composition, pouting temperature and pouring time on the properties of nodular iron was investigated. The chemical composition of test nodular iron was adopted as follows： ω（C）3.6%～4.0% ,ω（Si）2.4%～2.8%,ω（Mn） 0.3%～0.4% ,ω （S）〈0.02%, ω（17）〈0.06%. The addition of rare earth -magnesium -ferrosilieon alloy used as nodularizer was of 1.0%-1.8%. It was found by investigation that the low the sulphur content, the less the addition of nodularizer was needed, and the mechanical properties was：σb〉450 MPa,δ〉10%,; contrarily, the high the sulphur content, the more addition of nodularizer was needed, and the elongation was lower than required value：σb〉450 MPa,δ〉10%.

关 键 词：铸态铁素体球铁 化学成分 力学性能 

分 类 号：TG143.5[一般工业技术—材料科学与工程]