铸态铁素体球墨铸铁生产工艺的研究  

Study on Production Technology of Ferrite Nodular Iron of Casting

作　　者：夏青[1] 姚俊邦 杨涤心[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471032 [2]中信重型机械公司,河南洛阳471003

出　　处：《铸造》2006年第10期1011-1014,共4页Foundry

基　　金：河南科技大学科学研究基金资助项目(2004Zy049)。

摘　　要：铸铁是产量最大的铸造合金,其中球墨铸铁的综合性能最好,铁素体球墨铸铁具有良好的塑性和韧性。目前,我国工厂多采用将铸态球墨铸铁经过退火处理的工艺生产铁素体球墨铸铁,这使得生产工艺复杂,生产周期加长,成本增加。本研究中通过调整终硅量,采用瞬时孕育处理等工艺方法直接得到了铸态铁素体球墨铸铁。结果表明,采用瞬时孕育处理及增加终硅量,可使石墨球径变小,球化率升高,铁素体量增多,力学性能已达到或超过了国家标准。The cast iron has the biggest output in cast alloy. The properties of the ductile iron are the best. The ferrite ductile iron has good plastic and toughness. At present, many factories get ferrite ductile iron by heat treatment in our country, which prolongs the period of production and increases the cost of it. The experiment has been performed to obtain ferrite nodular iron of casting by changing the quantity of silicon and using instantaneous inoculants and so on. The results show that instantaneous inoculants and the increment of the quantity of last-silicon make the graphite＇s diameter diminishes, the rate of circular graphite and the quantity of ferrite increase, and the mechanical property of ferrite nodular iron of casting has already reached or exceeded the national standard.

关 键 词：铸态铁素体球墨铸铁 终硅量 瞬时孕育处理 显微组织 力学性能 

分 类 号：TG255[金属学及工艺—铸造]