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铸态珠光体球墨铸铁组织形态与性能

, PP. 179-182

Keywords: 铸态球墨铸铁,珠光体形态,铜锑合金化,性能

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Abstract:

在普通球墨铸铁的基础上,加入Cu、Sb合金元素,通过余温正火工艺,获得铸态珠光体球墨铸铁。该铸铁的珠光体含量大于(等于)95%,渗碳体小于(等于)5%,抗拉强度可达700~850Mpa,硬度为280~350HB,延伸率为3%~5%。扫描电镜及透射电镜分析表明,当加入0.5%Cu、0.02%Sb时,合金主要由珠光体与球状石墨组成,其中铸态珠光体层片间距变小,石墨球细小而均匀,铁素体的形成受到抑制。

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