重熔方式对过共晶高铬铸铁凝固组织的影响  

Effect of Remelting Method on Solidification Structure of Hypereutectic High Chromium Cast Iron

作　　者：康明远 周荣锋[1,2] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明理工大学分析测试研究中心,云南昆明650093

出　　处：《热加工工艺》2016年第21期78-80,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(51261011);云南省人才培养基金资助项目(2009CI024)

摘　　要：采用电阻炉和高频感应炉对过共晶高铬铸铁试样加热至1400℃,重熔后水淬,研究重熔方式对过共晶高铬铸铁凝固组织中初生碳化物和共晶组织的影响。结果表明,与电阻炉重熔方式相比较,高频感应重熔试样中初生碳化物显著细化,等效直径由199μm降低到74μm,片层状的共晶碳化物变成粒状,共晶碳化物的网状分布程度减轻,基体的连续性增强。Hypereutectic high chromium cast iron （HCCI） was heated to 1400~C by using resistance furnace and high frequency induction furnace, and it was water quenched after remelting. The effect of remelting method on primary carbides and eutectic microstructure of HCCI solidification structure was investigated in the paper. The results show that compared with the resistance furnace remelting, primary carbides of high frequency induction remelting sample refine significantly, and the equivalent diameter reduces from 199 μm to 74 μm. The lamellar eutectic carbides turn to granuious carbides, the reticular distribution degree of eutectic carbides reduces and the continuity of the matrix increases.

关 键 词：过共晶高铬铸铁 重熔方式 初生碳化物 共晶碳化物 组织细化 

分 类 号：TG143[一般工业技术—材料科学与工程]