稀土对镍铜合金铸铁耐碱蚀性能的影响  

Effect of Rare-earth on Caustic Corrosion Resistance of Nickel-Copper Alloy Cast Iron

作　　者：乌日根[1] 董俊慧[1] 朱霞[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010062

出　　处：《热加工工艺》2005年第11期61-62,共2页Hot Working Technology

基　　金：国家自然科学基金资助项目(50361004);内蒙古自然科学基金资助项目(200208020210)

摘　　要：采用动态失重法测定稀土镍铜合金铸铁在高温浓碱液中的腐蚀速度;用光学显微镜观察显微组织。结果表明:随着稀土含量的增加,稀土镍铜合金铸铁的珠光体基体细化,石墨形态由C型片状过渡到蠕虫状+球状,但是超过一定含量,白口倾向严重;当稀土含量为0.05%时,镍铜合金铸铁试样的耐蚀性较好。The corrosion rate of Re-Ni-Cu alloy cast iron in hot concentrated alkaline solution was measured by the dynamic hydrometer method; the microscopics of alloy were observed by microscope. The results show that with rare-earth increased, the pearlitic structures are refined, the C model flake graphites are changed into quasiflake graphites and globular graphites, but when it is forereached ,the chilling tendency is increased greatly; the caustic corrosion resistance of alloy cast iron with 0.05% RE is better.

关 键 词：稀土 合金铸铁 显微组织 耐碱蚀 

分 类 号：TG143.9[一般工业技术—材料科学与工程]