Al对HP40合金显微组织的影响  

Effect of Aluminum on Microstructure of HP40 Alloy

作　　者：喇培清[1] 曾丽[1] 刘致远[1] 王维国[1] 阎峰云[1] 郝远[1] 

机构地区：[1]兰州理工大学有色金属新材料国家重点室培育基地,甘肃兰州730050

出　　处：《铸造》2008年第5期487-490,共4页Foundry

基　　金：国家自然科学基金资助项目(50674051)

摘　　要：试验中用中频无芯感应炉熔炼、树脂砂型制备出HP40、加Al5%～10%降Ni5%～10%的合金试样,用Mef3光学金相显微镜观察金相组织,用EPMA-1600电子探针分析组织中各元素的分布,结合D8ADVANCE型X射线衍射确定合金中的相组成。结果表明,随铝含量增加,合金基体从γ相转变为α相;析出相除碳化物外,还生成了FeNiAl金属间化合物强化相,并随铝含量的增多进一步增多、长大,形状由片条状逐步转变成羽毛状。HP40 based steels with 5%-10% Al in displacement of Ni were prepared by intermediate frequency inductive furnace processing and resin sand mould. Microstructures of the alloys were investigated by optical microscope. Distribution of every element in matrix was analyzed by electron probe microanalysis （EPMA-1600）. All phases made up of the alloy were confirmed by x-ray diffraction. The results showed that matrix of the alloys transformed from γ-Fe solution to α Fe solution phase and created lots of FeNiAl phase with increase of Al. Their shape changed from slip to featheriness.

关 键 词：HP40合金 NiFeAl Cr7C3 强化相 

分 类 号：TG27[金属学及工艺—铸造]