制备铁基高温合金多孔材料的新方法  

A new preparation method for porous iron-based superalloy materials

作　　者：李维杰[1] 刘咏[1] 王岩[1] 韩朝[1] 汤慧萍[2] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]西北有色金属研究院金属多孔材料国家重点实验室,西安710016

出　　处：《粉末冶金材料科学与工程》2012年第3期370-376,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA032601);粉末冶金国家重点实验室开放课题基金资助项目

摘　　要：向Fe-Cr-W-Ti-Y合金粉末中添加原子比为3：1的Fe/Al混合粉末,利用Kirkendall效应和Fe、Al反应造孔制备铁基高温合金多孔材料。研究Fe/Al混合粉末的添加量对Fe-Cr-W-Ti-Y高温多孔材料开孔隙率及孔结构的影响。结果表明,加入Fe/Al混合粉末能显著提高烧结坯的开孔隙率,但并非所加Fe/Al混合粉末含量越多越好,Fe/Al混合粉末质量分数为15%时,烧结坯开孔隙率达到最大值33%。Fe/Al混合粉添加量在15%~45%范围内,随Fe/Al混合粉末含量增加烧结坯的开孔隙率下降。The porous iron-based superalloy materials have been prepared through the Kirkendall effect and using Fe-Cr-W-Ti-Y alloy powder adding Fe/Al mixed powder（with atomic ratio of 3：1） as raw materials. The effect of Fe/Al mixed powder content on the open porosity of porous iron-based superalloy materials was investigated. The results show that the addition of Fe/Al mixed powder can significantly increase the open porosity of the sintered compact. However, there is not a strictly linear increment rule between the Fe/Al mixed powder content and the open porosity. As added 15% （mass fraction） Fe/Al mixed powder, the sintered compact has the maximum open porosity of 33%. With the Fe/Al mixed powder content in the range of 15%-45%, the open porosity of the sintered compact decreases with the Fe/Al mixed oowder content increasing.

关 键 词：铁基高温合金 多孔材料 Kirkendall效应 制备 混合粉末 孔隙率 烧结坯 合金粉末 

分 类 号：TF125.6[冶金工程—粉末冶金]