流动温压成形“十”字形零件及其烧结工艺的研究  

A STUDY ON FABRICATION AND SINTERING PROCESS OF CROSS-SHAPED PART FORMED BY WARM FLOW COMPACTION

作　　者：郑军君[1] 倪东惠[1] 胡昌旭[1] 肖志瑜[1] 周水波[1] 李元元[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,国家金属材料近净成形工程技术研究中心

出　　处：《粉末冶金工业》2010年第1期32-36,共5页Powder Metallurgy Industry

基　　金：国家自然科学基金项目(No.50574041);广东省自然科学基金重点项目(No.06105411);教育部新世纪优秀人才项目(NCET-05-0739)

摘　　要：传统的粉末冶金方法难以制备复杂零件,最近发展起来的流动温压技术通过增加混合粉末的流动性克服了这一难题。本研究采用常用的水雾化铁基粉末,通过加入适量的粘结剂,利用流动温压技术在约160℃的温度下压制出"十"字形零件,然后分别在1120℃和1300℃进行烧结,并研究了其流动温压成形特性、微观结构及烧结性能。结果表明,利用流动温压技术制备出的"十"字形零件表面光滑且没有明显的收缩或者膨胀现象。本文揭示了流动温压技术在制备复杂粉末冶金零件方面的应用。Conventional powder metallurgy is difficult to produce complex parts.However,a recently developed binder-treated warm flow compaction technique can overcome this problem by increasing the flowability of the mixed powder.In this study,using commercial water-atomized binder-treated iron-base powder,the cross-shaped parts were prepared by warm flow compaction at approximately 160℃ and then sintered at 1 120℃ and 1 300℃.Microstructure,shape and properties of the parts were examined.Results showed that cross-shaped parts withous surface defects can be obtained without significant shrinkage or expansion.The warm flow compaction process can be used to produce complex parts.

关 键 词：流动温压 近净成形 铁基粉末冶金 

分 类 号：TF124.3[冶金工程—粉末冶金]