Warm compacted NbC particulate reinforced iron-base composite(Ⅰ)——Effect of fabrication parameters

来源期刊：中国有色金属学报(英文版)2002年第4期

论文作者：李元元 肖志瑜 倪东惠 周照耀 邵明

文章页码：659 - 663

Key words：iron-base composite; NbC particulate; warm compaction powder metallurgy

Abstract: NbC was used as reinforced particles in the fabrication of iron-base composite. Ball milling was introduced to overcome the problems of agglomeration and powder separation during powder mixing. After ball milling, the fine NbC particles are embedded on the surface of iron particles and evenly distributed in the mixed powders. Warm compaction was used not only to increase the green density but also to improve the formability of the mixed powder and to improve the compact 's green strength to facilitate handling. The influences of fabrication parameters such as ball milling time, annealing temperature and time, warm compaction temperature, sintering temperature and sintering time were studied. Compacts with a relative sintered density of 97% and a tensile strength of more than 800MPa can be obtained by using a ball milling time of 5h, an annealing temperature of 800℃, a compaction pressure of 600MPa, warm compaction temperature of 120℃, sintering temperature of 1280℃, and sintering time of 80min. The shrinkage at this sintering condition was approximately 4.3%.

基金信息：the National Natural Science Foundation of China