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期刊论文

Warm compacted NbC particulate reinforced iron-base composite(I)① --Effect of fabrication parameters

李元元LI Yuan-yuan XIAO Zhi-yu NGAI Tungwai Leo ZHOU Zhao-yao SHAO Ming

Vol. 12 No.4 Trans. Nonferrous Met. Soc. China Aug. 2002,-0001,():

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摘要/描述

he 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 he obtained by using a ball milling time of 5h, an annealing temperature of 800℃, a compaction pressure of 600MPa, warm compaction temperatore of 120℃, sintering temperature of 1 280℃, and sintering time of 80min. The shrinkage at this sintering condition was approximately 4.3%.

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