MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Investigation of Sintering Behavior in Low-alloyed Steel Powder Containing TiB2 Particles
Nobuhiko MatsumotoToshitake MiyakeMikio KondohYusuke OishiKazuhiro Toyama
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2019 Volume 60 Issue 9 Pages 1943-1948

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Abstract

In our previous study, TiB2-reinforced sintered steel with a high Young’s modulus was obtained for lightweighting of automobile parts. The high Young’s modulus was attributed to the combination of suitable reinforcing particles for the steel and the high relative sintered density provided by hot-working of the sintered billet.

In this study, how and why the relative sintered density is increased were investigated via single-pressing and single-sintering, by which near net shape parts were simply and easily manufactured.

In steel powder and TiB2 powder compact, the liquid phase of the Fe–B system formed above 1448 K, enhanced the densification. For 2–15 vol% TiB2 addition, the effect of this liquid phase on the densification was appreciable and high relative sintered densities of >98% were achieved by vacuum sintering at 1523 K. This high relative sintered density realized a high Young’s modulus comparable to the calculated value for each TiB2 contents.

 

This Paper was Originally Published in Japanese in J. Jpn. Soc. Powder Powder Metallurgy 65 (2018) 227–232.

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© 2019 Japan Society of Powder and Powder Metallurgy
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