高Ni焼結合金鋼におけるメゾヘテロ組織及び転造の面圧疲労強度に及ぼす影響

工藤 健太郎, 徳岡 輝和, 姜 賢求, 長田 稔子, 津守 不二夫, 三浦 秀士

研究成果: Contribution to journalArticle査読

抄録

This study aims to improve the fatigue strength of P/M gears and to substitute P/M gears for conventional wrought steel gears with reduced manufacturing costs. The 4600 series sintered alloy steels with mixed elemental powders show the mezzo-heterogeneous microstructure which consists of high-hard Ni rich areas and the surrounding martensitic structures. This mezzo-heterogeneous structure causes high strength to the products.<BR>In this paper, we discuss the effects of Ni contents on the contact fatigue strength, and the effect of the pore size is also discussed for further strengthening. Especially, from the evaluation of the area of isolated pores in the densified surface layer after the rolling, it was found that the decrease of pore sizes is very important to improve the contact fatigue strength.
寄稿の翻訳タイトルEffect of Mezzo-Heterogeneous Microstructure and Rolling on the Rolling Contact Fatigue Strength of Sintered High Ni Alloy Steels
本文言語Japanese
ページ(範囲)258-263
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
59
5
DOI
出版ステータス出版済み - 5 15 2012

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