焼結Ni合金鋼歯車におけるメゾヘテロ組織及び転造の歯元曲げ疲労特性に及ぼす影響

徳岡 輝和, 山本 龍, 工藤 健太郎, 津守 不二夫, 三浦 秀士, 西岡 隆夫

研究成果: Contribution to journalArticle査読

抄録

This study aims at reducing costs of high load gear manufacturing, and substituting P/M gears for conventional wrought steel gears. In order to improve the fatigue strength of P/M gears, we focused on the rolling and the high performance sintered and heat treated 4600 series alloy steels with mezzo-heterogeneous microstructure which were made from the mixed elemental powders. The fatigue strength was determined by single tooth root bending fatigue test machine, and the effect of mezzo-heterogeneous microstructure and rolling on the fatigue strength was mainly investigated. The endurance limit at <I>N</I>=3.0×10<SUP>6</SUP> of the 500 <I>μ</I>m rolled 6 % Ni alloy steel gear compact showed 950 MPa which value is about 2/3 of the case hardened wrought steel (SCM415) gears. However, the endurance limit of rolled and heat treated gear compact showed lower value (630 MPa) as compared to as-rolled gear compact. This seems to be due to the decreasing the compressive residual stress by heat treatment and unfavorable mezzo-heterogeneous microstructures.
寄稿の翻訳タイトルEffect of Mezzo-Heterogeneous Microstructure and Rolling on the Tooth Root Bending Fatigue Properties of Sintered Ni Alloy Steel Gears
本文言語日本語
ページ(範囲)350-354
ページ数5
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
58
6
DOI
出版ステータス出版済み - 6 15 2011

フィンガープリント

「焼結Ni合金鋼歯車におけるメゾヘテロ組織及び転造の歯元曲げ疲労特性に及ぼす影響」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル