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 Effect of Mezzo-Heterogeneous Microstructure and Rolling on the Rolling Contact Fatigue Strength of Sintered High Ni Alloy Steels

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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.

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.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 59(5), 258-263, 2012-05-15

    一般社団法人 粉体粉末冶金協会

参考文献:  11件中 1-11件 を表示

被引用文献:  1件中 1-1件 を表示

  • 粉末成形

    三浦 秀士 , 沖本 邦郎 , 宇波 繁 , 渡辺 龍三 , 後藤 隆宏 , 近藤 勝義 , 三浦 秀士 , 品川 一成 , 高木 研一 , 松原 秀彰 , 川崎 亮 , 橋井 光弥 , 久米 裕二 , 徳岡 輝和 , 三浦 秀士 , 津守 不二夫

    塑性と加工 54(631), 703-706, 2013-08-25

    J-STAGE 参考文献81件

各種コード

  • NII論文ID(NAID)
    10030765112
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    023804847
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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