Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels
スポンサーリンク
概要
- 論文の詳細を見る
To get high performance, downsizing and weight saving of the power transmission systems, the improvement of machine elements has been required. In this study, case-carburized gear materials for a high load-carrying capacity were developed. Low-alloyed steels with 1%Cr-0.2%Mo, 1%Cr-0.2%Mo-1%Si and 1%Cr-0.2%Mo-2%Ni (Cr-Mo steel, Cr-Mo-Si steel and Cr-Mo-Ni steel) were melted in a hypoxia vacuum. Test rollers were made of the developed steels, and they were carburized (Type A and Type B), hardened and tempered. Heating retention tests were carried out to investigate the softening behavior of hardness at high heating temperatures in the case of the developed steels. Roller tests were conducted under the rolling-sliding contact and high-load conditions to study the surface fatigue of the developed steels. From the obtained test results, it was found that the softening behavior of surface hardness at high temperatures in the cases of Cr-Mo-Si steel (Type A) and Cr-Mo-Ni steel (Type B) is lower than that in the cases of Cr-Mo steel (Type A) and Cr-Mo steel (Type B). In the cases of Cr-Mo-Si steel (A) and Cr-Mo-Ni steel (B), micro- and small-pitting area ratios are smaller and large-pitting life is longer than those in the cases of Cr-Mo steel(A) and Cr-Mo steel(B) under the same carburizing treatment method and high-load conditions. Furthermore, the relationship between the softening behavior of surface hardness on the heating pattern and the surface fatigue on the rolling-sliding contact of the developed alloy steels was clarified.
論文 | ランダム
- 25pGT-3 粒子・連続場ハイブリッド法を用いた単一高分子鎖のダイナミクス(25pGT 高分子,領域12(ソフトマター物理,化学物理,生物物理))
- 28aTE-7 Divide-and-Conquer型実空間DFT法の開発と古典分子動力学法とのハイブリッド化(28aTE 電子系,領域11(統計力学,物性基礎論,応用数学,力学,流体物理))
- 微小液滴の壁面衝突現象
- フラボノイド配糖体の研究-1〜2-
- 光独立栄養培養条件下におけるイチゴ培養小植物体の純光合成速度および成長に及ぼす培地の初期無機イオン組成および初期総無機イオン濃度の影響