Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels
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%...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2009-03-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/3/1/3_1_85/_pdf/-char/en |
| _version_ | 1828193686638297088 |
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| author | Daniel Tilahun REDDA Tsutomu NAKANISHI Gang DENG |
| author_facet | Daniel Tilahun REDDA Tsutomu NAKANISHI Gang DENG |
| author_sort | Daniel Tilahun REDDA |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T09:11:33Z |
| format | Article |
| id | doaj.art-5f9fb19e741b4e9581010407abf1a4d5 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-04-12T09:11:33Z |
| publishDate | 2009-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-5f9fb19e741b4e9581010407abf1a4d52022-12-22T03:38:57ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542009-03-0131859210.1299/jamdsm.3.85jamdsmSoftening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy SteelsDaniel Tilahun REDDA0Tsutomu NAKANISHI1Gang DENG2Graduate School of Engineering, University of MiyazakiDepartment of Mechanical Systems Engineering, Faculty of Engineering, University of MiyazakiDepartment of Mechanical Systems Engineering, Faculty of Engineering, University of MiyazakiTo 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.https://www.jstage.jst.go.jp/article/jamdsm/3/1/3_1_85/_pdf/-char/engearrollermaterialalloy steelcarburizinghardnesstemperaturesurface fatigue |
| spellingShingle | Daniel Tilahun REDDA Tsutomu NAKANISHI Gang DENG Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels Journal of Advanced Mechanical Design, Systems, and Manufacturing gear roller material alloy steel carburizing hardness temperature surface fatigue |
| title | Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels |
| title_full | Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels |
| title_fullStr | Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels |
| title_full_unstemmed | Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels |
| title_short | Softening Behavior of Hardness and Surface Fatigue of Rolling-Sliding Contact in the Case of Developed Alloy Steels |
| title_sort | softening behavior of hardness and surface fatigue of rolling sliding contact in the case of developed alloy steels |
| topic | gear roller material alloy steel carburizing hardness temperature surface fatigue |
| url | https://www.jstage.jst.go.jp/article/jamdsm/3/1/3_1_85/_pdf/-char/en |
| work_keys_str_mv | AT danieltilahunredda softeningbehaviorofhardnessandsurfacefatigueofrollingslidingcontactinthecaseofdevelopedalloysteels AT tsutomunakanishi softeningbehaviorofhardnessandsurfacefatigueofrollingslidingcontactinthecaseofdevelopedalloysteels AT gangdeng softeningbehaviorofhardnessandsurfacefatigueofrollingslidingcontactinthecaseofdevelopedalloysteels |