Effects of Shot-peening on Resistance to Softening during Tempering and Contact Fatigue Strength of Carburized and Carbo-nitrided JIS SCr420H Steels

Watanabe, Youichi; Narita, Naoki; Umegaki, Shunzo; Mishima, Yoshinao

doi:10.2355/tetsutohagane1955.84.12_902

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Kenta TSUJII, 1) * Marian Georg SKALECKI, 2) Matthias STEINBACHER 2) and Hans-Werner ZOCH 2) 1) Corporate Research & Development Center, Daido Steel Co., Ltd, 30, 2-Chome, Minami-ku, Nagoya, Aichi, 457-8545 Japan.…”

Section: Development Of a Prediction Methods For Carbonitrided Surfacementioning

confidence: 99%

“…In contrast, during the gas carbonitriding process, both carbon and nitrogen are absorbed into steel surfaces simultaneously, and compared to carburizing, this process can significantly increase wear resistance. 2,3) As a result, although considerable research has been carried out in this field, [1][2][3][4][5][6][7][8] the target carbon and nitrogen contents have been difficult to achieve using controlled processes due to the interactions of carbon and nitrogen during the process, in addition to the lack of a sufficient control system for automatic control of the nitrogen potential in the atmosphere. Carbonitrided components contain high amounts of both carbon and nitrogen, which leads to higher volume fractions of the retained austenite.…”

Section: Introductionmentioning

confidence: 99%

“…Carbonitrided components contain high amounts of both carbon and nitrogen, which leads to higher volume fractions of the retained austenite. 2) In this context, 20-35% of retained austenite has been proven to increase the wear properties of the materi-…”

Section: Introductionmentioning

confidence: 99%

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Section: Development Of a Prediction Methods For Carbonitrided Surfacementioning

confidence: 99%

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confidence: 99%

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Effective production techniques designed to improve the contact fatigue strength of automatic transmission gear teeth

Watanabe

2003

JSAE Review

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Evaluation of rolling contact fatigue behaviour of bearing steel subjected to shot peening in a contaminated lubrication

Sadamori

Takahashi

Koike

2017

Transactions of the JSME (In Japanese)

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In this study, the effect of shot peening on rolling contact fatigue life of bearing steel was investigated under contaminated lubrication. Shot peening was carried out on bearing steel SUJ2 specimens. Peened specimens were polished to remove the dimples generated by shot peening. The distribution of Vickers hardness and residual stress of the specimens were measured before and after the shot peening. The resistance to indentations was compared by examining the profile of the Vickers indentations. Then, rolling contact fatigue tests were carried out under contaminated lubrication. The material hardness was improved up to about 100 HV on the surface to a depth of 300 μm, and compressive residual stress was generated up to 1546 MPa at a depth of 25 μm due to the shot peening. In addition to the width and the depth of the Vickers indentation, the ridge height which causes the stress concentration around the indentation, was reduced by 17% by the shot peening. The rolling contact fatigue life associated with a 50% reliability (L 50 ) was improved 62 % by the shot peening. However, the improvement of rolling contact fatigue life associated with a 90% reliability (L 10 ) was only 26 % because of the increase in dispersion of the fatigue lives due to surface cracks created by the shot peening. Based on the present result, the increase of surface hardness and generating the large compressive residual stress near the surface by shot peening was found to be effective in increasing the rolling contact fatigue life in contaminated lubrication.

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Effects of Shot-peening on Resistance to Softening during Tempering and Contact Fatigue Strength of Carburized and Carbo-nitrided JIS SCr420H Steels

Cited by 7 publications

References 5 publications

Development of a Prediction Method for Carbonitrided Surface Carbon and Nitrogen Contents by Computational Thermodynamics and Validation by Carbonitriding for Pure Iron

Development of a Prediction Method for Carbonitrided Surface Carbon and Nitrogen Contents by Computational Thermodynamics and Validation by Carbonitriding for Pure Iron

Effective production techniques designed to improve the contact fatigue strength of automatic transmission gear teeth

Evaluation of rolling contact fatigue behaviour of bearing steel subjected to shot peening in a contaminated lubrication

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