ショットピーニング処理された浸炭鋼の疲労限度に及ぼす試験片採取方向の影響
本研究では，圧延直交(TD)および圧延平行(RD)方向から素材採取したSCM420Hに対し，真空浸炭焼入れ-焼戻しおよびショットピ-ニング後に，平面曲げ疲労試験を行った．その結果，ショットピ-ニングされていない浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約32％高い結果となった．またショットピ-ニング処理された浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約41％高い結果となった．TD方向試験片の破断の多くは棒状介在物を起点として発生していた．一方，RD方向試験片の場合は，非金属介在物外からの破断であった．このことから，TD方向採取の疲労強度が低い理由は，圧延により伸長した棒状介...
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| Published in | 砥粒加工学会誌 Vol. 68; no. 11; pp. 624 - 630 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Japanese |
| Published |
公益社団法人 砥粒加工学会
01.11.2024
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| Online Access | Get full text |
| ISSN | 0914-2703 1880-7534 |
| DOI | 10.11420/jsat.68.624 |
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| Abstract | 本研究では，圧延直交(TD)および圧延平行(RD)方向から素材採取したSCM420Hに対し，真空浸炭焼入れ-焼戻しおよびショットピ-ニング後に，平面曲げ疲労試験を行った．その結果，ショットピ-ニングされていない浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約32％高い結果となった．またショットピ-ニング処理された浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約41％高い結果となった．TD方向試験片の破断の多くは棒状介在物を起点として発生していた．一方，RD方向試験片の場合は，非金属介在物外からの破断であった．このことから，TD方向採取の疲労強度が低い理由は，圧延により伸長した棒状介在物が存在するために，最大応力方向に対する介在物投影面積が大きく，非金属介在物からの破壊が発生しやすいためである． |
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| AbstractList | 本研究では，圧延直交(TD)および圧延平行(RD)方向から素材採取したSCM420Hに対し，真空浸炭焼入れ-焼戻しおよびショットピ-ニング後に，平面曲げ疲労試験を行った．その結果，ショットピ-ニングされていない浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約32％高い結果となった．またショットピ-ニング処理された浸炭鋼の疲労限度はRD方向採取の方がTD方向採取より約41％高い結果となった．TD方向試験片の破断の多くは棒状介在物を起点として発生していた．一方，RD方向試験片の場合は，非金属介在物外からの破断であった．このことから，TD方向採取の疲労強度が低い理由は，圧延により伸長した棒状介在物が存在するために，最大応力方向に対する介在物投影面積が大きく，非金属介在物からの破壊が発生しやすいためである． |
| Author | 辻, 俊哉 髙橋, 宏治 藤野, 真士 |
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| References | 15) G. MATSUBARA, K. MICHIBA, K. MASAMOTO and T. YUKISITA: Estimation of Surface Origin Fatigue Fracture Strength of Carburized Steels. Transactions of the Japan Society of Mechanical Engineers Series A, 73,725(2007),109(in Jap.anese)10.1299/kikaia.75.652 1) Y. MURAKAMI: Quantitative Evaluation of Effects of Defects and Non-metallic Inclusions on Fatigue Strength of Metals, Tetsu-to-Hagane, 75, 8(1983), 1267 (in Japanese).10.2355/tetsutohagane1955.75.8_1267 3) T. HORI, M. HISHIKI, H. KAWABE and M. UEMURA: Effect of Morphology and Direction of Nonmetallic Inclusions on Fatigue Life of Bearing Steel, Journal of the Japan Society of Precision Engineering, 49, 10(1983), 1345(in Japanese).10.2493/jjspe1933.49.1345 8) M. SUGIMOTO, R. IKEDA, K. SATOH, K. KANAZAWA and A. TANGE: Configurations of Fish-Eyes Formed on Fatigue Fracture Surfaces of a Shot Peened Spring Steel Equivalent to SUP 12, Journal of the Society of Materials Science, 56, 12 (2007) 1118 (in Japanese).10.2472/jsms.56.1118 5) K. INOUE, T. MAEHARA, M. YAMANAKA and M. KATO: The Effect of Shot Peening on the Bending Strength of Carbonized Spur Gear Teeth, Transactions of the Japan Society of Mechanical Engineers Series C, 54, 502(1988), 1331 (in Japanese).10.1299/kikaic.54.1331 4) Y. FURUYA: Effects of MnS on Gigacycle Fatigue Properties of SCM440 Steel, Tetsu-to-Hagane, 106, 11(2020), 799(in Japanese).10.2355/tetsutohagane.TETSU-2020-051 6) T. KOYAMA, M. KUBOTA and S. YOSHIDA: Effect of Si Concentration on Carbon Concentration on Surface Layer in Gas Carburizing, Tetsu-to-Hagane, 101, 4 (2015), 252 (in Japanese).10.2355/tetsutohagane.101.252 14) J. YAMABE, S. YOSHIDA, K. KONUMA and T. MATSUI: Quantitative Evaluation of Fatigue Strength at N=107 for Carburized Steels. Transactions of the Japan Society of Mechanical Engineers Series A, 75,753(2007),652(in Japanese).10.1299/kikaia.73.109 16) Y. MURAKAMI, M. KOBAYASHI, T. MAKINO, T. TORIYAMA, Y. KURIHARA, S. TAKASAKI and R. EBARA: A Comprehensive Evaluation of Factors Influencing the Fatigue Strength of Spring Steels (Nonmetallic Inclusions, Shot Peening, Decarburized Layer and Small Surface Pits), Transactions of Japan Society of Spring Engineers, 39(1994) 7 (in Japanese).10.5346/trbane.1994.7 2) T. IIKUBO, Y. ITO, H. HAYASHI, T. SAITO and N. TAKAGI: Effects of Non-metallic Inclusions on Fatigue Properties of Ultra-Clean Spring Steels, DENKI-SEIKO, 57, 1(1986), 23 (in Japanese). 12) T. TSUJI, M. FUJINO and K. TAKAHASHI: Fatigue Limit Improvement and Rendering Surface Defects Harmless by Shot Peening for Carburized Steel, Metals, 13, 1 (2023) 42.10.3390/met13010042 9) C. MASUDA, S. NISHIJIMA and M. SHIMODAIRA: On Fish Eye Formation in the Fatigue of Carbonized Steels, Transactions of the Japan Society of Mechanical Engineers Series A, 49, 440 (1983) 413 (in Japanese).10.1299/kikaia.49.413 10) T. TSUJI, Y. KOBAYASHI and K. MASAKI: Effect of Residual Stress Distribution on the Rotating Bending Fatigue Properties of Shot Peening Treated Carburized Steel, Transactions of Japan Society of Spring Engineers, 67(2022) 75 (in Japanese).10.5346/trbane.2022.75 7) R. ISHIKURA, T. KANO, Y. KOBAYASHI and S. UJIHASHI: Research on Relationship between Surface Microstructure in Carburized Steels and Maximum Residual Stress Induced by Shot Peening, DENKI-SEIKO, 79, 1 (2008) 25 (in Japanese).10.4262/denkiseiko.79.25 11) Y. KOBAYASHI, T. TSUJI, R. ISHIKURA and K. INOUE: Influences of Mechanical Properties and Retained Austenite Content on Shot-peening Characteristics, Transactions of Japan Society of Spring Engineers, 57(2012) 9 (in Japanese).10.5346/trbane.2012.9 13) T. TSUJI, M. FUJINO and K. TAKAHASHI: Effect of Shot Peening Conditions on the Surface Defect Size Rendered Harmless in Carburized Steel. Transactions of Japan Society of Spring Engineers, 69(2024),55(in Japanese).10.5346/trbane.2024.55 17) Y. MURAKAMI, Y. UEMURA, Y. NATSUME and S. MIYAKAWA: Effect of Mean Stress on the Fatigue Strength of High-Strength Steels Containing Small Defects or Nonmetallic Inclusions, Transactions of the Japan Society of Mechanical Engineers Series A, 56, 525(1990), 1074 (in Japanese).10.1299/kikaia.56.1074 |
| References_xml | – reference: 1) Y. MURAKAMI: Quantitative Evaluation of Effects of Defects and Non-metallic Inclusions on Fatigue Strength of Metals, Tetsu-to-Hagane, 75, 8(1983), 1267 (in Japanese).10.2355/tetsutohagane1955.75.8_1267 – reference: 6) T. KOYAMA, M. KUBOTA and S. YOSHIDA: Effect of Si Concentration on Carbon Concentration on Surface Layer in Gas Carburizing, Tetsu-to-Hagane, 101, 4 (2015), 252 (in Japanese).10.2355/tetsutohagane.101.252 – reference: 16) Y. MURAKAMI, M. KOBAYASHI, T. MAKINO, T. TORIYAMA, Y. KURIHARA, S. TAKASAKI and R. EBARA: A Comprehensive Evaluation of Factors Influencing the Fatigue Strength of Spring Steels (Nonmetallic Inclusions, Shot Peening, Decarburized Layer and Small Surface Pits), Transactions of Japan Society of Spring Engineers, 39(1994) 7 (in Japanese).10.5346/trbane.1994.7 – reference: 5) K. INOUE, T. MAEHARA, M. YAMANAKA and M. KATO: The Effect of Shot Peening on the Bending Strength of Carbonized Spur Gear Teeth, Transactions of the Japan Society of Mechanical Engineers Series C, 54, 502(1988), 1331 (in Japanese).10.1299/kikaic.54.1331 – reference: 11) Y. KOBAYASHI, T. TSUJI, R. ISHIKURA and K. INOUE: Influences of Mechanical Properties and Retained Austenite Content on Shot-peening Characteristics, Transactions of Japan Society of Spring Engineers, 57(2012) 9 (in Japanese).10.5346/trbane.2012.9 – reference: 12) T. TSUJI, M. FUJINO and K. TAKAHASHI: Fatigue Limit Improvement and Rendering Surface Defects Harmless by Shot Peening for Carburized Steel, Metals, 13, 1 (2023) 42.10.3390/met13010042 – reference: 15) G. MATSUBARA, K. MICHIBA, K. MASAMOTO and T. YUKISITA: Estimation of Surface Origin Fatigue Fracture Strength of Carburized Steels. Transactions of the Japan Society of Mechanical Engineers Series A, 73,725(2007),109(in Jap.anese)10.1299/kikaia.75.652 – reference: 7) R. ISHIKURA, T. KANO, Y. KOBAYASHI and S. UJIHASHI: Research on Relationship between Surface Microstructure in Carburized Steels and Maximum Residual Stress Induced by Shot Peening, DENKI-SEIKO, 79, 1 (2008) 25 (in Japanese).10.4262/denkiseiko.79.25 – reference: 13) T. TSUJI, M. FUJINO and K. TAKAHASHI: Effect of Shot Peening Conditions on the Surface Defect Size Rendered Harmless in Carburized Steel. Transactions of Japan Society of Spring Engineers, 69(2024),55(in Japanese).10.5346/trbane.2024.55 – reference: 8) M. SUGIMOTO, R. IKEDA, K. SATOH, K. KANAZAWA and A. TANGE: Configurations of Fish-Eyes Formed on Fatigue Fracture Surfaces of a Shot Peened Spring Steel Equivalent to SUP 12, Journal of the Society of Materials Science, 56, 12 (2007) 1118 (in Japanese).10.2472/jsms.56.1118 – reference: 10) T. TSUJI, Y. KOBAYASHI and K. MASAKI: Effect of Residual Stress Distribution on the Rotating Bending Fatigue Properties of Shot Peening Treated Carburized Steel, Transactions of Japan Society of Spring Engineers, 67(2022) 75 (in Japanese).10.5346/trbane.2022.75 – reference: 3) T. HORI, M. HISHIKI, H. KAWABE and M. UEMURA: Effect of Morphology and Direction of Nonmetallic Inclusions on Fatigue Life of Bearing Steel, Journal of the Japan Society of Precision Engineering, 49, 10(1983), 1345(in Japanese).10.2493/jjspe1933.49.1345 – reference: 4) Y. FURUYA: Effects of MnS on Gigacycle Fatigue Properties of SCM440 Steel, Tetsu-to-Hagane, 106, 11(2020), 799(in Japanese).10.2355/tetsutohagane.TETSU-2020-051 – reference: 2) T. IIKUBO, Y. ITO, H. HAYASHI, T. SAITO and N. TAKAGI: Effects of Non-metallic Inclusions on Fatigue Properties of Ultra-Clean Spring Steels, DENKI-SEIKO, 57, 1(1986), 23 (in Japanese). – reference: 17) Y. MURAKAMI, Y. UEMURA, Y. NATSUME and S. MIYAKAWA: Effect of Mean Stress on the Fatigue Strength of High-Strength Steels Containing Small Defects or Nonmetallic Inclusions, Transactions of the Japan Society of Mechanical Engineers Series A, 56, 525(1990), 1074 (in Japanese).10.1299/kikaia.56.1074 – reference: 9) C. MASUDA, S. NISHIJIMA and M. SHIMODAIRA: On Fish Eye Formation in the Fatigue of Carbonized Steels, Transactions of the Japan Society of Mechanical Engineers Series A, 49, 440 (1983) 413 (in Japanese).10.1299/kikaia.49.413 – reference: 14) J. YAMABE, S. YOSHIDA, K. KONUMA and T. MATSUI: Quantitative Evaluation of Fatigue Strength at N=107 for Carburized Steels. Transactions of the Japan Society of Mechanical Engineers Series A, 75,753(2007),652(in Japanese).10.1299/kikaia.73.109 |
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| Title | ショットピーニング処理された浸炭鋼の疲労限度に及ぼす試験片採取方向の影響 |
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