Acta Metall Sin  2012, Vol. 48 Issue (2): 194-198    DOI: 10.3724/SP.J.1037.2011.00560

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GRINDING PROCESS EFFECT ON SURFACE MODIFICATIVE LAYER MICROSTRUCTURE, PROPERTY AND FATIGUE BEHAVIOR OF CARBURIZED M50NiL STEEL

LUO Qinghong, LI Chunzhi, LOU Yanzhi, ZHAO Zhenye

Beijing Institute of Aeronautical Materials, Beijing 100095

LUO Qinghong LI Chunzhi LOU Yanzhi ZHAO Zhenye. GRINDING PROCESS EFFECT ON SURFACE MODIFICATIVE LAYER MICROSTRUCTURE, PROPERTY AND FATIGUE BEHAVIOR OF CARBURIZED M50NiL STEEL. Acta Metall Sin, 2012, 48(2): 194-198.

Abstract References Related Articles Recommended Metrics Download:  PDF(748KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The surface hardness field, modificative layer microstructure and fatigue properties of carburized M50NiL steel after ordinary grinding and precision grinding, were studied using Vickers hardness tester, XRD, TEM, HRTEM and the rotating bending fatigue tester. The results showed that two grinding processes are different only on the amount of feed and surface roughness, but bring larger changes in the surface hardness field, modificative layer microstructure and fatigue properties. Two kinds of grinding have different effects on the hardness depth, the impact depth of precision grinding is smaller; There was more austenite on ordinary grinding surface, and the surface layer showed a clear modificative layer of austenitic"effective grain"; precision grinding surface modificative layer is very small deformation nano–martensite, but also shows a clear"effective grain"phenomenon;effective grainno obvious interface; "effective grain"turning phenomenon is apparent, adjacent "effective grain"rotation angle is up to 14?, while, there are slight turning phenomenon within the"effective grain"; rotating bending fatigue life of precision grinding increases by about 13 times of ordinary grinding sample. Key words:  M50NiL steel      grinding modificative layer      microhardness      microstructure      fatigue property      Received:  07 September 2011      ZTFLH:  TG115.21     O0341   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors LUO Qiang-Hong LI Chun-Zhi LV Yan-Zhi DIAO Zhen-Ye URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00560     OR     https://www.ams.org.cn/EN/Y2012/V48/I2/194 [1] Ma S Y, Xu J H, He X C, Tan M, Li J B. Acta Metall Sin, 2003; 39: 168 (马素媛, 徐建辉, 贺笑春, 覃明, 李家宝. 金属学报, 2003; 39: 168) [2] Yang Y Y, Fang H S, Huang W G. Tribol Int, 1996; 29: 425 [3] Gao C Q. Friction Metallography. Harbin: Harbin Institute of Technology Press, 1988: 32 (高彩桥. 摩擦金属学. 哈尔滨: 哈尔滨工业大学出版社, 1988: 32) [4] Wang C J, Lu D Q, Wu J X. Carburizing Bearing Steel and Heat Treatment. Beijing: Ordnance Industry Press, 1989: 51 (汪传稷, 陆大启, 吴继贤. 渗碳轴承用钢及其热处理. 北京: 兵器工业出版社, 1989: 51) [5] Fu Y F, Cui L J, L iu Y L, Yan Y J. 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