利用盐浴氮碳共渗对45钢进行表面改性,采用扫描电子显微镜（SEM）、X射线衍射仪（XRD）和光学显微镜（OM）等测试手段对改性层的显微结构和组织性能进行了表征。基于球盘式接触疲劳试验机研究了改性层在不同状态下的接触疲劳性能,并采用扫描电子显微镜（SEM）对失效形貌进行了分析。结果表明：45钢氮碳共渗改性层的疲劳裂纹萌生于表面和次表面,失效形式以剥落和表面磨损为主;疏松的白亮层降低了改性层的抗接触疲劳性能,扩散层上保留的5～8μm致密白亮层能有效提高改性层的抗接触疲劳性能。
Modified layer was prepared on surface of a 45 steel by nitroearburizing in salt bath. The microstructure of the modified layer were investigated by means of scanning electric microscopy ( SEM ) , X-ray diffraction (XRD) and optical microscope ( OM ). Contact fatigue property of the modified layer in different conditions were researched on a ball-on-disk tester and the failure mechanism was discussed. The results indicate that the failures initiated at surface and sub-surface,and the failure modes of the nitroearburized steel are mainly spalling off abrasion. The compound layer with typical porous structure can reduce the anti-fatigue property of the modified layer, however,removing the porous compound layer and reserving the dense compound layer of 5 -8 μm above the diffusion layer, the anti- fatigue property of the modified layer is increased significantly.
参考文献
| [1] | 徐洪波,宋美虹,李璐,张洪彬.45钢重型卡车曲轴的表面强化处理[J].金属热处理,2010(03):116-118. |
| [2] | 吴元徽.45钢制车床主轴的热处理工艺分析[J].新技术新工艺,2010(03):72-73. |
| [3] | 岳文,王成彪,田斌,顾艳红,刘家浚.陶瓷润滑油添加剂对钢-钢接触疲劳及磨损性能的影响[J].材料热处理学报,2006(06):118-123. |
| [4] | 徐滨士;朱绍华.表面工程的理论与技术[M].北京:国防工业出版社,2010 |
| [5] | 崔忠圻;覃耀春.金属学与热处理[M].北京:机械工业出版社,2007 |
| [6] | X. C. Zhang;B. S. Xu;F. Z. Xuan;S. T. Tu;H. D. Wang;Y. X. Wu .Rolling contact fatigue behavior of plasma-sprayed CrC-NiCr cermet coatings[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2008(11/12):1875-1883. |
| [7] | 王蕾,吴光英.钢表面获得单相ε化合物层的二段氮碳共渗工艺[J].金属热处理,2009(11):85-88. |
| [8] | 齐宝森;陈路宾;王忠诚.化学热处理技术[M].北京:化学工业出版社,2006 |
| [9] | 丁隆飞;沈本龙.氮基气氛氮碳共渗工艺的研究与应用[J].金属热处理,1992(11):23. |
| [10] | Piao Z Y;Xu B S;Wang H D et al.Investigation of fatigue failure prediction of Fe-Cr alloy coationgs under roiling contact based on acoustic emission technique[J].Applied Surface Science,2011,257:2581-2586. |
| [11] | Stewart S.;Ahmed R. .Contact fatigue failure modes in hot isostatically pressed WC-12%Co coatings[J].Surface & Coatings Technology,2003(2/3):204-216. |
| [12] | HE Bo-lin,YU Ying-xia,SHAO Er-yu.Study on Contact Fatigue Life and Failure Mechanism of Subquenched 42CrMo Steel[J].材料热处理学报,2004(05):260-262. |
| [13] | 刘英杰;成克强.磨损失效分析[M].北京:机械工业出版社,1991 |
| [14] | 盛国裕.工程材料测试技术[M].北京:中国计量出版社,2007 |
| [15] | Holmberg K;Matthews A;Ronainen H .Coatings tribology contact mechanisms and surface design[J].Tribology International,1998,31(1-3):107-112. |
| [16] | 李舜酩.机械疲劳与可靠性分析[M].北京:科学出版社,2006 |
| [17] | 江志华,李志,佟小军,李志明.深氮化硬化钢的接触疲劳试验研究[J].航空材料学报,2006(03):303-304. |
| [18] | Girish D V;Mayuram M M;Krishnamurthy S .Influence of shot peening on the surface durability of thermo mechanically treated En 24 steel spur gears[J].Tribology International,1997,30(12):865-870. |
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