螺旋锥齿轮磨削表层金相组织的试验研究

摘要/Abstract

摘要：

利用金相显微镜对螺旋锥齿轮磨削表层金相组织特征进行检测分析,结果表明,齿轮磨削表面的金相组织为针状马氏体+碳化物+残余奥氏体,心部的组织为板条状低碳马氏体+铁素体+贝氏体。采用正交试验法,分析了不同工艺参数对螺旋锥齿轮表层金相组织的影响规律，根据极差分析得出了磨削最优工艺参数。结果表明，当螺旋锥齿轮小轮凹面磨削工艺参数为磨削深度ap=20μm、砂轮速度vs=35.2m/s、齿轮进给速度vw=0.073m/s时,残余奥氏体量Ar=15.6%,针状马氏体晶粒级别为2级,平均疲劳寿命可达6.0×104次,此时螺旋锥齿轮组织性能最优,可提高齿轮抗疲劳性能和耐磨性。建立了螺旋锥齿轮残余奥氏体量的回归数学模型,计算值和试验测量值相对误差最大绝对值为14.3%,说明该回归数学模型较为有效,其计算结果与残余奥氏体量的试验极差分析结果基本一致。

关键词: 螺旋锥齿轮, 金相组织, 残余奥氏体量, 回归数学模型

Abstract:

Firstly, this paper used metallographic microscope to observe the surface microstructure characteristics of spiral bevel gears.The results show that metallographic organization of gear grinding surface is acicular martensite+carbide+ residual austenite, carburizing layer metallurgical group is high carbon martensite+carbide+residual austenite, the heart of the department of organization is plate strip low carbon martensite+ferrite+bainite. Then the influences of different processing parameters on the spiral bevel gear surface metallurgical structure were analyzed through the orthogonal test method.Lastly,the optimal processing parameters were got through the range analysis. The results show that when the spiral bevel gear small wheel concave grinding process parameters for the depth of grinding ap=20μm, wheel speed vs=35.2m/s, workpiece speed vw=0.073m/s, namely austenitic residual volume is 15.6%, the level of acicular martensite is level 2, the organization optimal is optimal, so as to improve the influence law of gear fatigue performance and improve the wear resistance. A return content mathematical model of of the retained austenite in spiral bevel gear was established, the calculated value and maximum absolute value relative error of experimental measurements is 14.3%, showing that the regression mathematical model is relatively effective, and content of the retained austenite and experimental range analyses results are basically identical.

Key words: spiral bevel gear, metallographic structure, residual austenite volume, regression mathematical model

中图分类号:

TH132.41

明兴祖, 李飞, 张然, 周静. 螺旋锥齿轮磨削表层金相组织的试验研究[J]. 中国机械工程, 2014, 25(2): 174-179.

Ming Xingzu, Li Fei, Zhang Ran, Zhou Jing. Experimental Study on NC Grinding Surface Metallographic Organization of Spiral Bevel Gears[J]. China Mechanical Engineering, 2014, 25(2): 174-179.

参考文献

[1]明兴祖.螺旋锥齿轮磨削界面力热耦合与表面性能生成机理研究[D].长沙:中南大学,2010.
[2]王素玉.高速铣削加工表面质量的研究[D].济南:山东大学,2006.
[3]Stohr R,Heinzel C.Grind-hardening with CBN[J].Abrasives Magazine,2002,53(6):22-30.
[4]Wilde R A.Micro Racks in Carbureted and Hardened Steel[J].Eaton Crop. Intra-CoMPanymeme,1972(2):18-25.
[5]Inoue H.Progress Report on Nickel Carburizing Steels[M].New Caledonia:International Nickel Co.,1974.
[6]Waida T.The Role of Nick in Carburizing Steels[M].New Caledonia:International Nickel Co.,1974.
[7]Matlock D K,Aloagb K A,Richards M D.Surface Processing to Improve the Fatigue Resistance of Advanced Bar Steels for Automotive Application[J].Maters. Res.,2005,8(4):453-459.
[8]Aloagb K A,Matlock D K,Speer J G.The Influence of Niobium Microalloying on Ustenite Grain Coarsening Behavior of Ti-modified SAE8620 Steel[J].ISIJ Int.,2007,47(2):307-316.
[9]严密,孙俊才,王春生.工艺参数对等温淬火球墨铸铁残余奥氏体量的影响[J].钢铁研究报,1995,7(6):53-57.
Yan Mi,Sun Juncai,Wang Chunsheng.Process Parameters on the Influence of Retained Austenite Content Isothermal Quenching Nodular Cast Iron[J].Journal of Iron and Steel Research,1995,7(6):53-57.
[10]魏世忠,朱金华,徐流杰,等.残余奥氏体对高钒高速钢性能的影响[J].材料热处理学报,2005,26(1):44-47.
Wei Shizhong,Zhu Jinhua,Xu Liujie,et al.Residual Austenite Effect on the Properties of High Vanadium High Speed Steel[J]. Journal of Materials Heat Treatment,2005,26(1):44-47.
[11]刘宪冬,王心明,腾巍,等.磨削量对渗碳钢表面残余应力和奥氏体量的影响[C]//第十次全国热处理大会论文集.天津:天津大学,2011:301-305.
[12]贺笃鹏.齿轮钢的渗碳热处理变形与疲劳性能的研究[D].昆明:昆明理工大学,2011.
[13]金荣植.重型汽车驱动桥齿轮材料与工艺对疲劳性能影响的探讨[J].汽车工艺与材料,2009,8(11):41-47.
Jin Rongzhi.Study of Heavy Duty Automobile Drive Axle Gear Materials and Technology Impact on the Fatigue Performance[J]. Journal of Automotive Technology and Materials,2009,8(11):41-47.
[14]赵德寅.汽车渗碳齿轮金相检验_标准修订的新内容[J].汽车技术,1988,37(4):47-52.
Zhao Deyin.Automobile Carburized Gear Metallographic Examination_standard Revision of the New Content[J].Journal of Automotive Technology,1988,5(4):47-52.
[15]Wager J G,Gu D Y.Influence of Up-Grindind and Down-grinding on the Contact Zone[J].Annals of the CIRP, 1991, 40(1): 323-326.
[16]王清波.非线性回归模型参数估计及其应用[D].曲阜:曲阜师范大学,2011.
[17]王蕊,董祥,何卫苹.一种多元非线性回归模型的建立方法及其应用[J].评价与测量,2010,52(11):17-21.
Wang Rui,Dong Xiang,He Weiping.A Method of Multivariate Nonlinear Regression Model and Its Application[J].Journal of Evaluation and Measurement,2010,52(11):17-21.