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材料研究学报  2009, Vol. 23 Issue (3): 251-256    
  研究论文 本期目录 | 过刊浏览 |
硫化温度对硫化钨薄膜摩擦性能的影响
马莉; 王毛球; 时捷 ;惠卫军; 董瀚
钢铁研究总院先进钢铁材料技术国家工程研究中心 北京 100081
Rolling contact fatigue of microalloying case carburized gear steels
MA Li;  WANG Maoqiu;  SHI Jie;  HUI Weijun;  DONG Han
National Engineering Research Center of Advanced Steel Technology; Central Iron and Steel Research Institute; Beijing 100081
引用本文:

马莉 王毛球 时捷 惠卫军 董瀚. 硫化温度对硫化钨薄膜摩擦性能的影响[J]. 材料研究学报, 2009, 23(3): 251-256.
, , , , . Rolling contact fatigue of microalloying case carburized gear steels[J]. Chin J Mater Res, 2009, 23(3): 251-256.

全文: PDF(872 KB)  
摘要: 

通过滚动接触疲劳试验方法, 研究了两种渗碳齿轮钢的接触疲劳性能. 结果发现, 渗碳齿轮钢接触疲劳试样失效方式主要为渗碳层的点蚀和剥落. 氧含量较低的Nb微合金化齿轮钢(含0.04%的Nb)中氧化物夹杂数量少、尺寸小, 接触疲劳裂纹起裂较难; 同时, Nb微合金化齿轮钢渗碳层晶粒尺寸小、硬度高, 提高了疲劳裂纹萌生及扩展阻力,导致Nb微合金化后, 齿轮钢的接触疲劳寿命大幅度提高.

关键词 金属材料齿轮钢微合金化接触疲劳夹杂物晶粒尺寸    
Abstract

Contact fatigue properties of two case hardening steels have been investigated by means of rolling contact fatigue tests with carburized specimens. Results show that most of the rolling contact fatigue specimens failed due to pitting and spalling in the carburized case. The steel microalloyed with 0.04% niobium has a lower oxygen content and fewer quantity and smaller size of oxide inclusions, which makes fatigue crack initiation more difficult. Moreover, it is also more difficult for fatigue crack propagation in the case of the niobium microalloying steel, owing to its finer grain size and higher hardness. As a result, the rolling contact fatigue life of the steel microalloyed with niobium is much higher than that of the steel without microalloying.

Key wordsmetallic materials    case hardening steel    microalloying    rolling contact fatigue    non-metallic inclusion    grain size
收稿日期: 2008-11-05     
ZTFLH: 

TG111

 
基金资助:

国家八六三计划新材料领域2006AA03Z526资助项目.

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