摘要
以贝氏体辙叉钢为研究对象,利用摩擦磨损试验机、场发射扫描电子显微镜、X射线衍射研究不同含氢量的贝氏体辙叉钢的摩擦磨损行为,并与普通高锰钢的耐磨性进行对比。结果表明,氢可以明显地提高贝氏体辙叉钢的耐磨性;贝氏体钢的耐磨性能明显高于高锰钢。贝氏体辙叉钢在小载荷下为磨粒磨损机制,在大载荷下为粘着磨损。氢降低贝氏体辙叉钢中残余奥氏体的稳定性,在摩擦磨损过程中,氢促进贝氏体辙叉钢残余奥氏体相发生应变诱发马氏体相变,使贝氏体辙叉钢摩擦磨损表面的硬度显著提高,在加工硬化和应变的共同作用下,增强了贝氏体辙叉钢的抗摩擦磨损的能力。
The wear behavior of the bainitic steel used for crossings with electrochemical hydrogen charging are investigated by the wear testing machine, scanning electron microscopy, X-ray diffraction, and comparing with the high manganese steel. The results indicate that hydrogen can significantly improve the wear resistance of the bainitic steel. The wear resistance of the bainitic steel is obviously higher than the high manganese steel. The main wear mechanism of the bainitic crossing steel at lower load is the abrasive wear, and the adhesive wear at higher load. Hydrogen can reduce the stability of retained austenite in the bainitic crossing steel, and hydrogen promotes that the retained austenite phase occurs strain-induced martensitic transformation in the wear process. The hardness of the wear surfaces evidently increases. Therefore, the wear resistance of the bainitic crossing steel is enhanced.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第20期33-38,共6页
Journal of Mechanical Engineering
基金
国家杰出青年科学基金(50925522)
国家自然科学基金(51121061)资助项目
关键词
贝氏体钢
摩擦磨损
铁路辙叉
氢
马氏体相变
Bainitic steel Wear Railroad crossing Hydrogen Martensitic transformation
