摘要
接触疲劳破坏是铸铁齿轮的主要失效形式之一。本文研究在铸铁齿轮齿面涂镀Ni-P -Co合金层 ,以提高其接触疲劳强度 ,效果显著。同时 ,对合金涂层的表面形貌 ,次表面组织、纵剖面界面组织 ,表面粗糙度、涂层的硬度和疲劳点蚀坑形貌特征进行了分析。
Cast iron is a material used for gear manufacture with good comprehensive performance and cheep price, which has extensive application in auto-mobile, tractor and agricultural machinery industry etc. Contact fatigue failure is the main failure type for cast iron gear. The autors researched the contact fatigue strength of Ni-P-Co alloy coating on the tooth surface of gears made of cast iron. With the help of Electron Microscope (EM) and Optical Microscope (OM), several studies on the alloying coating, such as surface shape, subsuper-ficical metellographic sturface, interface structure of longitudinal section, surface roughness, binding strength between alloy coating and matrix metal, element analysis of coating, micro-hardness and shape characteristic of fatigue pitting hole were carried out. The experimental results are analyzed and conclusion is as follows: contact fatigue life and strength of cast iron gears with Ni-P-Co alloy coating and air-cooling after heat-treatment with temperature of 450℃ are increased remarkably.
出处
《机械传动》
CSCD
2002年第2期16-19,共4页
Journal of Mechanical Transmission
