论文部分内容阅读
表面剥落是等温贝氏体球铗齿轮失效的主要方式。为提高球铁齿轮的使用寿命,必需研究球铁接触疲劳破坏的规律和寻找提高球铁抗剥落能力的措施。本文是球铁接触疲劳试验第一阶段工作小结。使用ZYS—6型接触疲劳试验机测定了经完全奥氏体化(奥氏体化温度910℃)与部分奥氏体化(奥氏体化温度880℃)等温淬火的普通球铁以及经上述两种奥氏体化温度等温淬火的低硫球铁的接触疲劳曲线和接触疲劳极限;研究了当试验用的工作轮由等温贝氏体球铁改为GCr15钢时,普通球铁接触疲劳极限的变化;研究了等温贝氏体球铁基体组织与接触疲劳极限之间的关系;并用金相法研究了球铁的接触疲劳破坏过程。
Surface peeling is isothermal bainitic ball gear failure of the main way. In order to improve the service life of the ductile iron gear, it is necessary to study the rule of the ductile contact failure of the ductile iron and to find the measures to improve the anti-spalling ability of the ductile iron. This article is a summary of the first phase of ductile iron contact fatigue test. A conventional ductile iron which had been austempered (austenitizing temperature: 910 ° C) and partially austenitized (austenitizing temperature: 880 ° C) by austempering was measured using a ZYS-6 type contact fatigue tester, Contact fatigue curves and contact fatigue limits of two kinds of austenitized austempering low-sulfur ductile iron were studied. When the test working wheel was changed from isothermal bainitic ductile iron to GCr15 steel, the contact ductility limit The relationship between the isothermal bainitic ferrite matrix and the contact fatigue limit was studied. The contact fatigue failure process of the ductile iron was studied by the metallographic method.