一、概述根据轮齿表面硬度,齿轮可分为软齿面(HB≤350)和硬齿面(HB>350)两类。重型机械的大模数齿轮,过去采用调质状态的软齿面。新近的理论和实践业已证明,提高齿面硬度可以明显提高齿轮的承载能力和延长服役寿命。石油、矿山等机械的大模数齿轮,有设计用渗碳淬火的硬齿面,强 I. Overview According to gear surface hardness, gear can be divided into soft tooth surface (HB≤350) and hardened (HB> 350) two categories. Large modulus gear heavy machinery, the past, the use of quenched and tempered soft tooth surface. Recent theory and practice have proved that increasing the hardness of the gear can significantly improve the carrying capacity of gears and extend the service life. Large-modulus gears for oil, mining and other machinery are designed with hardened hardened surfaces that are carburized and hardened