中文摘要：

为解决青铜蜗轮耐磨性差、疲劳强度低等问题，将新型涂层技术应用到钢蜗轮传动中。开展蜗杆传动弹性啮合分析、蜗轮齿面磨损分析和轮齿稳态温度场仿真分析，建立材料特性与蜗杆副应力场、磨损特性及温度场之间的关系，提出评价蜗杆副材料啮合性能、耐磨性及抗胶合能力的方法。在20Cr钢表面制备了超微细磷酸锰转化涂层和硫化亚铁固体润滑涂层，在摩擦磨损试验机上对涂层标准试件的摩擦学性能进行了评价，在传动试验台上对两种涂层钢蜗杆副进行传动性能综合试验。结果表明：两种涂层均具有优良的减摩耐磨性能，涂层钢蜗杆副较之未涂层钢蜗杆副缩短了跑合时间，具有更高的传动效率和更优良的抗胶合能力。上述研究为实现蜗杆传动以钢蜗轮替代青铜蜗轮的目标打下了基础，具有一定的理论意义和工程实用价值。

英文摘要：

In order to solve the problems of poor wear resistance and low fatigue strength of bronze worm wheel, new functional coating on the steel worm wheel is investigated. After the elastic contact analysis, tooth wear and bulk temperature on the worm gearing, the relational model between the material properties and stress, wear ratio and temperature on the tooth is established. A method is presented to evaluate the meshing performance, wear resistance, and anti-scuffing of worm gearing. Superfine manganese phosphate conversion coating and ferrous sulfide solid lubricant coating are formed on the surface of 20Cr steel by means of new processes. The tribological properties of the coatings are investigated on a fi＇iction and wear test machine. The steel worm gearings with the two coatings are tested on the transmission test-bed. The experimental results show that the steel worm gear with the coatings can reduce the running-in time, and improve the transmission efficiency and anti-scuffing capacity. The approach is very useful to the substituion of steel worm gearing for bronze worm gearing.