表面处理和涂层技术在齿轮上的应用初探

利用气相物理沉积(PVD)技术和磁过滤弧源沉积的方法(DFAD),在由20CrMo制造的直齿圆柱齿轮表面分别制备了TiN以及C:N薄膜,并在齿轮传动实验台上进行了性能测试.结果表明:齿轮表面上覆C:N薄膜后,在1 800 rpm,12 Nm的工况下,连续运行50 h,对齿轮表面在体式显微镜下进行观察,薄膜无明显破损,而未覆膜的淬火齿轮表面已经失效.因此,齿轮表面覆膜对改善齿轮的减摩抗磨性的效果是十分明显的,也是切实可行的.同时,还探讨了PVD技术在齿轮传动中应用时出现的问题,如用常用的多弧磁控溅射技术在齿轮表面涂覆TiN膜,因温度太高导致渗碳淬火齿轮表面硬度因回火而降低,无法正常使用,采用磁过滤弧源沉积的方法对齿轮表面进行覆膜,能获得满意效果.

Surface Treatment and Coating Technologies on Gears

TiN and C:N coatings are made on 20CrMo gears by PVD(Physical Vapour Deposition) technology and DFAD(Direct current Filtered Arc Deposition) technology. Then the authors puts forward the test rig, working under the conditions of 1 800 rpm,12 N.m for 50 h, and the observations by body-microscope show that reducing wear and anti-wearing performance greatly enhanced when C:N film is used, TiN coatings can however, because the hardness of gears is evidently decreased when coating was processing. Direct current Filtered Arc Deposition(DFAD) technology are used on gears to improve the performance of reducing wear and anti-wearing.