A composite coating was prepared by oxygen and acetylene thermal spray welding using the powders composed of Ni-based powder and nano-Al 2O 3,sub-micron-Al 2O 3,micron-Al 2O 3.The effects of the load and time on abrasive resistance were studiesd.

• 将微米级、亚微米级、纳米级 3种粒度的Al2 O3 与Ni基自熔性合金制成复合粉末后 ,用氧乙炔焰热喷焊工艺制备出复合涂层 ,研究了载荷大小、磨损时间等对涂层耐磨粒磨损性能的影响。