喷涂角度对HVOF喷涂WC-10Co-4Cr涂层性能的影响  

Influence of Spraying Angle on Properties of HVOF Sprayed WC-10Co-4Cr Coating

作　　者：万伟伟[1] 沈婕[1] 高峰[1] 侯伟骜[1] 国俊丰[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《热喷涂技术》2011年第1期48-51,共4页Thermal Spray Technology

摘　　要：随着超音速火焰喷涂技术的迅速发展,工业上需要耐磨处理的工件的外形复杂性问题越来越突出,喷涂过程中需要多种角度进行喷涂。本文用GTV-K2喷枪喷涂WC-10Co-4Cr,对不同角度喷涂的涂层性能进行了研究。结果表明:(1)60(°)以下,随着喷涂角度的增加,粉末的沉积效率逐渐升高;(2)60(°)到90(°)之间,沉积效率比较稳定;(3)涂层的显微硬度和结合强度随着喷涂角度的增加呈现先高后低再升高的趋势;(4)45(°)角喷涂获得的涂层硬度和结合强度都是最低的,喷涂过程中应尽量避免,否则应该重新调整工艺参数;(5)喷涂角度尽量控制在60(°)到90(°)之间,适当减小喷涂角度,可以提高涂层的硬度和结合强度。With the extensive use of HVOF spraying technology, more and more work pieces with complex configuration need to be sprayed with different angles. The properties of WC-10Co-4Cr coating sprayed with different angles by GTV-K2 gun are investigated in this paper. These results show the following details.（1） The deposition efficiency of powder increases gradually with the increasing of the spraying angle which is under 60（°）;（2）The deposition efficiency is stable when spraying angle is between 60（°） and 90（°）;（（3）The coating hardness and bond strength change as U shape with the increasing of spraying angle;（4）The coating hardness and bond strength are the lowest at 45（°） spraying angle,which should be avoided in spraying or process parameters should be readjusted;（5）The best spraying angle is between 60（°） and 90（°）. The coating hardness and bond strength could be improved through appropriate reduction of spraying angle.

关 键 词：HVOF喷涂角度 WC-10Co-4Cr 显微硬度 结合强度 沉积效率 

分 类 号：TG174.442[金属学及工艺—金属表面处理]