To improve the wear resistance of the 20 steel,the oxygen-ethyne flame spraying technique was employed to prepare the Co-base WC composite spraying-welding coatings with different WC contents.

• 为提高20钢的耐磨料磨损性能,利用氧-乙炔火焰喷涂的方法制备了不同WC含量的钴基WC复合喷熔层。