FORMATION OF WEAR- AND CORROSION-RESISTANT ARC SPRAY COATINGS FROM CORED WIRE

Abstract

The two possible ways of improving the functional properties of arc spray coatings from cored wires (CWs) were analyzed. The first of them is associated with the addition of borax and boron oxide to the charge of CW 90Cr17B2MnSi to increase the homogeneity of the coating, and the second one – with the use of a technological factor of influence, such as the supersonic spraying mode using the increased pressure of the metal-air flow. The microhardness, structural and phase analysis, abrasive wear resistance under the conditions of rigidly fixed abrasive and corrosion resistance in 3% NaCl aqueous solution were used to certify the coatings. It was shown that both proposed approaches provide an opportunity to improve the properties of coatings from CWs. In particular, their homogeneity and microhardness, abrasive wear resistance under the conditions of rigidly fixed abrasive and corrosion resistance increased.