Deposition of Pseudo-Alloy Coatings by Electric Arc Metallization

摘要

Pseudo alloys are composite materials produced by various methods from the metal phases insoluble in each other. The components of pseudo alloys, as a rule, are sharply distinguished by their physicom-echanical properties. In this paper, the method of deposition of coatings with a pseudo-alloy structure by the method of electric arc metallization is studied. The main factors influencing the structure of coatings are determined, and the data obtained during metallographic studies of coatings sprayed are presented. The effects of heat released at the cathode and anode on the shape of the melting fronts of the wires are studied. It is determined that, with a significant difference in the specific thermal energy and an unsuccessful choice of the polarity of the electrodes, the melting of the wires is uneven and will cause a significant separation of metals in the coating. The paper shows that the use of more refractory wire as a cathode leads to separate deposition of droplets of dissimilar metals. In addition, the microhardness of the resulting pseudo-alloy coating is investigated.