Strengthening of face impulse seals rings by electroerosive alloying method

Zhukov A. N.

Zhukov A. N. Sumy National Agrarian University

Keywords: steel, nickel alloy, beryllium bronze, coating, electroerosive, cementation

Abstract

The results of the metallographic and durametric studies of the samplex made of steel 40X (40H), 12X18H10T (12H18N10T) and 38X2МЮA (38X2MUA) steel grades; nickel alloy ХН58МБЮД (HN58MBUD) and beryllium bronze БрБ2 (BrB2) with combined electroerosive coatings are presented. It has been found that the most preferable coatings for the steel substrates are the strengthening coatings having the composition of BK8 + Cu + BK8 (WC8+Cu+WC8), and those for the nickel alloy of ХН58МБЮД (HN58BUD) are the ones having the compositions of BK8 + BK8 + Cu (WC8+W8+Cu) and BK8 + BK8 + Ni (WC8+WC8+Ni) that are formed on the surfaces previously cemented by the electroerosive alloying method (CEEA). To strengthen beryllium bronze, these is recommended the method of electroerosive alloying (EEA) by a chromium electrode with preliminary and final CEEA.