Effect of the boride-nitride hardening on the structure and properties of chromium steel deposited with a flux-cored wire

Reliability and durability of pipeline valves are largely determined by the resistance of weld sealing surfaces of its shut-off valve, which in its turn depends on the weld metal properties. To improve the durability of valves a new composition of a high chromium flux-cored wire with a boride compounds complex (BN, TiB2, ZrB2) producing weld composite metal is developed. It is stated that the formation of the martensitic matrix with a reduced structural fragments average size due to appearance of dispersed boride-nitride phases in this metal has resulted in high coating hardness and wear resistance. The original version of this article supplied to AIP Publishing was incomplete and omitted the acknowledgement statement. The full acknowledgement reads: The work was carried out at the expense of a grant from the Russian Science Foundation (No. 17-19-01224).