Efficiency of Vanadium Barrier Layer in a Stainless Steel-Titanium Bimetal at a High Temperature

摘要

The efficiency of using a vanadium barrier layer and a bimetallic composition composed of 08Kh18N10T stainless steel + VT1-0 titanium obtained by means of explosion welding in order to prevent occurrence of an intermetallic layer is studied in different temperature ranges. The evolution of the heat-affected zone in the samples subjected to heating to 600, 700, 800, and 900°C with exposure times of 1, 3, 5, and 10 h is studied with the use of scanning electron microscopy and metallography, and also the microhard-ness is measured. It is shown that the vanadium barrier layer reliably prevents mutual diffusion between steel and titanium at a high temperature, which excludes the formation of intermetallic compounds in the heat-affected zone. The efficiency of the barrier layer is evaluated.