NEW SOVIET HEAT-RESISTANT STEEL
LIBRARY OF CONGRESS WASHINGTON DC AEROSPACE TECHNOLOGY DIV
Pagination or Media Count:
The article deals primarily with the effect of electroslag remelting Hopkins process on the content of nonmetallic inclusions and hot ductility of EI-847 steel. This steel contains 0.100.15 C, 14-17 Cr, 14-16 Ni, 2.5-3.5 Mo, 0.45-0.85 Nb, 0.8 max Si, 0.8 max Mn, 0.02 max S, and 0.03 max P. Its structure consists of austenite, Cr23C6 chromium carbide, niobium carbonitrides, and the intermetallic compound MoFe2. The austenite in EI-847 steel is distinguished by high stability the austenitic structure is in no way changed by heat treatment or by cold working with considerable reduction. The fully annealed steel is not susceptible to intergranular corrosion even after prolonged 500-7000 hr aging at 550-700 C.
- Metallurgy and Metallography