Y. Sawaragi et al., A NEW AUSTENITIC ALLOY CONTAINING 3.5-PERCENT VANADIUM RESISTANT TO COAL GASIFIER CORROSION ENVIRONMENT, Materials at high temperatures, 11(1-4), 1993, pp. 176-180
A new alloy containing 26.5% Cr, 39% Ni, 3.5% V, 0.3% Nb and 0.02% N w
as developed for heat exchangers of coal gasification power plants. Th
is alloy is expected temperature sulfidation and aqueous corrosion dur
ing down time. Laboratory-melted alloys of various compositions were p
repared to optimize the alloy composition with respect to mechanical p
roperties. The Greeble test, tensile test, creep rupture test. Charpy
impact test for aged materials, and the Trans-Varestraint test were pe
rformed. Changes in the microstructure of the alloys upon ageing were
investigated by optical and electron microscopy, along with chemical a
nalyses of the precipitates.