Effect of the quenching temperature on the creep resistance of 9% Cr-1% W-1% Mo-V-Nb martensite steel

Abstract

The creep resistance of the 9% Cr-1% W-1% Mo steel subjected to quenching from the temperatures of 1050 and 1150°C, cooling in the air, and further tempering at a temperature of 750°C for 3 h has been studied at a temperature of 650°C and applied stresses of 160, 140, and 120 MPa. An increase in the quenching temperature from 1050 to 1150°C leads to a growth in the average size of prior austenite grains from 25 to 93 μm due to the dissolution of MX carbonitride particles enriched in niobium under exposure in the austenite region