Patent ID: 6305078
Filing Date: 2001-10-23
Classification: C22C,F01D,Y10T

Abstract:
to 0.18 wt % of C, 0.25 wt % or less of Si, 0.90 wt % or less of Mn, 8.0 to 13.0 wt % of Cr, 2 to 3 wt % or less of Ni, 1.5 to 3.0 wt % of Mo, 0.05 to 0.35 wt % of V, 0.02 to 0.20 rwt % in total of one kind or two kinds of Nb and Ta, and 0.02 to 0.10 wt % of N to prepare an ingot, and forging the ingot;quenching the ingot by heating and keeping the ingot to and at a temperature of 1000 to