Heat resistant steel and gas turbine components composed of the

Details Heat resistant steel and gas turbine components composed of the Heat resistant steel and gas turbine components composed of the

1989-05-16

1991-04-16

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420109, 148325, 148335, 60909, 416241R, C22C 3844

Patent

active

050080725

ABSTRACT:
A heat resistant steel of the present invention contains 0.05 to 0.2 wt. % of C, less than 0.5 wt. % of Si, less than 0.6 wt. % of Mn, 8 to 13 wt. % of Cr, 1.5 to 3 wt. % of Mo, 2 to 3 wt. % of Ni, 0.05 to 0.3 wt. % of V, 0.02 to 0.2 wt. % in total of either or both of Nb and Ta, 0.02 to 0.1 wt. % of N and the balance substantially Fe. Since a gas turbine of the present invention is constituted by members, such as discs, blades, shafts and so forth, made of alloys of this kind, the gas turbine has a structure in which it is possible to achieve a high level of creep rupture strength and Charpy impact value.

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