Creep resistant, precipitation-dispersion-strengthened, martensi

Details Creep resistant, precipitation-dispersion-strengthened, martensi Creep resistant, precipitation-dispersion-strengthened, martensi

1992-10-07

1994-05-10

Yee, Deborah

Metal treatment

Stock

Ferrous

148326, 148607, 148622, 148328, C22C 3830

Patent

active

053104315

ABSTRACT:
An iron-based, corrosion-resistant, precipitation strengthened, martensitic steel essentially free of delta ferrite for use at high temperatures has a nominal composition of 0.05-0.1 C, 8-12 Cr, 1-5 Co, 0.5-2.0 Ni, 0.41-1.0 Mo, 0.1-0.5 Ti, and the balance iron. This steel is different from other corrosion-resistant martensitic steels because its microstructure consists of a uniform dispersion of fine particles, which are very closely spaced, and which do not coarsen at high temperatures. Thus at high temperatures this steel combines the excellent creep strength of dispersion-strengthened steels, with the ease of fabricability afforded by precipitation hardenable steels.

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"Heat Resistant Steels for Advanced Power Plants", Advanced Materials & Processes, Apr. 1992, by Toshio Fujita, pp. 42-47.

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