Nitride dispersion-strengthened steels and method of making

Details Nitride dispersion-strengthened steels and method of making Nitride dispersion-strengthened steels and method of making

1987-06-29

1989-07-11

Yee, Deborah

Metal treatment

Compositions

Heat treating

148318, 420 68, 75251, C23C 826

Patent

active

048468991

ABSTRACT:
A low carbon steel has a composition which is ferritic, martensitic or ferritic: martensitic at temperatures of the order of 700.degree. C. and substantially fully austenitic at temperatures in excess of 1000.degree. C. and nitriding of a refractory stable metal nitride former, e.g. titanium, of the alloy is effected while the alloy is in its substantially fully austenitic state so as to produce a fine and homogeneous dispersion of the nitride and thereby enhance the creep strength of the alloy when in its ferritic, martensitic or ferritic: martensitic state.

REFERENCES:
patent: 3512960 (1970-05-01), Brady
patent: 4047981 (1977-09-01), Arnold et al.
patent: 4582679 (1986-04-01), Wilson et al.
Huet et al., "Dispersion-Strengthen Ferritic Steels as Fast-Reactor Structural Material," Nuclear Technology, vol. 24, Nov. 1974, pp. 216-224.

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