High toughness low yield ratio, high fatigue strength steel plat

Details High toughness low yield ratio, high fatigue strength steel plat High toughness low yield ratio, high fatigue strength steel plat

1994-01-31

1995-10-03

Yee, Deborah

Metal treatment

Stock

Ferrous

148335, 148336, 148654, 148661, C21D 802, C22C 3806

Patent

active

054548837

ABSTRACT:
A steel plate having a high toughness, low yield ratio and high fatigue strength is provided by preserving the fine metallographical microstructure of martensite or bainite while austenitizing extremely fine portions of the microstructure, and during cooling, dispersing the portions as martensite, retained austenite, cementite or mixture thereof in a tempered martensite or tempered bainite phase.

REFERENCES:
patent: 4917738 (1990-04-01), Takano et al.
patent: 5328528 (1994-07-01), Chen
R. N. Caron, G. Krauss, "The Tempering of Fe-C Lath Martensite", Metallurgical Trans. vol. 3, Sep. 1972, pp. 2381-2385. (pp. 2384-2385 FIGS. 4-8).

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