Metal treatment – Compositions – Heat treating
Patent
1989-01-18
1990-11-06
Yee, Deborah
Metal treatment
Compositions
Heat treating
148 12R, 148329, C21D 802, C22C 3804
Patent
active
049683578
ABSTRACT:
A hot-rolled alloy steel plate with fully austenitic structure consisting essentially of 4.5 to 10.5 wt % aluminum, 22 to 36 wt % manganese, 0.4 to 1.25 wt % carbon and at least one of the following constituents, 0.06 to 0.50 wt % titanium, 0.02 to 0.20 wt % niobium and 0.10 to 0.40 wt % vanadium, the balance being iron. Among them, there are some special relationships between aluminum and carbon contents: when the aluminum content is below about 9.5 wt %, the carbon content can reach 1.25 wt %, but when the aluminum content is between 9.5-10.5 wt %, the carbon content should be less than 1.10 wt %. The alloys of this invention may further contain the following constituents to improve the strength without remarkable decrease in ductility: up to 0.5 wt % nickel, up to 0.5 wt % chromium, up to 1.2 wt % silicon, up to 0.5 wt % molybdenum and up to 0.5 wt % tungsten. The present invention also relates to a process for manufacturing the hot-rolled alloy steel plate.
REFERENCES:
patent: 3193384 (1965-07-01), Richardson
National Science Council
Yee Deborah
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