C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/147, 148/31
C22C 38/06 (2006.01) C21D 7/13 (2006.01) C22C 38/04 (2006.01) C22C 38/58 (2006.01)
Patent
CA 1333556
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.
590106
Kirby Eades Gale Baker
National Science Council
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