C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
75/117, 148/34
C21D 8/00 (2006.01) C22C 38/04 (2006.01)
Patent
CA 1193117
ABSTRACT OF THE DISCLOSURE A work-hardenable austenitic manganese steel (Hadfield type) is disclosed which has an elongation at rupture of 10% to 80%, as measured according to L = 5d or L = 10d. The invention includes a method for producing the novel steel which has a wide range of applications as castings, forgings and rolled articles. The novel steel has the following contents in percent by weight: 0.7 to 1.7% C; 5.0 to 18.0% Mn; 0 to 3.0% Cr; 0 to 1.0% Ni; 0 to 2.5%. Mo; 0.1 to 0.9% Si; and up to 0.1% P, with the proviso that the carbon:manganese ratio he between 1 : 4 and 1 : 14; said steel including as micro-alloying elements, up to 0.05% of titanium, 0.05% of zirconium and 0.05% of vanadium, with the proviso that the sum of micro-alloying elements be between 0.002% and 0.05% by weight of the steel. A feature of the process of the invention is that the micro-alloying elements are added to the molten metal in the casting ladle.
403779
Fetherstonhaugh & Co.
Vereinigte Edelstahlwerke Aktiengesellschaft (vew)
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