Tool stell

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C - Chemistry, Metallurgy

22

C

75/128

C22C 38/24 (2006.01) C22C 33/02 (2006.01) C22C 38/36 (2006.01)

Patent

CA 1339766

A tool steel intended for cold working operations has a very high impact strength and good resistance to wear. The steel is made powder-metallurgically by consolidation of metal powder to a dense body and has the following chemical composition expressed in weight-%: 1-2.5% C, 0.1-2% Si, max 0.3% N, 0.1-2% Mn, 6.5-11% Cr, max 4% Mo, which may be replaced wholly or partly by twice the amount of W, and 3-7% V, wherein up to half the amount of vanadium can be replaced by 1.5 times as much niobium, the maximum V/C ratio being 3.7, and the ratio V/Mo being at least 1.0, the balance being essentially only iron and impurities and accessory elements in normal amounts.

606192

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