High speed tool steel having high toughness

Details High speed tool steel having high toughness High speed tool steel having high toughness

C - Chemistry, Metallurgy

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C

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C22C 38/30 (2006.01) C22C 38/22 (2006.01) C22C 38/24 (2006.01) C22C 38/26 (2006.01) C22C 38/28 (2006.01)

Patent

CA 1071904

17/5 HIGH SPEED TOOL STEEL HAVING HIGH TOUGHNESS ABSTRACT OF THE DISCLOSURE A high speed tool steel having high toughness as well as excellent wear resistance and heat resistance characteristics, this steel contains, by weight, C 0.7 - 1.4%, Si 0.5% max., Mn 0.5% max., Cr 3 - 6%, W 1 - 3.2%, Mo 5.5 - 7.5%, V 1 - 3.5%, CO 15% max., N 0.02 - 0.1%, one or more of Ti, Nb, and Zr 0.02 - 0.1% in total and the balance being Fe and incidental impurities. The relationship between tungsten and molybdenum contents of the steel is expressed in the formulated range 12% ? W + 2Mo ? 16%.

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