Aubert & Duval

Erasteel Sas

Erasteel

Fredrik Sandberg

Johanna André

Jacques Bellus

Stefan Sundin

Atman Benbahmed

Delphine Rébois

M Atman Benbahmed

Johanna AndrÉ

A steel alloy intended for cutting applications and hot working tools, comprising, in weight percent (wt. %), C: 0.40-1.2 wt. %, Si: 0.30-2.0 wt. %, Mn: max 1.0 wt. %, Cr: 3.0-6.0 wt. %, Mo: 0-4.0 wt. %, W: 0-8.0 wt. %, wherein (Mo+W/2)&#x2265;3.5 wt. %, Nb: 0-4.0 wt. %, V: 0-4.0 wt. %, wherein 1.0 wt. %&#x2264;(Nb+V)&#x2264;4.0 wt. %, Co: 25-40 wt. %, S: max 0.30 wt. %, N: max 0.30 wt. %, the balance being Fe and unavoidable impurities.

Steel alloy and a tool

The present invention relates to a steel composition carburizable and/or nitritable, comprising, in percentages by weight of the total composition: It further relates to the method of production thereof, the steel blank obtained and a mechanical device comprising the latter.

Steel composition

A carburisable steel alloy suitable for bearing components comprising, in percent by weight: C 0.05-0.5 wt. % Cr 2.5-5.0 wt. %, Mo 4-6 wt. %, W 2-4.5 wt. %, V 1-3 wt. %, Ni 2-4 wt. %, Co 2-8 wt. %, optionally one or more of the following elements: Nb 0-2 wt. % N 0-0.5 wt. % Si 0-0.7 wt. %, Mn 0-0.7 wt. %, Al 0-0.1 5 wt. %, wherein the combined amount of Nb+V is within the range 1-3.5 wt. %, the combined amount of C+N is within the range 0.05-0.5 wt. %, the balance being Fe and unavoidable impurities.

Steel alloy and a component comprising such a steel alloy

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Uppsala, Sweden

Fredrik Sandberg