Steel and method for producing an intermediate product

Details Steel and method for producing an intermediate product Steel and method for producing an intermediate product

C - Chemistry, Metallurgy

22

C

C22C 38/26 (2006.01) C21D 6/00 (2006.01) C22C 38/00 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01) C22C 38/46 (2006.01) C22C 38/48 (2006.01) C22C 38/58 (2006.01) C22C 38/60 (2006.01) C21D 1/02 (2006.01) C21D 7/13 (2006.01) C21D 8/00 (2006.01)

Patent

CA 2424074

The present invention relates to a steel, in particular for tools exposed to corrosion, of the following composition (in mass-%): C: min. 0.02 and max. 0.12 %; Si: max. 1.5 %; Mn: more than 1.0 - 2.50 %; P: max. 0.035 %; S: min. 0.04 % and less than 0.15 %; Cr: more than 8.0 % and less than 12 %; Mo: more than 0.0 % and max. 0.20 %; V: more than 0.0 % and max. 0.25 %; Nb: more than 0.1 % and max. 0.5 %; N: at least 0.02 % and max. 0.12 %; Ni: max. 0.5 %; B: max. 0.005 %; Cu: max. 0.3 %; Al: max. 0.035 %; Sn: max. 0.035 %; As: max. 0.02 %; at least one of the elements Ca, Mg or Ce, wherein the sum of the contents of these elements is at least 0.0002 % and max. 0.015 %; with the remainder being iron and unavoidable impurities.

La présente invention concerne un acier, destiné en particulier à la fabrication d'outils exposés à la corrosion, lequel présente la composition suivante (en pourcent en masse): C: au minimum 0,02 et au maximum 0,12 %; Si: au maximum 1,5 %; Mn: plus de 1,0 - 2,50 %; P: au maximum 0,035 %; S: au minimum 0,04 % et moins de 0,15 %; Cr: plus de 8,0 % et moins de 12 %; Mo: plus de 0,0 % et au maximum 0,20 %; V: plus de 0,0 % et au maximum 0,25 %; Nb: plus de 0,1 % et au maximum 0,5 %; N: au moins 0,02 % et au maximum 0,12 %; Ni: au maximum 0,5 %; B: au maximum 0,005 %; Cu: au maximum 0,3 %; Al: au maximum 0,035 %; Sn: au maximum 0,035 %; As: au maximum 0,02 %; et au moins un des éléments Ca, Mg ou Ce, la somme des teneurs en ces éléments étant égale à au moins 0,0002 % et au maximum à 0,015 %; le solde étant constitué de fer et des impuretés inévitables.

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