Aperam

Jean-Benoit Moreau

Christophe Cazes

Pierre-Olivier Santacreu

Guillaume Badinier

A method for manufacturing a martensitic stainless steel part, according to which a stainless steel sheet is prepared with the following composition: 0.005%&#x2264;C&#x2264;0.3%; 0.2%&#x2264;Mn&#x2264;2.0%; traces&#x2264;Si&#x2264;1.0%; traces&#x2264;S&#x2264;0.01%; traces&#x2264;P&#x2264;0.04%; 10.5%&#x2264;Cr&#x2264;17.0%; traces&#x2264;Ni&#x2264;4.0%; traces&#x2264;Mo&#x2264;2.0%; Mo+2&#xd7;W&#x2264;2.0%; traces&#x2264;Cu&#x2264;3%; traces&#x2264;Ti&#x2264;0.5%; traces&#x2264;Al&#x2264;0.2%; traces&#x2264;O&#x2264;0.04%; 0.05%&#x2264;Nb&#x2264;1.0%; 0.05%&#x2264;Nb+Ta&#x2264;1.0%; 0.25%&#x2264;(Nb+Ta)/(C+N)&#x2264;8; traces&#x2264;V&#x2264;0.3%; traces&#x2264;Co&#x2264;0.5%; traces&#x2264;Cu+Ni+Co&#x2264;5.0%; traces&#x2264;Sn&#x2264;0.05%; traces&#x2264;B&#x2264;0.1%; traces&#x2264;Zr&#x2264;0.5%; Ti+V+Zr&#x2264;0.5%; traces&#x2264;H&#x2264;5 ppm; traces&#x2264;N&#x2264;0.2%; (Mn+Ni)&#x2265;(Cr&#x2212;10.3&#x2212;80&#xd7;[(C+N)]); traces&#x2264;Ca&#x2264;0.002%; traces&#x2264;rare earth and/or Y&#x2264;0.06%; and the rest being iron and impurities.

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Lille, France

Jean-Benoit Moreau