A PROCESS OF PRODUCING AN AUSTENITIC STAINLESS STEEL TUBE

A process of producing an austenitic stainless steel tube comprises the steps of:a) producing an ingot or a continuous casted billet of the austenitic stainless steel,b) hot extruding the ingot or the billet obtained from step a) into a tube,c) cold rolling the tube obtained from step b) to a final...

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Bibliographische Detailangaben
Hauptverfasser:	KÖNBERG, Erik, SVEDBERG, Daniel
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A process of producing an austenitic stainless steel tube comprises the steps of:a) producing an ingot or a continuous casted billet of the austenitic stainless steel,b) hot extruding the ingot or the billet obtained from step a) into a tube,c) cold rolling the tube obtained from step b) to a final dimension thereof.The outer diameter D of the cold rolled tube is 70-250 mm and the thickness t thereof is 6-25 mm, and the cold rolling step is performed such that the following formula is satisfied:(2.5×Rc+1.85×Rh−17.7×Q)=(Rp0.2target+49.3−1073×C−21Cr−7.17×Mo−833.3×N)±Z (1)wherein Rp0.2target is targeted yield strength and is 750≤Rp0.2target≤1000 MPa, 30≤Rc≤75%, 50%≤Rh≤90%, 1≤Q≤3.6, and Z is 65.