STAINLESS STEEL PIPE WITH EXCELLENT EROSION RESISTANCE AND MANUFACTURING METHOD THEREOF

The present invention relates to a stainless steel pipe with excellent erosion resistance, which can improve erosion resistance in the inner area of the pipe while maintaining low-temperature toughness, and a manufacturing method thereof. The stainless steel pipe with excellent erosion resistance ac...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, KWANG YUK, AHN, DEOK CHAN, CHAE, DONG CHUL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALLOYS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a stainless steel pipe with excellent erosion resistance, which can improve erosion resistance in the inner area of the pipe while maintaining low-temperature toughness, and a manufacturing method thereof. The stainless steel pipe with excellent erosion resistance according to one embodiment of the present invention is a steel pipe including Cr at 11.0 to 14.0 wt% and having a ferrite factor (FF) of 6 to 9 as expressed by the following formula 1; and based on a thickness of the steel pipe, the inner area has a mixed phase structure of martensite and ferrite, the outer area has a single phase structure of ferrite or a mixed phase structure of ferrite and martensite, and a martensite fraction of the inner area is greater than a martensite fraction of the outer area: [Formula 1] FF = [Cr + 6Si +8Ti + 4Mo + 2Al +4Nb] - [2Mn + 4Ni + 40(C+N)] wherein Cr, Si, Ti, Mo, Al, Nb, Mn, Ni, C and N represent contents (wt%) of respective ingredients.