Manufacturing method of 110ksi steel grade non-magnetic seamless steel pipe

The invention discloses a 110ksi steel-grade non-magnetic seamless steel pipe and a manufacturing method thereof. The performance of the 110ksi steel-grade non-magnetic seamless steel pipe is that the tensile strength is larger than or equal to 890 MPa, the Rp0.2 yield strength is 850-980 MPa, the e...

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Bibliographische Detailangaben
Hauptverfasser:	FEI ZHIWEI, WANG JINYONG, LIU FUQIANG, GAO YUGUANG, QI XILUN, GAO JIE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL 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 MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses a 110ksi steel-grade non-magnetic seamless steel pipe and a manufacturing method thereof. The performance of the 110ksi steel-grade non-magnetic seamless steel pipe is that the tensile strength is larger than or equal to 890 MPa, the Rp0.2 yield strength is 850-980 MPa, the elongation is larger than or equal to 20%, the hardness is 28-33 HRC, the transverse Charpy V-shaped notch full-size impact energy at the temperature of-10 DEG C is larger than or equal to 50 J, and the magnetic conductivity is smaller than 1.29 * 10 H/m. The manufacturing method of the 110ksi steel grade non-magnetic seamless steel pipe comprises the following steps: S1, rough machining of a blank; s2, performing heat treatment on the blank; s3, finish machining of the blank; s4, hot reaming; s5, hot extrusion; s6, steel pipe heat treatment; s7, straightening and head cutting; s8, acid pickling; s9, coping the steel pipe; s10, cold machining is carried out; and S11, finishing treatment is conducted. The seaml