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GB1320186A - Steel tube manufacture - Google Patents

Steel tube manufacture

Info

Publication number
GB1320186A
GB1320186A GB1320186DA GB1320186A GB 1320186 A GB1320186 A GB 1320186A GB 1320186D A GB1320186D A GB 1320186DA GB 1320186 A GB1320186 A GB 1320186A
Authority
GB
United Kingdom
Prior art keywords
tube
seam
rolling
welding
reduced
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VNI I KT I TRUBNOI PROMY
Original Assignee
VNI I KT I TRUBNOI PROMY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VNI I KT I TRUBNOI PROMY filed Critical VNI I KT I TRUBNOI PROMY
Publication of GB1320186A publication Critical patent/GB1320186A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Arc Welding In General (AREA)

Abstract

1320186 Making tubes VSESOJUZNY NAUCHNO - ISSLEDOVATELSKY I KONSTRUKTORSKO - TEKHNOLOGICHESKY INSTITUT TRUBNOI PROMYSHLENNOSTI 24 Sept 1970 45491/70 Heading B3A A method of forming a tube from stainless steel initial tubes, longitudinally welded by inert gas-shielded arc-welding with non-consumable electrodes, comprises removing a layer not less than 0À2 mms. thick from the external surface of the seam, heat treating the tube to restore the composition of the seam metal to the composition prior to the arc-welding and heating the tube in a rolling mill line up to a temperature not higher than 300‹ C. and rolling, the decrease in the tube diameter being less than a value resulting in the formation of internal defects along the seam-main metal boundary and the wall thickness being reduced by at least 50%. In an example the initial tube is reduced by 12 to 15% before heat treatment in a protective atmosphere at 1070‹ to 1100‹ C. for at least 15 minutes, and coated with lubricant for rolling and dried. The rolled rubes are degreased, polished heated for at least 5 mins. at 1050‹ to 1060‹ C.
GB1320186D 1970-09-24 1970-09-24 Steel tube manufacture Expired GB1320186A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4549170 1970-09-24
FR7036070A FR2109190A5 (en) 1970-09-24 1970-10-06

Publications (1)

Publication Number Publication Date
GB1320186A true GB1320186A (en) 1973-06-13

Family

ID=26215987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1320186D Expired GB1320186A (en) 1970-09-24 1970-09-24 Steel tube manufacture

Country Status (2)

Country Link
FR (1) FR2109190A5 (en)
GB (1) GB1320186A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374820A (en) * 2001-03-30 2002-10-30 Schlumberger Holdings Steel tube manufacture associated with perforating gun carriers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374820A (en) * 2001-03-30 2002-10-30 Schlumberger Holdings Steel tube manufacture associated with perforating gun carriers
GB2374820B (en) * 2001-03-30 2003-07-16 Schlumberger Holdings Perforating gun carriers and their methods of manufacture
US6702039B2 (en) 2001-03-30 2004-03-09 Schlumberger Technology Corporation Perforating gun carriers and their methods of manufacture

Also Published As

Publication number Publication date
FR2109190A5 (en) 1972-05-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees