GB521259A - Improvements in the manufacture of metal tubing - Google Patents

Improvements in the manufacture of metal tubing

Info

Publication number
GB521259A
GB521259A GB3264238A GB3264238A GB521259A GB 521259 A GB521259 A GB 521259A GB 3264238 A GB3264238 A GB 3264238A GB 3264238 A GB3264238 A GB 3264238A GB 521259 A GB521259 A GB 521259A
Authority
GB
United Kingdom
Prior art keywords
tube
chamber
passes
pipe
temperature
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
GB3264238A
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.)
American Rolling Mill Co
Original Assignee
American Rolling Mill Co
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 American Rolling Mill Co filed Critical American Rolling Mill Co
Priority to GB3264238A priority Critical patent/GB521259A/en
Publication of GB521259A publication Critical patent/GB521259A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • C21D2251/00—Treating composite or clad material
    • C21D2251/02—Clad material

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

521,259. Heat-treating metal tubing. ARMSTRONG, J. J. V. (American Rolling Mill Co:). Nov. 10, 1938, No. 32642. [Class 72] In the manufacture of tube from strip steel in which the latter is formed into a tube while the strip and the latter move longitudinally and wherein the tube is heated to above the transformation temperature of 1670‹F. to unite the juxtapositioned parts of the strip, the moving tube is cooled rapidly down to the upper transformation point, then slowly from that temperature to the lower tranformation temperature of 1330‹F. so as to convert the austenite to a dispersion of cementite in alpha iron. The tubing may then be cooled slowly down to 1000‹F. or less or may be cooled rapidly from this temperature down to 700‹F. at which it may be maintained for ageing before being cooled to room temperature. The tube formed from two strips 1, 2 by rollers 9 passes through a tube 20 containing non-oxidising or reducing gases fed in by a pipe 21 and is heated by electrodes 12, 13 and 14 for the purpose of uniting the outer and inner parts formed by the strips with sealing metal. The tube is then fed by rollers 25 through a water-jacketed pipe 27 through which water is circulated and into the interior of which is fed cooling gas by a pipe 30, the gas leaving by the pipe 31. The tube then passes through another cooling zone similar to the first and separated therefrom by partitions 32. The tube passes through a second cooling zone comprising a chamber 41 having radiating fins 42 and then through a chamber 43 into which molten metal such as lead or a lead and tin alloy is introduced by a pipe 44 and discharged by pipes 45, 46. The tube then passes through a wiper 47 and is then finally cooled in air or'by a water spray 48. In a modification, the chamber 41 may be dispensed with and the chamber 43 lengthened and also a second chamber containing molten metal similar to chamber 43 may be provided to cool the tube still further before it passes through the.wiper 47.
GB3264238A 1938-11-10 1938-11-10 Improvements in the manufacture of metal tubing Expired GB521259A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3264238A GB521259A (en) 1938-11-10 1938-11-10 Improvements in the manufacture of metal tubing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3264238A GB521259A (en) 1938-11-10 1938-11-10 Improvements in the manufacture of metal tubing

Publications (1)

Publication Number Publication Date
GB521259A true GB521259A (en) 1940-05-16

Family

ID=10341808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3264238A Expired GB521259A (en) 1938-11-10 1938-11-10 Improvements in the manufacture of metal tubing

Country Status (1)

Country Link
GB (1) GB521259A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054044A (en) * 1975-06-24 1977-10-18 The Electricity Council Seals for the passage of wire between regions of different pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054044A (en) * 1975-06-24 1977-10-18 The Electricity Council Seals for the passage of wire between regions of different pressure

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