GB1434038A - Heat treatment of welds - Google Patents

Heat treatment of welds

Info

Publication number
GB1434038A
GB1434038A GB3177573A GB3177573A GB1434038A GB 1434038 A GB1434038 A GB 1434038A GB 3177573 A GB3177573 A GB 3177573A GB 3177573 A GB3177573 A GB 3177573A GB 1434038 A GB1434038 A GB 1434038A
Authority
GB
United Kingdom
Prior art keywords
welds
quenched
july
heated
tempered
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
GB3177573A
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.)
Hughes Tool Co
Original Assignee
Hughes Tool 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 Hughes Tool Co filed Critical Hughes Tool Co
Publication of GB1434038A publication Critical patent/GB1434038A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

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

Abstract

1434038 Heat treating welds HUGHES TOOL CO 4 July 1973 [7 July 1972] 31775/73 Heading C7N A weld and its associated heat-affected zone are heated to a temperature above critical, quenched at a rate which hardens them across the cross-section without causing cracking to provide a strength at least equal to that of one of the components welded and are then finally tempered. In a preferred embodiment the weld zone in steel is initially cooled below the transformation temperature, heated to 1750-1800‹F, quenched to 600 F or below in 1“ minutes and tempered at 1175‹F. Quenching may be by oil, water, air or a water mist. The process is particularly applicable to flash butt welds between drill pipes and their connectors. Apparatus comprises an annular nozzle ring 17 and a perforated internal mandrel 29 each connected to a compressor.
GB3177573A 1972-07-07 1973-07-04 Heat treatment of welds Expired GB1434038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26964872A 1972-07-07 1972-07-07

Publications (1)

Publication Number Publication Date
GB1434038A true GB1434038A (en) 1976-04-28

Family

ID=23028108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3177573A Expired GB1434038A (en) 1972-07-07 1973-07-04 Heat treatment of welds

Country Status (4)

Country Link
AR (1) AR198834A1 (en)
CA (1) CA982916A (en)
GB (1) GB1434038A (en)
IT (1) IT990986B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076164A (en) * 1977-04-21 1978-02-28 United Aircraft Products, Inc. Pre-blistering of braze joints
US4302658A (en) * 1978-03-13 1981-11-24 Allegheny Ludlum Steel Corporation Welding silicon steel

Also Published As

Publication number Publication date
IT990986B (en) 1975-07-10
CA982916A (en) 1976-02-03
AR198834A1 (en) 1974-07-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee