SE8602172L - METHOD OF IMPROVING REMOVAL PIPES IN A STAINLESS STEEL OR LIKE - Google Patents

METHOD OF IMPROVING REMOVAL PIPES IN A STAINLESS STEEL OR LIKE

Info

Publication number
SE8602172L
SE8602172L SE8602172A SE8602172A SE8602172L SE 8602172 L SE8602172 L SE 8602172L SE 8602172 A SE8602172 A SE 8602172A SE 8602172 A SE8602172 A SE 8602172A SE 8602172 L SE8602172 L SE 8602172L
Authority
SE
Sweden
Prior art keywords
stainless steel
inside surface
pipe wall
steel pipe
outside
Prior art date
Application number
SE8602172A
Other languages
Swedish (sv)
Other versions
SE8602172D0 (en
SE466351B (en
Inventor
T Umemoto
Y Tanaka
Original Assignee
Ishikawajima Harima Heavy Ind
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 Ishikawajima Harima Heavy Ind filed Critical Ishikawajima Harima Heavy Ind
Publication of SE8602172D0 publication Critical patent/SE8602172D0/en
Publication of SE8602172L publication Critical patent/SE8602172L/en
Publication of SE466351B publication Critical patent/SE466351B/en

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
    • C21D9/505—Cooling thereof
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D9/085—Cooling or quenching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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

PURPOSE:To improve remarkably the residual stress of a stainless steel pipe, etc., by heating locally the outside surface positioned on the outside of the inside surface while cooling water is held interposed on the inside surface of the stainless steel pipe, etc., within the range of the quantity of heat input expressed by the specific equation determined from the thickness of the pipe wall and the average radius of the pipe wall and cooling the same. CONSTITUTION:A heating point.B is set on the outside surface positioned on the outside in the radial direction of the point A to be treated on the inside surface of, for example, the stainless steel pipe P while the cooling water W is interposed on the inside surface thereof always at about 0.3mm/sec. A tungsten electrode S of, for example, a TIG welding machine is thereupon operated and the heating point B is locally heated in the range where the quantity Q of heat input Joule/mm is expressed by the equation in a gaseous Ar atmosphere by the arc heat thereof. The stress of the yield point or above is generated to the pipe wall between the heating point B and the inside surface and thereafter the stainless steel pipe P is cooled. In the equation, T; the thickness of the pipe wall (mm), R; the average radius of the pipe wall (mm).
SE8602172A 1985-05-16 1986-05-13 PROCEDURE TO PROVIDE RETAINING TENSIONS IN A STAINLESS STEEL ROSE SE466351B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60104200A JPS61264132A (en) 1985-05-16 1985-05-16 Improvement of residual stress of stainless steel pipe or the like

Publications (3)

Publication Number Publication Date
SE8602172D0 SE8602172D0 (en) 1986-05-13
SE8602172L true SE8602172L (en) 1986-11-17
SE466351B SE466351B (en) 1992-02-03

Family

ID=14374332

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8602172A SE466351B (en) 1985-05-16 1986-05-13 PROCEDURE TO PROVIDE RETAINING TENSIONS IN A STAINLESS STEEL ROSE

Country Status (3)

Country Link
JP (1) JPS61264132A (en)
FI (1) FI81609C (en)
SE (1) SE466351B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2642932B2 (en) * 1987-06-30 1997-08-20 株式会社 大築 Manufacturing method of nails for hidden nails
JP4847885B2 (en) * 2007-02-02 2011-12-28 日立Ｇｅニュークリア・エナジー株式会社 Method for reducing residual stress in piping

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59166625A (en) * 1983-03-10 1984-09-20 Hitachi Zosen Corp Heat treatment apparatus for tubular body
JPS6033315A (en) * 1983-08-02 1985-02-20 Ishikawajima Harima Heavy Ind Co Ltd Heat treatment of pipe line

Also Published As

Publication number Publication date
FI861945A (en) 1986-11-17
FI81609C (en) 1990-11-12
FI81609B (en) 1990-07-31
SE8602172D0 (en) 1986-05-13
SE466351B (en) 1992-02-03
JPS61264132A (en) 1986-11-22
FI861945A0 (en) 1986-05-09

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