JPS56150134A - Prevention of stress corrosion cracking - Google Patents

Prevention of stress corrosion cracking

Info

Publication number
JPS56150134A
JPS56150134A JP5220080A JP5220080A JPS56150134A JP S56150134 A JPS56150134 A JP S56150134A JP 5220080 A JP5220080 A JP 5220080A JP 5220080 A JP5220080 A JP 5220080A JP S56150134 A JPS56150134 A JP S56150134A
Authority
JP
Japan
Prior art keywords
stress corrosion
corrosion cracking
pipe
cracking
propagating
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.)
Granted
Application number
JP5220080A
Other languages
Japanese (ja)
Other versions
JPS6256208B2 (en
Inventor
Tadahiro Umemoto
Kazuo Yoshida
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP5220080A priority Critical patent/JPS56150134A/en
Publication of JPS56150134A publication Critical patent/JPS56150134A/en
Publication of JPS6256208B2 publication Critical patent/JPS6256208B2/ja
Granted 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

Abstract

PURPOSE:To effectively prevent stress corrosion cracking from occurring and also prevent cracks, if any, from propagating by a method wherein a surface of a part of a stainless steel pipe contacted with a liquid and having residual stresses is melted and then solidified to improve the structure thereof, while compressive stresses are caused to remain at other surfaces of the pipe. CONSTITUTION:Both the inside and outside surfaces of an austenitic stainless steel pipe used as a cooling-water pipe of a nuclear reactor or the like are contacted with the liquid. The surface of the pipe where the residual stresses are present is melted by using an inert-gas tungsten arc torch and is solidified to obtain a dendritic structure. Consequently, the compressive stresses remain at other surfaces to prevent the stress corrosion cracking. Accordingly, since the chromium carbide once precipitated is dissolved into austenite, chromium is distributed in crystal grains more uniformly to enhance the corrosion resistance of the steel, while the resultant dendritic structure enhances resistance to cracking. In addition, even if stress corrosion cracking should occur, the crack is prevented from propagating into the interior of the steel.
JP5220080A 1980-04-19 1980-04-19 Prevention of stress corrosion cracking Granted JPS56150134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5220080A JPS56150134A (en) 1980-04-19 1980-04-19 Prevention of stress corrosion cracking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5220080A JPS56150134A (en) 1980-04-19 1980-04-19 Prevention of stress corrosion cracking

Publications (2)

Publication Number Publication Date
JPS56150134A true JPS56150134A (en) 1981-11-20
JPS6256208B2 JPS6256208B2 (en) 1987-11-25

Family

ID=12908136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5220080A Granted JPS56150134A (en) 1980-04-19 1980-04-19 Prevention of stress corrosion cracking

Country Status (1)

Country Link
JP (1) JPS56150134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237319A (en) * 1985-08-10 1987-02-18 Ishikawajima Harima Heavy Ind Co Ltd Method for repairing metallic vessel or the like
JPS63171828A (en) * 1987-01-12 1988-07-15 Ishikawajima Harima Heavy Ind Co Ltd Improvement of residual stress of double pipes or the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237319A (en) * 1985-08-10 1987-02-18 Ishikawajima Harima Heavy Ind Co Ltd Method for repairing metallic vessel or the like
JPS63171828A (en) * 1987-01-12 1988-07-15 Ishikawajima Harima Heavy Ind Co Ltd Improvement of residual stress of double pipes or the like

Also Published As

Publication number Publication date
JPS6256208B2 (en) 1987-11-25

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