JPS5487637A - Pressure pipe made of zirconium alloy - Google Patents

Pressure pipe made of zirconium alloy

Info

Publication number
JPS5487637A
JPS5487637A JP15559877A JP15559877A JPS5487637A JP S5487637 A JPS5487637 A JP S5487637A JP 15559877 A JP15559877 A JP 15559877A JP 15559877 A JP15559877 A JP 15559877A JP S5487637 A JPS5487637 A JP S5487637A
Authority
JP
Japan
Prior art keywords
compressive stress
stress
pressure pipe
peening
pipe
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
JP15559877A
Other languages
Japanese (ja)
Other versions
JPS612746B2 (en
Inventor
Tsutomu Masumoto
Saburo Usami
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15559877A priority Critical patent/JPS5487637A/en
Publication of JPS5487637A publication Critical patent/JPS5487637A/en
Publication of JPS612746B2 publication Critical patent/JPS612746B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/186—High-melting or refractory metals or alloys based thereon of zirconium or alloys based thereon

Landscapes

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

Abstract

PURPOSE:To provide a pressure pipe made of Zr alloy used for heavy water reactors or the like with a protective oxidized film on the surface of the body maintaining residual compressive stress through a hot water autoclave treatment at a temperature lower than that of relaxation following peening of the surface. CONSTITUTION:After a drawing of the body of a pressure pipe, a shot peening is applied to smooth fine cracks on the surface thereof employing a steel ball or the like while a residual compressive stress is given up to about 1 mm under the surface. Then, the body of the pipe is inserted into a hot water autoclave and retained for about 5 hours at a temperature below 400 deg.C under which a creep deformation is hard to take place whereby a protective oxidation film 3 is formed on the surface of the body. This makes the residual compressive stress by the peening larger than the stress W' when an inner pressure P is applied on the body of the pipe. Consequently, the inner surface thereof is invariably subjected to a compressive stress allowing hydride 2 to be parallel to the stress thereby minimizing the possibility of flucture due to a delay in hydrogen. In addition, oxidation by cooling water can be prevented.
JP15559877A 1977-12-26 1977-12-26 Pressure pipe made of zirconium alloy Granted JPS5487637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15559877A JPS5487637A (en) 1977-12-26 1977-12-26 Pressure pipe made of zirconium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15559877A JPS5487637A (en) 1977-12-26 1977-12-26 Pressure pipe made of zirconium alloy

Publications (2)

Publication Number Publication Date
JPS5487637A true JPS5487637A (en) 1979-07-12
JPS612746B2 JPS612746B2 (en) 1986-01-27

Family

ID=15609514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15559877A Granted JPS5487637A (en) 1977-12-26 1977-12-26 Pressure pipe made of zirconium alloy

Country Status (1)

Country Link
JP (1) JPS5487637A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210961A (en) * 1981-06-19 1982-12-24 Toshiba Corp Manufacture of fuel cladding pipe for nuclear reactor
JPS6050133A (en) * 1983-08-29 1985-03-19 Toshiba Corp Corrosion resistant zirconium alloy
JPH05209257A (en) * 1991-08-23 1993-08-20 General Electric Co <Ge> Method for annealing to improve nodular corrosion resistance of zircalloy

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210961A (en) * 1981-06-19 1982-12-24 Toshiba Corp Manufacture of fuel cladding pipe for nuclear reactor
JPS6050133A (en) * 1983-08-29 1985-03-19 Toshiba Corp Corrosion resistant zirconium alloy
JPH05209257A (en) * 1991-08-23 1993-08-20 General Electric Co <Ge> Method for annealing to improve nodular corrosion resistance of zircalloy

Also Published As

Publication number Publication date
JPS612746B2 (en) 1986-01-27

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