JPS5443836A - Control method for pipe inside shot peening procedure - Google Patents

Control method for pipe inside shot peening procedure

Info

Publication number
JPS5443836A
JPS5443836A JP11092277A JP11092277A JPS5443836A JP S5443836 A JPS5443836 A JP S5443836A JP 11092277 A JP11092277 A JP 11092277A JP 11092277 A JP11092277 A JP 11092277A JP S5443836 A JPS5443836 A JP S5443836A
Authority
JP
Japan
Prior art keywords
pipe
measured
outside diameter
residual stress
deltad
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
JP11092277A
Other languages
Japanese (ja)
Other versions
JPS589811B2 (en
Inventor
Toru Goto
Toshio Yonezawa
Akihiro Kawaguchi
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP11092277A priority Critical patent/JPS589811B2/en
Publication of JPS5443836A publication Critical patent/JPS5443836A/en
Publication of JPS589811B2 publication Critical patent/JPS589811B2/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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE:To carry out the title control and increase the hardness and compressive residual stress of the inside of the pipe by forming a slit in the pipe, in the longitudinal direction, subjected to shot peening (SP); measuring the outside diameter and thickness of the pipe before and after forming the slit; calculating a specific ratio; and using the value. CONSTITUTION:The thickness of small pipe 1 is measured and the inside of pipe 1 is subjected to peening by SP unit 2. Next the outside diameter D of pipe 1 is measured, slit 3 is formed in pipe 1 in the longitudinal direction, and the outside diameter D' is measured. According to the measured values, the average diameter Dm=D-h and a fluctuation in outside diameter DELTAD/D<2>m are calculated. The residual stress or of the inside of pipe 1 in the circumferential direction is obtd. as a primary approximate value according to formulaI, wherein E is an expansion coefficient and nu is Poisson's ratio. DELTAD/D<2>m is closely related to the residual stress and easily measured. In order to prevent the occurence of stress corrosion cracking or the like on the inside of pipe 1, the SP procedure is controlled according to DELTAD/D<2>m so that the hardness and compressive residual stress of the inside are increased.
JP11092277A 1977-09-15 1977-09-15 Management method for shot peening on the inner surface of pipes Expired JPS589811B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11092277A JPS589811B2 (en) 1977-09-15 1977-09-15 Management method for shot peening on the inner surface of pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11092277A JPS589811B2 (en) 1977-09-15 1977-09-15 Management method for shot peening on the inner surface of pipes

Publications (2)

Publication Number Publication Date
JPS5443836A true JPS5443836A (en) 1979-04-06
JPS589811B2 JPS589811B2 (en) 1983-02-23

Family

ID=14548019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11092277A Expired JPS589811B2 (en) 1977-09-15 1977-09-15 Management method for shot peening on the inner surface of pipes

Country Status (1)

Country Link
JP (1) JPS589811B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590826A1 (en) * 1985-11-29 1987-06-05 Aerospatiale AUTOMATIC PACKING INSTALLATION FOR THE FORMATION OF COMPRESSION PRECONTRAINTS
FR2612291A1 (en) * 1987-03-13 1988-09-16 Framatome Sa DEVICE AND METHOD FOR CONTROLLING THE EFFICIENCY OF PARTICLE HAMMING OF THE INTERIOR SURFACE OF A STEAM GENERATOR TUBE
JPH01289530A (en) * 1989-01-12 1989-11-21 O S G Kk Rolling die
GB2412342A (en) * 2004-03-22 2005-09-28 Reservoir Man Method ro reduce the width of a slot in a pipe or tube
US7146835B2 (en) 2003-04-17 2006-12-12 International Roller Technology, Inc. Method and apparatus to reduce slot width in tubular members

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2572965B1 (en) * 1984-11-09 1988-06-10 Framatome Sa METHOD AND APPARATUS FOR HAMMER COMPRESSION OF A STEAM GENERATOR TUBE SET IN A TUBULAR PLATE

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590826A1 (en) * 1985-11-29 1987-06-05 Aerospatiale AUTOMATIC PACKING INSTALLATION FOR THE FORMATION OF COMPRESSION PRECONTRAINTS
FR2612291A1 (en) * 1987-03-13 1988-09-16 Framatome Sa DEVICE AND METHOD FOR CONTROLLING THE EFFICIENCY OF PARTICLE HAMMING OF THE INTERIOR SURFACE OF A STEAM GENERATOR TUBE
US4893490A (en) * 1987-03-13 1990-01-16 Framatome Device and process for controlling the effectiveness of particle hammering of the inner surface of a steam generator tube
JPH01289530A (en) * 1989-01-12 1989-11-21 O S G Kk Rolling die
US7146835B2 (en) 2003-04-17 2006-12-12 International Roller Technology, Inc. Method and apparatus to reduce slot width in tubular members
GB2412342A (en) * 2004-03-22 2005-09-28 Reservoir Man Method ro reduce the width of a slot in a pipe or tube
GB2412342B (en) * 2004-03-22 2006-11-15 Reservoir Man Method to reduce the width of a slot in a pipe or tube

Also Published As

Publication number Publication date
JPS589811B2 (en) 1983-02-23

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