JPS5545520A - Butt welding method of centrifugal force cast pipe for heat resistance - Google Patents

Butt welding method of centrifugal force cast pipe for heat resistance

Info

Publication number
JPS5545520A
JPS5545520A JP11744678A JP11744678A JPS5545520A JP S5545520 A JPS5545520 A JP S5545520A JP 11744678 A JP11744678 A JP 11744678A JP 11744678 A JP11744678 A JP 11744678A JP S5545520 A JPS5545520 A JP S5545520A
Authority
JP
Japan
Prior art keywords
welding
weld metal
temperature
pass
heat resistance
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
JP11744678A
Other languages
Japanese (ja)
Other versions
JPS577033B2 (en
Inventor
Takuo Kawai
Katsuro Takemura
Toshikazu Shibazaki
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.)
Chiyoda Chemical Engineering and Construction Co Ltd
Original Assignee
Chiyoda Chemical Engineering and Construction Co 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 Chiyoda Chemical Engineering and Construction Co Ltd filed Critical Chiyoda Chemical Engineering and Construction Co Ltd
Priority to JP11744678A priority Critical patent/JPS5545520A/en
Publication of JPS5545520A publication Critical patent/JPS5545520A/en
Publication of JPS577033B2 publication Critical patent/JPS577033B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

PURPOSE: To obviate the production of creep cracking in weld metal by performing welding of the second and subsequent pass after root pass welding by making the temperature of the already built-up weld metal higher than the temperature of the base metal.
CONSTITUTION: Welding II of the second and subsequent passes after the root pass welding I is performed is accomplished by making the temperature of the already built-up weld metal higher than the temperature of the base metals 3, 3. As a method for this, the welding II is accomplished is succession to the excecution of the welding I without cooling the weld zone thereof. Or when the temperature of the already built-up weld metal has dropped after the root pass or second pass welding, there is a method of heating said weld metal with a TIG welding torch or the like and built up the next pass by rewelding a part thereof. According to this method, the flow of heat at the cooling of the weld metal 2 becomes less in the weld metal 1 and more in the base metals and the columnar crystals having a centrain angle to both of the axial direction (Y direction) and circumferential direction (X directin) grow. Hence, the weld metal having good creep repture and ductility for the X, Y diections may by obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP11744678A 1978-09-26 1978-09-26 Butt welding method of centrifugal force cast pipe for heat resistance Granted JPS5545520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11744678A JPS5545520A (en) 1978-09-26 1978-09-26 Butt welding method of centrifugal force cast pipe for heat resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11744678A JPS5545520A (en) 1978-09-26 1978-09-26 Butt welding method of centrifugal force cast pipe for heat resistance

Publications (2)

Publication Number Publication Date
JPS5545520A true JPS5545520A (en) 1980-03-31
JPS577033B2 JPS577033B2 (en) 1982-02-08

Family

ID=14711846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11744678A Granted JPS5545520A (en) 1978-09-26 1978-09-26 Butt welding method of centrifugal force cast pipe for heat resistance

Country Status (1)

Country Link
JP (1) JPS5545520A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62230477A (en) * 1986-02-25 1987-10-09 Hitachi Constr Mach Co Ltd Butt welding method for piping for high pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62230477A (en) * 1986-02-25 1987-10-09 Hitachi Constr Mach Co Ltd Butt welding method for piping for high pressure

Also Published As

Publication number Publication date
JPS577033B2 (en) 1982-02-08

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