JPS5756191A - Method for dreducing residual stress of piping weld zone - Google Patents
Method for dreducing residual stress of piping weld zoneInfo
- Publication number
- JPS5756191A JPS5756191A JP13150880A JP13150880A JPS5756191A JP S5756191 A JPS5756191 A JP S5756191A JP 13150880 A JP13150880 A JP 13150880A JP 13150880 A JP13150880 A JP 13150880A JP S5756191 A JPS5756191 A JP S5756191A
- Authority
- JP
- Japan
- Prior art keywords
- weld zone
- residual stress
- cooling
- shrinkage
- piping
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE: To reduce residual stress by the tensile stress owing to shrinkage and prevent the occurrence of cracking by fixing both side parts of the weld zone of a piping and cooling the weld zone or near the same.
CONSTITUTION: Both sides of the weld zone 2 of a piping 1 are fixed with ligs 5, 6, so that the distance between the jigs 5, 6 is maintained constant. Next, a cooling tank 3 is provided to the weld zone 2, and low temp. liquid 4 is passed to maintain the weld zone 2 at cryogenic temps. Then, shrinkage by cooling takes place, but since both sides are held fixed, tensile stress is exerted upon the weld zone 2, and residual stress is decreased. For materials such as carbon steels or low alloy steels of which the yield strength increases considerably at low temps., the weld zone 2 is not cooled, and cooling tanks 3' and 3" are provided on both sides of the weld zone 2. Low temp. liquids 4', 4", are passed thereto to apply the tensile stress by shrinkage upon the weld zone 2 of relatively high temps., whereby the residual stress of the weld zone 2 is reduced.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13150880A JPS5756191A (en) | 1980-09-24 | 1980-09-24 | Method for dreducing residual stress of piping weld zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13150880A JPS5756191A (en) | 1980-09-24 | 1980-09-24 | Method for dreducing residual stress of piping weld zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5756191A true JPS5756191A (en) | 1982-04-03 |
Family
ID=15059662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13150880A Pending JPS5756191A (en) | 1980-09-24 | 1980-09-24 | Method for dreducing residual stress of piping weld zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5756191A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895294A (en) * | 1989-03-01 | 1990-01-23 | Thore George M | Method and apparatus for controlling solder flow in metallic members |
-
1980
- 1980-09-24 JP JP13150880A patent/JPS5756191A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895294A (en) * | 1989-03-01 | 1990-01-23 | Thore George M | Method and apparatus for controlling solder flow in metallic members |
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