SE8602172L - METHOD OF IMPROVING REMOVAL PIPES IN A STAINLESS STEEL OR LIKE - Google Patents
METHOD OF IMPROVING REMOVAL PIPES IN A STAINLESS STEEL OR LIKEInfo
- Publication number
- SE8602172L SE8602172L SE8602172A SE8602172A SE8602172L SE 8602172 L SE8602172 L SE 8602172L SE 8602172 A SE8602172 A SE 8602172A SE 8602172 A SE8602172 A SE 8602172A SE 8602172 L SE8602172 L SE 8602172L
- Authority
- SE
- Sweden
- Prior art keywords
- stainless steel
- inside surface
- pipe wall
- steel pipe
- outside
- Prior art date
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
- C21D9/505—Cooling thereof
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To improve remarkably the residual stress of a stainless steel pipe, etc., by heating locally the outside surface positioned on the outside of the inside surface while cooling water is held interposed on the inside surface of the stainless steel pipe, etc., within the range of the quantity of heat input expressed by the specific equation determined from the thickness of the pipe wall and the average radius of the pipe wall and cooling the same. CONSTITUTION:A heating point.B is set on the outside surface positioned on the outside in the radial direction of the point A to be treated on the inside surface of, for example, the stainless steel pipe P while the cooling water W is interposed on the inside surface thereof always at about 0.3mm/sec. A tungsten electrode S of, for example, a TIG welding machine is thereupon operated and the heating point B is locally heated in the range where the quantity Q of heat input Joule/mm is expressed by the equation in a gaseous Ar atmosphere by the arc heat thereof. The stress of the yield point or above is generated to the pipe wall between the heating point B and the inside surface and thereafter the stainless steel pipe P is cooled. In the equation, T; the thickness of the pipe wall (mm), R; the average radius of the pipe wall (mm).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60104200A JPS61264132A (en) | 1985-05-16 | 1985-05-16 | Improvement of residual stress of stainless steel pipe or the like |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8602172D0 SE8602172D0 (en) | 1986-05-13 |
SE8602172L true SE8602172L (en) | 1986-11-17 |
SE466351B SE466351B (en) | 1992-02-03 |
Family
ID=14374332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8602172A SE466351B (en) | 1985-05-16 | 1986-05-13 | PROCEDURE TO PROVIDE RETAINING TENSIONS IN A STAINLESS STEEL ROSE |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS61264132A (en) |
FI (1) | FI81609C (en) |
SE (1) | SE466351B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2642932B2 (en) * | 1987-06-30 | 1997-08-20 | 株式会社 大築 | Manufacturing method of nails for hidden nails |
JP4847885B2 (en) * | 2007-02-02 | 2011-12-28 | 日立Geニュークリア・エナジー株式会社 | Method for reducing residual stress in piping |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59166625A (en) * | 1983-03-10 | 1984-09-20 | Hitachi Zosen Corp | Heat treatment apparatus for tubular body |
JPS6033315A (en) * | 1983-08-02 | 1985-02-20 | Ishikawajima Harima Heavy Ind Co Ltd | Heat treatment of pipe line |
-
1985
- 1985-05-16 JP JP60104200A patent/JPS61264132A/en active Pending
-
1986
- 1986-05-09 FI FI861945A patent/FI81609C/en not_active IP Right Cessation
- 1986-05-13 SE SE8602172A patent/SE466351B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI861945A (en) | 1986-11-17 |
FI81609C (en) | 1990-11-12 |
FI81609B (en) | 1990-07-31 |
SE8602172D0 (en) | 1986-05-13 |
SE466351B (en) | 1992-02-03 |
JPS61264132A (en) | 1986-11-22 |
FI861945A0 (en) | 1986-05-09 |
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