GB616252A - Improvements in methods of thermally relieving residual stresses in welded metal members or structures - Google Patents
Improvements in methods of thermally relieving residual stresses in welded metal members or structuresInfo
- Publication number
- GB616252A GB616252A GB2955/45A GB295545A GB616252A GB 616252 A GB616252 A GB 616252A GB 2955/45 A GB2955/45 A GB 2955/45A GB 295545 A GB295545 A GB 295545A GB 616252 A GB616252 A GB 616252A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zone
- stress
- weld
- residual
- compressive stress
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
-
- 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
- C21D2281/00—Making use of special physico-chemical means
- C21D2281/02—Making use of special physico-chemical means temperature gradient
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
In a method of thermally relieving residual stress in welded structures containing a zone of residual tensile stress and one or more complementary zones of residual compressive stress, the stress being parallel to the weld, a temperature gradient is established such that the zone of compressive stress is at a temperature sufficiently above that of the zone of tensile stress that the metal in the latter zone is stressed beyond the yield point but not sufficiently high to cause the metal in the zone of compressive stress to yield A temperature gradient of 50-175 DEG C. may be obtained by flame or electrically heating the zone of compressive stress, e.g. a band 4 or 5 inches from the weld, or cooling the zone of tensile stress, e.g. by covering the weld with solid carbon dioxide, or a combination of both; the weld in the first alternative may be kept cool by a jet of air or water. Residual transverse stresses may also be relieved by heating zones containing such stresses, to cause permanent deformation of the metal in such zones. Specification 552,806, [Group XXII], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US616252XA | 1944-02-22 | 1944-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB616252A true GB616252A (en) | 1949-01-19 |
Family
ID=22037011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2955/45A Expired GB616252A (en) | 1944-02-22 | 1945-02-06 | Improvements in methods of thermally relieving residual stresses in welded metal members or structures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB616252A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2193872A1 (en) | 2008-12-04 | 2010-06-09 | Rolls-Royce Deutschland Ltd & Co KG | Method of manufacturing a welded rotor for a gas turbine engine with heat treatment of the weld seam and its heat affected zone with different temperatures |
| CN112052612A (en) * | 2020-08-25 | 2020-12-08 | 中国石油大学(华东) | Rigid-flexible cooperative local heat treatment method for reinforcing rib plate of large-scale pressure-bearing equipment |
-
1945
- 1945-02-06 GB GB2955/45A patent/GB616252A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2193872A1 (en) | 2008-12-04 | 2010-06-09 | Rolls-Royce Deutschland Ltd & Co KG | Method of manufacturing a welded rotor for a gas turbine engine with heat treatment of the weld seam and its heat affected zone with different temperatures |
| CN112052612A (en) * | 2020-08-25 | 2020-12-08 | 中国石油大学(华东) | Rigid-flexible cooperative local heat treatment method for reinforcing rib plate of large-scale pressure-bearing equipment |
| CN112052612B (en) * | 2020-08-25 | 2022-06-07 | 中国石油大学(华东) | Rigid-flexible cooperative local heat treatment method for reinforcing rib plate of large-scale pressure-bearing equipment |
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