SU474564A1 - The method of thermomechanical processing of welded joints of low-alloy steel - Google Patents
The method of thermomechanical processing of welded joints of low-alloy steelInfo
- Publication number
- SU474564A1 SU474564A1 SU1924737A SU1924737A SU474564A1 SU 474564 A1 SU474564 A1 SU 474564A1 SU 1924737 A SU1924737 A SU 1924737A SU 1924737 A SU1924737 A SU 1924737A SU 474564 A1 SU474564 A1 SU 474564A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- low
- welded joints
- alloy steel
- thermomechanical processing
- kgm
- Prior art date
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- Heat Treatment Of Articles (AREA)
Description
1one
Изобретение относитс к способам термомеханической обработки сварных соединений низколегированной стали.The invention relates to methods for the thermomechanical treatment of welded joints of low-alloyed steel.
Известен способ термомеханической обработки сварных соединений низколегированной стали, включающий аустенизацию сварного шва и пластическую деформацию в процессе охлаждени при 500-300°С.The known method of thermomechanical treatment of welded joints of low-alloyed steel, including austenization of the weld and plastic deformation in the process of cooling at 500-300 ° C.
Однако он не обеспечивает повышени хладостойкости металла шва.However, it does not improve the cold resistance of the weld metal.
Цель предлагаемого способа - повысить ударную в зкость шва при отрицательных температурах.The purpose of the proposed method is to increase the impact strength of the seam at negative temperatures.
Это достигаетс тем, что пластическую деформацию производ т со степенью 1-4% при охлаждении со скоростью 1-8°С/сек от температуры минимальной устойчивости аустенита и феррито-церлитной области до температуры бейнитного превращени .This is achieved by the fact that plastic deformation is performed with a degree of 1-4% when cooled at a rate of 1-8 ° C / sec from the temperature of the minimum stability of austenite and the ferritic-cerlitic region to the temperature of bainite transformation.
Предлагаемый способ (применительно, например , к сварным швам из стали 17Г1С) включает нагрев сварного соединени до температуры аустенизации -1100°С (может быть использован сварочный нагрев) и пластическую деформацию со степенью 1-4% (оптимальна 3-4%) в процессе охлаждени со скоростью 1-8°С/сек от температуры минимальной устойчивости аустенита в ферритоперлитной области (800°С) до области началаThe proposed method (for example, for welds of steel 17G1S) involves heating the welded joint to an austenitization temperature of -1100 ° C (welding heat can be used) and plastic deformation with a degree of 1-4% (optimal 3-4%) in the process cooling at a rate of 1-8 ° C / s from the temperature of the minimum stability of austenite in the ferriterperlitic region (800 ° C) to the area of the beginning
бейнитного превращени (600°С), привод щую к измельчению структуры и увеличению доли бейнитной составл ющей.bainitic transformation (600 ° C), resulting in the refinement of the structure and an increase in the proportion of the bainitic component.
Опыт показал, что в результате термомеханической обработки ударна в зкость при -70°С металла шва стали 17Г1С в исходном состо нии повысилась до 2,2-8,0 кгм/см (в среднем - 5,0 кгм/см) против 1,0-2,7 кгм/см (в среднем 1,9 кгм/см), а стали 16ХГБАФ - до 3,7-6,2 кгм/см против 1,2-4,2 кгм/см.Experience has shown that, as a result of thermomechanical treatment, the impact viscosity at –70 ° C of the weld metal of 17G1S steel in the initial state increased to 2.2–8.0 kgm / cm (on average — 5.0 kgm / cm) against 1, 0-2.7 kgm / cm (1.9 kgm / cm on average), and steel 16KhGBAF - up to 3.7-6.2 kgm / cm versus 1.2-4.2 kgm / cm.
Применение указанного способа повысит надежность сварных соединений низколегированной стали, за счет повышени ударной в зкости при отрицательных температурах.The application of this method will increase the reliability of welded joints of low-alloyed steel, by increasing the toughness at negative temperatures.
Предмет изобретени Subject invention
Способ термомеханической обработки сварных соединений низколегированной стали, включающий аустенизацию сварного шва и пластическую деформацию в процессе охлаждени , отличающийс тем, что, с целью повышени ударной в зкости сварного шва при отрицательных температурах, пластическую деформацию производ т со степенью 1- 4% при охлаждении со скоростью 1-8°С/сек от температуры минимальной устойчивости аустенита в феррито-перлитной области до температуры начала бейнитного превращени .The method of thermomechanical treatment of welded joints of low-alloyed steel, including austenization of the weld and plastic deformation during the cooling process, characterized in that, in order to increase the toughness of the weld at negative temperatures, plastic deformation is performed with a degree of 4–4 when cooled with 1-8 ° C / sec from the temperature of minimum stability of austenite in the ferritic-pearlitic region to the temperature at which the bainite transformation begins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1924737A SU474564A1 (en) | 1973-05-25 | 1973-05-25 | The method of thermomechanical processing of welded joints of low-alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1924737A SU474564A1 (en) | 1973-05-25 | 1973-05-25 | The method of thermomechanical processing of welded joints of low-alloy steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU474564A1 true SU474564A1 (en) | 1975-06-25 |
Family
ID=20554450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1924737A SU474564A1 (en) | 1973-05-25 | 1973-05-25 | The method of thermomechanical processing of welded joints of low-alloy steel |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU474564A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407682A (en) * | 1981-04-06 | 1983-10-04 | Daido Tokushuko Kabushiki Kaisha | Method of plastic working of metal materials |
| US4612071A (en) * | 1984-02-22 | 1986-09-16 | O'donnell & Associates, Inc. | Mechanical stress improvement process |
| US4683014A (en) * | 1986-03-28 | 1987-07-28 | O'donnell & Associates, Inc. | Mechanical stress improvement process |
-
1973
- 1973-05-25 SU SU1924737A patent/SU474564A1/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407682A (en) * | 1981-04-06 | 1983-10-04 | Daido Tokushuko Kabushiki Kaisha | Method of plastic working of metal materials |
| US4612071A (en) * | 1984-02-22 | 1986-09-16 | O'donnell & Associates, Inc. | Mechanical stress improvement process |
| US4683014A (en) * | 1986-03-28 | 1987-07-28 | O'donnell & Associates, Inc. | Mechanical stress improvement process |
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