RU2007146356A - METHOD FOR PRODUCING THICK-WALLED PIPES OF LARGE DIAMETER FROM STEELS OF AUSTENITE CLASS - Google Patents
METHOD FOR PRODUCING THICK-WALLED PIPES OF LARGE DIAMETER FROM STEELS OF AUSTENITE CLASS Download PDFInfo
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- RU2007146356A RU2007146356A RU2007146356/02A RU2007146356A RU2007146356A RU 2007146356 A RU2007146356 A RU 2007146356A RU 2007146356/02 A RU2007146356/02 A RU 2007146356/02A RU 2007146356 A RU2007146356 A RU 2007146356A RU 2007146356 A RU2007146356 A RU 2007146356A
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- diameter
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Abstract
Способ производства толстостенных труб большого диаметра из сталей аустенитного класса, включающий нагрев сверленого слитка, двойную прошивку с промежуточным нагревом и раскатку гильзы на пилигримовом стане, отличающийся тем, что перед первой прошивкой сверленый слиток ЭШП обжимают на стане поперечно-винтовой прокатки без оправки, с посадом по диаметру на 9-13% и утонением стенки на 18-21% за счет подъема диаметра сверления, а затем после нагрева слиток два раза прошивают с промежуточным нагревом и подъемом до первоначального диаметра.A method of manufacturing thick-walled large-diameter pipes from austenitic class steels, including heating a drilled ingot, double piercing with intermediate heating and rolling the sleeves on a pilgrim mill, characterized in that before the first piercing, the ESR drill bit is crimped on a cross-helical rolling mill without mandrel, with a fit in diameter by 9–13% and thinning of the wall by 18–21% due to a rise in the drilling diameter, and then after heating, the ingot is flashed twice with intermediate heating and rise to the original diameter.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007146356/02A RU2386497C2 (en) | 2007-12-13 | 2007-12-13 | Method for production of thick-walled pipes of larger diametre from austenite grade steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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RU2007146356/02A RU2386497C2 (en) | 2007-12-13 | 2007-12-13 | Method for production of thick-walled pipes of larger diametre from austenite grade steel |
Publications (2)
Publication Number | Publication Date |
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RU2007146356A true RU2007146356A (en) | 2009-06-20 |
RU2386497C2 RU2386497C2 (en) | 2010-04-20 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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RU2007146356/02A RU2386497C2 (en) | 2007-12-13 | 2007-12-13 | Method for production of thick-walled pipes of larger diametre from austenite grade steel |
Country Status (1)
Country | Link |
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RU (1) | RU2386497C2 (en) |
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- 2007-12-13 RU RU2007146356/02A patent/RU2386497C2/en not_active IP Right Cessation
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Publication number | Publication date |
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RU2386497C2 (en) | 2010-04-20 |
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Legal Events
Date | Code | Title | Description |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20091214 |
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NF4A | Reinstatement of patent |
Effective date: 20121120 |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20181214 |