CN100395479C - Machining process of high-performance stainless steel and seamless steel pipe - Google Patents
Machining process of high-performance stainless steel and seamless steel pipe Download PDFInfo
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- CN100395479C CN100395479C CNB2006100385866A CN200610038586A CN100395479C CN 100395479 C CN100395479 C CN 100395479C CN B2006100385866 A CNB2006100385866 A CN B2006100385866A CN 200610038586 A CN200610038586 A CN 200610038586A CN 100395479 C CN100395479 C CN 100395479C
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Abstract
The present invention relates to a processing technology of a seamless stainless steel pipe, particularly to a processing technology of a seamless stainless steel pipe with high performance, which is used for the fields of supercritical large-capacity machine units for power station boilers, nuclear power machine units, oil cracking devices, large-scale coal liquefaction devices, etc. The present invention has the following technical processes: the preparation of round steel; the heating of the round steel; hot rolling and perforation; head cut; pickling; coping; lubrication; cold rolling; degreasing; solid solution heat treatment; straightening; pipe cut; albefaction; packaging and warehousing. Copper, niobium, nitrogen, manganese and titanium are added in the round steel, wherein the copper occupies 2.5 to 3.5%, the niobium occupies 0.2 to 0.6%, the nitrogen occupies 0.05 to 0.12%, the manganese is less than and equal to 0.5%, and the titanium occupies 0.07 to 0.13%. The seamless stainless steel pipe with high performance, which is manufactured by the present invention, has the advantages of high temperature resistance, high pressure resistance, corrosion resistance, strong oxidation resistant performance, etc.
Description
Affiliated technical field
The present invention relates to a kind of processing technology of stainless-steel seamless pipe, especially a kind of processing technology that is used for the high-performance stainless steel and seamless steel pipe in fields such as the big capacity unit of overcritical station boiler, nuclear power generating sets, cracking of oil device, large-scale coal liquification device.
Background technique
The station boiler unit of the former use of China is generally below 300MW, greater than the 300MW unit, all from external introduction.And the tubing that adopts on the unit is general austenitic steel, though general austenitic steel has high heat resistance, thermal expansion coefficient is big, poor thermal conductivity, anti-vapor-phase oxidation and high-temperature corrosion resistance are poor, and the cost height.
Summary of the invention
Existing austenitic steel is high temperature resistant in order to overcome, high pressure, corrosivity are poor, and the deficiency that oxidation resistance is weak the invention provides a kind of processing technology of high-performance stainless steel and seamless steel pipe.
The technical solution adopted for the present invention to solve the technical problems is: a kind of processing technology of high-performance stainless steel and seamless steel pipe, adopt following technological process: round steel preparation, round steel heating, hot-puncturing process, crop, pickling, reconditioning, lubricated, cold rolling, degreasing, solution heat treatment, aligning, Pipe Cutting, albefaction, packing warehouse-in; Described round steel adopts argon oxygen decarburization refining to cooperate electroslag remelting and trimming electric furnace process to smelt, added copper Cu, niobium Nb, nitrogen N, manganese Mn and titanium Ti in round steel, wherein copper Cu accounts for 2.5～3.5%, niobium Nb accounts for 0.2～0.6%, nitrogen N accounts for 0.05～0.12%, manganese Mn≤0.5%, titanium Ti account for 0.07～0.13%.
Cu can effectively improve decay resistance, and is the austenite stabilizer element of improving the steel hot-workability.Yet Cu has low melting point, and excessive Cu content causes that hot-workability reduces.Therefore, the content of preferred Cu is 2.5～3.5%.
The precipitation strength of filling the air the carbonitride of Nb and Ti improves material high temperature resistance creep rupture strength, and has played reduction intergranular precipitation, has improved the impact toughness of material.Therefore, the content of preferred Nb is 0.2～0.6%, and the content of Ti is 0.07～0.13%.
N is an austenite stabilizer element of improving the hot-workability of steel, and in addition, N is effective for the corrosion resistance that improves steel.Yet N can cause the rolling delayed fracture of sealing the impact processing part of steel pipe.Therefore, because the reduction of the hot-workability that reduction N content causes is compensated by other element, so N content should minimize, preferred N content is 0.05～0.12%.
Mn is for improving steel mechanical strength effective elements, and makes in the process at steel and to add as oxygen scavenger.In addition, it is by forming the fixedly S in the steel of MnS, and the hot-workability of giving.Be lower than 0.10% content for not effect of hot-workability, surpass 1.00% and then cause low toughness.Therefore, the content of Mn≤0.5%.
Further: in the round steel heating process, heating-up temperature is 980～1150 ℃, and be 60～80min heating time.
Again further: in the hot-puncturing process operation, the hot-puncturing process temperature is greater than 1100 ℃.
Further: in the solution heat treatment operation, heat treatment temperature is 1100～1180, and heat treatment time is 25～30min.
The stainless-steel seamless pipe that the processing technology of high-performance stainless steel and seamless steel pipe of the present invention makes, have advantages such as high temperature resistant, high pressure resistant, corrosion-resistant, that oxidation resistance is strong, can be applicable to running temperature more than 600 ℃, field such as the overcritical station boiler big capacity of pressure more than 30MPa (900 or 1000MW) unit, nuclear power generating sets, cracking of oil device, large-scale coal liquification device.
Embodiment
A kind of processing technology of high-performance stainless steel and seamless steel pipe adopts following technological process: round steel preparation, round steel heating, hot-puncturing process, crop, pickling, reconditioning, lubricated, cold rolling, degreasing, solution heat treatment, aligning, Pipe Cutting, albefaction, packing warehouse-in; Described round steel adopts argon oxygen decarburization refining to cooperate the smelting mode of electroslag remelting and composition fine setting Electrosmelting Of Steel, added copper Cu, niobium Nb, nitrogen N, manganese Mn and titanium Ti in round steel, wherein copper Cu accounts for 2.5～3.5%, niobium Nb accounts for 0.2～0.6%, nitrogen N accounts for 0.05～0.12%, manganese Mn≤0.5%, titanium Ti account for 0.07～0.13%.Wherein: in the round steel heating process, heating-up temperature is 980～1150 ℃, and be 60～80min heating time; In the hot-puncturing process operation, hot-rolled temperature is greater than 1100 ℃; In the solution heat treatment operation, heat treatment temperature is 1100～1180 ℃, and heat treatment time is 25～30min.
Claims (1)
1. the processing technology of a high-performance stainless steel and seamless steel pipe is characterized in that having following technological process: round steel preparation, round steel heating, hot-puncturing process, crop, pickling, reconditioning, lubricated, cold rolling, degreasing, solution heat treatment, aligning, Pipe Cutting, albefaction, packing warehouse-in; Added copper, niobium, nitrogen, manganese and titanium in the described round steel, wherein copper accounts for 2.5～3.5%, niobium accounts for 0.2～0.6%, nitrogen accounts for 0.05～0.12%, manganese≤0.5%, titanium account for 0.07～0.13%; In the round steel heating process, heating-up temperature is 980～1150 ℃, and be 60～80min heating time; In the hot-puncturing process operation, hot-rolled temperature is greater than 1100 ℃; In the solution heat treatment operation, heat treatment temperature is 1100～1180 ℃, and heat treatment time is 25～30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100385866A CN100395479C (en) | 2006-03-03 | 2006-03-03 | Machining process of high-performance stainless steel and seamless steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100385866A CN100395479C (en) | 2006-03-03 | 2006-03-03 | Machining process of high-performance stainless steel and seamless steel pipe |
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| Publication Number | Publication Date |
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| CN1818445A CN1818445A (en) | 2006-08-16 |
| CN100395479C true CN100395479C (en) | 2008-06-18 |
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| CNB2006100385866A Active CN100395479C (en) | 2006-03-03 | 2006-03-03 | Machining process of high-performance stainless steel and seamless steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106456340A (en) * | 2014-05-09 | 2017-02-22 | 奥托·博克保健有限公司 | Prosthetic foot |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376136B (en) * | 2007-08-27 | 2010-09-29 | 江苏宏宝集团有限公司 | Method for producing martensitic stainless steel seamless steel pipe |
| CN101643907B (en) * | 2008-08-07 | 2012-09-05 | 上海奉贤钢管厂 | Corrosion-resistant post-treatment process for stainless steel tube |
| CN101538684B (en) * | 2008-09-23 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Stainless steel tube for brake system of rail vehicle and method for producing same |
| CN101733303B (en) * | 2008-11-27 | 2011-06-15 | 宝山钢铁股份有限公司 | Method for making 17-7PH thick wall seamless pipe |
| CN102019283B (en) * | 2011-01-06 | 2012-04-18 | 重庆钢铁(集团)有限责任公司 | Degreasing method for preventing intercrystalline corrosion of aeronautic stainless pipe |
| CN102513388A (en) * | 2011-11-30 | 2012-06-27 | 常州盛德无缝钢管有限公司 | Manufacture method for inner-threaded steel pipe applied to supercritical or ultra supercritical fossil power unit |
| CN107697855A (en) * | 2017-08-30 | 2018-02-16 | 宁波韧霸货叉有限公司 | A kind of high rigidity fork of forklift truck |
| CN110788141B (en) * | 2019-10-24 | 2021-10-15 | 衡阳华菱钢管有限公司 | Seamless steel tube, manufacturing method and high-pressure gas cylinder thereof |
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| US6485679B1 (en) * | 1999-02-16 | 2002-11-26 | Sandvik Ab | Heat resistant austenitic stainless steel |
| US20030231976A1 (en) * | 2002-03-08 | 2003-12-18 | Atsuro Iseda | Austenitic stainless steel tube excellent in steam oxidation resistance and a manufacturing method thereof |
| CN1668768A (en) * | 2002-07-15 | 2005-09-14 | 住友金属工业株式会社 | Martensitic stainless steel seamless pipe and a manufacturing method thereof |
| CN1715434A (en) * | 2004-06-30 | 2006-01-04 | 宝山钢铁股份有限公司 | Method for producing high strength high toughness x80 pipeline steel and its hot-rolled plate |
| CN1715435A (en) * | 2004-06-30 | 2006-01-04 | 宝山钢铁股份有限公司 | Method for producing X80 pipeline steel having anti-HIC property and its hot-rolled plate |
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- 2006-03-03 CN CNB2006100385866A patent/CN100395479C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6485679B1 (en) * | 1999-02-16 | 2002-11-26 | Sandvik Ab | Heat resistant austenitic stainless steel |
| US20030231976A1 (en) * | 2002-03-08 | 2003-12-18 | Atsuro Iseda | Austenitic stainless steel tube excellent in steam oxidation resistance and a manufacturing method thereof |
| CN1668768A (en) * | 2002-07-15 | 2005-09-14 | 住友金属工业株式会社 | Martensitic stainless steel seamless pipe and a manufacturing method thereof |
| CN1715434A (en) * | 2004-06-30 | 2006-01-04 | 宝山钢铁股份有限公司 | Method for producing high strength high toughness x80 pipeline steel and its hot-rolled plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106456340A (en) * | 2014-05-09 | 2017-02-22 | 奥托·博克保健有限公司 | Prosthetic foot |
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| CN1818445A (en) | 2006-08-16 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Wujin Stainless Steel Pipe Group Co.,Ltd. Assignor: Zhu Guoliang Contract fulfillment period: 2006.7.18 to 2016.7.18 contract change Contract record no.: 2008320000816 Denomination of invention: Machining process of high-performance stainless steel and seamless steel pipe Granted publication date: 20080618 License type: Exclusive license Record date: 20081012 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2006.7.18 TO 2016.7.18; CHANGE OF CONTRACT Name of requester: JIANGSU WUJIN STAINLESS STEEL TUBE FACTORY GROUP C Effective date: 20081012 |
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Owner name: JIANGSU WUJIN STAINLESS CO., LTD. Free format text: FORMER OWNER: ZHU GUOLIANG Effective date: 20120705 |
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Free format text: CORRECT: ADDRESS; FROM: 213111 DONGSHU VILLAGE COMMITTEE, ZHENGLU TOWN, WUJIN DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE TO: 213111 NO.1, WUDENG ROAD(WEST), ZHENGLU TOWN, WUJIN DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120705 Address after: Zheng Lu Wu Cheng Road Wujin District 213111 Jiangsu city of Changzhou province No. 1 Patentee after: Jiangsu Wujin Stainless Steel Co., Ltd. Address before: Zheng Lu Wujin District 213111 Jiangsu city of Changzhou province Dong Shu Cun Wei Qian Dong Shu Patentee before: Zhu Guoliang |