CN101862764A - Method for manufacturing large-diameter thick-wall seamless steel pipe - Google Patents
Method for manufacturing large-diameter thick-wall seamless steel pipe Download PDFInfo
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- CN101862764A CN101862764A CN 201010162068 CN201010162068A CN101862764A CN 101862764 A CN101862764 A CN 101862764A CN 201010162068 CN201010162068 CN 201010162068 CN 201010162068 A CN201010162068 A CN 201010162068A CN 101862764 A CN101862764 A CN 101862764A
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Abstract
The invention relates to a method for manufacturing a large-diameter thick-wall seamless steel pipe, which belongs to the field of iron and steel smelting. The method is widely applied to forming a process for manufacturing a large-diameter thick-wall seamless steel pipe which meets the quality requirement on a high-quality steel pipe without extra-heavy type forging and pressing equipment by combining a friction welding technology and a push pipe expanding technology of industries of aerospace, automobiles, petrochemical industry, nuclear power, and the like. Thick-wall steel pipes with the diameter below 700mm are butted into a pipe blank with a certain length by adopting friction welding, and the butted pipe blank is expanded into a demanded specification on a push pipe expanding machine. The large-diameter thick-wall seamless steel pipe which is made of different materials, such as carbon structure, steel alloy structural steel, heat resistant steel, and the like and has different specifications of the outer diameter more than 720mm, the wall thickness 20-130mm and the length not larger than 12,500mm can be produced by adopting the method. The invention can greatly reduce the equipment investment and the production and manufacture cost.
Description
Technical field
The present invention relates to method for manufacturing large-diameter thick-wall seamless steel pipe, belong to field of iron and steel smelting.
Background technology
Along with sustainable development of economy, the manufacturing capacity of heavy caliber thick wall seamless steel tube promotes rapidly.Present φ 700mm is following, supply exceed demand for the heavy caliber thick wall seamless steel tube of wall thickness 20～130mm, and price continues to drop.And the heavy caliber thick wall seamless steel tube that φ 700mm is above, length exceeds 6000mm, owing to can not roll with Pilger, mainly take three kinds of explained hereafter: 1. forge (Conventional Technology, be the flat-die forging formula), need 6000 tons-12000 large-sized forging equipment, the producer that possesses capacity of equipment all can produce.2. the drawing (Manesmamm Technology, promptly German Mannesmann formula) of boring a hole needs large-scale punching, drawing equipment, major vendor: German Mannesmann, SUMITOMO CHEMICAL, China 471 factories.3. vertically extruding (CameronTechnology, be U.S. Cameroon formula) needs extrusion equipment more than 30000 tons, major vendor: U.S. Wei Mangaodeng company, Chinese northern heavy industry.Owing to be subjected to the restriction of capacity of equipment, there is limitation with vertical extrusion process in the perforation drawing process in the steel pipe description.Particularly above-mentioned three kinds of technologies only have minority enterprise to have production capacity, and the steel pipe price is higher.
Summary of the invention
The object of the present invention is to provide a kind of minor caliber pipe to be prepared into heavy caliber pipe, and can satisfy high-quality tube quality requirement, method for manufacturing large-diameter thick-wall seamless steel pipe with cost competitive advantage.
Technical solution:
Preparation method of the present invention:, meet rolling (or other method is produced) steel pipe of the steel pipe of wall thickness requirement below the selection Φ 700mm 1) according to the target steel pipe that will produce;
2) joint preparation, interface flatness≤0.1mm is with the perpendicularity≤0.15mm of steel pipe axis;
3) adopt friction-welding machine with steel pipe to being connected into the pipe of certain-length;
4) overlap that friction welding is produced is repaired, weld seam overlap and steel pipe equating;
5) butt welded seam carries out Non-Destructive Testing, and the non-destructive testing standard that requires to press the finished product steel pipe is carried out;
6) adopt pipe hole enlargement after the pushing tow pipe expander will dock to the specification that requires, every time hole enlargement amount 1.1-1.2;
7) heat treatment;
8) to the qualified steel pipe of heat treatment proofread and correct, finishing, satisfy the finished size requirement;
9) nothing undermines size detection;
10) obtain external diameter 〉=700mm, wall thickness 〉=20mm, length≤12500mm different size, satisfy the heavy caliber thick wall seamless steel tube that quality standard requires.
Thickness of steel pipe 20～130mm of the present invention.
Friction welding (FW) is as a kind of solid-state method of attachment, and faying face does not melt, and the fusion area metal is forging attitude tissue, grain refinement, and dense structure is used widely in branchs of industry such as space flight and aviation, automobile, petrochemical industry, nuclear powers.The particularly appearance of large-scale friction-welding machine is for the friction welding of the following thick-walled seamless steel pipes of φ 700mm provides condition.
The pushing tow expander is characterized in that as a kind of new technology of utilizing small-bore pipe to make large-diameter pipe in the process of hole enlargement, bore increase, contraction in length, wall thickness are constant substantially.Developed country has been applied to this technology surpass the production of (surpassing) critical generating equipment with pipe.
The present invention is directed to the existing limitation of tubulation apparatus on steel pipe bore and length, adopt friction welding technology to carry out the solid phase connection steel pipe of certain-length, bore, utilize pushing tow expander technology to realize the increase (following the shortening of length) of bore again, obtain required heavy caliber thick wall seamless steel tube.This method for manufacturing large-diameter thick-wall seamless steel pipe need not the superduty forging equipment, and tube quality satisfies product requirement, has tangible cost competitive advantage.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
The specific embodiment
Embodiment 1
For example to produce the steel pipe of φ 1200x60x6500mm
1, can select 2 of the steel pipes of φ 580x90x5000mm;
2, joint preparation, interface flatness≤0.1mm is with the perpendicularity≤0.15mm of steel pipe axis;
3, adopt friction-welding machine with steel pipe to being connected into the pipe of φ 580x90x10000mm;
4, the overlap that friction welding is produced is repaired, weld seam overlap and the equating of steel pipe surfaces externally and internally;
5, butt welded seam carries out Non-Destructive Testing, and the non-destructive testing standard that requires to press the finished product steel pipe is carried out;
6, adopt the pipe 4 passage hole enlargements after the pushing tow pipe expander will dock to arrive φ 1200x60x6550mm, every time hole enlargement is than about 1.2;
7, heat treatment;
8, to the qualified steel pipe of heat treatment proofread and correct, finishing, satisfy the finished size requirement;
9, harmless, physics and chemistry and size detection;
10, obtain external diameter φ 1200x60x6500mm, satisfy the heavy caliber thick wall seamless steel tube that quality standard requires.
Claims (1)
1. method for manufacturing large-diameter thick-wall seamless steel pipe is characterized in that, to being connected into the pipe of certain-length, the pipe hole enlargement after will docking on the pushing tow pipe expander is to the specification that requires with the wall thickness steel tube below the Φ 700mm in the employing friction welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010162068 CN101862764A (en) | 2010-04-07 | 2010-04-07 | Method for manufacturing large-diameter thick-wall seamless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010162068 CN101862764A (en) | 2010-04-07 | 2010-04-07 | Method for manufacturing large-diameter thick-wall seamless steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101862764A true CN101862764A (en) | 2010-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010162068 Pending CN101862764A (en) | 2010-04-07 | 2010-04-07 | Method for manufacturing large-diameter thick-wall seamless steel pipe |
Country Status (1)
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| CN (1) | CN101862764A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039313A (en) * | 2010-11-03 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing large-diameter seamless steel pipe for gas cylinder |
| CN102069104A (en) * | 2010-11-30 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing seamless steel tube for big-caliber long tube air bottle in hot rolling mode |
| CN102233510A (en) * | 2011-05-23 | 2011-11-09 | 天津市裕兴钢管有限公司 | Production process of large-caliber straight-slit submerged-arc welding steel pipe |
| CN102720943A (en) * | 2012-06-27 | 2012-10-10 | 德阳钰鑫机械制造有限公司 | Seamless steel pipe for long pipe trailer and manufacturing method for seamless steel pipe |
| CN103624395A (en) * | 2013-09-02 | 2014-03-12 | 内蒙古北方重工业集团有限公司 | Method for manufacturing retained mandrels of seamless steel pipes |
| CN105268753A (en) * | 2015-10-27 | 2016-01-27 | 内蒙古北方重工业集团有限公司 | Extruding machine and method of utilizing extruding machine to manufacture large-diameter thick-wall seamless copper pipe |
| CN110026734A (en) * | 2018-01-11 | 2019-07-19 | 关维良 | A kind of production technology of direct boring method cored steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0138603A2 (en) * | 1983-10-13 | 1985-04-24 | Texas Forge & Tool Limited | Improvements in or relating to rods and pipes |
| US5255487A (en) * | 1990-08-17 | 1993-10-26 | Mannesmann Aktiengesellschaft | Door reinforcement tube |
| CN1918313A (en) * | 2004-12-22 | 2007-02-21 | 新日铁住金不锈钢株式会社 | Welded ferritic stainless steel tube having excellent tube expanding workability |
| CN101032790A (en) * | 2007-04-16 | 2007-09-12 | 吴建均 | Technique of forming air conditioning compressor casing |
| CN101774749A (en) * | 2008-11-24 | 2010-07-14 | 康宁股份有限公司 | Isopipe material outgassing |
-
2010
- 2010-04-07 CN CN 201010162068 patent/CN101862764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0138603A2 (en) * | 1983-10-13 | 1985-04-24 | Texas Forge & Tool Limited | Improvements in or relating to rods and pipes |
| US5255487A (en) * | 1990-08-17 | 1993-10-26 | Mannesmann Aktiengesellschaft | Door reinforcement tube |
| CN1918313A (en) * | 2004-12-22 | 2007-02-21 | 新日铁住金不锈钢株式会社 | Welded ferritic stainless steel tube having excellent tube expanding workability |
| CN101032790A (en) * | 2007-04-16 | 2007-09-12 | 吴建均 | Technique of forming air conditioning compressor casing |
| CN101774749A (en) * | 2008-11-24 | 2010-07-14 | 康宁股份有限公司 | Isopipe material outgassing |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102039313A (en) * | 2010-11-03 | 2011-05-04 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing large-diameter seamless steel pipe for gas cylinder |
| CN102069104A (en) * | 2010-11-30 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing seamless steel tube for big-caliber long tube air bottle in hot rolling mode |
| CN102233510A (en) * | 2011-05-23 | 2011-11-09 | 天津市裕兴钢管有限公司 | Production process of large-caliber straight-slit submerged-arc welding steel pipe |
| CN102233510B (en) * | 2011-05-23 | 2016-06-08 | 天津市裕兴钢管有限公司 | Heavy caliber longitudinal submerged arc welded pipe production technique |
| CN102720943A (en) * | 2012-06-27 | 2012-10-10 | 德阳钰鑫机械制造有限公司 | Seamless steel pipe for long pipe trailer and manufacturing method for seamless steel pipe |
| CN103624395A (en) * | 2013-09-02 | 2014-03-12 | 内蒙古北方重工业集团有限公司 | Method for manufacturing retained mandrels of seamless steel pipes |
| CN105268753A (en) * | 2015-10-27 | 2016-01-27 | 内蒙古北方重工业集团有限公司 | Extruding machine and method of utilizing extruding machine to manufacture large-diameter thick-wall seamless copper pipe |
| CN105268753B (en) * | 2015-10-27 | 2017-09-26 | 内蒙古北方重工业集团有限公司 | A kind of extruder and the method that heavy caliber thick wall seamless copper pipe is prepared using extruder |
| CN110026734A (en) * | 2018-01-11 | 2019-07-19 | 关维良 | A kind of production technology of direct boring method cored steel |
| CN110026734B (en) * | 2018-01-11 | 2021-01-01 | 关维良 | Production process of hollow steel by direct drilling method |
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Open date: 20101020 |