CN102776343A - Tunnel steel pipe quenching device and quenching method thereof - Google Patents
Tunnel steel pipe quenching device and quenching method thereof Download PDFInfo
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- CN102776343A CN102776343A CN2012102727399A CN201210272739A CN102776343A CN 102776343 A CN102776343 A CN 102776343A CN 2012102727399 A CN2012102727399 A CN 2012102727399A CN 201210272739 A CN201210272739 A CN 201210272739A CN 102776343 A CN102776343 A CN 102776343A
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Abstract
The invention discloses a tunnel steel pipe quenching device and a tunnel steel pipe quenching method, relating to a seamless steel pipe production device and solving a problem that the current quenching device can not regulate the cooling speed of the steel pipe under different temperatures in the tunnel according to different cooling speeds needed for steel pipe material phase change. The quenching area of a quenching tunnel provided by the invention comprises units, which are independently controlled by a quenching area, a relative slow cooling area and a slow cooling unit respectively. The quenching method comprises the following steps: (1) after a roller drives the steel pipe to enter the quenching area, starting a water pump to carry out large-flow water injection cooling; (2) after the roller drives the steel pipe to enter the relative slow cooling area of the tunnel, starting the water pump to carry out small-flow water injection cooling; (3) after the roller drives the steel pipe to enter the slow cooling area of the tunnel, carrying out gas injection mixed cooling. The quenching device is used for a seamless steel pipe thermal treatment production line so as to precisely adjust the cooling speed at different temperatures of the steel pipe in a quenching process, thereby improving the quality of the steel pipe product.
Description
Technical field
The present invention relates to method for producing seamless steel tube, particularly a kind of tunnel like steel pipe quenching apparatus and quenching method thereof of steel pipe heat-treatment production line.
Technical background
The performance of the tunnel like quenching apparatus of steel pipe heat-treatment production line has material impact to steel pipe final product quality and whole unit production efficiency.
Existing tunnel like steel pipe quenching apparatus, like Fig. 1, shown in 2: roller-way device 1 is 10 ° of angles with tunnel axis, guarantees that steel pipe advances while rotating in quenching process.Quenching tunnel 2 is installed on the tunnel bearing 3, is driven and can be moved up and down by lifting device 4, so that adjustment highly adapts to the steel pipe of different diameter specification.Above roller-way device 1, quenching tunnel 2, tunnel bearing 3, lifting device 4 all are installed on the base 5, become as a whole.During work, steel pipe 6 drives spirals in the tunnel by roller-way, and the steel pipe rotation both can make the steel pipe of red heat not flexible, and steel pipe is evenly cooled off at circumferential direction.Water coolant is supplied with by water pump group outside the tunnel, and tunnel internal sprays cooling by the jet pipe of circular permutation to steel pipe, thereby accomplishes the quenching process of steel pipe.
The principle of iron and steel quench treatment is that austenite directly is transformed into the oversaturated αGu Rongti of a kind of carbon containing, i.e. martensite.This phase transformation is with great speed of cooling, under great condensate depression, takes place.According to Supercooled Austenite Isothermal Transformation Diagram figure (C curve figure), can know: quench obtains martensite, also need in whole process of cooling, all not cool off fast in fact.Key is in C curve nose portion; I.e. cooling fast in 650～550 ℃ TR; And between the quenching temperature to 650 ℃, and below 400 ℃, do not need quick cooling; Particularly especially should not cool off fast, otherwise meeting cause distortion or crack because of the internal stress effect at 300～200 ℃.
The quenching apparatus of prior art, the water main along the steel pipe traffic direction in whole tunnel is arranged as one, and all jet pipes supply water by water inlet is unified, all spray during spray, and the stopping time all stops.Such layout is the flow and the speed of controlled chilling water accurately, adapts to the speed of cooling of phase transformation needs under the steel pipe differing temps, thereby make the quenching quality of steel pipe can not get ensureing.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art; A kind of tunnel like steel pipe quenching apparatus and quenching method thereof are provided; Solving existing quenching apparatus can not be according to the different cooling of tube material phase transformation needs; Adjust steel pipe speed of cooling under the differing temps in the tunnel, thereby influence the problem of steel pipe quenching quality.
The present invention realizes its goal of the invention through following technical scheme.
A kind of tunnel like steel pipe quenching apparatus; Comprise: be the roller-way device of 10 ° of angles with tunnel axis; Be installed in the quenching tunnel on the tunnel bearing; The tunnel bearing is connected with lifting device and is driven by lifting device; Roller-way device, lifting device are installed on the base together with tunnel bearing and quenching tunnel; Quenching tunnel inwall be provided with the tunnel outside the circular permutation jet pipe that is connected of water pump, it is characterized in that: the quenching zone in said quenching tunnel by the quench zone of solid matter ring-type jet pipe, be set forming the unit of independent control respectively than slow cooling district, slow cooling district that the air water mixing jet tube is set of ring-type jet pipe, three said independent unit of controlling are: the solid matter ring-type jet pipe quenching unit that directly is communicated with water pump outside the tunnel; The ring-type jet pipe that directly is communicated with water pump outside the tunnel is than the slow cooling unit; The air water mixing jet tube slow cooling unit that directly is communicated with water pump, source of the gas outside the tunnel.
A kind of quenching method of said tunnel like steel pipe quenching apparatus is characterized in that: said accent quenching method step is following:
1. roller-way drives the steel pipe spirals, behind the entering tunnel quench zone, opens the quench zone water pump, steel pipe is carried out the water spray cooling of big flow with the toroidal nozzle of solid matter;
2. roller-way drives the steel pipe spirals, get into the tunnel than the slow cooling district after, open than slow cooling district water pump the water spray cooling of steel pipe being carried out with toroidal nozzle than low discharge;
3. roller-way drives the steel pipe spirals, behind the entering slow cooling district, tunnel, with toroidal nozzle steel pipe is carried out jet water mixtinite cooling.
The present invention compared with prior art; Because the present invention is under the situation that does not increase devices overall size; Change the quenching zone in quenching tunnel into three sections unit of independent control respectively by one; Can adjust the speed of cooling of steel pipe when differing temps more accurately, make that steel pipe can be maximum in quenching process near ideal quenching curve (the supercooled austenite isothermal transformation C curve of steel), improved the quality of fished pipe.
Description of drawings
Fig. 1 is the structural representation of existing tunnel formula steel pipe quenching device;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is a kind of structural representation of tunnel like steel pipe quenching apparatus;
Fig. 4 is that the A of Fig. 3 is to view.
The present invention is elaborated through preferred embodiment below in conjunction with accompanying drawing.
Embodiment
Like Fig. 3, shown in 4: a kind of tunnel like steel pipe quenching apparatus; Comprise: be the roller-way device 1 of 10 ° of angles with tunnel axis; Be installed in the quenching tunnel 2 on the tunnel bearing 3; Tunnel bearing 3 is connected with lifting device 4 and is driven by lifting device 4, and roller-way device 1, lifting device 4 are installed on the base 5 together with tunnel bearing 3 and quenching tunnel 2,2 inside, quenching tunnel be provided with the tunnel outside the circular permutation jet pipe that is connected of water pump; The quenching zone in said quenching tunnel 2 by the quench zone 2-1 of solid matter toroidal nozzle, be set forming the unit of independent control respectively than slow cooling district 2-2, slow cooling district 2-3 that the air water mixing jet tube is set of toroidal nozzle, three said independent unit of controlling are: the solid matter ring-type jet pipe quenching unit that directly is communicated with water pump outside the tunnel; The ring-type jet pipe that directly is communicated with water pump outside the tunnel is than the slow cooling unit; The air water mixing jet tube slow cooling unit that directly is communicated with water pump, source of the gas outside the tunnel.
A kind of step of tunnel like steel pipe quenching method is following:
1. roller-way drives the steel pipe spirals, behind the entering tunnel quench zone 2-1, opens the quench zone water pump, steel pipe is carried out the water spray cooling of big flow with the toroidal nozzle of solid matter;
2. roller-way drives the steel pipe spirals, get into the tunnel than slow cooling district 2-2 after, open than slow cooling district water pump the water spray cooling of steel pipe being carried out with toroidal nozzle than low discharge;
3. roller-way drives the steel pipe spirals, behind entering slow cooling district, the tunnel 2-3, with toroidal nozzle the jet water mixtinite that steel pipe carries out is cooled off.
Steel pipe drives spirals in the tunnel by roller-way, and quench zone 2-1 carries out the water spray cooling of big flow with the toroidal nozzle of solid matter to steel pipe in the quenching process, makes steel pipe obtain great speed of cooling, guarantees the formation of martensitic stucture.Than the water spray cooling that slow cooling district 2-2 carries out steel pipe with toroidal nozzle, this zone is that outer surface of steel tube begins to carry out the zone that martensitic phase changes to the end of internal surface martensitic transformation, and injection flow rate is little than quench zone.Slow cooling district 2-3 to the jet water mixtinite cooling that steel pipe carries out, makes the steel pipe of accomplishing martensitic transformation drop to room temperature with lower speed of cooling with toroidal nozzle, reduces the residualinternal stress that steel pipe produces in quenching process.
During work, control the hydraulic pressure and the flow in three districts, tunnel respectively, can adjust steel pipe more accurately in the interval speed of cooling of differing temps through water pump group separately.When parameters such as the diameter of processing steel pipe, wall thickness, length change, also can adapt with it through the adjusting of the water yield, what make that steel pipe can be maximum in quenching process approaches ideal quenching curve, improves the quality of fished pipe, reduces the energy consumption of production.
Claims (2)
1. tunnel like steel pipe quenching apparatus; Comprise: be the roller-way device (1) of 10 ° of angles with tunnel axis; Be installed in the quenching tunnel (2) on the tunnel bearing (3); Tunnel bearing (3) is connected with lifting device (4) and is driven by lifting device (4); Roller-way device (1), lifting device (4) are installed on the base (5) together with tunnel bearing (3) and quenching tunnel (2); Inside, quenching tunnel (2) be provided with the tunnel outside the circular permutation jet pipe that is connected of water pump, it is characterized in that: the quenching zone in said quenching tunnel (2) by the quench zone (2-1) of solid matter toroidal nozzle, be set forming the unit of independent control respectively than slow cooling district (2-2), slow cooling district (2-3) that the air water mixing jet tube is set of toroidal nozzle, three said independent unit of controlling are: the solid matter ring-type jet pipe quenching unit that directly is communicated with water pump outside the tunnel; The ring-type jet pipe that directly is communicated with water pump outside the tunnel is than the slow cooling unit; The air water mixing jet tube slow cooling unit that directly is communicated with water pump, source of the gas outside the tunnel.
2. the quenching method of a tunnel like steel pipe quenching apparatus according to claim 1, it is characterized in that: said accent quenching method step is following:
1. roller-way drives the steel pipe spirals, behind the entering tunnel quench zone (2-1), opens the quench zone water pump, steel pipe is carried out the water spray cooling of big flow with the toroidal nozzle of solid matter;
2. roller-way drives the steel pipe spirals, get into the tunnel than slow cooling district (2-2) after, open than slow cooling district water pump the water spray cooling of steel pipe being carried out with toroidal nozzle than low discharge;
3. roller-way drives the steel pipe spirals, behind the entering slow cooling district, tunnel (2-3), with toroidal nozzle steel pipe is carried out jet water mixtinite cooling.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016035103A1 (en) * | 2014-09-01 | 2016-03-10 | Sms Meer S.P.A. | Apparatus and method for quenching rods and tubes |
| CN105910770A (en) * | 2016-06-06 | 2016-08-31 | 江苏武进不锈股份有限公司 | Steel pipe water cooling gas tightness detection integration apparatus |
| CN106853463A (en) * | 2015-12-08 | 2017-06-16 | 财团法人金属工业研究发展中心 | Cooling device |
| TWI616537B (en) * | 2015-11-19 | 2018-03-01 | 財團法人金屬工業研究發展中心 | Method of heat treatment for metal |
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| CN102268523A (en) * | 2011-07-13 | 2011-12-07 | 天津阿瑞斯工业炉有限公司 | Continuous quenching line for large-diameter tube and bar materials |
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2012
- 2012-07-24 CN CN2012102727399A patent/CN102776343A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102268523A (en) * | 2011-07-13 | 2011-12-07 | 天津阿瑞斯工业炉有限公司 | Continuous quenching line for large-diameter tube and bar materials |
Non-Patent Citations (2)
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| 《2008年全国轧钢生产技术会议论文集 》 20081231 张训江等 "宽带板淬火线工艺设备分析" 第717-721页 1-2 , * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016035103A1 (en) * | 2014-09-01 | 2016-03-10 | Sms Meer S.P.A. | Apparatus and method for quenching rods and tubes |
| TWI616537B (en) * | 2015-11-19 | 2018-03-01 | 財團法人金屬工業研究發展中心 | Method of heat treatment for metal |
| CN106853463A (en) * | 2015-12-08 | 2017-06-16 | 财团法人金属工业研究发展中心 | Cooling device |
| CN105910770A (en) * | 2016-06-06 | 2016-08-31 | 江苏武进不锈股份有限公司 | Steel pipe water cooling gas tightness detection integration apparatus |
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Application publication date: 20121114 |