CN103128108B - A kind of online controlled cooling method and device improving obdurability after the hot rolling of HFW welded tube - Google Patents
A kind of online controlled cooling method and device improving obdurability after the hot rolling of HFW welded tube Download PDFInfo
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Abstract
A kind of online controlled cooling method and device improving obdurability after the hot rolling of HFW welded tube, first HFW welded tube is heated to more than austenitizing phase transition temperature 80 ~ 200 DEG C, then carry out the pipe that hot rolling tube reducing obtains required specification, make the pipe blank rotary still more than phase transition temperature be chilled to temperature required soon by online controlled cooling device subsequently.Described online controlled cooling device comprises variable frequency pump, water jet, nozzle and transmission device; Described water jet structure ringwise, and its water inlet pipe is connected with the delivery port of variable frequency pump, water jet inwall is uniform nozzle circumferentially; Described transmission device is arranged between water jet, drives HFW welded tube to rotate with certain speed and advances.Present invention achieves the cooling uniformity along steel pipe circumference, axis and wall thickness direction, make the microstructure of welded tube obtain refinement, improve the obdurability of full body, obtain good combination property, simultaneously cost-saving, reduce resource and energy resource consumption.<!--1-->
Description
Technical field
The invention belongs to high-frequency straight seam welded pipe manufacturing technology field, be specifically related to a kind of online controlled cooling method and the device that improve obdurability after the hot rolling of HFW welded tube.
Background technology
In oil well pipe manufacturing process, no matter be seamless pipe or HFW(HighFrequencyWelding) welded pipe, in order to enhance productivity, caliber and wall thickness are changed be easy to control, generally to adopt hot tensile strength reducing process technology, thermo-mechanical rolling under heated condition and drawing are carried out to shell, again austenitizing is there is owing to organizing after hot rolling, if phase transformation is not thereafter controlled, just tubular body can be caused to organize thick, cause intensity and toughness to decline to a great extent, be difficult to meet the requirement of oil gas drilling onsite application.In order to address this problem, except employing alloying, also need the production tube be rolled into carry out off-line heat treatment, as quenching and tempering process, huge Equipment for Heating Processing will be increased like this, need to consume a large amount of resources and the energy simultaneously.Such as, hot rolling for routine is seamless J55,37Mn5 round steel billet (0.35 ~ 0.40%C, the 1.2 ~ 1.5%Mn) perforated of general employing higher carbon content, hot rolling and stretch reducing and directly obtain, because phosphorus content is high, although kept intensity but sacrifice toughness; For hot rolling HFWJ55, the raw material of more low carbon content must be adopted because 37Mn5 carbon content is too high, solderability is poor, although its HFW welds female pipe and has kept toughness but sacrifice intensity after hot rolling tube reducing, only reach H40 level reluctantly, if promote obdurability subsequently through off-line Tempering and Quenching, can cause significantly increasing cost, product competitiveness declines.
In order to solve this contradiction, economize on resources and energy consumption, reduce costs, can consider that the waste heat after making full use of Steel Tube Rolling carries out burning optimization on line (On-line Control cools even press quenching), deformation strengthening and phase transformation strengthening are combined and carries out, realize the structural transformation after tubing hot rolling and performance Effective Regulation, reduce energy consumption and producing cost.Although Controlled Rolling And Controlled Cooling has been successfully applied to Strip and wire and rod field, up to now, after having not yet to see the hot rolling of HFW welded tube in the relevant report of the cold reliable apparatus of even quenching of line traffic control and maturation process.First the difficult problem existed is that cooling uniformity controls, and the particularity due to steel tube section shape causes being difficult in cooling procedure guaranteeing the cooling uniformity along steel shaft to, circumference and wall thickness direction; Secondly, process for cooling controls, because the process window of controlled cooling model is narrow, and the walking speed wide ranges (0.9m/s ~ 3.6m/s) of pipe after the HFW welded tube hot rolling tube reducing of different size, will fast, evenly on-line cooling be to the temperature range of specifying by the hot rolling tube reducing pipe of all specifications in this velocity interval, this at line traffic control cold charge for cooling capacity and accurately control overflow is very strict.Therefore, steel pipe is generally considered an engineering circles difficult problem at line traffic control refrigeration technique.
Summary of the invention
The technical problem that the present invention solves: a kind of online controlled cooling method and the device that improve obdurability after the hot rolling of HFW welded tube are provided, under the prerequisite reducing carbon and alloying element content, HFW are welded female pipe after hot rolling tube reducing, still at tubing phase transition temperature A
c3above pipe is through online controlled cooling device, carry out controlled cooling model, not only achieve the cooling uniformity along steel pipe circumference, axis and wall thickness direction, and controlled by rational process for cooling, effectively control tubing structural transformation, realize grain refinement and suppress banded segregation, obtain required tissue, as bainite, even martensite etc., improve intensity and the toughness of full body, obtain good combination property, simultaneously cost-saving, reduce resource and energy resource consumption.
Technical solution of the present invention: a kind of online controlled cooling method improving obdurability after the hot rolling of HFW welded tube, first adopts Frequency Induction Heating mode, by HFW welded tube fast, be uniformly heated to austenitizing phase transition temperature A
c3above 80 ~ 200 DEG C, then carry out the pipe that hot rolling tube reducing obtains required specification, make subsequently still at phase transition temperature A
c3above pipe blank rotary, by online controlled cooling device, is chilled to temperature required soon with the average cooldown rate of>=15 DEG C/s, makes the microstructure of HFW welded tube obtain refinement, improve the obdurability of full body, obtain good combination property.
Described HFW welded tube is rotated through online controlled cooling device with the speed of 0.30 ~ 3.30m/s, and control HFW welded tube is chilled to temperature required with the cooldown rate of 15 ~ 45 DEG C/s soon, enters chain-type cooling bed subsequently and implements air cooling to room temperature.
Cooldown rate >=50 of described online controlled cooling device DEG C/s, realizes the process of HFW welded tube press quenching.
Improve an online controlled cooling device for obdurability after the hot rolling of HFW welded tube, comprise variable frequency pump, water jet, nozzle and transmission device; Described water jet structure ringwise, the water inlet pipe of water jet is connected with the delivery port of variable frequency pump, and water jet inwall is uniform nozzle circumferentially; Described transmission device is arranged between water jet, drives HFW welded tube to rotate with certain speed and advances.
Described nozzle is linear pattern hollow cone nozzles, the jeting area of nozzle is annular, by adjustable ball-shaped joint along uniform two rows of water jet inwall circumference, and the vertical angle of nozzle spray direction is 10 ~ 20 °, make the injection direction of nozzle and steel pipe direction of advance in a certain angle.
Described water jet is evenly arranged with the spacing being not less than 1.2 meters, steel pipe is made to be as cold as temperature required soon with the staged type of cooling of multistage " cooling-fast temperature rising-cool again-fast temperature rising again ", reduce the cooling rate gradient of steel pipe inside and outside wall, guarantee the cooling uniformity in thickness of steel pipe direction.
Described transmission device controls speed and the rotating speed of steel pipe rotary advance by the V-type cross roll controlling driving motor and adjustable inclination angle.
The advantage that the present invention has and effect:
1, the present invention is under the prerequisite reducing carbon content and alloying element content, by the economical HFW welded tube more than phase point temperature, implements in line traffic control cold treatment, improves the comprehensive mechanical property of HFW welded tube.Guaranteeing to reduce cost under the prerequisite obtaining excellent combination property, saved resource.
2, the present invention is by controlling the various ways such as steel pipe pass-through mode, adjustment shower water pressure and flow, choose reasonable water jet unlatching strategy, adjustment nozzle spray angle, realize full body Homogeneous cooling and meet different steel grade, specification and process for cooling requirement, realizing continuous batch production.
3, the water jet of loop configuration of the present invention is evenly arranged with a determining deviation, steel pipe is made to be as cold as temperature required with the staged type of cooling of multistage " cooling-fast temperature rising-cool again-fast temperature rising again ", reduce the cooling rate gradient of steel pipe inside and outside wall, guarantee the cooling uniformity in thickness of steel pipe direction.
4, the jeting area of nozzle of the present invention is annular, steel pipe in cooling procedure is enable directly to be subject to cool water shower region fast temperature rising, realize whole outer wall of steel pipe different parts cooling rate gradient little, simultaneously injection direction is in a certain angle with steel pipe direction of advance, avoids pipe end water inlet to cause still at A
c3the steel pipe head of above temperature relative in body, afterbody cooling rate is too fast, the problem causing steel pipe head to cross cold and middle afterbody austenite solid-state phase changes degree varies to cause, guarantee steel shaft to cooling uniformity.
5, the present invention controls speed and the rotating speed of steel pipe rotary advance by the V-type cross roll controlling driving motor and adjustable inclination angle, guarantees the cooling uniformity of steel pipe circumference.
Accompanying drawing explanation
Fig. 1 is online controlled cooling device structural representation of the present invention;
Fig. 2 is water jet structural representation of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is nozzle arrangements schematic diagram of the present invention;
Fig. 5 be after the hot rolling of medium carbon steel material HFW welded tube Direct Air-Cooled to the metallographic structure of room temperature;
Fig. 6 is the metallographic structure after the hot rolling of medium carbon steel HFW welded tube after line traffic control is cold;
Fig. 7 be after the hot rolling of mild steel (Q345 material) HFW welded tube Direct Air-Cooled to the metallographic structure of room temperature;
Fig. 8 is the metallographic structure after the hot rolling of mild steel (Q345 material) HFW welded tube after line traffic control is cold.
Detailed description of the invention
By reference to the accompanying drawings 1,2,3,4, online controlled cooling device of the present invention comprises variable frequency pump 1, water jet 2, nozzle 3 and transmission device 4; Described water jet 2 structure ringwise, the water inlet pipe of water jet 2 is connected with the delivery port of variable frequency pump 1, and water jet 2 inwall is uniform nozzle 3 circumferentially; Described nozzle 3 is linear pattern hollow cone nozzles, the jeting area of guarantee nozzle 3 is annular, nozzle 3 is arranged along water jet 2 inwall circumference uniform two by adjustable ball-shaped joint 5, the injection direction of nozzle 3 and the vertical angle of water jet 2 radial direction are 10 ~ 20 °, so make the injection direction of nozzle 3 and steel pipe direction of advance in a certain angle.Described transmission device 4 is arranged between water jet 2, drives HFW welded tube to rotate with certain speed and advances.Described water jet 2 is evenly arranged with the spacing being not less than 1.2 meters, steel pipe is made to be as cold as temperature required with the staged type of cooling of multistage " cooling-fast temperature rising-cool again-fast temperature rising again ", reduce the cooling rate gradient of steel pipe inside and outside wall, guarantee the cooling uniformity in thickness of steel pipe direction.Described transmission device 4 controls speed and the rotating speed of steel pipe rotary advance by the V-type cross roll controlling driving motor and adjustable inclination angle.
Described online controlled cooling device is arranged between hot rolling tube reducing unit and chain-type cooling bed, by controlling steel pipe pass-through mode, adjustment shower water pressure and flow, strategy opened by choose reasonable water jet, adjust the various ways such as nozzle spray angle, realize full body Homogeneous cooling and meet different steel grade, specification and process for cooling requirement, realizing continuous batch production.
Described online controlled cooling device technical parameter: hydraulic pressure≤0.8MPa, flow≤1100m
3/ h, inflow temperature≤30 DEG C.
Cold in line traffic control after embodiment 1: Ф 193.7 × 7.34mmHFW welded tube (medium carbon steel material) hot rolling.
HFW welded tube chemical composition (wt.%): C0.30, Si0.25, Mn1.28, P0.011, S0.005, all the other are Fe and uncontrollable field trash.A
c3it is 830 DEG C.
First, HFW welded tube hot rolling tube reducing.The HFW welded tube of Ф 193.7 × 7.34mm is heated rapidly to 1000 DEG C through intermediate-frequency heating furnace, enters the pipe of hot tensile strength tube reducing unit hot rolling tube reducing to Ф 139.7 × 7.72mm, then enter and rotate the steel pipe that hot saw is sawn into about fixed length 10m.
Secondly, hot-rolled tube billet is cold in line traffic control.Temperature of steel pipe after hot saw is 880 DEG C, makes temperature be down to 820 DEG C with the speed of 0.93m/s through one section of air cooling roller-way, enters V-type cross roll road immediately and makes steel pipe be rotated through cold section of whole control with the speed of 0.93m/s, shower water pressure 0.31MPa, flow 330m
3/ h, water jet opens 8 groups, and cold rear temperature is 650 DEG C, and cooldown rate is 20 DEG C/s, and then steel pipe enters chain-type cooling bed air cooling to room temperature.
Finally, nondestructive inspection and the processing of pipe end screw thread.
Performance characteristics: the HFW welded tube of medium carbon steel material, after Ф 193.7 × 7.34mm hot rolling tube reducing to Ф 139.7 × 7.72mm, if Direct Air-Cooled is to room temperature, then obtain polygonal ferrite and add pearlitic normalized structure, the percent by volume of ferrite and pearlite is about 1:1, and ferrite crystal grain thick (average grain size about 19 μm), the obvious (see figure 5) of banded segregation, its mechanical index is lower, and namely yield strength, tensile strength and impact absorbing energy (0 DEG C, full size bar) are respectively 410MPa, 640MPa and 29J, if implement above-mentioned cooling control technology after the HFW welded tube hot rolling of this specification material, then obtain a small amount of pro-eutectoid ferrite and add the tissue that a large amount of sub-layers lamellar pearlite group is master, the percent by volume of ferrite and pearlite is about 1:5 ~ 6, the obvious refinement of ferrite crystal grain (average grain size about 8 μm) and banded segregation eliminate (see figure 6), at fining ferrite grains, under suppressing the effect of pro-eutectoid ferrite precipitation and increase content of pearlite in alloy, its yield strength, tensile strength and impact absorbing energy (0 DEG C, full size bar) be respectively 540MPa, 735MPa and 71J, the obdurability of visible body is significantly improved.
Cold in line traffic control after embodiment 2: Ф 193.7 × 5.51mmHFW welded tube (mild steel Q345 material) hot rolling.
HFW welded tube chemical composition (wt.%): C0.16, Si0.26, Mn1.31, P0.013, S0.004, all the other are Fe and uncontrollable field trash.A
c3it is 840 DEG C.
First, HFW welded tube hot rolling tube reducing.The HFW welded tube of Ф 193.7 × 5.51mm is heated rapidly to 980 DEG C through intermediate-frequency heating furnace, enters the pipe of hot tensile strength tube reducing unit hot rolling tube reducing to Ф 139.7 × 6.20mm, then enter and rotate the steel pipe that hot saw is sawn into about fixed length 10m.
Secondly, hot-rolled tube billet is cold in line traffic control.Temperature of steel pipe after hot saw is 860 DEG C, makes temperature be down to 795 DEG C with the speed of 1.08m/s through one section of air cooling roller-way, enters V-type cross roll road immediately and makes steel pipe rotary by cold section of whole control with the speed of 1.08m/s, shower water pressure 0.33MPa, flow 412m
3/ h, water jet opens 10 groups, and cold rear temperature is 410 DEG C, and cooldown rate is 30 DEG C/s, and then steel pipe enters chain-type cooling bed air cooling to room temperature.
Finally, nondestructive inspection and the processing of pipe end screw thread.
Performance characteristics: the HFW welded tube of low-carbon steel material, after Ф 193.7 × 5.51mm hot rolling tube reducing to Ф 139.7 × 6.20mm, if Direct Air-Cooled is to room temperature, then obtain the shaft-like ferrite such as a large amount of and be main tissue and ferrite crystal grain comparatively thick (average grain size about 22 μm), the obvious (see figure 7) of banded segregation, its mechanical index is lower, and namely yield strength, tensile strength and impact absorbing energy (0 DEG C, full size bar) are respectively 365MPa, 518MPa and 59J; If implement above-mentioned cooling control technology after the HFW welded tube hot rolling of this specification material, then obtaining thinner acicular ferrite and low-carbon bainite is main organize (see figure 8), under the effect of refined crystalline strengthening and phase transformation strengthening, its yield strength, tensile strength and impact absorbing energy (0 DEG C, full size bar) are respectively 475MPa, 680MPa and 103J, and the intensity of body and toughness improve Be very effective.
Quick Cooling Quenching technique after the hot rolling of embodiment 3:HFW welded tube.Small dimension after subtracting, thin wall thickness steel tube are opened to heat, if increased water flow amount and pressure, as cooling rate >=50 DEG C/s (maximum cold scooter is to 90 DEG C/s), the ability of press quenching after the hot rolling of HFW welded tube can be realized, for the HFW welded tube of Future Development more low cost, more Hi-grade steel provides a kind of new process routes.
Above-described embodiment, just present pre-ferred embodiments, be not used for limiting the scope of the present invention, therefore all equivalent variations done with content described in the claims in the present invention, all should be included within the claims in the present invention scope.
Claims (2)
1. improve an online controlled cooling method for obdurability after the hot rolling of HFW welded tube, it is characterized in that: first adopt Frequency Induction Heating mode, by HFW welded tube fast, be uniformly heated to austenitizing phase transition temperature A
c3above 80 ~ 200 DEG C, then carry out the pipe that hot rolling tube reducing obtains required specification, make subsequently still at phase transition temperature A
c3above pipe is rotated through online controlled cooling device with the speed of 0.30 ~ 3.30m/s, and control HFW welded tube is chilled to temperature required with the cooldown rate of 15 ~ 45 DEG C/s soon, enter chain-type cooling bed subsequently and implement air cooling to room temperature, the microstructure of HFW welded tube is made to obtain refinement, improve the obdurability of full body, obtain good combination property;
Described online controlled cooling device comprises variable frequency pump (1), water jet (2), nozzle (3) and transmission device (4); Described water jet (2) structure ringwise, the water inlet pipe of water jet (2) is connected with the delivery port of variable frequency pump (1), and water jet (2) inwall is uniform nozzle (3) circumferentially; Described transmission device (4) is arranged between water jet (2), drives HFW welded tube to rotate with certain speed and advances;
Described nozzle (3) is linear pattern hollow cone nozzles, the jeting area of nozzle (3) is annular, by adjustable ball-shaped joint (5) along uniform two rows of water jet (2) inwall circumference, and the vertical angle of the injection direction of nozzle (3) is 10 ~ 20 °, make the injection direction of nozzle (3) and steel pipe direction of advance in a certain angle;
Described water jet (2) is evenly arranged with the spacing being not less than 1.2 meters, steel pipe is made to be as cold as temperature required soon with the staged type of cooling of multistage " cooling-fast temperature rising-cool again-fast temperature rising again ", reduce the cooling rate gradient of steel pipe inside and outside wall, guarantee the cooling uniformity in thickness of steel pipe direction.
2. a kind of online controlled cooling method improving obdurability after the hot rolling of HFW welded tube according to claim 1, is characterized in that: described transmission device (4) controls speed that steel pipe rotary advances and rotating speed by the V-type cross roll controlling driving motor and adjustable inclination angle.
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| CN104561462B (en) * | 2014-12-22 | 2018-01-12 | 昆明理工大学 | A kind of bainite and martensite Multiphase Steel/iron progressive austempering heat treatment method and device |
| CN106040758A (en) * | 2016-05-26 | 2016-10-26 | 马鞍山市安工大工业技术研究院有限公司 | Online accelerated cooling method for production of hot rolled seamless steel tube |
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| CN107739794B (en) * | 2017-11-24 | 2023-05-26 | 北京京诚瑞信长材工程技术有限公司 | Production line and production process for quenching and tempering heat treatment of online quenching device and steel pipe |
| CN111589879B (en) * | 2020-04-29 | 2021-06-11 | 东北大学 | Control method for improving texture uniformity of thick-wall seamless steel tube online cooling process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4747290A (en) * | 1983-12-20 | 1988-05-31 | Tubemakers Of Australia Pty., Ltd. | Roller cooling table |
| DE19963185A1 (en) * | 1999-12-27 | 2001-07-12 | Siemens Ag | Method and device for cooling a hot-rolled metal strip emerging from a roll stand |
| CN1951589A (en) * | 2006-11-21 | 2007-04-25 | 东北大学 | A seamless steel pipe on-line cooling method |
| CN101157096A (en) * | 2007-11-16 | 2008-04-09 | 天津钢管集团股份有限公司 | Technique of controlling and cooling hot-rolled seamless tube online |
| CN101357371A (en) * | 2007-07-31 | 2009-02-04 | 宝山钢铁股份有限公司 | Control method of steel-tube online normalization |
| CN201455003U (en) * | 2009-08-26 | 2010-05-12 | 鞍钢股份有限公司 | Device for realizing controlled rolling and controlled cooling of seamless pipe |
| CN203209438U (en) * | 2013-03-22 | 2013-09-25 | 宝鸡石油钢管有限责任公司 | Online controlled cooling device for improving obdurability of hot-rolled high frequency welding (HFW) pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202162220U (en) * | 2011-07-27 | 2012-03-14 | 中冶赛迪工程技术股份有限公司 | Steel pipe cooling device |
| CN102424906A (en) * | 2011-12-14 | 2012-04-25 | 宝鸡石油钢管有限责任公司 | Method for optimizing weld seam structure and properties of HFW(High Frequency Welded) pipes |
-
2013
- 2013-03-22 CN CN201310093389.4A patent/CN103128108B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4747290A (en) * | 1983-12-20 | 1988-05-31 | Tubemakers Of Australia Pty., Ltd. | Roller cooling table |
| DE19963185A1 (en) * | 1999-12-27 | 2001-07-12 | Siemens Ag | Method and device for cooling a hot-rolled metal strip emerging from a roll stand |
| CN1951589A (en) * | 2006-11-21 | 2007-04-25 | 东北大学 | A seamless steel pipe on-line cooling method |
| CN101357371A (en) * | 2007-07-31 | 2009-02-04 | 宝山钢铁股份有限公司 | Control method of steel-tube online normalization |
| CN101157096A (en) * | 2007-11-16 | 2008-04-09 | 天津钢管集团股份有限公司 | Technique of controlling and cooling hot-rolled seamless tube online |
| CN201455003U (en) * | 2009-08-26 | 2010-05-12 | 鞍钢股份有限公司 | Device for realizing controlled rolling and controlled cooling of seamless pipe |
| CN203209438U (en) * | 2013-03-22 | 2013-09-25 | 宝鸡石油钢管有限责任公司 | Online controlled cooling device for improving obdurability of hot-rolled high frequency welding (HFW) pipe |
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Effective date of registration: 20170524 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Co-patentee after: Baoji Petroleum Steel Pipe Co., Ltd. Patentee after: China National Petroleum Corporation Address before: 721008, 10 Tan Tan Road, Shaanxi, Baoji Patentee before: Baoji Petroleum Steel Pipe Co., Ltd. |
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