CN106040758A - Online accelerated cooling method for production of hot rolled seamless steel tube - Google Patents
Online accelerated cooling method for production of hot rolled seamless steel tube Download PDFInfo
- Publication number
- CN106040758A CN106040758A CN201610374474.1A CN201610374474A CN106040758A CN 106040758 A CN106040758 A CN 106040758A CN 201610374474 A CN201610374474 A CN 201610374474A CN 106040758 A CN106040758 A CN 106040758A
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- Prior art keywords
- cooling
- steel pipe
- steel tube
- cooling spray
- motion
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B2045/0227—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses an online accelerated cooling method for production of a hot rolled seamless steel tube and belongs to the technical field of steel rolling. The method includes the steps that the inner surface of the steel tube is cooled with a movable cooling sprayer, specifically, the motion speed of the cooling sprayer is identical to the linear motion speed of the steel tube, the movable cooling sprayer is composed of a cooling sprayer body and a motion mechanism, and the external diameter of the cooling sprayer body has to be smaller than the internal diameter of the cooled steel tube so that the cooling sprayer body cannot make contact with the inner surface of the steel tube; after the cooling sprayer body is inserted into the head of the steel tube by a certain length, the cooling sprayer body starts spraying, meanwhile, the motion mechanism drives the cooling sprayer body to move in the linear motion direction of the steel tube, and the motion speed of the cooling sprayer body is identical to the linear motion speed of the steel tube; and the cooling sprayer cools the inner surface of the steel tube while moving. The method can be applied in cooperation with a presently common steel tube outer surface cooling device, and accordingly the online accelerated cooling technique for seamless steel tubes is more perfect.
Description
Technical field:
The invention belongs to technical field of steel rolling, be specifically related to a kind of for hot rolled seamless steel tube produce accelerate online cooling
Method, the method is specifically designed to the acceleration cooling of steel pipe internal-surface.
Background technology:
Over nearly 30 years, " controlled rolling and controlled cooling " technique and technology iron and steel the most at home manufactures field and extensively applies.Wherein, " control
Cold " refer in particular to hot-strip is rolled after be controlled cooling, mainly include rate of cooling control and cooling two aspects of extent control.
Ferrous materials with ferrite as Main Tissues, as implemented to accelerate cooling after rolling, can make fetrite grain refinement, its result
It is not only to improve steel strength, also improve steel toughness.High intensity, the performance group of high tenacity and, the heaviest for structural steel
Want, by the use of high strength steel, the consumption of material can be greatly reduced in engineering, have economic benefit and social benefit concurrently.
Hot-strip produce roll after accelerate cooling device, extensively apply in fields such as hot-strip, Wide and Thick Slab and long profiles, become
Equip for production line indispensability.But, limited by steel tube section shape, for after the sizing of hot rolled seamless steel tube production line
Line cooling Processes and apparatus, is not yet furtherd investigate.Seamless steel pipe accelerates the maximum difficult point of cooling online, in being steel pipe
The acceleration cooling on surface.
Summary of the invention:
The present invention is directed to above-mentioned technical problem present in existing steel pipe's production on-line cooling, it is provided that a kind of for hot rolling without
The online acceleration cooling method of seam steel pipe's production, the method is specifically designed to the acceleration cooling of seamless steel pipe interior surface.Internal surface of steel pipe
The solution of face cooling problem, makes the online accelerated cooling process of seamless steel pipe more perfect.
A kind of online acceleration cooling method produced for hot rolled seamless steel tube provided by the present invention includes herein below:
(1) on the rollgang after sizing unit, before making the hot rolled seamless steel tube of online production in a screwing motion manner
Enter, enter after rollgang particularly as follows: hot rolled seamless steel tube entirety departs from sizing unit, all defeated between sizing unit to cold bed
Send roller-way in the same direction, synchronize, with angle horizontal tilt certain angle, make steel pipe advance in a screwing motion manner, spiral rotating center
For steel pipe central axis, the screw of steel pipe is by around the circular motion of steel pipe central axis be perpendicular to the straight line of periphery
Motion is constituted.
(2) use movable cooling spray, steel pipe internal-surface is implemented cooling, the movement velocity of cooling spray and steel pipe
The movement velocity of rectilinear direction identical；Movable cooling spray, is made up of cooling spray and motion two parts, cooling
Shower nozzle external diameter must be less than the internal diameter of cooled steel pipe, to guarantee that cooling spray does not contacts with steel pipe internal-surface；When cooling spray is inserted
After entering steel pipe head certain distance, cooling spray starts water spray, and meanwhile, motion drives cooling spray, transports along steel pipe straight line
The motion of dynamic direction, and identical with the speed holding of steel pipe linear movement direction；Cooling spray is real to steel pipe internal-surface at the volley
Execute cooling.
(3) after cooling technique terminates, cooling spray is closed, and seamless steel pipe continues holding and is threadingly advanced, and cooling spray is in fortune
Motivation structure drives lower accelerated motion, makes cooling spray depart from steel pipe head.
The inventive method can solve steel pipe internal-surface and accelerate cooling problem, with the most common outer surface of steel tube chiller
With the use of, it is possible to make the online accelerated cooling process of seamless steel pipe more perfect.By online accelerated cooling process, can be notable
In suppression steel, secondary cementite separates out, and fining ferrite grains improves steel strength and impact flexibility.For part kind and rule
Lattice, can save traditional subsequent heat treatment operation, directly accelerate the cooling preferable microstructure and mechanical property of acquisition by online.Right
In part kind and specification, the available online type of cooling of accelerating realizes immediate quenching, " directly quenches with " immediate quenching " replacement
Fire ", it is to avoid post bake, significantly save the energy, reduce production cost.
Accompanying drawing illustrates:
Fig. 1: step (1) schematic diagram in the inventive method；
Fig. 2: one of step (2) schematic diagram in the inventive method；
Fig. 3: in the inventive method the two of step (2) schematic diagram；
Fig. 4: step (3) schematic diagram in the inventive method；
Fig. 5: the inventive method schematic diagram when continuous prodution.
In figure: 1: sizing mill；2: cold bed；3: rollgang；4: steel pipe；5: cooling spray；6: motion；7: start cold
But station is specified；8: follow-up steel pipe.
Detailed description of the invention:
A kind of online acceleration cooling method produced for hot rolled seamless steel tube provided by the present invention specifically comprises the following steps that
Step (1): all rollgangs 3 between sizing mill 1 to cold bed 2 in the same direction, synchronize, with angle ground level vert necessarily
Angle, such as: 15 °, steel pipe 4 starts screw, i.e. while horizontal rectilinear motion, does circumference fortune around steel pipe central axis
Dynamic, such as Fig. 1.
Step (2): movable cooling spray, is made up of cooling spray 5 and motion 6, is beginning to cool down appointment work
Position 7 waits that cooling sprays insert after steel pipe 4 head certain distances, such as: 150mm, starts water-spraying control, cooling spray 5 not with steel
Pipe 4 inner surface contacts, such as Fig. 2；Meanwhile, motion 6 drives cooling spray 5, starts to transport along steel pipe linear movement direction
Dynamic and identical with the speed v holding of steel pipe linear movement direction；Steel pipe 4 inner surface is implemented cold by cooling spray 5 at the volley
But, such as Fig. 3；
Step (3): after cooling technique terminates, cooling spray 5 stops water spray, and steel pipe 4 continues holding and is threadingly advanced, cooling spray
5 accelerated motions under motion 6 drives, movement velocity is u, and u > v, makes cooling spray 5 depart from steel pipe 4 head, such as figure
4。
During continuous prodution, after steel pipe 4 enters cold bed, between sizing mill to cold bed, the synchronization of all runout tables 3 reverts to former
Carrying out the angle vertical with production line, cooling spray 5, under the drive of motion 6, returns and begins to cool down appointment station 7, prepare
Start the cooling of follow-up steel pipe 8, it is achieved continuous prodution, such as Fig. 5.
Claims (1)
1. the online acceleration cooling method produced for hot rolled seamless steel tube, it is characterised in that the method includes following interior
Hold:
(1) on the rollgang after sizing unit, the hot rolled seamless steel tube of online production is made to advance in a screwing motion manner, tool
Body is: after hot rolled seamless steel tube entirety departs from sizing unit entrance rollgang, all conveying rollers between sizing unit to cold bed
Road in the same direction, synchronize, with angle horizontal tilt certain angle, make steel pipe advance in a screwing motion manner, spiral rotating center is steel
Tube hub axis, the screw of steel pipe is by around the circular motion of steel pipe central axis be perpendicular to the linear motion of periphery
Constitute；
(2) using movable cooling spray, steel pipe internal-surface is implemented cooling, the movement velocity of cooling spray is straight with steel pipe
The movement velocity in line direction is identical；Movable cooling spray, is made up of cooling spray and motion two parts, cooling spray
External diameter must be less than the internal diameter of cooled steel pipe, to guarantee that cooling spray does not contacts with steel pipe internal-surface；When cooling spray inserts steel
After tube head certain distance, cooling spray starts water spray, and meanwhile, motion drives cooling spray, along steel pipe linear motion side
To motion and identical with the speed holding of steel pipe linear movement direction；Steel pipe internal-surface is implemented cold by cooling spray at the volley
But；
(3) after cooling technique terminates, cooling spray is closed, and seamless steel pipe continues holding and is threadingly advanced, and cooling spray is at fitness machine
Structure drives lower accelerated motion, makes cooling spray depart from steel pipe head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374474.1A CN106040758A (en) | 2016-05-26 | 2016-05-26 | Online accelerated cooling method for production of hot rolled seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610374474.1A CN106040758A (en) | 2016-05-26 | 2016-05-26 | Online accelerated cooling method for production of hot rolled seamless steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106040758A true CN106040758A (en) | 2016-10-26 |
Family
ID=57172311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610374474.1A Pending CN106040758A (en) | 2016-05-26 | 2016-05-26 | Online accelerated cooling method for production of hot rolled seamless steel tube |
Country Status (1)
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134633A (en) * | 1986-11-26 | 1988-06-07 | Sumitomo Metal Ind Ltd | Cooling method for steel pipe |
| JPH11269548A (en) * | 1998-03-24 | 1999-10-05 | Sumitomo Metal Ind Ltd | Method and device for cooling inner and outer surface of steel tube |
| JP2006152393A (en) * | 2004-11-30 | 2006-06-15 | Sumitomo Metal Ind Ltd | Steel tube cooling method |
| CN101396695A (en) * | 2008-08-26 | 2009-04-01 | 刘彦春 | Hot-rolled seamless tube on-line accelerated cooling device and method |
| CN101570813A (en) * | 2009-06-09 | 2009-11-04 | 刘彦春 | Device and method for directly quenching seamless steel pipes |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN103128108A (en) * | 2013-03-22 | 2013-06-05 | 宝鸡石油钢管有限责任公司 | On-line cooling control method and device for improving strength and tenacity of high-frequency-welding (HFW) welded pipe after being hot rolled |
-
2016
- 2016-05-26 CN CN201610374474.1A patent/CN106040758A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134633A (en) * | 1986-11-26 | 1988-06-07 | Sumitomo Metal Ind Ltd | Cooling method for steel pipe |
| JPH11269548A (en) * | 1998-03-24 | 1999-10-05 | Sumitomo Metal Ind Ltd | Method and device for cooling inner and outer surface of steel tube |
| JP2006152393A (en) * | 2004-11-30 | 2006-06-15 | Sumitomo Metal Ind Ltd | Steel tube cooling method |
| CN101396695A (en) * | 2008-08-26 | 2009-04-01 | 刘彦春 | Hot-rolled seamless tube on-line accelerated cooling device and method |
| CN101570813A (en) * | 2009-06-09 | 2009-11-04 | 刘彦春 | Device and method for directly quenching seamless steel pipes |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN103128108A (en) * | 2013-03-22 | 2013-06-05 | 宝鸡石油钢管有限责任公司 | On-line cooling control method and device for improving strength and tenacity of high-frequency-welding (HFW) welded pipe after being hot rolled |
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Application publication date: 20161026 |