CN208250364U - High-quality big rod " quenching+lonneal " production system - Google Patents
High-quality big rod " quenching+lonneal " production system Download PDFInfo
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- CN208250364U CN208250364U CN201820906323.0U CN201820906323U CN208250364U CN 208250364 U CN208250364 U CN 208250364U CN 201820906323 U CN201820906323 U CN 201820906323U CN 208250364 U CN208250364 U CN 208250364U
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- big rod
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- lonneal
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000010791 quenching Methods 0.000 title claims abstract description 23
- 230000000171 quenching effect Effects 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 63
- 238000000034 method Methods 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000009851 ferrous metallurgy Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The utility model belongs to the cooling production technical field of the high-quality big rod temperature control of Ferrous Metallurgy, particularly disclose a kind of high-quality big rod " quenching+lonneal " production system, first pass through the rapid cooling that circular seam type water tank carries out high hydraulic pressure, high flow capacity to high-quality big rod, low hydraulic pressure, the sequence of low discharge/reciprocal cooling are carried out by spray ring again, to realize high-quality big rod " quenching+lonneal " burning optimization on line technique, reaches control cooling velocity and cooling time, improve rolled piece surface temperature uniformity, reduce the purpose of heat treatment cost and operation cost.
Description
Technical field
The utility model belongs to field of metallurgy, and in particular to a kind of high-quality big rod " quenching+lonneal " production system.
Background technique
In recent years, China's steel excess capacity, long material Market competition, competition model are competing from Yield Competition to technology
It strives and changes with Cost Competition.Cooling control after rolling technology is quickly sent out as the effective ways for improving bar mechanical performance in the recent period
Exhibition.Heat treatment procedure is even omitted since the technology can simplify, production cost is reduced, shortens the wire production period, and improve life
Efficiency is produced, therefore there is preferable economic benefit and social benefit.
Due to inhomogeneities cooling on the cooling section of high-quality big rod and on circumference, high-quality big rod temperature control water cooling is one
Item is very difficult to the technical issues of solving, domestic at present to only have a few high-quality big rod manufacturer to use high-quality big rod
Rear temperature control Water Cooling Technology is rolled, and is concentrated mainly on and the following round steel of Φ 75mm is cooled down.Control refrigeration technique can effectively improve production
Product structure property, especially to the high-quality big rod of excellent steel that need to be heat-treated, such as 42Cr2Mo, which is unimach, has height
Intensity and toughness, harden ability is also preferable, and without apparent temper brittleness, when quenching deforms small, there is higher fatigue after modifier treatment
The limit and anti-repeat impact ability, Low temperature impact toughness is good, and there are high creep strength and creep rupture strength in when high temperature.The steel is usual
It is needed in production using thermal treatment production process, includes online thermal treatment production process and heat-treated offline technique, heat treatment process
Comprising quenching and tempering technique, for small-sized bar since the core table temperature difference is smaller, water tank cooling, core after quenching is can be used in bar
Portion can be cooled to low temperature quickly.But skin temperature returns back to rapidly high temperature after bar leaves water tank, using more water tank
Cooling will bring water-cooling system cost significantly to be promoted, and need to reheat heat preservation using heat-treated offline mode.Production cost is more
Increase.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of high-quality big rod " quenching+lonneal " production systems
System, it is insufficient to solve high-quality big rod controlled cooling device cooling capacity, in cooling procedure intensity of cooling not enough, core table it is uneven, quenching
And tempering process it is complicated the problems such as.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of high-quality big rod " quenching+lonneal " production system, including rolling unit, further include along production mode reform according to
The secondary circular seam type water tank and spray ring that rolling unit rear is set；Circular seam type water tank is mainly by positive circumferential weld nozzle, reversed ring
Nozzle and turbulent pipe composition are stitched, positive circumferential weld nozzle is equipped with water inlet line, and reversed circumferential weld nozzle is equipped with outlet conduit, just
It is corresponded to circumferential weld nozzle and reversed circumferential weld nozzle and is mounted on turbulent pipe both ends and constitutes closed water route with turbulent pipe, several sprays
Ring successively arranged for interval.
Further, roller-way is equipped between each spray ring.
Further, circular seam type water tank both ends are equipped with roller-way.
Further, the jet angle of positive circumferential weld nozzle is 20 °~90 °, and the contra-injection angle of reversed circumferential weld nozzle is 20 °
~90 °.
Further, the difference range of the nominal diameter of forward and reverse circumferential weld nozzle and diameter of rod to be cooled be 15mm~
50mm。
Further, circular seam type water tank quantity is 1 or 2, and the length of each circular seam type water tank is 1.0m~2.0m.
Further, circular seam type water tank and spray ring side are additionally provided with bypass roller-way.
The utility model has the beneficial effects that:
1) production cooling line is compact, and cooling distance is short, saves plant area；
2) system structure is simple, strong operability；
3) small to cooling equipment attrition, it can be achieved that fitting part is replaced, it is convenient for disassembly and assembly, reduce production maintenance cost；
4) it is suitable for all products in production bar Φ 50.0mm and the above specification limit；
5) cooling technique is simple, it can be achieved that high-quality big rod " quenching+lonneal " burning optimization on line technique, effectively improves
Rolled piece surface temperature uniformity easily realizes effective control of cooling velocity and cooling time；
6) the high-quality cold production efficiency of big rod control can be effectively improved, energy consumption in production run is reduced, is effectively reduced and is produced into
This, improves productive profit, brings distinct economic to enterprise, promotes enterprise competitiveness.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the system schematic (sequential spray ring) of the utility model；
Fig. 2 is the system schematic (reciprocating spray ring) of the utility model；
Fig. 3 is the structural schematic diagram of circular seam type water tank；
Fig. 4 is the side structure schematic diagram of circular seam type water tank；
Fig. 5 is spray ring structural schematic diagram；
Fig. 6 is spray ring structure top view；
Fig. 7 is spray ring water spray status diagram；
Fig. 8 is surface layer metallographic structure state diagram after high-quality big rod is cooling；
Fig. 9 is core metallographic structure state diagram after high-quality big rod is cooling.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
High-quality big rod " quenching+lonneal " production system in the utility model, including successively set along production mode reform
Rolling unit 1, circular seam type water tank 2 and the spray ring 3 set；Wherein circular seam type water tank 2 is by positive circumferential weld nozzle 21, reversed circumferential weld
Nozzle 22 and turbulent pipe 23 form, and positive circumferential weld nozzle 21 is equipped with water inlet line 24, and reversed circumferential weld nozzle 22 is equipped with
Waterpipe 25, positive circumferential weld nozzle 21 and reversed circumferential weld nozzle 22, which correspond to, to be mounted on 23 both ends of turbulent pipe and constitutes with turbulent pipe 23
Closed water route, several spray rings 3 successively arranged for interval.
In the system, rolling unit 1 can be short-stress path formula rolling bar unit or memorial archway formula rolling bar unit or stick
Material reducing-sizing mill, circular seam type water tank 2 are composed of multiple equipment, and cooling water enters from water inlet line 24 flows through turbulent pipe 23
Flowed out again from outlet conduit 25 and realize closing cooling, and high-quality big rod disposed within is because in enclosed environment so that its by
The hydraulic pressure arrived is bigger, to realize the fast cooling of high-quality big rod by the high Hydraulic Process.To prevent because of the core table temperature difference
Caused Surface of Rod Bar temperature rise is replied, corresponding, and the spray ring 3 positioned at 2 rear of circular seam type water tank is then sprayed by low hydraulic pressure, low discharge
Penetrate and realize that bar is cooling, the process be water-spraying control is carried out to high-quality big rod in open environment, at this point, high-quality big rod by
Hydraulic pressure it is smaller, cooling procedure is more gentle, and the part is cooling while guaranteeing that skin temperature does not return red, passes through core exterior heat amount
Transmitting, realizes high-quality big rod core temperature drop.
To guarantee bar cooling time, the spray ring 3 in the system can have multiple groups, and particular number is set according to bar size
It is fixed, to realize that spray ring sequence is cooling.Settable roller-way between each spray ring 3 is steady to guarantee to run in high-quality big rod cooling procedure
It is fixed.Certainly, spray ring quantity can also only be arranged 1 group~2 groups, and bar is back and forth cooled down in spray ring at this time, both ensure that cold
But effect, and save place；The high-quality big rod after water cooling is finally transported to cold bed and later collection device is collected.
In the production system, the jet angle of positive circumferential weld nozzle 21 is 20 °~90 °, the reversed spray of reversed circumferential weld nozzle 22
Firing angle degree is 20 °~90 °.The difference range of the nominal diameter of forward and reverse circumferential weld nozzle and big rod diameter to be cooled is 15mm
~50mm.
Direction/injection direction of positive circumferential weld nozzle is consistent with the traffic direction of rolled piece herein, and reversed circumferential weld nozzle
Direction/injection direction is opposite with the traffic direction of rolled piece.By controlling positive circumferential weld nozzle angle and circumferential weld change width, can mention
High big rod unit area jet density, to optimize the cooling effect of different size big rod.And reversed circumferential weld nozzle then presses down
Cooling water processed is flowed out from turbulent pipe 23, flows out cooling water by outlet conduit 25, ensure that cooling water full of entire turbulent flow
Pipe 23, to improve big rod cooling uniformity.
Turbulent pipe 23 herein is used as cooling tube, realizes the diverging of cooling duct and variation of amassing wealth by heavy taxation by turbulent flow pipeline section,
So that cooling water is had a turbulent feature, cooling water except along roll to and axial flowing in addition to, there are also pressure changes, thus on rolled piece surface
Acutely disturbance is formed, promotes water flow sufficiently to exchange with bar, while impacting Surface of Rod Bar steam blanket, it is cooling to improve big rod surface
Effect, the type of cooling improve 30% or more compared with straight tube cooling efficiency.
In the production system, to guarantee that high-quality big rod and circular seam type water tank have better concentricity in cooling procedure, together
Shi Tigao cooling effect, 2 quantity of circular seam type water tank can be set to 1 or 2, the length of each circular seam type water tank 2 be 1.0m~
2.0m.Corresponding, 2 both ends of circular seam type water tank also are provided with roller-way 4, to guarantee the operation stability of high-quality big rod.
In the production system, circular seam type water tank 2 and 3 side of spray ring are additionally provided with bypass roller-way 5.The high-quality big stick-means of intimidation of different size
Material need to be equipped with the bypass roller-way 5 of corresponding specification when cooling, when production can pass through the mobile realization corresponding specification bar of water-cooled valve platform
Cooling, when high-quality big rod carries out air-cooled, then passed through by bypassing roller-way 5.
Using above-mentioned production system to high-quality big rod carry out " quenching+lonneal " production method, mainly include with
Lower step:
(1) it rolls: using short-stress path formula bar mill or memorial archway formula bar mill or bar reducing-sizing mill, through multiple tracks
Secondary rolling high-quality big rod is equipped with guide and guard before and after when rolling each rolling mill, and prolonging per pass is controlled in the operation of rolling
Stretching coefficient is 1.10~1.45, and spread coefficient is 0.1~0.25 per pass, in the operation of rolling steel billet speed of service be 0.1m/s~
12.0m/s, steel billet temperature are 850 DEG C~1000 DEG C.
(2) nozzle is quickly cooled down: being cut off the Head and Tail Shape irregularity of material described in step (1) using flying shear, is adopted
High-quality big rod is rapidly cooled with circular seam type water tank；Wherein, the positive jet angle of positive circumferential weld nozzle is 20 °~90 °,
The contra-injection angle of reversed circumferential weld nozzle is 20 °~90 °, and the cold of corresponding specification is equipped with when the high-quality big rod of different size is cooling
But nozzle, the i.e. difference of forward and reverse nozzle nominal diameter (nominal diameter) and diameter of rod to be cooled of control circular seam type water tank
Range 15mm~50mm, while the hydraulic pressure for controlling forward and reverse circumferential weld nozzle is 0.01MPa~2.0MPa.
To guarantee that high-quality big rod and circular seam type water tank have better concentricity in cooling procedure, while improving cooling effect
Fruit, single water tank length are 1.0m~2.0m, and water tank quantity is 1 or 2, high-quality big rod surface temperature after nozzle is quickly cooled down
Degree is down to 200 DEG C or less.
(3) spray ring sequence is cooling or reciprocal cooling: the progress spray ring of bar described in step (2) is cooling, it prevents because of core table
Surface of Rod Bar temperature rise caused by the temperature difference is replied, i.e., " returns red " phenomenon, is sprayed by spray ring low hydraulic pressure, low discharge, realizes that bar is cold
But, while guaranteeing that skin temperature does not return red by the way that the part is cooling, by core table heat transfer, high-quality big rod core is realized
Temperature drop.
Control spray ring nozzle hydraulic pressure is 0.01MPa~0.1MPa, and spray ring quantity is set according to bar size, to save field
Ground, spray ring quantity can be set to 1 group~2 groups, and bar is back and forth cooled down in spray ring at this time, such as Φ 90mm bar is spraying
Cooling time is no less than 3min in ring；Roller-way is set between each spray ring, is guaranteed stable in high-quality big rod cooling procedure.
(4) it collects: the high-quality big rod after water cooling being finally transported to cold bed and later collection device is collected.
By taking the high-quality steel big rod of Φ 100mm as an example, " quenching+lonneal " of the bar is carried out in laboratory conditions
Experiment:
Big rod is introduced into circular seam type water tank and is rapidly cooled, wherein the positive jet angle of positive circumferential weld nozzle is 50 °,
The contra-injection angle of reversed circumferential weld nozzle is 65 °, and the difference of forward and reverse nozzle nominal diameter and diameter of rod is 30mm, positive and negative
It is 0.1MPa to the hydraulic pressure of circumferential weld nozzle, Surface of Rod Bar temperature is down to 190 DEG C.
Enter spray ring cooling zone afterwards and carry out reciprocating cooling, spray ring hydraulic pressure is 0.05MPa, 5 minutes cooling times of spray ring, cold
But big rod red temperature is lower than 200 DEG C after the completion of.The microscopic structure of big rod surface and center portion is detected after the completion of experiment respectively
And mechanical property.
It can be seen that all martensite of surface texture from the metallographic structure of bar different location；In bar center portion, occur
Accounting for more martensite, ferrite and a small amount of pearlite line and staff control, martensite content reaches 70%.It is different to compare bar
The mechanical property of position is gradually decreased by surface layer to core tensile strength, and elongation percentage is gradually increased, and the variation with microstructure is advised
It restrains identical.
| Specimen coding | Sample position | Tensile strength (MPa) | Elongation percentage (%) |
| 1 | At the 2mm of surface layer | 1326.01 | 16.94 |
| 2 | At the 2mm of surface layer | 1421.22 | 17.94 |
| 3 | At the 50mm of surface layer | 937.67 | 18 |
| 4 | At the 50mm of surface layer | 1086.21 | 20.11 |
Mechanical property contrast table after the high-quality big rod of table 1 is cooling
It can be seen that high-quality big rod " quenching+lonneal " may be implemented online in such production system and production method
Heat treatment process can effectively improve rolled piece surface temperature uniformity, easily realize effective control of cooling velocity and cooling time；And
Its production cooling line is compact, and cooling distance is short, saves plant area；Heat treatment cost can be substantially reduced, reduce investment and
Operation cost；All products in bar Φ 50.0mm and the above specification limit can be produced.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The range of restriction.
Claims (7)
1. high-quality big rod " quenching+lonneal " production system, including rolling unit, it is characterised in that: further include along production
Direction is successively set on the circular seam type water tank and spray ring at rolling unit rear；Circular seam type water tank mainly by positive circumferential weld nozzle,
Reversed circumferential weld nozzle and turbulent pipe composition, positive circumferential weld nozzle are equipped with water inlet line, and reversed circumferential weld nozzle is equipped with water outlet
Pipeline, positive circumferential weld nozzle and reversed circumferential weld nozzle are corresponding to be mounted on turbulent pipe both ends and constitutes closed water route with turbulent pipe,
Several spray rings successively arranged for interval.
2. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: each spray ring
Between be equipped with roller-way.
3. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: circular seam type
Water tank both ends are equipped with roller-way.
4. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: positive ring
The jet angle for stitching nozzle is 20 °~90 °, and the contra-injection angle of reversed circumferential weld nozzle is 20 °~90 °.
5. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: forward and reverse
The difference range of the nominal diameter of circumferential weld nozzle and diameter of rod to be cooled is 15mm~50mm.
6. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: circular seam type
Water tank quantity is 1 or 2, and the length of each circular seam type water tank is 1.0m~2.0m.
7. high-quality big rod " quenching+lonneal " production system according to claim 1, it is characterised in that: circular seam type
Water tank and spray ring side are additionally provided with bypass roller-way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820906323.0U CN208250364U (en) | 2018-06-06 | 2018-06-06 | High-quality big rod " quenching+lonneal " production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820906323.0U CN208250364U (en) | 2018-06-06 | 2018-06-06 | High-quality big rod " quenching+lonneal " production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208250364U true CN208250364U (en) | 2018-12-18 |
Family
ID=64654217
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820906323.0U Withdrawn - After Issue CN208250364U (en) | 2018-06-06 | 2018-06-06 | High-quality big rod " quenching+lonneal " production system |
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| Country | Link |
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| CN (1) | CN208250364U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441611A (en) * | 2018-06-06 | 2018-08-24 | 中冶赛迪工程技术股份有限公司 | High-quality big rod " quenching+lonneal " production system and production method |
| CN112474831A (en) * | 2020-12-04 | 2021-03-12 | 天津钢铁集团有限公司 | Adjusting method for QTB waste heat treatment process of slit rolled deformed steel bar |
-
2018
- 2018-06-06 CN CN201820906323.0U patent/CN208250364U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441611A (en) * | 2018-06-06 | 2018-08-24 | 中冶赛迪工程技术股份有限公司 | High-quality big rod " quenching+lonneal " production system and production method |
| CN108441611B (en) * | 2018-06-06 | 2023-12-05 | 中冶赛迪工程技术股份有限公司 | High-quality large bar quenching and low-temperature tempering production system and production method |
| CN112474831A (en) * | 2020-12-04 | 2021-03-12 | 天津钢铁集团有限公司 | Adjusting method for QTB waste heat treatment process of slit rolled deformed steel bar |
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Granted publication date: 20181218 Effective date of abandoning: 20231205 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181218 Effective date of abandoning: 20231205 |
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| AV01 | Patent right actively abandoned |