CN110180890A - A kind of high line lumber recovery method for improving of bar - Google Patents
A kind of high line lumber recovery method for improving of bar Download PDFInfo
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- CN110180890A CN110180890A CN201910495249.7A CN201910495249A CN110180890A CN 110180890 A CN110180890 A CN 110180890A CN 201910495249 A CN201910495249 A CN 201910495249A CN 110180890 A CN110180890 A CN 110180890A
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- heating
- lumber recovery
- improving
- bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
Abstract
The present invention relates to the high line lumber recovery lift technique fields of bar, and disclose a kind of high line lumber recovery method for improving of bar, the following steps are included: 1) improve lumber recovery by control heating zone, the temperature of heating is controlled at 1000-1400 DEG C, soaking time after temperature is 4-7 hours, temperature >=1100 DEG C just begun to warm up in heating furnace, the in-furnace temperature of heating furnace is controlled at >=850 DEG C after heating, strict implement heating cycle, improve heating efficiency, promote billet heating temperature uniform, do not occur black print, reduce oxidization burning loss, keep the working of a furnace normal, reduce the maintenance difficulties at heating furnace bottom, guarantee production direct motion.The high line lumber recovery method for improving of the bar, good water tank guide groove tuyere, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, the whole lumber recovery from multi-faceted raising high-speed bar mill, enterprise is facilitated efficiently and effectively to be implemented, the rate that the efficiency and high-speed bar mill for improving implementation are become a useful person, is easy to use.
Description
Technical field
The present invention relates to the high line lumber recovery lift technique field of bar, specially a kind of bar high line lumber recovery promotion sides
Method.
Background technique
It is that the simple graphs such as round, rectangular, hexagon and octagonal and length are relatively horizontal that bar, which refers generally to cross-sectional shape,
Bigger and be all usually a kind of material product provided with vertical bar shape for sectional dimension, bar generally can all carry out machinery
Processing, the material that bar can be made is very more, such as rod iron, aluminium bar, copper rod, wooden stick, rubber bar, sticking plaster and glass bar.
The height of the high line lumber recovery of bar directly affects the production cost of enterprise, changed from steel billet to steel
Not only shape is even more to contain the various data targets of enterprise operation cost, measures steel rolling mill's technology among these
Horizontal height, lumber recovery also directly influence the height of production cost, advocate the present of " cost declining increases benefit " energetically in company
It, improving lumber recovery is exactly for each company " cost efficiency ", and the method for existing raising bar lumber recovery has very much, such as in
A kind of extraordinary forging method suitable for super-duplex stainless steel bar, the invention are disclosed in 105689613 B of state patent CN
Successively comprised the following steps using diameter forging machine and the respective advantage and disadvantage of quick forging machine are taken full advantage of using steel ingot as raw material: diameter forging is fast
Joint cogging, Radial Forging Finishing, air-cooled and solution treatment are forged, it should be suitable for the extraordinary forging method of super-duplex stainless steel bar
Advantage be can be forged into material rate to improve 5% or more than original method, but the implementation of the invention is complicated and step more
It is cumbersome, it becomes a useful person than not being very high, it has not been convenient to which enterprise is efficiently and effectively implemented, and is reduced the efficiency of implementation, is reduced
The rate that high-speed bar mill is become a useful person, it has not been convenient to it uses, so a kind of high line lumber recovery method for improving of bar is proposed to solve above-mentioned ask
Topic.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of high line lumber recovery method for improving of bar, have implementation letter
The advantages that list and high lumber recovery, solves implementation complexity and step is relatively complicated, becomes a useful person than not being very high, it has not been convenient to which enterprise is high
It imitates and is effectively implemented, reduce the efficiency of implementation, reduce the rate that high-speed bar mill is become a useful person, it has not been convenient to which what is used asks
Topic.
(2) technical solution
To realize that above-mentioned implementation is simple and the high purpose of lumber recovery, the invention provides the following technical scheme: a kind of high line of bar
Lumber recovery method for improving, comprising the following steps:
1) lumber recovery is improved by control heating zone, when the temperature of heating controls the heat preservation at 1000-1400 DEG C, after temperature
Between be 4-7 hour, temperature >=1100 DEG C just begun to warm up in heating furnace, after heating heating furnace in-furnace temperature control exists
>=850 DEG C, strict implement heating cycle improves heating efficiency, promotes billet heating temperature uniform, does not occur black print, reduces oxygen
Change scaling loss, keep the working of a furnace normal, reduce the maintenance difficulties at heating furnace bottom, guarantees production direct motion；
2) adjust finishing mill roll gap, roll the appearance of useless situation to reduce, it is necessary to assure the accuracy of finishing mill roll gap and
The uniformity of each class, it is ensured that workpiece front end bites steadily in finishing mill, and poker as-rolled condition is good, and plug-in unit, which glues iron phenomenon, to be reduced；
3) strict implement process system, it is ensured that it is correct that the red base size of each sortie is rolled in thick, so that rolling the red base of each sortie in thick
The accuracy control of size executes this system in 94%-98%, workshop conscientiously, is adjusted to grasp state of arts at any time
It is whole；
4) guide and guard are formulated and wears standard, accomplish that timing is replaced, piling of steel accident caused by preventing because of guide and guard excessive wear, by heap
The occurrence rate reduction and≤0.01% of steel accident；
5) procedure creates conditions for next process, the executive condition of the conscientious supervisory system of workshop technician, reinforces
Management and examination, it is thick in roll stringent red base size selective examination dynamics, big squad leader's per tour inspection verifying is examined to underproof
30-50 member/passage, engineering department's sampling observation to underproof double examination carry out post and skills training to each post operation work, fixed
Phase is 3-5 times every/hold experience exchangement meeting the moon, technical operation level is continuously improved, really implements standardized work；
6) it improves automatic control level reduction and cuts damage, improve flying shear automatic control level, shorten crop end length, avoid flying
Cutting head tail length degree it is long and caused by waste greatly, matched in flying shear shear velocity and information feedback speed, so that contracting
When the length end to end that is chopped, the stabilization of flying shear shearing avoids causing piling of steel；
7) routine adjustment and maintenance carried out to the mechanical devices of all loop-rising rolls, adjustment and maintenance range restraint 2-4 times/
Two months, so that it is guaranteed that realizing that symmetrical rise covers, reasonable employment loop, by improving tension force, pruning rate can be gradually end to end for finishing
It reduces；
8) it improves Controlled Rolling And Controlled Cooling and reduces the generation of on-line oxidation iron sheet, to further increase properties of product, reduce oxidation
Iron sheet production, overcomes the difficulty in equipment, the use of interstand cooling water must in place, in addition to wire rod can be improved after making good use of
Outside tissue and performance uniformity, also spinning adjustment, it is advantageous to enclose shape, while also reducing iron scale amount, good water tank guide groove wind
Mouth, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, periodically set to these
Standby structure carries out maintenance and repair, and maintenance and repair range restraint was at 2-4 times/two months.
Preferably, it during the adjustment finishing mill roll gap, also needs to change guide and guard in finishing mill and cooling water progress technology
Into various work carries out perfect.
Preferably, the formulation guide and guard abrasion standard includes periodic maintenance guide base plate, fastens everywhere on guide base plate
With when guaranteeing that rolled piece enters and leaves milling train, guide base plate does not shake screw, keeps rolled piece head and tail more stable.
Preferably, the step 2), step 3), step 4) and step 5) can integrally be referred to as rolling zone raising lumber recovery
Measure.
Preferably, the reasonable employment loop, it is excessively high that usual loop will appear set amount, guide wheel inordinate wear, deflection and tune
The problems such as whole incorrect, it is asymmetric to will cause set in this way, it is therefore desirable to the utilization rate of device is reasonably improved using loop,
The step 6) and step 7) entirety can be referred to as raising automatic control level reduction and cut damage.
Preferably, Controlled Rolling And Controlled Cooling used by the high line has in terms of reducing iron scale generation, not only may be used
To reduce its decarburized depth and refinement crystal grain, the advantages of steel billet superficial oxidation iron sheet generates can also be reduced.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of high line lumber recovery method for improving of bar, have following beneficial to effect
Fruit:
The high line lumber recovery method for improving of the bar, lumber recovery strict implement heating cycle is improved by heating zone processed, is mentioned
High heating efficiency, promotes billet heating temperature uniform, does not occur black print, reduces oxidization burning loss, keeps the working of a furnace normal, reduces heating
The maintenance difficulties of furnace bottom guarantee production direct motion, the measure of lumber recovery are improved by implementing rolling zone, first adjustment finishing mill roller
Seam rolls the appearance of useless situation to reduce, secondly strict implement process system, it is ensured that and it is correct to roll the red base size of each sortie in thick,
Workshop executes this system conscientiously, is adjusted to grasp state of arts at any time, then formulates guide and guard and wears standard, and it is fixed to accomplish
Shi Genghuan, piling of steel accident caused by preventing because of guide and guard excessive wear, finally, a procedure creates conditions for next process, vehicle
Between the conscientious supervisory system of technician executive condition, strengthen management and examine, it is thick in roll stringent red base size selective examination dynamics, constantly
Develop skill operation level, really implements standardized work, improves automatic control level reduction and cuts damage, improves automatic control level
Damage is cut in reduction, is improved flying shear automatic control level, is avoided wasting greatly, while also reasonably to use loop, by improving tension
Control, pruning rate can gradually decrease end to end for finishing, then reduce the generation of on-line oxidation iron sheet, rack by improving Controlled Rolling And Controlled Cooling
Between cooling water use in place, other than tissue and performance uniformity that wire rod can be improved, also to adjustment spin circle shape it is advantageous,
Iron scale amount is also reduced simultaneously, and good water tank guide groove tuyere, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve all
The generation of finished product iron scale can be reduced, it is whole from the multi-faceted lumber recovery for improving high-speed bar mill, it is clear to implement simple and step
It is clear to be illustrated, facilitate enterprise efficiently and effectively to be implemented, the rate that the efficiency and high-speed bar mill for improving implementation are become a useful person is convenient
It uses.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of high line lumber recovery method for improving of bar, comprising the following steps:
1) lumber recovery is improved by control heating zone, it is 4 that the temperature of heating, which controls the soaking time at 1000 DEG C, after temperature,
Hour, 1100 DEG C of temperature just begun to warm up in heating furnace, the in-furnace temperature of heating furnace is controlled at 850 DEG C, sternly after heating
Lattice execute heating cycle, improve heating efficiency, promote billet heating temperature uniform, do not occur black print, reduce oxidization burning loss, keep
The working of a furnace is normal, reduces the maintenance difficulties at heating furnace bottom, guarantees production direct motion；
2) adjust finishing mill roll gap, roll the appearance of useless situation to reduce, it is necessary to assure the accuracy of finishing mill roll gap and
The uniformity of each class, it is ensured that workpiece front end bites steadily in finishing mill, and poker as-rolled condition is good, and plug-in unit, which glues iron phenomenon, to be reduced；
3) strict implement process system, it is ensured that it is correct that the red base size of each sortie is rolled in thick, so that rolling the red base of each sortie in thick
For the accuracy control of size 94%, workshop executes this system conscientiously, is adjusted to grasp state of arts at any time；
4) guide and guard are formulated and wears standard, accomplish that timing is replaced, piling of steel accident caused by preventing because of guide and guard excessive wear, by heap
The occurrence rate reduction and 0.001% of steel accident；
5) procedure creates conditions for next process, the executive condition of the conscientious supervisory system of workshop technician, reinforces
Management and examination, it is thick in roll stringent red base size selective examination dynamics, big squad leader's per tour inspection verifying carries out examination 30 to underproof
Member/passage, engineering department's sampling observation carry out post and skills training to underproof double examination, to each post operation work, and periodically every 3
It holds experience exchangement meeting secondary/moon, technical operation level is continuously improved, really implements standardized work；
6) it improves automatic control level reduction and cuts damage, improve flying shear automatic control level, shorten crop end length, avoid flying
Cutting head tail length degree it is long and caused by waste greatly, matched in flying shear shear velocity and information feedback speed, so that contracting
When the length end to end that is chopped, the stabilization of flying shear shearing avoids causing piling of steel；
7) routine adjustment and maintenance are carried out to the mechanical device of all loop-rising rolls, adjustment and maintenance range restraint are 2 times/two
Month, so that it is guaranteed that realizing that symmetrical rise covers, reasonable employment loop, by improving tension force, pruning rate can gradually subtract end to end for finishing
It is few；
8) it improves Controlled Rolling And Controlled Cooling and reduces the generation of on-line oxidation iron sheet, to further increase properties of product, reduce oxidation
Iron sheet production, overcomes the difficulty in equipment, the use of interstand cooling water must in place, in addition to wire rod can be improved after making good use of
Outside tissue and performance uniformity, also spinning adjustment, it is advantageous to enclose shape, while also reducing iron scale amount, good water tank guide groove wind
Mouth, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, periodically set to these
Standby structure carries out maintenance and repair, and maintenance and repair range restraint was at 2 times/two months.
The high line lumber recovery method for improving of the bar is by improving lumber recovery in the measure of heating zone raising lumber recovery, rolling zone
Measure, improve automatic control level reduction cut damage and improve Controlled Rolling And Controlled Cooling reduce on-line oxidation iron sheet generate four aspect
The high line lumber recovery of bar effectively and is successfully improved, facilitates enterprise efficiently and effectively to be implemented, improve implementation by hand
The rate that efficiency and high-speed bar mill are become a useful person is easy to use.
Embodiment two:
A kind of high line lumber recovery method for improving of bar, comprising the following steps:
1) lumber recovery is improved by control heating zone, the soaking time that the temperature of heating is controlled at 1200 DEG C, after temperature is
5.5 hours, 1200 DEG C of the temperature just begun to warm up in heating furnace, the in-furnace temperature of heating furnace was controlled at 900 DEG C after heating,
Strict implement heating cycle improves heating efficiency, promotes billet heating temperature uniform, does not occur black print, reduces oxidization burning loss, protects
It holds that the working of a furnace is normal, reduces the maintenance difficulties at heating furnace bottom, guarantee production direct motion；
2) adjust finishing mill roll gap, roll the appearance of useless situation to reduce, it is necessary to assure the accuracy of finishing mill roll gap and
The uniformity of each class, it is ensured that workpiece front end bites steadily in finishing mill, and poker as-rolled condition is good, and plug-in unit, which glues iron phenomenon, to be reduced；
3) strict implement process system, it is ensured that it is correct that the red base size of each sortie is rolled in thick, so that rolling the red base of each sortie in thick
For the accuracy control of size 96%, workshop executes this system conscientiously, is adjusted to grasp state of arts at any time；
4) guide and guard are formulated and wears standard, accomplish that timing is replaced, piling of steel accident caused by preventing because of guide and guard excessive wear, by heap
The occurrence rate reduction and 0.007% of steel accident；
5) procedure creates conditions for next process, the executive condition of the conscientious supervisory system of workshop technician, reinforces
Management and examination, it is thick in roll stringent red base size selective examination dynamics, big squad leader's per tour inspection verifying carries out examination 40 to underproof
Member/passage, engineering department's sampling observation carry out post and skills training to underproof double examination, to each post operation work, and periodically every 4
It holds experience exchangement meeting secondary/moon, technical operation level is continuously improved, really implements standardized work；
6) it improves automatic control level reduction and cuts damage, improve flying shear automatic control level, shorten crop end length, avoid flying
Cutting head tail length degree it is long and caused by waste greatly, matched in flying shear shear velocity and information feedback speed, so that contracting
When the length end to end that is chopped, the stabilization of flying shear shearing avoids causing piling of steel；
7) routine adjustment and maintenance are carried out to the mechanical device of all loop-rising rolls, adjustment and maintenance range restraint are 3 times/two
Month, so that it is guaranteed that realizing that symmetrical rise covers, reasonable employment loop, by improving tension force, pruning rate can gradually subtract end to end for finishing
It is few；
8) it improves Controlled Rolling And Controlled Cooling and reduces the generation of on-line oxidation iron sheet, to further increase properties of product, reduce oxidation
Iron sheet production, overcomes the difficulty in equipment, the use of interstand cooling water must in place, in addition to wire rod can be improved after making good use of
Outside tissue and performance uniformity, also spinning adjustment, it is advantageous to enclose shape, while also reducing iron scale amount, good water tank guide groove wind
Mouth, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, periodically set to these
Standby structure carries out maintenance and repair, and maintenance and repair range restraint was at 3 times/two months.
The high line lumber recovery method for improving of the bar is by improving lumber recovery in the measure of heating zone raising lumber recovery, rolling zone
Measure, improve automatic control level reduction cut damage and improve Controlled Rolling And Controlled Cooling reduce on-line oxidation iron sheet generate four aspect
The high line lumber recovery of bar effectively and is successfully improved, facilitates enterprise efficiently and effectively to be implemented, improve implementation by hand
The rate that efficiency and high-speed bar mill are become a useful person is easy to use.
Embodiment three:
A kind of high line lumber recovery method for improving of bar, comprising the following steps:
1) lumber recovery is improved by control heating zone, it is 7 that the temperature of heating, which controls the soaking time at 1400 DEG C, after temperature,
Hour, 1500 DEG C of temperature just begun to warm up in heating furnace, the in-furnace temperature of heating furnace is controlled at 1000 DEG C, sternly after heating
Lattice execute heating cycle, improve heating efficiency, promote billet heating temperature uniform, do not occur black print, reduce oxidization burning loss, keep
The working of a furnace is normal, reduces the maintenance difficulties at heating furnace bottom, guarantees production direct motion；
2) adjust finishing mill roll gap, roll the appearance of useless situation to reduce, it is necessary to assure the accuracy of finishing mill roll gap and
The uniformity of each class, it is ensured that workpiece front end bites steadily in finishing mill, and poker as-rolled condition is good, and plug-in unit, which glues iron phenomenon, to be reduced；
3) strict implement process system, it is ensured that it is correct that the red base size of each sortie is rolled in thick, so that rolling the red base of each sortie in thick
For the accuracy control of size 98%, workshop executes this system conscientiously, is adjusted to grasp state of arts at any time；
4) guide and guard are formulated and wears standard, accomplish that timing is replaced, piling of steel accident caused by preventing because of guide and guard excessive wear, by heap
The occurrence rate reduction and 0.01% of steel accident；
5) procedure creates conditions for next process, the executive condition of the conscientious supervisory system of workshop technician, reinforces
Management and examination, it is thick in roll stringent red base size selective examination dynamics, big squad leader's per tour inspection verifying carries out examination 50 to underproof
Member/passage, engineering department's sampling observation carry out post and skills training to underproof double examination, to each post operation work, and periodically every 5
It holds experience exchangement meeting secondary/moon, technical operation level is continuously improved, really implements standardized work；
6) it improves automatic control level reduction and cuts damage, improve flying shear automatic control level, shorten crop end length, avoid flying
Cutting head tail length degree it is long and caused by waste greatly, matched in flying shear shear velocity and information feedback speed, so that contracting
When the length end to end that is chopped, the stabilization of flying shear shearing avoids causing piling of steel；
7) routine adjustment and maintenance are carried out to the mechanical device of all loop-rising rolls, adjustment and maintenance range restraint are 4 times/two
Month, so that it is guaranteed that realizing that symmetrical rise covers, reasonable employment loop, by improving tension force, pruning rate can gradually subtract end to end for finishing
It is few；
8) it improves Controlled Rolling And Controlled Cooling and reduces the generation of on-line oxidation iron sheet, to further increase properties of product, reduce oxidation
Iron sheet production, overcomes the difficulty in equipment, the use of interstand cooling water must in place, in addition to wire rod can be improved after making good use of
Outside tissue and performance uniformity, also spinning adjustment, it is advantageous to enclose shape, while also reducing iron scale amount, good water tank guide groove wind
Mouth, water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, periodically set to these
Standby structure carries out maintenance and repair, and maintenance and repair range restraint was at 4 times/two months.
The high line lumber recovery method for improving of the bar is by improving lumber recovery in the measure of heating zone raising lumber recovery, rolling zone
Measure, improve automatic control level reduction cut damage and improve Controlled Rolling And Controlled Cooling reduce on-line oxidation iron sheet generate four aspect
The high line lumber recovery of bar effectively and is successfully improved, facilitates enterprise efficiently and effectively to be implemented, improve implementation by hand
The rate that efficiency and high-speed bar mill are become a useful person is easy to use.
The beneficial effects of the present invention are: improving lumber recovery strict implement heating cycle by heating zone processed, heating is improved
Efficiency, promotes billet heating temperature uniform, does not occur black print, reduces oxidization burning loss, keeps the working of a furnace normal, reduces heating furnace bottom
Maintenance difficulties guarantee production direct motion, the measure of lumber recovery are improved by implementing rolling zone, first adjustment finishing mill roll gap, thus
It reduces and rolls the appearance of useless situation, secondly strict implement process system, it is ensured that roll that the red base size of each sortie is correct, and workshop is practical in thick
This system is executed, is adjusted to grasp state of arts at any time, guide and guard is then formulated and wears standard, accomplishes that timing is replaced,
Piling of steel accident caused by preventing because of guide and guard excessive wear, finally, a procedure creates conditions for next process, workshop technician
The executive condition of conscientious supervisory system, strengthens management and examines, it is thick in roll stringent red base size selective examination dynamics, technology is continuously improved
Operation is horizontal, really implements standardized work, improves automatic control level reduction and cuts damage, improves automatic control level reduction and cuts
Damage improves flying shear automatic control level, avoids wasting greatly, while also reasonably to use loop, by improving tension force, essence
Whole pruning rate end to end can gradually decrease, then reduce the generation of on-line oxidation iron sheet, interstand cooling by improving Controlled Rolling And Controlled Cooling
The use of water is in place, also advantageous to adjustment spinning circle shape other than tissue and performance uniformity that wire rod can be improved, while
Iron scale amount is reduced, good water tank guide groove tuyere, water nozzle gap, correctly maintenance and the raising of water tank hydraulic pressure can all be reduced
The generation of finished product iron scale, it is whole from the multi-faceted lumber recovery for improving high-speed bar mill, implement simply and step is clear,
Enterprise is facilitated efficiently and effectively to be implemented, the rate that the efficiency and high-speed bar mill for improving implementation are become a useful person is easy to use.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of high line lumber recovery method for improving of bar, which comprises the following steps:
1) lumber recovery is improved by control heating zone, the soaking time that the temperature of heating is controlled at 1000-1400 DEG C, after temperature is
4-7 hours, temperature >=1100 DEG C just begun to warm up in heating furnace, after heating heating furnace in-furnace temperature control >=
850 DEG C, strict implement heating cycle improves heating efficiency, promotes billet heating temperature uniform, does not occur black print, reduces oxidation
Scaling loss keeps the working of a furnace normal, reduces the maintenance difficulties at heating furnace bottom, guarantees production direct motion；
2) finishing mill roll gap is adjusted, to reduce the appearance for rolling useless situation, it is necessary to assure the accuracy and Ge Ban of finishing mill roll gap
Uniformity, it is ensured that workpiece front end bites steadily in finishing mill, and poker as-rolled condition is good, plug-in unit glue iron phenomenon reduce；
3) strict implement process system, it is ensured that it is correct that the red base size of each sortie is rolled in thick, so that rolling the red base size of each sortie in thick
Accuracy control in 94%-98%, workshop executes this system conscientiously, is adjusted to grasp state of arts at any time；
4) guide and guard are formulated and wears standard, accomplish that timing is replaced, piling of steel accident caused by preventing because of guide and guard excessive wear, by piling of steel thing
Therefore occurrence rate reduce and≤0.01%；
5) procedure creates conditions for next process, and the executive condition of the conscientious supervisory system of workshop technician is strengthened management
And examination, it is thick in roll stringent red base size selective examination dynamics, big squad leader's per tour inspection verifying carries out examination 30-50 to underproof
Member/passage, engineering department's sampling observation to underproof double examination carry out post and skills training to each post operation work, periodically every
It holds experience exchangement meeting the 3-5 times/moon, technical operation level is continuously improved, really implements standardized work；
6) it improves automatic control level reduction and cuts damage, improve flying shear automatic control level, shorten crop end length, flying shear is avoided to cut
End to end length it is long and caused by waste greatly, matched in flying shear shear velocity and information feedback speed, so that being cut in shortening
End to end when length, the stabilization of flying shear shearing avoids causing piling of steel；
7) routine adjustment and maintenance are carried out to the mechanical device of all loop-rising rolls, adjustment and maintenance range restraint are 2-4 times/two
Month, so that it is guaranteed that realizing that symmetrical rise covers, reasonable employment loop, by improving tension force, pruning rate can gradually subtract end to end for finishing
It is few；
8) it improves Controlled Rolling And Controlled Cooling and reduces the generation of on-line oxidation iron sheet, to further increase properties of product, reduce iron scale
Production, overcomes the difficulty in equipment, and the use of interstand cooling water must in place, in addition to the tissue of wire rod can be improved after making good use of
Outside performance uniformity, also spinning adjustment, it is advantageous to enclose shape, while also reducing iron scale amount, good water tank guide groove tuyere,
Water nozzle gap, correctly maintenance and water tank hydraulic pressure improve the generation that can all reduce finished product iron scale, periodically to these equipment
Structure carries out maintenance and repair, and maintenance and repair range restraint was at 2-4 times/two months.
2. the high line lumber recovery method for improving of a kind of bar according to claim 1, which is characterized in that the adjustment finishing mill
During roll gap, also need to carry out technological improvement to guide and guard in finishing mill and cooling water, various work carries out perfect.
3. the high line lumber recovery method for improving of a kind of bar according to claim 1, which is characterized in that the formulation guide and guard mill
Damage standard includes periodic maintenance guide base plate, fastens screw everywhere on guide base plate and guarantee that rolled piece enters and leaves milling train
When, guide base plate does not shake, and keeps rolled piece head and tail more stable.
4. the high line lumber recovery method for improving of a kind of bar according to claim 1, which is characterized in that the step 2), step
It is rapid 3), step 4) and step 5) can integrally be referred to as rolling zone and improve lumber recovery measure.
5. the high line lumber recovery method for improving of a kind of bar according to claim 1, which is characterized in that the reasonable employment is living
Set, it is excessively high that usual loop will appear set amount, and guide wheel inordinate wear, the problems such as deflection and adjustment are incorrect will cause set in this way
It is asymmetric, it is therefore desirable to the utilization rate of device reasonably to be improved using loop, the step 6) and step 7) can integrally claim
For improve automatic control level reduction cut damage.
6. the high line lumber recovery method for improving of a kind of bar according to claim 1, which is characterized in that the high line is used
Controlled Rolling And Controlled Cooling have in terms of reducing iron scale generation, can not only reduce its decarburized depth and refinement crystal grain, also
The advantages of steel billet superficial oxidation iron sheet generates can be reduced.
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| CN201910495249.7A CN110180890A (en) | 2019-06-10 | 2019-06-10 | A kind of high line lumber recovery method for improving of bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111028589A (en) * | 2019-12-19 | 2020-04-17 | 首钢长治钢铁有限公司 | Metal rolling worker skill competition or skill identification actual operation assessment method |
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