CN108580550A - Effectively reduce the method for strip surface fatigue line defect and the preparation method of 5 line aluminium alloy cover material - Google Patents
Effectively reduce the method for strip surface fatigue line defect and the preparation method of 5 line aluminium alloy cover material Download PDFInfo
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- CN108580550A CN108580550A CN201810504267.2A CN201810504267A CN108580550A CN 108580550 A CN108580550 A CN 108580550A CN 201810504267 A CN201810504267 A CN 201810504267A CN 108580550 A CN108580550 A CN 108580550A
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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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
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- 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
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
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Abstract
A method of effectively reducing strip surface fatigue line defect, it is related to aluminium alloy production field, this method using lotion of the hot-rolling oil at concentrations up to 7vol%~10vol% by Hot Strip Rolling, increasing lubricant effect, to reduce frictional force, the surface quality of product is improved.Also, this method preheats 40~60min using 60~80 DEG C of lotion after roll change to working roll, while being fully warmed-up, moreover it is possible to which the effect for preferably playing lubrication is further reduced the possibility that tired line occurs.This method can effectively improve the quality and stability of alloy product, reduce production cost, enhance the market competitiveness of similar product.A kind of preparation method of 5 line aluminium alloy cover material comprising the above-mentioned method for effectively reducing strip surface fatigue line defect.The rolling throughput of the preparation method is high, and roller service life is long, can effectively improve production efficiency, reduces production cost, and obtain the product of high quality.
Description
Technical field
The present invention relates to aluminium alloy production fields, and strip surface fatigue line defect is effectively reduced in particular to one kind
Method and 5 line aluminium alloy cover material preparation method.
Background technology
Hot continuous rolling is the common processing method for preparing Aluminum sheets, in the prior art, 1 roughing mill of generally use and Duo Tai
The equipment for continuously rolling of finishing mill realizes the hot continuous rolling of Aluminum sheets.For example, the hot rolling of U.S.'s Aluminum sheets is generally set using 1+3 hot continuous rollings
Standby, i.e., 1 roughing mill adds three finishing mills.And it is domestic it is new in the recent period on some producers using 1+5 continuous hot rolling facilities or 1+4 heat
Equipment for continuously rolling.It is that efficient, yield is big that multi-frame continuous hot-rolling mill, which produces the characteristics of Aluminum sheets, can make full use of thermal energy.Meanwhile
Hot continuous rolling is higher for the quality requirement of product, if inappropriate technology, tired line defect can occurs on strip surface, cause fatigue
Line quality of lot accident.At this point, generally requiring to solve the problems, such as by shutting down roll change, it is interrupted so as to cause production, seriously affects
The stability of product quality and manufacturing schedule.
Invention content
The purpose of the present invention is to provide a kind of methods effectively reducing strip surface fatigue line defect, can effectively subtract
Few strip surface fatigue line defect, improves product qualification rate.The roll change number in the operation of rolling can also be reduced, roll is improved
Service life improves production efficiency.
Another object of the present invention is to provide a kind of preparation methods of 5 line aluminium alloy cover material, can roll and pass through
Amount is high, and roller service life is long, can effectively improve production efficiency, and obtains the product of high quality.
What the embodiment of the present invention was realized in：
A method of effectively reducing strip surface fatigue line defect comprising：
In the Hot Strip Rolling of 5 line aluminium alloys, carried out using the lotion of hot-rolling oil a concentration of 7vol%~10 vol%
Lubrication；
After replacing working roll every time, 40~60 min are preheated to working roll using 60~80 DEG C of lotions.
A kind of preparation method of 5 line aluminium alloy cover material comprising the above-mentioned strip surface fatigue line defect that effectively reduces
Method.
The advantageous effect of the embodiment of the present invention is：
An embodiment of the present invention provides a kind of methods effectively reducing strip surface fatigue line defect.On the one hand, inventor
One of an important factor for finding by itself labour, cause strip surface fatigue line defect, is 5 line aluminium alloys in the operation of rolling
Rub excessive reason between working roll.Therefore, inventor is in Hot Strip Rolling, using hot-rolling oil at concentrations up to 7vol%
The lotion of~10vol% increases lubricant effect, to reduce frictional force, improves the surface quality of product.On the other hand, it sends out
A person of good sense has found that the temperature difference of new roller and old roller can equally cause surface fatigue line defect after roll change, therefore, after each roll change,
40~60min is preheated to working roll using 60~80 DEG C of lotions, while being fully warmed-up, moreover it is possible to preferably play lubrication
Effect.The embodiment of the present invention through the above scheme, considerably reduces waste product caused by tired line defect, reduces the number of waste product
Amount, also effectively reduces energy consumption, improves rolling throughput, reduce rolling risk, effectively reduce production cost, also carry
High cover material product quality and stability, enhance the market competitiveness of similar product.
Another object of the present invention is to provide a kind of preparation methods of 5 line aluminium alloy cover material comprising above-mentioned effective
The method for reducing strip surface fatigue line defect.The rolling throughput of the preparation method is high, and roller service life is long, can be effective
Production efficiency is improved, reduces production cost, and obtain the product of high quality.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to a kind of method and 5 line aluminium alloys effectively reducing strip surface fatigue line defect of the embodiment of the present invention
The preparation method of cover material is specifically described.
An embodiment of the present invention provides a kind of methods effectively reducing strip surface fatigue line defect comprising：
In the Hot Strip Rolling of 5 line aluminium alloys, carried out using the lotion of hot-rolling oil a concentration of 7vol%~10 vol%
Lubrication；
After replacing working roll every time, 40~60min is preheated to the working roll using 60~80 DEG C of lotions.
Multi-frame continuous hot-rolling mill, which produces Aluminum sheets, has the characteristics of efficient, yield is big, can make full use of thermal energy.But
It is in existing hot continuous rolling technology, the problem of due to technique, tired line defect can occur on strip surface, cause tired line batch
Quality accident is measured, the stability of product quality and manufacturing schedule has been seriously affected.
In embodiments of the present invention, inventor is had found by the creative work of itself, and 5 be that aluminium closes during the rolling process
It rubs between gold and working roll excessive, is one of an important factor for causing strip surface fatigue line defect.And cause frictional force mistake
Big factor is then varied, for example, emulsion lubrication poor performance, work roll surface glue aluminium, seriously caused rough surface, aluminium close
The golden component difference etc. of itself.And existing hot continuous rolling process relative maturity, one of them any one link is changed
It is dynamic, it may cause chain reaction.Inventor has found after by unremitting effort, can be increased by the change to lotion
Lubricant effect improves the surface quality of product to reduce frictional force, in this way, to the change of prior art compared with
It is small, and the effect reached is more notable.
The quality of emulsion lubrication performance depends primarily on three aspects, is the complexity that oil is precipitated from lotion first,
This is the premise to form rolling lubrication；The viscosity for the oil phase being followed by precipitated, it determines the thickness of the oil film formed after oil precipitation
Degree, decides the height of dynamic lubrication ability；It is finally the type and quantity of lubricating additive in the oil phase being precipitated, decides side
Boundary lubricates.Lotion of the hot-rolling oil at concentrations up to 7vol%~10vol% is used in the embodiment of the present invention, compared with the existing technology
The lotion of concentration 0.5vol%~5vol% of use, lubricant effect tool are significantly improved, and all working roller is aluminium for 5
The roll-force of alloy decreases.For F2 working rolls, by F1 working rolls rolling aluminum alloy surface compared with
To be coarse, the more other working rolls of frictional force of aluminium alloy and F2 working rolls are all big, are the main rings for causing surface fatigue line defect
Section, therefore the raising of emulsion lubrication effect, the function and effect to F2 working rolls are also the most effectively.
Further, in embodiments of the present invention, it counts in parts by weight, hot-rolling oil includes：50~90 parts of mineral oil, oiliness
0.5~2 part of 10~25 parts of agent, 5~15 parts of extreme pressure agent and anti emulsifier.
Wherein, used mineral oil is 50~200mm in 40 DEG C of kinematic viscosity2/s.Under the range of viscosities, mineral
Oil can form the suitable oil film of thickness in work roll surface, effectively improve lubricant effect.
Oiliness improver includes at least one in castor oil, soybean oil, rapeseed oil, peanut oil, oleic acid, linoleic plus oleic acid ester
Kind.Extreme pressure agent includes at least one of phosphorous acid N-butyl, tricresyl phosphate and dialkyl dithiophosphate.Oiliness improver
The effect that the lubricity of enhancing mineral oil under condition of boundary lubrication, can be played with extreme pressure agent, can further increase lubrication
Effect reduces surface fatigue line.
Further, for different-alloy series, composition proportion has larger difference, rubbing between working roll
Wiping performance also has significant difference.And for a series of aluminium alloy, this species diversity is then less apparent, for common
5 line aluminium alloys may be used the method that the embodiment of the present invention is provided and reduce surface fatigue line defect, improve product quality.5
Line aluminium alloy is the wrought aluminium alloy using Mg as main alloy element, and magnesium content is properly termed as magnalium between 3%~5%
Alloy.Low with density, tensile strength is high, the high feature of elongation percentage.Preferably, 5 line aluminium alloys include 5182 aluminium alloys, 5083
At least one of aluminium alloy, 5A05 aluminium alloys and 5A06 aluminium alloys.
On the other hand, inventor has found that the temperature difference of new roller and old roller can equally cause surface fatigue line defect after roll change,
Therefore, after each roll change, new roller is adequately preheated very necessary.In embodiments of the present invention, using 60~80
DEG C lotion to working roll preheat 40~60 min.By the above-mentioned means, while being fully warmed-up to new roller, moreover it is possible to more
It is good that new roller is lubricated.Waste product caused by tired line defect is further reduced, reduces the quantity of waste product, also effectively reduces
Energy consumption, improves rolling throughput.
Optionally, every time after replacement working roll and between two passes, first working roll is ground.Working roll
Surface irregularity can cause being remarkably reinforced for working roll frictional force, so as to cause tired line defect, influence product quality.Mill
The surface uniform ground of working roll can be made by cutting, to better ensure that the quality of product.Further working roll is ground
The stock removal cut is 0.1~0.2mm/ times.Further, the F1 working roll and F2 working roll more serious for gluing aluminium situation,
Stock removal should reach 0.15~0.2mm/ times, and F3 working rolls and F4 working rolls should be reached 0.1~0.15mm/ times.Grinding
After the completion, the surface roughness of working roll is 0.95~1.05 μm.And the surface of working roll cannot have crackle, pit, roll marks, knife
The defects of flower (grinding wheel helix), bright line, vibrations line, cross hatch, bright line.
The embodiment of the present invention additionally provides a kind of preparation method of 5 line aluminium alloy cover material comprising above-mentioned to effectively reduce
The method of strip surface fatigue line defect.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
Present embodiments provide a kind of method effectively reducing strip surface fatigue line defect comprising：
It is processed using 5182 aluminium alloy of 1+4 continuous hot rolling facilities pair, it is a concentration of using hot-rolling oil in process
The lotion of 7vol% is lubricated.
Wherein, it counts in parts by weight, hot-rolling oil includes：50 parts of mineral oil, 10 parts of oiliness improver (castor oil and soybean oil), pole
Press 2 parts of 15 parts of agent (phosphorous acid N-butyl) and anti emulsifier.Mineral oil is 200mm in 40 DEG C of kinematic viscosity2/s。
When rolling throughput reaches 45~50 times, replaces working roll and working roll is ground after replacing working roll every time
It cuts, stock removal is 0.1~0.2mm/ times, and the surface roughness of working roll is 0.95~1.05 μm.Using 60 DEG C of above-mentioned emulsion
It is rolled after preheating 40min to working roll.
By above-mentioned processing mode, after tested, the roll-force of F1 working rolls reduces rolling for 12.7%, F2 working rolls
The roll-force that power processed reduces 25.3%, F3 working rolls reduces the roll-forces of 4.2%, F4 working rolls and reduces 3.8%, system
The product surface obtained does not find tired line defect.
Embodiment 2
Present embodiments provide a kind of method effectively reducing strip surface fatigue line defect comprising：
It is processed using 5083 aluminium alloy of 1+4 continuous hot rolling facilities pair, it is a concentration of using hot-rolling oil in process
The lotion of 10vol% is lubricated.
Wherein, it counts in parts by weight, hot-rolling oil includes：90 parts of mineral oil, 15 parts of oiliness improver (peanut oil and oleic acid), extreme pressure
0.5 part of 10 parts of agent (tricresyl phosphate) and anti emulsifier.Mineral oil is 50mm in 40 DEG C of kinematic viscosity2/s。
When rolling throughput reaches 45~50 times, replaces working roll and working roll is ground after replacing working roll every time
It cuts, stock removal is 0.1~0.2mm/ times, and the surface roughness of working roll is 0.95~1.05 μm.Using 60 DEG C of above-mentioned emulsion
It is rolled after preheating 60min to working roll.
By above-mentioned processing mode, after tested, the roll-force of F1 working rolls reduces rolling for 10.6%, F2 working rolls
The roll-force that power processed reduces 23.8%, F3 working rolls reduces the roll-forces of 3.2%, F4 working rolls and reduces 3.4%, system
The product surface obtained does not find tired line defect.
Embodiment 3
Present embodiments provide a kind of method effectively reducing strip surface fatigue line defect comprising：
5A05 aluminium alloys are processed using 1+4 continuous hot rolling facilities, it is a concentration of using hot-rolling oil in process
The lotion of 8vol% is lubricated.
Wherein, it counts in parts by weight, hot-rolling oil includes：70 parts of mineral oil, 25 parts of oiliness improver (castor oil and linoleic acid), pole
Press 1 part of 5 parts of agent (dialkyl dithiophosphate) and anti emulsifier.Mineral oil is 100mm in 40 DEG C of kinematic viscosity2/s。
When rolling throughput reaches 45~50 times, replaces working roll and working roll is ground after replacing working roll every time
It cuts, stock removal is 0.1~0.2mm/ times, and the surface roughness of working roll is 0.95~1.05 μm.Using 80 DEG C of above-mentioned emulsion
It is rolled after preheating 40min to working roll.
By above-mentioned processing mode, after tested, the roll-force of F1 working rolls reduces rolling for 11.6%, F2 working rolls
The roll-force that power processed reduces 24.5%, F3 working rolls reduces the roll-forces of 3.3%, F4 working rolls and reduces 2.9%, system
The product surface obtained does not find tired line defect.
Embodiment 4
Present embodiments provide a kind of method effectively reducing strip surface fatigue line defect comprising：
5A06 aluminium alloys are processed using 1+4 continuous hot rolling facilities, it is a concentration of using hot-rolling oil in process
The lotion of 10vol% is lubricated.
Wherein, it counts in parts by weight, hot-rolling oil includes：60 parts of mineral oil, 20 parts of oiliness improver (oleate), extreme pressure agent (two
Alkyl dithiophosphoric acid salt) 8 parts and 1 part of anti emulsifier.Mineral oil is 130mm in 40 DEG C of kinematic viscosity2/s。
When rolling throughput reaches 45~50 times, replaces working roll and working roll is ground after replacing working roll every time
It cuts, stock removal is 0.1~0.2mm/ times, and the surface roughness of working roll is 0.95~1.05 μm.Using 80 DEG C of above-mentioned emulsion
It is rolled after preheating 50min to working roll.
By above-mentioned processing mode, after tested, the roll-force of F1 working rolls reduces rolling for 12.0%, F2 working rolls
The roll-force that power processed reduces 26.8%, F3 working rolls reduces the roll-forces of 5.3%, F4 working rolls and reduces 4.9%, system
The product surface obtained does not find tired line defect.
Test example
By taking the production of 5182 aluminium alloy strips as an example, the production line is recorded from July, 2015 to during in December, 2016
The condition of production.Wherein, in July, 2015 in January, 2016 is the conventional mode of production, and 2 months in July, 2016 in 2016 is technique tune
The examination phase from August, 2016, starts the method for effectively reducing strip surface fatigue line defect for carrying out the embodiment of the present invention 1, note
The results are shown in Table 1 for record.
1. 5182 aluminium alloy strips of table produce result
As can be seen from Table 2, there is more frequency in the aluminium alloy strips made from July, 2015 in January, 2016, tired line
It is numerous, it has been up to 21.3% tired line ratio.Within the process debugging phase in 2 months in July, 2016 in 2016, tired line
The frequency of appearance is preferably improved.Until after the technical maturity of in August, 2016 is promoted, have been able to overcome strip surface tired completely
Labor line defect.Phase after manufacture, even if amplification production can still ensure and occur without tired line, greatly increase to volume 180
Product quality and production efficiency.And after improvement, the rolling throughput of the working roll of replacement has been increased to 50 by 35 pieces/time
Block/time, reduce roll change frequency, improves the service life to working roll, further production efficiency is made to be improved.
In conclusion an embodiment of the present invention provides a kind of methods effectively reducing strip surface fatigue line defect.One side
One of an important factor for face, inventor has found by itself labour, causes strip surface fatigue line defect, be in the operation of rolling 5
Rub excessive reason between line aluminium alloy and working roll.Therefore, inventor is high using hot rolling oil concentration in Hot Strip Rolling
Increase lubricant effect up to the lotion of 7 vol%~10vol%, to reduce frictional force, improves the surface quality of product.Separately
On the one hand, inventor has found that the temperature difference of new roller and old roller can equally cause surface fatigue line defect after roll change, therefore, every
After secondary roll change, 40~60min is preheated to working roll using 60~80 DEG C of lotions, while being fully warmed-up, moreover it is possible to preferably
Play the effect of lubrication.The embodiment of the present invention through the above scheme, considerably reduces waste product caused by tired line defect, reduces
The quantity of waste product, also effectively reduces energy consumption, improves rolling throughput, reduce rolling risk, effectively reduce life
Cost is produced, cover material product quality and stability is also improved, enhances the market competitiveness of similar product.
Another object of the present invention is to provide a kind of preparation methods of 5 line aluminium alloy cover material comprising above-mentioned effective
The method for reducing strip surface fatigue line defect.The rolling throughput of the preparation method is high, and roller service life is long, can be effective
Production efficiency is improved, reduces production cost, and obtain the product of high quality.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method effectively reducing strip surface fatigue line defect, which is characterized in that including：
In the Hot Strip Rolling of 5 line aluminium alloys, it is lubricated using the lotion of a concentration of 7vol%~10vol% of hot-rolling oil；
After replacing working roll every time, 40~60min is preheated to the working roll using 60~80 DEG C of the lotions.
2. according to the method described in claim 1, it is characterized in that, 5 line aluminium alloy includes 5182 aluminium alloys, the conjunction of 5083 aluminium
At least one of gold, 5A05 aluminium alloys and 5A06 aluminium alloys.
3. according to the method described in claim 1, it is characterized in that, counting in parts by weight, the hot-rolling oil includes：Mineral oil 50
0.5~2 part of~90 parts, 10~25 parts of oiliness improver, 5~15 parts of extreme pressure agent and anti emulsifier.
4. according to the method described in claim 3, it is characterized in that, the mineral oil 40 DEG C kinematic viscosity be 50~
200mm2/s。
5. according to the method described in claim 3, it is characterized in that, the oiliness improver include castor oil, soybean oil, rapeseed oil,
At least one of peanut oil, oleic acid, linoleic plus oleic acid ester.
6. according to the method described in claim 3, it is characterized in that, the extreme pressure agent includes phosphorous acid N-butyl, tripotassium phosphate
At least one of phenolic ester and dialkyl dithiophosphate.
7. according to the method described in claim 1, it is characterized in that, after replacing the working roll every time and two passes
Between, first the working roll is ground.
8. the method according to the description of claim 7 is characterized in that the stock removal that the working roll is ground be 0.1~
0.2mm/ times.
9. according to the method described in claim 8, it is characterized in that, after the completion of grinding, the surface roughness of the working roll is
0.95~1.05 μm.
10. a kind of preparation method of 5 line aluminium alloy cover material, which is characterized in that including as described in any one of claim 1~9
The method for effectively reducing strip surface fatigue line defect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810504267.2A CN108580550A (en) | 2018-05-23 | 2018-05-23 | Effectively reduce the method for strip surface fatigue line defect and the preparation method of 5 line aluminium alloy cover material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504267.2A CN108580550A (en) | 2018-05-23 | 2018-05-23 | Effectively reduce the method for strip surface fatigue line defect and the preparation method of 5 line aluminium alloy cover material |
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Application publication date: 20180928 |