CN109702011A - A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide and its production method - Google Patents
A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide and its production method Download PDFInfo
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- CN109702011A CN109702011A CN201910182995.0A CN201910182995A CN109702011A CN 109702011 A CN109702011 A CN 109702011A CN 201910182995 A CN201910182995 A CN 201910182995A CN 109702011 A CN109702011 A CN 109702011A
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Abstract
The invention discloses a kind of tape measure 50 steel cold-rolled strips of high-precision ultra-wide and its production method, it is characterised in that: it includes the following steps completion: producing with a thickness of 3.25~3.5mm, the 50 steel hot rolled strips that width is 1260~1510mm；Pickling trimming；Once cold rolling；Primary annealing；Secondary cold-rolling；Loose winding；Double annealing；It is smooth；Oiling storage is made with a thickness of 0.30~0.35mm, the 50 steel cold-rolled strip of tape measure high-precision ultra-wide that width is 1250~1500mm.The present invention using six roller reversible cold rolling milling train of 1700mm single chassis and 100 tons of perhydro bright cover type annealing stoves due to being produced, and rolling number is few, production process is simple, annealing temperature and low energy consumption；The steel band, plate shape is straight, surface uniformity, and plate face bubble-free is mingled with, the defects of striped, color difference, side are split, and has reached the quality requirement of 50 steel cold-rolled strip of tape measure high-precision ultra-wide.
Description
Technical field
The present invention relates to the improvement that a kind of tape measure is produced with 50 steel cold-rolled strips, specifically a kind of tape measure high-precision
50 steel cold-rolled strip of ultra-wide and its production method, the tape measure 50 steel cold-rolled strip of high-precision ultra-wide with a thickness of 0.30~
0.35mm, and thickness deviation -0.005~+0.005mm, width are 1250~1500mm, and 0~+0.5mm of width difference；Plate shape
Smooth, plate face bubble-free is mingled with, the defects of striped, color difference, side are split, and 470~560MPa of tensile strength is suitable for production tape measure.
Background technique
50 steel belong to middle carbon high intensity structural carbon steel, have high-intensitive and high rigidity, are usually used in manufacturing dynamic load, impact
Load and the machine components for requiring wear-resisting property good, such as forging gear, pull rod, spring washer, tape measure.50 steel are as high quality carbon
The pith of plain structural steel series has good intensity, machining property, excellent heat under modifier treatment state
Handle adaptability.The thickness and precision of current common 50 steel cold-rolled strip is ± 0.02mm, and width accuracy is 0~+2mm, plate shape
Aspect the defects of there are side waves, middle wave, unrestrained rib, there is the defects of being mingled with, blackspot, scratch, color difference, uneven roughness in surface.
By retrieval it is found that tape measure cold-rolled strip is it has been reported that as how glad, Sun Hongzao was in 1991 for Xinyu Iron and Steel General Works, Jiangxi at present
Delivered on 6th phase " Jiangxi Metallurgical " paper " cold rolling tape measure with steel band produce in quality control " in propose with a thickness of
2.75mm, the steel band that width is 55mm roll target thickness after 1 spheroidizing, 2 annealing through 4 rolling processes, middle base；It is deposited
Deficiency be rolling process is more, annealing times are more, spheroidizing temperature it is 730 DEG C high~750 DEG C, production process complexity, low efficiency, life
It produces at high cost.For another example Wuhan Iron and Steel Plant group E Gang company Wang Xiaodong, Shao Lan, Hong Jun, Fang Bin was delivered in " Liu Gang science and technology " in 2009
It proposes to be cold-rolled to after 4 cold rollings, 2 annealing with a thickness of the steel band of 2.5mm in paper " the 50 cold rolling of strip steel hole analysis of causes "
The problem of finished product, there is also rollings often, production process complexity, low efficiency, high production cost.It is thick to have not yet to see production
Degree is 0.30~0.35mm, and width is the report of the 50 steel cold-rolled strip of tape measure high-precision ultra-wide of 1250~1500mm.
Summary of the invention
It is 1250~1500mm, ruler that it is an object of the present invention to provide one kind with a thickness of 0.30~0.35mm, width
Very little precision is high, plate shape is straight, intensity is high, it is boundless split, the tape measure of short route, low cost 50 steel cold-rolled strip of high-precision ultra-wide.
In order to reach the goals above, the technical scheme adopted by the invention is that: a kind of tape measure 50 steel of high-precision ultra-wide
Cold-rolled strip, it is characterised in that: it is 1250~1500mm with a thickness of 0.30~0.35mm, width；It is by 50 steel hot rolled strips
It is made, the chemical component (wt%) of used 50 steel hot rolled strip are as follows: C:(0.5~0.55) %, Si:(0.2~0.25) %,
Mn:(0.50~0.70) %, P:(0.010~0.025) %, S:(0.005~0.015) %, Cr:(0.13~0.16) %, Ni:
(0.20~0.30) %, Cu:(0.20~0.25) %, Als:(0.01~0.015) %, remaining is Fe and inevitable impurity.
It is another object of the present invention to provide a kind of tape measure production method of 50 steel cold-rolled strip of high-precision ultra-wide,
Its process flow is simple, easy to operate, successively passes through the plug-type chlorohydric acid pickling unit of 1580mm to 50 steel hot rolled strips of production
Pickling and trimming, six roller reversible cold rolling milling train of 1700mm single chassis first time rolling, 100 tons of perhydro bright cover type annealing stoves
First time annealing, second of six roller reversible cold rolling milling train of 1700mm single chassis rolling, 1700mm rewinding unit loose winding,
Second of annealing of 100 tons of perhydro bright cover type annealing stoves, 1700mm single stand four-roller planisher smooth, 1700mm rewinding
Tape measure 50 steel cold-rolled strip of high-precision ultra-wide is made in the oiling of unit.
In order to reach the goals above, the technical scheme adopted by the invention is that: a kind of above-mentioned tape measure high-precision ultra-wide
The production method of 50 steel cold-rolled strips, it is characterised in that: it includes the following steps completion:
1) 50 steel hot rolled strips, are produced: after the desulfurizing iron produced, being connected through converter smelting, the refining of LF furnace, slab caster
Casting, heating and tandem mill hot rolling control its chemical component (wt%) satisfaction: C:(0.5~0.55) %, Si:(0.2~0.25) %,
Mn:(0.50~0.70) %, P:(0.010~0.025) %, S:(0.005~0.015) %, Cr:(0.13~0.16) %, Ni:
(0.20~0.30) %, Cu:(0.20~0.25) %, Als:(0.01~0.015) %, remaining is Fe and inevitable impurity, system
It obtains with a thickness of 3.25~3.5mm, the 50 steel hot rolled strips that width is 1260~1510mm；
2) pickling and trimming, pickling trimming: are carried out to 50 steel hot rolled strips using the plug-type chlorohydric acid pickling unit of 1580mm；
3), once cold rolling: first time cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 6~8 rolling roads
The secondary chill steel band of 50 steel being rolled to a thickness of 0.8~1.0mm；
4) it, primary annealing: is once annealed in 100 tons of perhydro bright cover type annealing stoves；
5), secondary cold-rolling: second of cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 3~5 rolling roads
The secondary chill steel band of 50 steel being rolled to a thickness of 0.30~0.35mm；
6), loose winding: loose winding is carried out using four sections of ladder tension of 1700mm rewinding unit；
7), double annealing: double annealing is carried out in 100 tons of perhydro bright cover type annealing stoves；
8), smooth: to be carried out using 1700mm single stand four-roller planisher smooth；
9), oiling is put in storage: being packed and stored after carrying out oiling using 1700mm rewinding unit, tape measure 50 steel of high-precision ultra-wide is made
Cold-rolled strip.
In step 1), LF furnace refining time: 30~40min, soft argon blowing time: 10~15 min；When tandem mill hot rolling, plate
Base hot-loading and hot-conveying, temperature control is at 400 DEG C~430 DEG C before slab enters heating stove heating, slow cooling after coil of strip is offline, soaking zone
Temperature is controlled at 1300 DEG C ± 20 DEG C；Finish rolling finishing temperature is controlled at 870 DEG C ± 20 DEG C, and oiler temperature control is at 670 DEG C ± 20
℃；The 50 steel hot rolled strip, plate shape is smooth, plate face without raw edges, shiny black line, peeling, be mingled with, iron scale and foreign matter indentation, roller
The defects of print, side damage；The shim values of 50 steel hot rolled strips: 0~0.03mm, 0.03~0.05mm of strip crown value.
In step 2, when pickling, 1%~3% inhibition is added in the 6# acid tank of the plug-type chlorohydric acid pickling unit of 1580mm
Fog inhibitor, to improve the finish of 50 steel pickling steel band plate faces；It is cut using two edge of the circle shear to 50 steel pickling steel bands
Side, lap control is controlled in 0.15~0.20mm, side clearance in 0.36~0.38mm, to avoid cold in next procedure when matching knife
It rolls in the operation of rolling and the disconnected band accident of raw edges occurs, the width of steel band is 1250~1500mm after trimming, passes through circle shear opening degree
Width automatic regulating function makes the width accuracy of 50 steel pickling steel bands reach 0~+0.5mm.
In step 3), when first time cold rolling, the concentration of emulsion used control of six roller reversible cold rolling milling train of 1700mm single chassis exists
1.5~2.0%；93~97HSD of hardness of roll body, the 0.5~0.7um of roughness of working roll, total reduction are controlled 71~75%；
The AGC for S7-400 Siemens PLC Program and FM458 the module control having by six roller reversible cold rolling milling train of 1700mm single chassis
Gauge automatic control function realizes that the thickness and precision of the chill steel band of 50 steel reaches -0.01~+0.01mm.
In step 4), when annealing for the first time, 420 DEG C~450 DEG C of 2~4h are arranged in 100 tons of perhydro bright cover type annealing stoves
Heat preservation platform, heat up at full speed before keeping the temperature platform temperature, temperature be greater than heat preservation platform temperature after heating rate according to 35 DEG C
~40 DEG C/h is controlled, heat preservation when rising to 680 DEG C~700 DEG C, keeps the temperature 10~12h, 2~4h of bored cover after heat preservation；Pass through
The burning of the external burner of the heating mantles of 100 tons of perhydro bright cover type annealing stoves, makes the uniformity of temperature profile in heating mantles, from
And guarantee the uniformity of the 50 steel cold-rolled strip physical properties of 0.8~1.0mm.
In step 5), when second of cold rolling, the concentration of emulsion used control of six roller reversible cold rolling milling train of 1700mm single chassis exists
2.5~3.0%；The total reduction of working roll is controlled 62.5~65%；Have by six roller reversible cold rolling milling train of 1700mm single chassis
The AGC gauge automatic control function of some S7-400 Siemens PLC Programs and the control of FM458 module, realizes 0.30~0.35mm
The thickness and precision of the chill steel band of 50 steel reach -0.005~+0.005mm.
In step 6), when loose winding, 1700mm rewinding unit is by coil of strip again online uncoiling and batches, the first rank when loose winding
Duan Zhangli is 20~23kN, second stage tension is 15~17 kN, phase III tension is 11~13kN, fourth stage tension
For 7~9kN, to prevent coil of strip from generating bonding defect in anneal；Speed of service control is led in 300~350m/min
The uncoiler CPC automatic centering control function of crossing 1700mm rewinding unit, makes steel band be directed at unit centre line always, passes through
The EPC Edge position control following function of 1700mm rewinding unit, solves the problems, such as coil of strip staggered floor and tower-shaped defect.
In step 7), when annealing for the second time, 450 DEG C~470 DEG C of 2~4h are arranged in 100 tons of perhydro bright cover type annealing stoves
Heat preservation platform, heat up at full speed before keeping the temperature platform temperature, temperature be greater than heat preservation platform temperature after heating rate according to 35 DEG C
~40 DEG C/h is controlled, heat preservation when rising to 640 DEG C~660 DEG C, keeps the temperature 10~12h, 2~4h of bored cover after heat preservation.Pass through
The burning of the external burner of the heating mantles of 100 tons of perhydro bright cover type annealing stoves, makes the uniformity of temperature profile in heating mantles, from
And it ensure that the uniformity of the 50 steel cold-rolled strip physical properties of 0.30~0.35mm.
In step 8), when smooth, the uncoiling tension of 1700mm single stand four-roller planisher is 20~25kN, and machine forward pull is
7~9kN, machine backward pull are 7~9kN, and coiling tension is 30~35kN, and skin pass rolling power is 2800~3000kN；Pass through
The pressure of 1700mm single stand four-roller planisher and the APC automatic control function of position closed loop, realize the accurate control of elongation percentage,
Reach in every meter of length range of product that amounts of thickness variation is less than 0.3%, Strength Changes amount is less than 1% in every meter of length range；Pass through
The positive and negative hydraulic bending roll of working roll of 1700mm single stand four-roller planisher and the unilateral bias adjusting function of pressure, guarantee the shape wave of product
Highly≤2mm；The working roll of 1700mm single stand four-roller planisher is the work after texturing that roughness is 1.5~2.0 μm
Roller makes the surface roughness of the 50 steel cold-rolled strips of 0.30~0.35mm reach 0.6~1.0 μm.
In step 9), when oiling, opens a book on 1700mm rewinding unit, pass through Electrostatic greasing in uncoiling, coiling process
The effect of the high-voltage electrostatic field of machine and marginal discharge function, by the rapid mist of oil liquid of the antirust oil flowed out from knife beam cutting edge radius
Change, and the upper and lower surfaces for being adsorbed in the 50 steel cold-rolled strips of 0.30~0.35mm form equally distributed oil film, it is quiet when oiling
The operating voltage control of electropaining oil machine applies fuel-flow control in 0.3~0.6g/m in 40~70kV2, to solve holiday, oiling not
, the problem of oil mass cannot accurately control is applied.
The beneficial effects of the present invention are: compared with 50 common steel cold-rolled strips, the present invention is due to mono- using 1700mm
Six roller reversible cold rolling milling train of rack and 100 tons of perhydro bright cover type annealing stoves are produced, the few, production process with rolling number
Simply, the advantages of entire volume rolling efficiency height, annealing temperature and low energy consumption；It is produced by the invention with a thickness of 0.30~
0.35mm, the tape measure that width is 1250~1500mm 50 steel cold-rolled strips of high-precision, dimensional accuracy height (its thickness deviation :-
0.005~+0.005mm, width difference: 0~+0.5mm), plate shape is straight (shape wave height≤2mm), surface uniformity, plate face
Bubble-free is mingled with, the defects of striped, color difference, side are split, and roughness reaches 0.6~1.0 μm of m, and tensile strength reaches 470~
560MPa has reached the quality requirement of 50 steel cold-rolled strip of tape measure high-precision ultra-wide, has had a vast market foreground.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Embodiment 1:
In our company, produce with a thickness of 0.30mm, the 50 steel cold-rolled strip of tape measure high-precision ultra-wide that width is 1250mm.
A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it is with a thickness of 0.30mm, width
1250mm；It is made of 50 steel hot rolled strips, the chemical component (wt%) of used 50 steel hot rolled strip are as follows: C:0.5%, Si:
0.2%, Mn:0.70%, P:0.010%, S:0.005%, Cr:0.13%, Ni:0.20%, Cu:0.20%, Als:0.015%, remaining is
Fe and inevitable impurity.
The production method of above-mentioned a kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it includes following
Step is completed:
1) 50 steel hot rolled strips, are produced: after the desulfurizing iron produced, being connected through converter smelting, the refining of LF furnace, slab caster
Casting, heating and tandem mill hot rolling, control its chemical component (wt%) satisfaction: C:0.5%, Si:0.2%, Mn:0.70%, P:0.010%,
S:0.005%, Cr:0.13%, Ni:0.20%, Cu:0.20%, Als:0.015%, remaining is Fe and inevitable impurity, is made
With a thickness of 3.25mm, the 50 steel hot rolled strips that width is 1260mm；
LF furnace refining time: 40min, soft argon blowing time: 15min；When tandem mill hot rolling, steel slab hot sending, slab, which enters, to be added
At 430 DEG C, slow cooling after coil of strip is offline, soaking section temperature is controlled at 1320 DEG C for temperature control before hot stove heating；Finish rolling finish to gauge temperature
Degree control is at 890 DEG C, and oiler temperature control is at 650 DEG C；The shim values of 50 steel hot rolled strips: 0mm, strip crown value 0.03mm；It is logical
The content reduction and the offline rear hot-loading and hot-conveying of slab, slow cooling after coil of strip is offline for crossing C, Si, Cr in chemical component are reduced cold
Roll the disconnected band probability of raw edges in the operation of rolling；And plate shape is smooth, plate face without raw edges, shiny black line, peeling, be mingled with, iron scale and
The defects of foreign matter indentation, roll marks, side damage；
2) pickling and trimming, pickling trimming: are carried out to 50 steel hot rolled strips using the plug-type chlorohydric acid pickling unit of 1580mm；It removes
The iron scale on 50 steel hot rolled strip surfaces becomes 50 steel pickling steel bands；
When pickling, 1% corrosion-retarding fog inhibitor is added, in the 6# acid tank of the plug-type chlorohydric acid pickling unit of 1580mm to improve 50 steel
The finish of pickling steel band plate face；Trimming is carried out using two edge of the circle shear to 50 steel pickling steel bands, lap control when matching knife
System is in 0.20mm, and side clearance control is in 0.36mm, to avoid occurring raw edges disconnected band accident during next procedure cold rolling,
The width of steel band makes the width of 50 steel pickling steel bands by circle shear opening degree width automatic regulating function for 1250mm after trimming
Degree precision reaches 0~+0.5mm；
3), once cold rolling: first time cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 8 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 0.8mm；
When first time cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 2.0%；Working roll
Hardness of roll body 97HSD, roughness 0.7um, total reduction are controlled 75%；Pass through six roller reversible cold rolling milling train of 1700mm single chassis
The AGC gauge automatic control for S7-400 Siemens PLC Program and FM458 the module control having the function of, realizes the chill steel of 50 steel
The thickness and precision of band reaches -0.01~+0.01mm；
4) it, primary annealing: is once annealed in 100 tons of perhydro bright cover type annealing stoves；
When annealing for the first time, 420 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stove setting 4h, in heat preservation platform temperature
It heats up at full speed before degree, heating rate is controlled according to 35 DEG C/h after temperature is greater than heat preservation platform temperature, guarantor when rising to 680 DEG C
Temperature keeps the temperature 12h, bored cover 4h after heat preservation；Pass through the external burners of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
Burning, makes the uniformity of temperature profile in heating mantles, to guarantee the uniformity of 50 steel cold-rolled strip physical properties；
5), secondary cold-rolling: second of cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 5 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 0.30mm；
When second of cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 3.0%；Working roll
Total reduction is controlled 62.5%；The S7-400 Siemens PLC Program having by six roller reversible cold rolling milling train of 1700mm single chassis
With the AGC gauge automatic control function of FM458 module control, realize the thickness and precision of the chill steel band of 50 steel reach -0.005~+
0.005mm；
6), loose winding: loose winding is carried out using four sections of ladder tension of 1700mm rewinding unit；
When loose winding, 1700mm rewinding unit is by coil of strip again online uncoiling and batches, first stage tension when loose winding be 20kN,
Second stage tension is 15kN, phase III tension is 11kN, fourth stage tension is 7kN, to prevent coil of strip from moving back in annealing furnace
Bonding defect is generated when fiery；The speed of service is controlled in 300m/min, passes through the uncoiler CPC automatic centering of 1700mm rewinding unit
Control function makes steel band be directed at unit centre line always, passes through the EPC Edge position control following function of 1700mm rewinding unit, solution
Certainly coil of strip staggered floor and the problem of tower-shaped defect；
7), double annealing: double annealing is carried out in 100 tons of perhydro bright cover type annealing stoves；
When second of annealing, 450 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stoves setting 4h, in heat preservation platform temperature
It heats up at full speed before degree, heating rate is controlled according to 35 DEG C/h after temperature is greater than heat preservation platform temperature, guarantor when rising to 640 DEG C
Temperature keeps the temperature 12h, bored cover 4h after heat preservation；Pass through the external burners of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
Burning, makes the uniformity of temperature profile in heating mantles, to ensure that the uniformity of 50 steel cold-rolled strip physical properties；
8), smooth: to be carried out using 1700mm single stand four-roller planisher smooth；
When smooth, the uncoiling tension of 1700mm single stand four-roller planisher is 20kN, and machine forward pull is 7kN, and machine backward pull is
7kN, coiling tension 30kN, skin pass rolling power are 2800kN；Pressure and position by 1700mm single stand four-roller planisher
The APC automatic control function of closed loop realizes the accurate control of elongation percentage, and it is small to reach amounts of thickness variation in every meter of length range of product
Strength Changes amount is less than 1% in 0.3%, every meter of length range；Working roll by 1700mm single stand four-roller planisher is positive and negative
Hydraulic bending roll and the unilateral bias adjusting function of pressure, the shape wave height of product are 2mm；The working roll of 1700mm single stand four-roller planisher
The working roll after texturing for being 1.5 μm for roughness makes the surface roughness of 50 steel cold-rolled strips reach 0.6 μm；
9), oiling is put in storage: being packed and stored after carrying out oiling using 1700mm rewinding unit, tape measure 50 steel of high-precision ultra-wide is made
Cold-rolled strip；
When oiling, opens a book on 1700mm rewinding unit, pass through the high-voltage electrostatic field of electrostatic oiler in uncoiling, coiling process
Effect and marginal discharge function, the oil liquid of the antirust oil flowed out from knife beam cutting edge radius is atomized rapidly, and be adsorbed in 50 steel
The upper and lower surfaces of cold-rolled strip form equally distributed oil film, when oiling, the operating voltage control of electrostatic oiler in 70kV,
Fuel-flow control is applied in 0.6g/m2, so that solving the problems, such as that holiday, oiling are uneven, apply oil mass cannot accurately control.
Through detecting, produced tape measure 50 steel cold-rolled strip of high-precision ultra-wide with a thickness of 0.30mm, width 1250mm,
Its thickness deviation is in -0.005~+0.005mm range, width difference 0.5mm, and shape wave height is 2mm, and plate shape is straight, surface
Uniformity, plate face bubble-free are mingled with, the defects of striped, color difference, side are split, and roughness reaches 0.6 μm of m, and tensile strength reaches
560MPa has reached the quality requirement of 50 steel cold-rolled strip of tape measure high-precision ultra-wide.
Embodiment 2:
In our company, produce with a thickness of 0.32mm, the 50 steel cold-rolled strip of tape measure high-precision ultra-wide that width is 1360mm.
A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it is with a thickness of 0.32mm, width
1360mm；It is made of 50 steel hot rolled strips, the chemical component (wt%) of used 50 steel hot rolled strip are as follows: C:0.53%, Si:
0.22%, Mn:0.60%, P:0.020%, S:0.009%, Cr:0.14%, Ni:0.26%, Cu:0.24%, Als:0.012%, remaining is
Fe and inevitable impurity.
The production method of above-mentioned a kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it includes following
Step is completed:
1) 50 steel hot rolled strips, are produced: after the desulfurizing iron produced, being connected through converter smelting, the refining of LF furnace, slab caster
Casting, heating and tandem mill hot rolling control its chemical component (wt%) satisfaction: C:0.53%, Si:0.22%, Mn:0.60%, P:
0.020%, S:0.009%, Cr:0.14%, Ni:0.26%, Cu:0.24%, Als:0.012%, remaining for Fe and inevitably it is miscellaneous
Matter is made with a thickness of 3.3mm, the 50 steel hot rolled strips that width is 1370mm；
LF furnace refining time: 35min, soft argon blowing time: 12min；When tandem mill hot rolling, steel slab hot sending, slab, which enters, to be added
At 420 DEG C, slow cooling after coil of strip is offline, soaking section temperature is controlled at 1300 DEG C for temperature control before hot stove heating；Finish rolling finish to gauge temperature
Degree control is at 870 DEG C, and oiler temperature control is at 670 DEG C；The shim values of 50 steel hot rolled strips: 0.02mm, strip crown value
0.04mm；
2) pickling and trimming, pickling trimming: are carried out to 50 steel hot rolled strips using the plug-type chlorohydric acid pickling unit of 1580mm；
When pickling, 2% corrosion-retarding fog inhibitor is added, in the 6# acid tank of the plug-type chlorohydric acid pickling unit of 1580mm to improve 50 steel
The finish of pickling steel band plate face；Trimming is carried out using two edge of the circle shear to 50 steel pickling steel bands, lap control when matching knife
System is in 0.18mm, and side clearance control is in 0.37mm, to avoid occurring raw edges disconnected band accident during next procedure cold rolling,
The width of steel band makes the width of 50 steel pickling steel bands by circle shear opening degree width automatic regulating function for 1360mm after trimming
Degree precision reaches 0~+0.3mm；
3), once cold rolling: first time cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 7 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 0.9mm；
When first time cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 1.8%；Working roll
Hardness of roll body 95HSD, roughness 0.6um, total reduction are controlled 73%；Pass through six roller reversible cold rolling milling train of 1700mm single chassis
The AGC gauge automatic control for S7-400 Siemens PLC Program and FM458 the module control having the function of, realizes the chill steel of 50 steel
The thickness and precision of band reaches -0.01~+0.01mm；
4) it, primary annealing: is once annealed in 100 tons of perhydro bright cover type annealing stoves；
When annealing for the first time, 430 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stove setting 3h, in heat preservation platform temperature
It heats up at full speed before degree, heating rate is controlled according to 38 DEG C/h after temperature is greater than heat preservation platform temperature, guarantor when rising to 690 DEG C
Temperature keeps the temperature 11h, bored cover 3h after heat preservation；Pass through the external burners of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
Burning, makes the uniformity of temperature profile in heating mantles, to guarantee the uniformity of 50 steel cold-rolled strip physical properties；
5), secondary cold-rolling: second of cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 4 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 0.32mm；
When second of cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 2.9%；Working roll
Total reduction is controlled 64%；The S7-400 Siemens PLC Program that has by six roller reversible cold rolling milling train of 1700mm single chassis and
The AGC gauge automatic control function of FM458 module control, realize the thickness and precision of the chill steel band of 50 steel reach -0.005~+
0.005mm；
6), loose winding: loose winding is carried out using four sections of ladder tension of 1700mm rewinding unit；
When loose winding, 1700mm rewinding unit is by coil of strip again online uncoiling and batches, first stage tension when loose winding be 22kN,
Second stage tension is 16kN, phase III tension is 12kN, fourth stage tension is 8kN, to prevent coil of strip from moving back in annealing furnace
Bonding defect is generated when fiery,；The speed of service is controlled in 330m/min, and the uncoiler CPC by 1700mm rewinding unit is automatically right
Middle control function makes steel band be directed at unit centre line always, by the EPC Edge position control following function of 1700mm rewinding unit,
Solve the problems, such as coil of strip staggered floor and tower-shaped defect；
7), double annealing: double annealing is carried out in 100 tons of perhydro bright cover type annealing stoves；
When second of annealing, 460 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stoves setting 3h, in heat preservation platform temperature
It heats up at full speed before degree, heating rate is controlled according to 39 DEG C/h after temperature is greater than heat preservation platform temperature, guarantor when rising to 650 DEG C
Temperature keeps the temperature 11h, bored cover 3h after heat preservation；Pass through the external burners of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
Burning, makes the uniformity of temperature profile in heating mantles, to ensure that the uniformity of 50 steel cold-rolled strip physical properties；
8), smooth: to be carried out using 1700mm single stand four-roller planisher smooth；
When smooth, the uncoiling tension of 1700mm single stand four-roller planisher is 23kN, and machine forward pull is 8kN, and machine backward pull is
8kN, coiling tension 32kN, skin pass rolling power are 2900kN；Pressure and position by 1700mm single stand four-roller planisher
The APC automatic control function of closed loop realizes the accurate control of elongation percentage, and it is small to reach amounts of thickness variation in every meter of length range of product
Strength Changes amount is less than 1% in 0.3%, every meter of length range；Working roll by 1700mm single stand four-roller planisher is positive and negative
Hydraulic bending roll and the unilateral bias adjusting function of pressure, guarantee the shape wave height 2mm of product；The work of 1700mm single stand four-roller planisher
Roller is the working roll after texturing that roughness is 1.8 μm, and the surface roughness of 50 steel cold-rolled strips is made to reach 0.9 μm；
9), oiling is put in storage: being packed and stored after carrying out oiling using 1700mm rewinding unit, tape measure 50 steel of high-precision ultra-wide is made
Cold-rolled strip；
When oiling, opens a book on 1700mm rewinding unit, pass through the high-voltage electrostatic field of electrostatic oiler in uncoiling, coiling process
Effect and marginal discharge function, the oil liquid of the antirust oil flowed out from knife beam cutting edge radius is atomized rapidly, and be adsorbed in 50 steel
The upper and lower surfaces of cold-rolled strip form equally distributed oil film, when oiling, the operating voltage control of electrostatic oiler in 60kV,
Fuel-flow control is applied in 0.5g/m2, so that solving the problems, such as that holiday, oiling are uneven, apply oil mass cannot accurately control.
Through detecting, produced tape measure 50 steel cold-rolled strip of high-precision ultra-wide with a thickness of 0.32mm, width 1360mm,
Its thickness deviation: -0.005~+0.005mm, width difference: 0~+0.5mm, dimensional accuracy is high, and shape wave height is 2mm, plate shape
Straight, surface uniformity, plate face bubble-free is mingled with, the defects of striped, color difference, side are split, and roughness reaches 0.9 μm of m, tension
Intensity reaches 490MPa, has reached the quality requirement of 50 steel cold-rolled strip of tape measure high-precision ultra-wide.
Embodiment 3:
In our company, produce with a thickness of 0.35mm, the 50 steel cold-rolled strip of tape measure high-precision ultra-wide that width is 1500mm.
A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it is with a thickness of 0.35mm, width
1500mm；It is made of 50 steel hot rolled strips, the chemical component (wt%) of used 50 steel hot rolled strip are as follows: C:0.55%,
Si:0.25%, Mn:0.50%, P:0.025%, S:0.015%, Cr:0.16%, Ni:0.30%, Cu:0.25%, Als:0.01%, remaining
For Fe and inevitable impurity.
The production method of above-mentioned a kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it includes following
Step is completed:
1) 50 steel hot rolled strips, are produced: after the desulfurizing iron produced, being connected through converter smelting, the refining of LF furnace, slab caster
Casting, heating and tandem mill hot rolling control its chemical component (wt%) satisfaction: C:0.55%, Si:0.25%, Mn:0.50%, P:
0.025%, S:0.015%, Cr:0.16%, Ni:0.30%, Cu:0.25%, Als:0.01%, remaining for Fe and inevitably it is miscellaneous
Matter is made with a thickness of 3.5mm, the 50 steel hot rolled strips that width is 1510mm；
LF furnace refining time: 30min, soft argon blowing time: 10min；When tandem mill hot rolling, steel slab hot sending, slab, which enters, to be added
At 400 DEG C, slow cooling after coil of strip is offline, soaking section temperature is controlled at 1280 DEG C for temperature control before hot stove heating；Finish rolling finish to gauge temperature
Degree control is at 850 DEG C, and oiler temperature control is at 690 DEG C；The shim values of 50 steel hot rolled strips: 0.03mm, strip crown value 0.05mm；
2) pickling and trimming, pickling trimming: are carried out to 50 steel hot rolled strips using the plug-type chlorohydric acid pickling unit of 1580mm；
When pickling, 3% corrosion-retarding fog inhibitor is added, in the 6# acid tank of the plug-type chlorohydric acid pickling unit of 1580mm to improve 50 steel
The finish of pickling steel band plate face；Trimming is carried out using two edge of the circle shear to 50 steel pickling steel bands, lap control when matching knife
System is in 0.15mm, and side clearance control is in 0.38mm, to avoid occurring raw edges disconnected band accident during next procedure cold rolling,
The width of steel band makes the width of 50 steel pickling steel bands by circle shear opening degree width automatic regulating function for 1500mm after trimming
Degree precision reaches 0~+0.2mm；
3), once cold rolling: first time cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 6 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 1.0mm；
When first time cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 1.5%；Working roll
Hardness of roll body 93HSD, roughness 0.5um, total reduction are controlled 71%；Pass through six roller reversible cold rolling milling train of 1700mm single chassis
The AGC gauge automatic control for S7-400 Siemens PLC Program and FM458 the module control having the function of, realizes the chill steel of 50 steel
The thickness and precision of band reaches -0.01~+0.01mm；
4) it, primary annealing: is once annealed in 100 tons of perhydro bright cover type annealing stoves；
In step 4), when annealing for the first time, 450 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stove setting 2h is being protected
It heats up at full speed before warm platform temperature, heating rate is controlled according to 40 DEG C/h after temperature is greater than heat preservation platform temperature, is risen to
It is kept the temperature at 700 DEG C, keeps the temperature 10h, bored cover 2h after heat preservation；Pass through the outer of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
The burning for setting formula burner makes the uniformity of temperature profile in heating mantles, to guarantee the uniformity of 50 steel cold-rolled strip physical properties；
5), secondary cold-rolling: second of cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 3 rolling passes
It is rolled to the chill steel band of 50 steel with a thickness of 0.35mm；
When second of cold rolling, the concentration of emulsion used of six roller reversible cold rolling milling train of 1700mm single chassis is controlled 2.5%；Working roll
Total reduction is controlled 65%；The S7-400 Siemens PLC Program that has by six roller reversible cold rolling milling train of 1700mm single chassis and
The AGC gauge automatic control function of FM458 module control, realize the thickness and precision of the chill steel band of 50 steel reach -0.005~+
0.005mm；
6), loose winding: loose winding is carried out using four sections of ladder tension of 1700mm rewinding unit；
When loose winding, 1700mm rewinding unit is by coil of strip again online uncoiling and batches, first stage tension when loose winding be 23kN,
Second stage tension is 17 kN, phase III tension is 13kN, fourth stage tension is 9kN, to prevent coil of strip from moving back in annealing furnace
Bonding defect is generated when fiery,；The speed of service is controlled in 350m/min, and the uncoiler CPC by 1700mm rewinding unit is automatically right
Middle control function makes steel band be directed at unit centre line always, by the EPC Edge position control following function of 1700mm rewinding unit,
Solve the problems, such as coil of strip staggered floor and tower-shaped defect；
7), double annealing: double annealing is carried out in 100 tons of perhydro bright cover type annealing stoves；
When second of annealing, 470 DEG C of the heat preservation platform of 100 tons of perhydro bright cover type annealing stoves setting 2h, in heat preservation platform temperature
It heats up at full speed before degree, heating rate is controlled according to 40 DEG C/h after temperature is greater than heat preservation platform temperature, guarantor when rising to 660 DEG C
Temperature keeps the temperature 10h, bored cover 2h after heat preservation；Pass through the external burners of the heating mantles of 100 tons of perhydro bright cover type annealing stoves
Burning, makes the uniformity of temperature profile in heating mantles, thus the uniformity for the 50 steel cold-rolled strip physical properties that ensure that；
8), smooth: to be carried out using 1700mm single stand four-roller planisher smooth；
When smooth, the uncoiling tension of 1700mm single stand four-roller planisher is 25kN, and machine forward pull is 9kN, and machine backward pull is
9kN, coiling tension 35kN, skin pass rolling power are 3000kN；Pressure and position by 1700mm single stand four-roller planisher
The APC automatic control function of closed loop realizes the accurate control of elongation percentage, and it is small to reach amounts of thickness variation in every meter of length range of product
Strength Changes amount is less than 1% in 0.3%, every meter of length range；Working roll by 1700mm single stand four-roller planisher is positive and negative
Hydraulic bending roll and the unilateral bias adjusting function of pressure guarantee that the shape wave height of product is 1mm；The work of 1700mm single stand four-roller planisher
It is the working roll after texturing that roughness is 2.0 μm as roller, the surface roughness of 50 steel cold-rolled strips is made to reach 1.0 μm；
9), oiling is put in storage: being packed and stored after carrying out oiling using 1700mm rewinding unit, tape measure 50 steel of high-precision ultra-wide is made
Cold-rolled strip.
When oiling, open a book on 1700mm rewinding unit, it is quiet by the high pressure of electrostatic oiler in uncoiling, coiling process
The oil liquid of the antirust oil flowed out from knife beam cutting edge radius is atomized rapidly, and is adsorbed in by the effect of electric field and marginal discharge function
The upper and lower surfaces of the 50 steel cold-rolled strips of 0.35mm form equally distributed oil film, when oiling, the work electricity of electrostatic oiler
Voltage-controlled system applies fuel-flow control in 0.3g/m in 40kV2, so that is solved that holiday, oiling is uneven, applies oil mass and cannot accurately control asks
Topic.
Through detecting, produced tape measure 50 steel cold-rolled strip of high-precision ultra-wide with a thickness of 0.35mm, width 1500mm,
Its thickness deviation: -0.005~+0.005mm, width difference: 0~+0.2mm, dimensional accuracy is high, shape wave height 1mm, and plate shape is flat
Directly, surface uniformity, plate face bubble-free are mingled with, the defects of striped, color difference, side are split, and roughness reaches 1.0 μm of m, and tension is strong
Degree reaches 470MPa, has reached the quality requirement of 50 steel cold-rolled strip of tape measure high-precision ultra-wide.
Claims (10)
1. a kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it is with a thickness of 0.30~0.35mm, width
1250~1500mm；It is made of 50 steel hot rolled strips, the chemical component (wt%) of used 50 steel hot rolled strip are as follows: C:
(0.5~0.55) %, Si:(0.2~0.25) %, Mn:(0.50~0.70) %, P:(0.010~0.025) %, S:(0.005~
0.015) %, Cr:(0.13~0.16) %, Ni:(0.20~0.30) %, Cu:(0.20~0.25) %, Als:(0.01~
0.015) %, remaining is Fe and inevitable impurity.
2. a kind of tape measure production method of 50 steel cold-rolled strip of high-precision ultra-wide, it is characterised in that: it has included the following steps
At:
1) 50 steel hot rolled strips, are produced: after the desulfurizing iron produced, being connected through converter smelting, the refining of LF furnace, slab caster
Casting, heating and tandem mill hot rolling control its chemical component (wt%) satisfaction: C:(0.5~0.55) %, Si:(0.2~0.25) %,
Mn:(0.50~0.70) %, P:(0.010~0.025) %, S:(0.005~0.015) %, Cr:(0.13~0.16) %, Ni:
(0.20~0.30) %, Cu:(0.20~0.25) %, Als:(0.01~0.015) %, remaining is Fe and inevitable impurity, system
It obtains with a thickness of 3.25~3.5mm, the 50 steel hot rolled strips that width is 1260~1510mm；
2) pickling and trimming, pickling trimming: are carried out to 50 steel hot rolled strips using the plug-type chlorohydric acid pickling unit of 1580mm；
3), once cold rolling: first time cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 6~8 rolling roads
The secondary chill steel band of 50 steel being rolled to a thickness of 0.8~1.0mm；
4) it, primary annealing: is once annealed in 100 tons of perhydro bright cover type annealing stoves；
5), secondary cold-rolling: second of cold rolling is carried out using six roller reversible cold rolling milling train of 1700mm single chassis, through 3~5 rolling roads
The secondary chill steel band of 50 steel being rolled to a thickness of 0.30~0.35mm；
6), loose winding: loose winding is carried out using four sections of ladder tension of 1700mm rewinding unit；
7), double annealing: double annealing is carried out in 100 tons of perhydro bright cover type annealing stoves；
8), smooth: to be carried out using 1700mm single stand four-roller planisher smooth；
9), oiling is put in storage: being packed and stored after carrying out oiling using 1700mm rewinding unit, tape measure 50 steel of high-precision ultra-wide is made
Cold-rolled strip.
3. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 1), LF furnace refining time: 30~40min, soft argon blowing time: 10~15 min；When tandem mill hot rolling, slab heat
Dress hot sending, temperature control is at 400 DEG C~430 DEG C before slab enters heating stove heating, slow cooling after coil of strip is offline, soaking section temperature
Control is at 1300 DEG C ± 20 DEG C；Finish rolling finishing temperature is controlled at 870 DEG C ± 20 DEG C, and oiler temperature control is at 670 DEG C ± 20 DEG C；
The shim values of 50 steel hot rolled strips: 0~0.03mm, 0.03~0.05mm of strip crown value.
4. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 2, when pickling, 1%~3% slow corrosion inhibiting fog is added in the 6# acid tank of the plug-type chlorohydric acid pickling unit of 1580mm
Agent；Trimming is carried out using two edge of the circle shear to 50 steel pickling steel bands, lap control is in 0.15~0.20mm, side when matching knife
The width of gap control steel band after 0.36~0.38mm, trimming is 1250~1500mm.
5. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 3), when first time cold rolling, the concentration of emulsion used control of six roller reversible cold rolling milling train of 1700mm single chassis 1.5~
2.0%；93~97HSD of hardness of roll body, the 0.5~0.7um of roughness of working roll, total reduction are controlled 71~75%.
6. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 4), when annealing for the first time, 420 DEG C~450 DEG C of the heat preservation of 2~4h is arranged in 100 tons of perhydro bright cover type annealing stoves
Platform heats up at full speed before keeping the temperature platform temperature, temperature be greater than heat preservation platform temperature after heating rate according to 35 DEG C~40 DEG C/
H is controlled, heat preservation when rising to 680 DEG C~700 DEG C, keeps the temperature 10~12h, 2~4h of bored cover after heat preservation.
7. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 5), when second of cold rolling, the concentration of emulsion used control of six roller reversible cold rolling milling train of 1700mm single chassis 2.5~
3.0%；The total reduction of working roll is controlled 62.5~65%.
8. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 6), when loose winding, 1700mm rewinding unit is by coil of strip again online uncoiling and batches, the first stage when loose winding
Power is 20~23kN, second stage tension is 15~17 kN, phase III tension is 11~13kN, fourth stage tension be 7~
9kN；The speed of service is controlled in 300~350m/min.
9. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 7), when annealing for the second time, 450 DEG C~470 DEG C of the heat preservation of 2~4h is arranged in 100 tons of perhydro bright cover type annealing stoves
Platform heats up at full speed before keeping the temperature platform temperature, temperature be greater than heat preservation platform temperature after heating rate according to 35 DEG C~40 DEG C/
H is controlled, heat preservation when rising to 640 DEG C~660 DEG C, keeps the temperature 10~12h, 2~4h of bored cover after heat preservation.
10. a kind of tape measure according to claim 2 production method of 50 steel cold-rolled strip of high-precision ultra-wide, feature exist
In: in step 8), when smooth, the uncoiling tension of 1700mm single stand four-roller planisher is 20~25kN, machine forward pull is 7~
9kN, machine backward pull are 7~9kN, and coiling tension is 30~35kN, and skin pass rolling power is 2800~3000kN；
In step 9), when oiling, the operating voltage control of electrostatic oiler applies fuel-flow control in 0.3~0.6g/ in 40~70kV
m2。
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| CN113399456A (en) * | 2021-06-30 | 2021-09-17 | 新余钢铁股份有限公司 | Ultrathin 65Mn cold-rolled wide steel strip and manufacturing method thereof |
| CN113399456B (en) * | 2021-06-30 | 2023-04-25 | 新余钢铁股份有限公司 | Ultrathin 65Mn cold-rolled wide steel strip and manufacturing method thereof |
| CN113578962A (en) * | 2021-07-23 | 2021-11-02 | 安徽楚江特钢有限公司 | Production method of ultrathin cold-rolled steel strip for clothing |
| CN113578962B (en) * | 2021-07-23 | 2023-08-04 | 安徽楚江特钢有限公司 | Production method of ultrathin cold-rolled steel strip for clothes |
| CN115090692A (en) * | 2022-06-27 | 2022-09-23 | 江苏沙钢集团有限公司 | Method for controlling single-side waves of cold-rolled annealed plate |
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