CN105925891A - Hot-rolled pickled steel with tensile strength of 310MPa grade and used for high-surface quality automobiles, and production method thereof - Google Patents
Hot-rolled pickled steel with tensile strength of 310MPa grade and used for high-surface quality automobiles, and production method thereof Download PDFInfo
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- CN105925891A CN105925891A CN201610557286.2A CN201610557286A CN105925891A CN 105925891 A CN105925891 A CN 105925891A CN 201610557286 A CN201610557286 A CN 201610557286A CN 105925891 A CN105925891 A CN 105925891A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
Abstract
Hot-rolled pickled steel with the tensile strength of 310MPa grade and used for high-surface quality automobiles comprises 0.012-0.060wt% of C, 0.10wt% or less of Si, 0.200-0.400wt% of Mn, 0.025wt% or less of P, 0.010wt% or less of S and 0.015-0.055wt% of Als. A production method of the hot-rolled pickled steel comprises the following steps: routinely smelting above components, and continuously casting the smelted components to form a blank; heating the cast blank; carrying out hot rolling on the heated blank; reeling the hot-rolled blank; carrying out laminar cooling; and pickling the cooled blank. Surplus power of a cold rolling and pickling combination production line is used to produce the hot-rolled pickled steel for automobiles, the last frame of five frames is used to control the surface roughness of pickled steel to make the surface roughness of the above product be 0.8-2.0[mu]m, the hot-rolled pickled steel has good ductility, cold stamping moldability, weldability and cold bending property, chemical components and mechanical performances of steel plates are stable, the production cost of ton steel is not lower than 15%, and high standard manufacturing requirements of the hot-rolled pickled steel for automobiles are completely met.
Description
Technical field
The present invention relates to a kind of Automobile Plate and production method thereof, specifically belonging to a kind of tensile strength is the high table of 310MPa level
Face quality automobile hot rolling acid-cleaning steel and production method.
Background technology
Along with the continuous aggravation that steel and iron industry production capacity entirety is superfluous, low cost manufactures product increasingly by steel industry
Pay attention to；And on the other hand auto industry is developing rapidly, the demand of automobile steel is increasing, and the competition of industry is the most increasingly
Fierceness, therefore the control to material cost is most important.Steel and iron industry and the current situation of auto industry, further promote
The automobile application of hot rolling acid-cleaning steel and development.
Automobile with hot rolling acid-cleaning steel thickness typically in the scope of 2.0 ~ 6.0 mm, it is desirable to great surface quality, in order to meet vapour
The car strict standard to ferrous materials, it is desirable to must not have bubble, crackle on the surface of strip steel, scab, fold and be mingled with etc. making
By harmful defect, also must not have more than the defect affecting strip steel forming property partly of belt steel thickness tolerance, such as scratch, press
The defects such as trace, pit, roll marks.Automobile hot rolling acid-cleaning steel primary crossbeam in chassis system, auxiliary girder, front in passenger car
Bridge, back axle；Wheel hub in wheel system, spoke；Structural member in bodywork system and safety member；Force structure in seat system
Part and safety member, one passenger car pickling steel consumption about 100kg of total.And at the bottom of the driver's cabin safeguard construction part of commercial car, compartment
Plates etc. all use hot rolling acid-cleaning Steel material, amount to a commercial car pickling steel consumption about 16kg.
The feature of automobile hot rolling acid-cleaning steel is as follows: compared with plate general with hot rolling, and automobile hot rolling acid-cleaning steel has following
Advantage: one is great surface quality, because eliminating the iron scale of belt steel surface, strip surface quality is improved, and improves
The welding performance of material and paintability, and significantly improve the appearance of strip steel, it is preferable automobile structure material；Two
Being high dimensional accuracy, after the flattened technique of automobile hot rolling acid-cleaning steel, its template is optimized, thus decreases strip profile and flatness
The defect of difference.Compared with cold rolling plate, on the premise of ensureing that strip surface quality uses requirement, automobile hot rolling acid-cleaning steel
" with hot Dai Leng " can reduce production cost for steel mill, reduce purchase cost for user.
At home and abroad some large iron and steel enterprise has the continuous way hot rolling acid-cleaning steel production line of specialty, and some iron and steel is looked forward to
Industry only has plug-type hot rolling acid-cleaning steel production line；Also have does not has hot rolling acid-cleaning steel production line, production hot rolling acid of can only entrusting outward
Wash steel.It is guaranteed that continuous way hot rolling acid-cleaning steel production line produces automobile hot rolling acid-cleaning steel quality, but equipment investment cost is too
High；Although plug-type hot rolling acid-cleaning steel production line produces hot rolling acid-cleaning steel cost with outer committee and reduces, quality can not get ensureing,
Especially produce and have the automobile hot rolling acid-cleaning steel of great surface quality requirement.Instant invention overcomes these not enough, utilize cold rolling acid
The production capacity more than needed rolling on-line production line produces automobile hot rolling acid-cleaning steel, and the high surface both having met automobile hot rolling acid-cleaning steel is wanted
Ask, also create economic benefit
Through preliminary search, Chinese Patent Application No. is the document of 201210298259.X, discloses a kind of thickness≤1.8mm vapour
The production method of automobile-used Thin Specs hot rolling acid-cleaning steel, it uses Thin Specs CSP technique to produce, the chemical composition of steel percentage by weight
Number content is: C0.04 ~ 0.07%, Si0.10 ~ 0.30%, Mn0.60 ~ 1.30%, P≤0.025%, S≤0.012%, Ti0.02 ~
0.04%, Als0.010 ~ 0.030%；Sheet billet produces thickness≤1.8mm.Tensile strength >=400MPa.Production stage: molten iron takes off
Sulfur, stove are smelted and Alloying Treatment；Ladle furnace processes；Continuous casting and rolling；Water under high pressure dephosphorization, Stress control is at 25 ~ 35MPa；Control
Rolling, section cooling, batch, pickling, smooth, control smooth elongation percentage less than 2%；Finishing, uses Electrostatic greasing.It is deposited
Deficiency: due to CSP produce line, the compression ratio and the steel composition range that limit steel rolling are narrow, the steel plate of production
The more conventional hot steel rolling production of type, surface quality, mechanical property is poor, it is impossible to meet great surface quality automobile hot rolling acid-cleaning steel
Requirement.
Chinese Patent Application No. is the document of 201310731354.9, discloses a kind of 380MPa level one side enamel high
Intensity deep-draw hot rolling acid-cleaning steel plate, its chemical composition mass percent is: Mn0.35-0.65%, Als0.015-0.045%,
Ti: 0.030-0.060%, S: 0.008-0.016%, C≤0.018%, Si≤0.05%, P≤0.020%, N≤
0.006%.Yield strength >=the 380MP of the steel of example steel, elongation percentage more than 35%, the present invention coordinates controlled rolling and controls cold
But the enamelware that the enamel that technology produces makes through wet method or electrostatic one side enamel technology is quick-fried without squama, and adhesion property is good,
Meet 20,000 times 1～9bar circulating chilled water hydraulic pressure fatigue tests.Its deficiency existed: this steel production cost is higher, and Ti content is relatively
Greatly, the mechanical property of steel plate is the lowest, belongs to the production category of glassed steel, it is impossible to replace great surface quality automobile hot rolling acid-cleaning steel
Use.
Summary of the invention
The invention reside in the deficiency overcoming prior art to exist, it is provided that a kind of before ensureing armor plate strength and serviceability
Putting, steel surface roughness is in 0.8 ~ 2.0 μm, and production cost reduces, and to be not less than the tensile strength of 15% be that 310MPa level is high
Surface quality automobile hot rolling acid-cleaning steel and production method.
Realize the technical measures of above-mentioned purpose:
Tensile strength is 310MPa level great surface quality automobile hot rolling acid-cleaning steel, and its component and weight percent content be: C:
0.012～0.060%, Si≤0.10%, Mn:0.200～0.400%, P≤0.025%, S≤0.010%, Als:0.015～
0.055%, remaining is ferrum and inevitable impurity.
It is: the percentage by weight of C is 0.012～0.030%.
It is: the percentage by weight of Als is 0.048～0.055%.
Produce the tensile strength 310MPa level great surface quality automobile method of hot rolling acid-cleaning steel, its step:
1) routine is smelted and is casting continuously to form base；
2) heating strand, heating-up temperature is 1280 ~ 1320 DEG C；
3) carrying out hot rolling, and control roughing outlet temperature at 1060 ~ 1120 DEG C, finish rolling finishing temperature is at 860 ~ 900 DEG C；
4) batch, control coiling temperature at 600 ~ 650 DEG C；
5) section cooling is carried out, segmentation cooling before using, and control rate of cooling and be not less than 20 DEG C/s；
6) acid cleaning process is carried out:
A, carry out uncoiling and align；
B, taking elongation control pattern to carry out straightening, elongation control is 0.5～1.5%；
Use three descaling bath acid to roll and online carry out pickling, wherein require: 1# descaling bath: total acid concentration is 160～180g/L
Pickle, Fe concentration at 110～130g/L pickles, the concentration of free acid at 30～50g/L pickles, pickling temperature 70～
85℃；2# descaling bath: total acid concentration at 160～180g/L pickles, Fe concentration at 80～100g/L pickles, free acid
Concentration is at 80～100g/L pickles, and pickling temperature is at 70～85 DEG C；3# descaling bath: total acid concentration is in 160～180g/L acid
Washing liquid, Fe concentration is at 30～50g/L pickles, and the concentration of free acid is at 140～160g/L pickles, and pickling temperature is 70～85
℃；Corrosion inhibiter is added according to 10～12g/L pickles in each descaling bath；And control total pickling time less than 18 seconds；
C, rinsing, potcher uses level Four ladder-type cell body, and rinses by the mode of adverse current hydro-peening, and controls rinsing section
PH value be not less than 4.0, electrical conductivity be less than 65 μ s/cm: and in potcher according to 10～12g/L pickles add inhibitions
Agent；
D, dry, utilize compressed air will accumulate in the residual liquid outer side-blown brush to steel band on steel band both sides, and control to be dried
Temperature is at 110～130 DEG C；
E, carrying out cold rolling levelling, smooth rate is set to 1.0～3.0%, and leveling roll Ra is 2.5 μm；And make calibrator whole process input make
With；
F, carry out conventional Electrostatic greasing.
Each element and the effect of main technique and mechanism in the present invention
Carbon: carbon is intensified element most economical in mild steel, but too high levels reduces plasticity and the impact flexibility of steel, dislikes
Change cold formability and welding performance.The increase of carbon equivalent also makes the qualification rate of the cold-bending property of steel plate reduce.It is thus desirable to protecting
On the premise of card intensity, the content reducing carbon as far as possible.So, according to actual needs its content is limited to 0.012～
The scope of 0.060%.
Silicon: silicon is cheap and effective deoxygenation of liquid steel element.But its content is more than 0.300%, then can deteriorate hot rolled steel plate
Surface quality, and then affect the surface quality of pickling steel, particularly disadvantageous for great surface quality automobile hot rolling acid-cleaning steel.Institute
With, its content is limited to less than 0.100% scope.
Manganese: manganese is to improve intensity and the maximally effective element of toughness, and manganese can expand austenitic area, can improve the intensity of steel-
Extend balance.But the ductility of steel and impact property can be produced serious influence by too high Mn content.In consideration of it, by it
On be defined to 0.50%, so, its content is limited to 0.200～0.400% scope.
Phosphorus: phosphorus is the element of the intensity that can improve steel, but it is reduction of the plasticity of steel, also unfavorable to welding performance, and
Increase the sensitivity of weld cracking, therefore, be a kind of harmful element in automobile hot rolling acid-cleaning steel, phosphorus should be reduced as far as possible
Content in steel.And phosphorus easily causes center segregation of casting blank, cause cold bending performance, toughness to deteriorate, therefore, set it
Upper content limit is 0.025%.
Sulfur: sulfur is very harmful element.Sulfur in steel mainly presented in (Mn, Fe) S is mingled with in steel, this
Sulphide inculsion is the most disadvantageous to the impact flexibility of steel, cold-bending property, plasticity etc., and causes each to different of plate property
Property, therefore, need to sulfur content in steel be controlled the lowest more good.Based on the consideration to steel plate cold bending forming technology and manufacturing cost,
Plan sulfur content in steel to control below 0.010%.
Aluminum: aluminum adds for deoxidation, when Als content is less than 0.010%, it is impossible to play its effect；The opposing party
Face, aluminum affects the welding performance of steel, and the aluminum adding volume easily forms aluminium oxide agglomerate, so, it is stipulated that the Als upper limit is
0.050%.Therefore, Als content is limited to 0.015～0.055% scope.
In the present invention, pickling and flattening process are exactly to utilize acid in the case of not having hot rolling continuous pickling production line
Roll online production capacity more than needed to carry out.The most effectively make use of capacity of equipment, add economic benefit.Whole pickling steel is in acid
The operation rolling online production is: uncoiling → aligning → cutting head cutting tail → welding → straightening → pickling (adding corrosion inhibiter) → rinsing (adds
Corrosion inhibiter) → drying → cutting edge → smooth → batch → finishing → oiling → pickling finished product.
In the present invention, in pickling and potcher, why add corrosion inhibiter, it is therefore intended that prevent strip steel in acid solution and
In rinsing, the time of staying is long and produce overpickling situation, thus obtains the hot rolling acid-cleaning steel band of excellent surface quality, to meet
Constantly require the growth requirement of high-quality auto industry.
The present invention compared with prior art, its have good ductility, cold stamping forming property, welding performance and
Cold-bending property is good, and the chemical composition of steel plate and stable mechanical performance, and cold stamping forming property is good, and has high surface matter
Amount, is fully able to meet the high standard manufacture requirements of automobile hot rolling acid-cleaning steel.
Accompanying drawing explanation
Accompanying drawing 1 is the metallurgical structure figure of the present invention.
Detailed description of the invention
Below the present invention is described in detail:
Table 1 is the component value list of various embodiments of the present invention and comparative example；
Table 2 be various embodiments of the present invention and comparative example pickling before main technologic parameters value list；
Table 3 is various embodiments of the present invention and the pickling of comparative example and rinsing process parameter value list；
Table 4 is various embodiments of the present invention and comparative example performance test results list.
Various embodiments of the present invention all produce according to following steps:
1) routine is smelted and is casting continuously to form base；
2) heating strand, heating-up temperature is 1280 ~ 1320 DEG C；
3) carrying out hot rolling, and control roughing outlet temperature at 1060 ~ 1120 DEG C, finish rolling finishing temperature is at 860 ~ 900 DEG C；
4) batch, control coiling temperature at 600 ~ 650 DEG C；
5) section cooling is carried out, segmentation cooling before using, and control rate of cooling and be not less than 20 DEG C/s；
6) acid cleaning process is carried out:
A, carry out uncoiling and align；
B, taking elongation control pattern to carry out straightening, elongation control is 0.5～1.5%；
Use three descaling bath acid to roll and online carry out pickling, wherein require: 1# descaling bath: total acid concentration is 160～180g/L
Pickle, Fe concentration at 110～130g/L pickles, the concentration of free acid at 30～50g/L pickles, pickling temperature 70～
85℃；2# descaling bath: total acid concentration at 160～180g/L pickles, Fe concentration at 80～100g/L pickles, free acid
Concentration is at 80～100g/L pickles, and pickling temperature is at 70～85 DEG C；3# descaling bath: total acid concentration is in 160～180g/L acid
Washing liquid, Fe concentration is at 30～50g/L pickles, and the concentration of free acid is at 140～160g/L pickles, and pickling temperature is 70～85
℃；Corrosion inhibiter is added according to 10～12g/L pickles in each descaling bath；And control total pickling time less than 18 seconds；
C, rinsing, potcher uses level Four ladder-type cell body, and rinses by the mode of adverse current hydro-peening, and controls rinsing section
PH value be not less than 4.0, electrical conductivity be less than 65 μ s/cm: and in potcher according to 10～12g/L pickles add inhibitions
Agent；
D, dry, utilize compressed air will accumulate in the residual liquid outer side-blown brush to steel band on steel band both sides, and control to be dried
Temperature is at 110～130 DEG C；
E, carrying out cold rolling levelling, smooth rate is set to 1.0～3.0%, and leveling roll Ra is 2.5 μm；And make calibrator whole process input make
With；
F, carry out conventional Electrostatic greasing.
Value not one-to-one relationship in table 1, table 2 and table 3.
Chemical composition value list (wt.%) of table 1 various embodiments of the present invention and comparative example steel
Main technologic parameters value list before the pickling of table 2 various embodiments of the present invention and comparative example
Table 3 various embodiments of the present invention and the pickling of comparative example and rinsing, Hot Air Dying Technology Parameters value list
Note: in table 3, l is every liter of pickle；Rinsing medium is condensed water or desalted water；Dry and use compressed air.
The performance test results list of table 4 various embodiments of the present invention and comparative example product
Can know from table 4, steel of the present invention is owing to having good comprehensive mechanical property, it is possible to substitute the cold rolling product of same level
Product, extensively apply on automobile, thus reduce automobile making cost, increase the benefit.According to statistics, the rate of cost reduction averagely exists
15.3%。
This detailed description of the invention is only and most preferably enumerates, the not restricted enforcement to technical solution of the present invention.
Claims (4)
1. tensile strength is 310MPa level great surface quality automobile hot rolling acid-cleaning steel, and its component and weight percent content be:
C:0.012～0.060%, Si≤0.10%, Mn:0.200～0.400%, P≤0.025%, S≤0.010%, Als:0.015～
0.055%, remaining is ferrum and inevitable impurity.
2. tensile strength as claimed in claim 1 is 310MPa level great surface quality automobile hot rolling acid-cleaning steel, and its feature exists
In: the percentage by weight of C is 0.012～0.030%.
3. tensile strength as claimed in claim 1 is 310MPa level great surface quality automobile hot rolling acid-cleaning steel, and its feature exists
In: the percentage by weight of Als is 0.048～0.055%.
4. produce the side that tensile strength as claimed in claim 1 is 310MPa level great surface quality automobile hot rolling acid-cleaning steel
Method, its step:
1) routine is smelted and is casting continuously to form base；
2) heating strand, heating-up temperature is 1280 ~ 1320 DEG C；
3) carrying out hot rolling, and control roughing outlet temperature at 1060 ~ 1120 DEG C, finish rolling finishing temperature is at 860 ~ 900 DEG C；
4) batch, control coiling temperature at 600 ~ 650 DEG C；
5) section cooling is carried out, segmentation cooling before using, and control rate of cooling and be not less than 20 DEG C/s；
6) acid cleaning process is carried out:
A, carry out uncoiling and align；
B, taking elongation control pattern to carry out straightening, elongation control is 0.5～1.5%；
Use three descaling bath acid to roll and online carry out pickling, wherein require: 1# descaling bath: total acid concentration is 160～180g/L
Pickle, Fe concentration at 110～130g/L pickles, the concentration of free acid at 30～50g/L pickles, pickling temperature 70～
85℃；2# descaling bath: total acid concentration at 160～180g/L pickles, Fe concentration at 80～100g/L pickles, free acid
Concentration is at 80～100g/L pickles, and pickling temperature is at 70～85 DEG C；3# descaling bath: total acid concentration is in 160～180g/L acid
Washing liquid, Fe concentration is at 30～50g/L pickles, and the concentration of free acid is at 140～160g/L pickles, and pickling temperature is 70～85
℃；Corrosion inhibiter is added according to 10～12g/L pickles in each descaling bath；And control total pickling time less than 18 seconds；
C, rinsing, potcher uses level Four ladder-type cell body, and rinses by the mode of adverse current hydro-peening, and controls rinsing section
PH value be not less than 4.0, electrical conductivity be less than 65 μ s/cm: and in potcher according to 10～12g/L pickles add inhibitions
Agent；
D, dry, utilize compressed air will accumulate in the residual liquid outer side-blown brush to steel band on steel band both sides, and control to be dried
Temperature is at 110～130 DEG C；
E, carrying out cold rolling levelling, smooth rate is set to 1.0～3.0%, and leveling roll Ra is 2.5 μm；And make calibrator whole process input make
With；
F, carry out conventional Electrostatic greasing.
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Cited By (8)
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|---|---|---|---|---|
| CN106540993A (en) * | 2016-12-01 | 2017-03-29 | 浙江东南金属薄板有限公司 | Hot rolling acid-cleaning plate |
| CN111020385A (en) * | 2019-12-21 | 2020-04-17 | 河钢股份有限公司承德分公司 | Vanadium-containing hot-rolled pickled plate and pickling method thereof |
| CN111118510A (en) * | 2019-12-20 | 2020-05-08 | 唐山钢铁集团高强汽车板有限公司 | Manufacturing method of boron-containing pickled steel strip |
| CN112593143A (en) * | 2020-10-28 | 2021-04-02 | 邯郸钢铁集团有限责任公司 | 800 MPa-grade low-cost steel for pickling battery bracket and production method thereof |
| CN112658602A (en) * | 2020-12-04 | 2021-04-16 | 安阳钢铁股份有限公司 | Production method of cold-rolled weathering steel Q355GNH for boiler exchanger |
| CN113458163A (en) * | 2021-07-30 | 2021-10-01 | 日照钢铁控股集团有限公司 | Production process of thin-specification hot-rolled and pickled steel for automobile structure |
| CN113652695A (en) * | 2021-08-18 | 2021-11-16 | 马鞍山钢铁股份有限公司 | Production method for improving surface corrosion resistance of hot-rolled pickled steel plate |
| CN113755748A (en) * | 2021-08-18 | 2021-12-07 | 武汉钢铁有限公司 | Preparation method of hot-rolled pickled steel with high fatigue for automobile wheels |
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| CN113652695B (en) * | 2021-08-18 | 2022-11-25 | 马鞍山钢铁股份有限公司 | Production method for improving surface corrosion resistance of hot-rolled pickled steel plate |
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