CN102716905B - Method for producing cold-rolled sheet for surface coating and plating base plate - Google Patents
Method for producing cold-rolled sheet for surface coating and plating base plate Download PDFInfo
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Abstract
The invention discloses a method for producing a cold-rolled sheet for a surface coating and plating base plate. A steel billet comprises the following compositions by weight percentage: at most 0.12 percent of C, at most 0.05 percent of Si, at most 0.60 percent of Mn, at most 0.04 percent of P, at most 0.04 percent of S, and the balance of Fe. The steel billet comprising the compositions is sequentially subjected to hot rolling, acid washing and cold rolling to obtain a cold-rolled steel coil, and then the cold-rolled steel coil is made into the cold-rolled sheet for the surface coating and plating base plate through a continuous annealing or galvanizing method. Continuous annealing coating and plating bases plate and galvanizing coating and plating base plates produced through the method for producing the cold-rolled sheet for the surface coating and plating base plate have a good formability, meanwhile also have a good surface quality and paintability, and can be used as base plates of high-grade electric galvanized sheets, prepainted steel sheets, tinning sheets and aluminized steel sheets.
Description
Technical field
The present invention relates to metal material processing field, particularly the production method of flat cold-rolled sheet for a kind of Coating substrate
Background technology
Cold rolled coated plated substrate as electrogalvanizing, aluminize, the raw material of color coating, the product such as zinc-plated.Cold rolled coated plated substrate mainly contains to connect to move back and is coated with two kinds of plated substrate and zinc-plated painting plated substrates, connect move back be coated with plated substrate be generally used for electrogalvanizing, color coating, zinc-plated, aluminize etc., zinc-plated painting plated substrate is generally used for color coating.Because client is in the following process process of painting plated substrate, need to apply other metals of one deck or material at belt steel surface, if this coating is thicker, some defects on substrate can be covered, if this coating is thinner, in most cases some defects on substrate can be amplified.And actual situation mostly is the latter, most of client is in follow-up coating process, and all thinner (particularly electrogalvanizing) of overlay, therefore can amplify the defects such as the aberration of substrate surface, roll marks, scuffing, zinc flow liner.And client requires very high (especially for home appliance panel time) to the surface quality of final products, therefore to strictly control the surface quality of raw material substrate.And traditional cold rolled coated plated substrate cold rolling, connect move back, when zinc-plated, operation roll of mill, planisher working roll moves back in company, zinc-plated polishing machine working roll all adopts common Cr3 or Cr5 roller, surface quality is poor, be mainly to have the defects such as aberration, roll marks, scuffing, light and shade striped, zinc flow liner, cannot meet high-grade client's instructions for use.
Summary of the invention
Technical problem to be solved by this invention is to provide the production method that a kind of surface quality rank is high, Coating substrate that can meet high-end customer instructions for use is used flat cold-rolled sheet.
For solving the problems of the technologies described above, the invention provides the production method of a kind of Coating substrate flat cold-rolled sheet, comprise the steps:
1) steel-making makes steel billet;
2) steel billet is obtained to cold-rolled steel coils by hot rolling, pickling, cold rolling;
3) cold-rolled steel coils is moved back to production technology by company or zinc-plated production technology makes Coating substrate flat cold-rolled sheet, wherein, connect that to move back production technology be alkali cleaning, annealing and smooth; Zinc-plated production technology is alkali cleaning, annealing, zinc-plated and polishing;
It is as follows that described steel billet makes in the production technology of cold-rolled steel coils technical parameter control:
In hot rolling technology, tapping temperature is 1250 ± 30 DEG C, and roughing outlet temperature is 1100 ± 10 DEG C, and finishing temperature is 930 ± 20 DEG C, and coiling temperature is 730 ± 20 DEG C;
In acid cleaning process, 1# acid tank free acid concentration is controlled at 50～55g/L, 75～90 DEG C of pickling temperatures, pickling speed 140～200m/min;
In cold-rolling process, milling train 1,2,5 frame working rolls use chrome-plated roller, and operation roll of mill Roughness Surface on Control is that 1,2 frame roughness Ras are 0.7～0.8 μ m, and 3,4 frame roughness Ras are 0.6～0.7 μ m, and 5 frame roughness Ras are 3.0 μ m; Concentration of emulsion used is that 1～4 frame concentration of emulsion used is that 2.5～4.5%, 5 frame concentration of emulsion used are 0.5～1.5%; Cold rolling reduction ratio is controlled within the scope of 60-85%;
It is as follows that technical parameter control is moved back in production technology by described company:
In alkali washing process, 1# alkali immersion trough and scrub groove and 2# alkali immersion trough and the NaOH electrical conductivity of solution of scrubbing groove are controlled at 30000-50000us/cm, the NaOH electrical conductivity of solution of electrolytic cleaning tank is controlled at 50000-80000us/cm, and cleaning section brush roll uses more than 10;
Continuous annealing furnace heating-up temperature is 750～790 DEG C;
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value >=80, smooth elongation control is in 0.6～1.5% scope, within the roller phase is controlled at 150km;
In described zinc-plated production technology, technical parameter control is as follows:
In alkali washing process, alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 30000-50000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000-80000us/cm, and cleaning section brush roll uses more than 8;
750～790 DEG C of continuous annealing furnace heating-up temperatures, annealing time 40～100s;
In zincincation, 460 ± 5 DEG C of zinc liquid temperatures, before band steel enters zinc pot, temperature is controlled at 450～470 DEG C, zinc-plated time 5～20s, air knife winding-up N
2;
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value >=80, polishing elongation control is in 0.5～1.4% scope, and within the roller phase is controlled at 120km, process speed is controlled within the scope of 100～150m/min.
Further, described steel billet chemical composition mass percent is: C≤0.12%, and Si≤0.05%, Mn≤0.60%, P≤0.04%, S≤0.04%, surplus is Fe.
Further, described steel billet chemical composition mass percent is: C≤0.10%, and Si≤0.040%, Mn≤0.40%, P≤0.030%, S≤0.030%, surplus is Fe.
Further, described steel billet chemical composition mass percent is: C≤0.08%, and Si≤0.050%, Mn≤0.40%, P≤0.020%, S≤0.025%, surplus is Fe.
The production method of flat cold-rolled sheet for a kind of Coating substrate provided by the invention, the cold rolled coated plated substrate of producing, connect to move back to be coated with plated substrate or zinc-plated painting plated substrate no matter be, surface-brightening cleaning, more than surface quality all can reach FC level, in thering is excellent formability energy, also there is excellent surface quality and paintability, can be used as the substrate of high-grade electrolytic galvanized sheet, Coil Coating Products, tin plate, alclad sheet.
Brief description of the drawings
A kind of surface that Fig. 1 provides for the embodiment of the present invention 1 connects moves back the metallographic structure figure that is coated with plated substrate.
Detailed description of the invention
A kind of Coating substrate flat cold-rolled sheet provided by the invention, the chemical composition mass percent that steel-making obtains steel billet is: C≤0.12%, Si≤0.05%, Mn≤0.60%, P≤0.04%, S≤0.04%, surplus is Fe.According to the final use difference of product, as, punching press, deep-draw use for common punching press, steel billet composition can further be optimized for following three kinds, and specific chemical composition mass percent is as table 1 (surplus is Fe):
Table 1 Coating substrate steel billet chemical composition
| ? | C≤ | Si≤ | Mn≤ | P≤ | S≤ |
| Preferably 1 | 0.12 | 0.050 | 0.60 | 0.040 | 0.04 |
| Preferably 2 | 0.10 | 0.040 | 0.40 | 0.030 | 0.030 |
| Preferably 3 | 0.08 | 0.050 | 0.40 | 0.020 | 0.025 |
By the steel billet of above-mentioned chemical composition mass percent successively through hot rolling, pickling, obtain cold-rolled steel coils after cold rolling, when the company of production is while moving back Coating substrate, by gained cold-rolled steel coils again through alkali cleaning, continuous annealing, the smooth Coating substrate flat cold-rolled sheet that obtains; Be coated with when plated substrate when producing galvanizing surface, gained cold-rolled steel coils is obtained to Coating substrate flat cold-rolled sheet through alkali cleaning, continuous annealing, zinc-plated, polishing again.
Even move back painting plated substrate and zinc-plated coating substrate production method is identical on steel-making, hot rolling, pickling and cold-rolling process:
In hot-rolled step, heating-up temperature when hot rolling of steel billet is 1280 ± 20 DEG C, finishing temperature is 910 ± 20 DEG C, coiling temperature is 710 ± 20 DEG C, the control of hot rolled coil surface quality rank is 1～2 grade, start to control strip surface quality from source, to ensure that final cold rolled coated plated substrate reaches senior surface quality requirement.
In acid pickling step, 1# acid tank free acid is controlled at 50～55g/L, 75～90 DEG C of pickling temperatures, pickling speed 140～200m/min, by strict control acid strength, temperature and pickling speed, ensure the iron scale of belt steel surface, iron powder and other impurity to clean up, when production, keep pickling speed stable, avoid owing pickling and overpickling.
In cold rolling step, milling train 1,2,5 frame working rolls use chrome-plated roller; Operation roll of mill Roughness Surface on Control: 1,2 frame work roll surface roughness Ras are 0.7～0.8 μ m, 3,4 frame work roll surface roughness Ras are 0.6～0.7 μ m, 5 frame work roll surface roughness Ras are 3.0 μ m; Concentration of emulsion used: 1～4 frame concentration of emulsion used is that 2.5～4.5%, 5 frame concentration of emulsion used are 0.5～1.5%; Cold rolling reduction ratio is controlled within the scope of 60-85%.Chrome-plated roller and conventional roller comparison, have higher hardness, fineness, wearability and scraping, can effectively eliminate or reduce the blemish such as aberration, roll marks, scuffing, zinc flow liner, has higher service life simultaneously.Strict each frame work roll surface roughness and the concentration of emulsion used controlled of cold-rolled process, can ensure that the operation of rolling is stable, reduces band steel and skids, and avoids belt steel surface to wipe and scratches, and presses against wound, and ensures that belt steel surface is clean.
In the time that painting plated substrate is even moved back on production surface, in alkali cleaning step, 1# alkali immersion trough is controlled at 30000-50000us/cm with scrubbing groove, 2# alkali immersion trough and scrubbing groove NaOH electrical conductivity of solution, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000-80000us/cm, cleaning section brush roll must ensure that 10 above (containing 10) come into operation, and emulsion remained, the iron powder of belt steel surface and other foreign material is cleaned up guaranteeing.In continuous annealing step, annealing heating temperature is controlled within the scope of 750～790 DEG C.In planarization step, planisher working roll adopts chrome-plated roller, and surface roughness is 2.4 μ m, Pc value >=80, and smooth elongation control is in 0.6～1.5% scope, within the roller phase is controlled at 150km.
In the time producing plating zinc on surface painting plated substrate, in alkali cleaning step, alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 30000-50000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000-80000us/cm, cleaning section brush roll must ensure that 8 above (containing 8) come into operation, and emulsion remained, the iron powder of belt steel surface and other foreign material is cleaned up guaranteeing.In described continuous annealing step, annealing heating temperature is controlled within the scope of 750～790 DEG C, and annealing time is controlled at 40～100s scope.In zinc-plated step, 460 ± 5 DEG C of zinc liquid temperatures, before band steel enters zinc pot, temperature is controlled at 450～470 DEG C, and the zinc-plated time is controlled at 5～20s, air knife nitrogen-blow N
2, cause cadmia defect to ensure that zinc pot table liquid and band steel zinc layer are not oxidized, thereby ensure final products surface quality.In polishing step, polishing machine working roll adopts chrome-plated roller, and surface roughness is 2.4 μ m, Pc value >=80, and polishing elongation control is in 0.5～1.4% scope, within the roller phase is controlled at 120km.Process section speed is controlled within the scope of 100～150m/min, keeps tension force and velocity-stabilization, avoids production process to cause the defects such as belt steel surface scuffing.
The production method of Coating substrate provided by the invention flat cold-rolled sheet is described below by embodiment.
Embodiment 1:
The steel billet composition quality percentage that adopts is: C, 0.12%; Si, 0.050%; Mn, 0.60%; P, 0.040%; S, 0.04%; Surplus is Fe.
Tapping temperature is 1280 DEG C, and roughing outlet temperature is 1200 DEG C, and finishing temperature is 950 DEG C, and coiling temperature is 750 DEG C.
Pickling 1# acid tank free acid is controlled at 55g/L, 90 DEG C of pickling temperatures, pickling speed 200m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 85%.
Subsequent handling adopts continuous annealing process to produce Coating substrate.
Alkali cleaning 1# alkali immersion trough is controlled at 50000us/cm with scrubbing groove, 2# alkali immersion trough and scrubbing groove NaOH electrical conductivity of solution, and electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 80000us/cm, and cleaning section brush roll drops into 11.
790 DEG C of continuous annealing furnace heating-up temperatures.
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 90, smooth elongation control is 1.5%, and the planisher working roll roller phase is controlled in 140～145km, and finished product thickness is 2.4mm.
Gained surface connect move back be coated with plated substrate metallographic structure figure as shown in Figure 1, product object performance and surface quality are as shown in table 2.
Embodiment 2:
The steel billet composition quality percentage that adopts is: C, 0.11%; Si, 0.040%; Mn, 0.50%; P, 0.035%; S, 0.036%, surplus is Fe.
Tapping temperature is 1220 DEG C, and roughing outlet temperature is 1090 DEG C, and finishing temperature is 910 DEG C, and coiling temperature is 710 DEG C.
Pickling 1# acid tank free acid concentration 5g/L, 75 DEG C of pickling temperatures, pickling speed 140m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.7 μ m, and 3,4 frame work roll surface roughness Ras are 0.6 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 2.5%, 5 frame concentration of emulsion used is 0.5%.Cold rolling reduction ratio is controlled at 60%.
Subsequent handling adopts continuous annealing process to produce Coating substrate.
Alkali cleaning 1# alkali immersion trough is controlled at 30000us/cm with scrubbing groove, 2# alkali immersion trough and scrubbing groove NaOH electrical conductivity of solution, and electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000us/cm, and cleaning section brush roll drops into 10.
750 DEG C of continuous annealing furnace heating-up temperatures.
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 80, smooth elongation control is 0.6%, and the planisher working roll roller phase is controlled in 10～15km.Finished product thickness is 0.5mm.
Product object performance and surface quality are as shown in table 2.
Embodiment 3:
The steel billet composition quality percentage that adopts is: C, 0.09%; Si, 0.040%; Mn, 0.40%; P, 0.030%; S, 0.03%, surplus is Fe.
Tapping temperature is 1250 DEG C, and roughing outlet temperature is 1105 DEG C, and finishing temperature is 935 DEG C, and coiling temperature is 734 DEG C.
Pickling 1# acid tank free acid is controlled at 53g/L, 80 DEG C of pickling temperatures, pickling speed 180m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 81%.
Subsequent handling adopts continuous annealing process to produce Coating substrate.
Alkali cleaning 1# alkali immersion trough is controlled at 45000us/cm with scrubbing groove, 2# alkali immersion trough and scrubbing groove NaOH electrical conductivity of solution, and electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 77000us/cm, and cleaning section brush roll drops into 11.
780 DEG C of continuous annealing furnace heating-up temperatures.
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 90, smooth elongation control is 1.2%, and the planisher working roll roller phase is controlled in 140～145km.Finished product thickness is 1.0mm.
Product object performance and surface quality are as shown in table 2.
Embodiment 4:
The steel billet composition quality percentage that adopts is: C, 0.08%; Si, 0.045%; Mn, 0.35%; P, 0.020%; S, 0.02%, surplus is Fe.
Tapping temperature is 1252 DEG C, and roughing outlet temperature is 1108 DEG C, and finishing temperature is 933 DEG C, and coiling temperature is 732 DEG C.
Pickling 1# acid tank free acid is controlled at 53g/L, 80 DEG C of pickling temperatures, pickling speed 180m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 81%.
Subsequent handling adopts continuous annealing process to produce Coating substrate.
Alkali cleaning 1# alkali immersion trough is controlled at 45000us/cm with scrubbing groove, 2# alkali immersion trough and scrubbing groove NaOH electrical conductivity of solution, and electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 77000us/cm, and cleaning section brush roll drops into 11.
780 DEG C of continuous annealing furnace heating-up temperatures.
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 90, smooth elongation control is 1.2%, and the planisher working roll roller phase is controlled in 140～145km.Finished product thickness is 1.0mm.
Product object performance and surface quality are as shown in table 2.
Embodiment 5:
The steel billet composition quality percentage that adopts is: C, 0.12%; Si, 0.050%; Mn, 0.60%; P, 0.040%; S, 0.04%, surplus is Fe.
Tapping temperature is 1280 DEG C, and roughing outlet temperature is 1200 DEG C, and finishing temperature is 950 DEG C, and coiling temperature is 750 DEG C.
Pickling 1# acid tank free acid is controlled at 55g/L, 90 DEG C of pickling temperatures, pickling speed 200m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 85%.
Subsequent handling adopts zincincation to produce Coating substrate.
Alkali cleaning alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 50000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 80000us/cm, and cleaning section brush roll drops into 9.
790 DEG C of continuous annealing furnace heating-up temperatures, annealing time 100s.
Zincincation: 465 DEG C of zinc liquid temperatures, band steel enters 470 DEG C of the front temperature of zinc pot, zinc-plated time 20s, air knife winding-up N
2.
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 90, polishing elongation control is 1.4%, within the polishing machine working roll roller phase is controlled at 120km.Finished product thickness 2.4mm.
Process speed is controlled at 150m/min left and right.
Product object performance and surface quality are as shown in table 2.
Embodiment 6:
The steel billet composition quality percentage that adopts is: C, 0.11%; Si, 0.040%; Mn, 0.50%; P, 0.035%; S, 0.036%, surplus is Fe.
Tapping temperature is 1220 DEG C, and roughing outlet temperature is 1090 DEG C, and finishing temperature is 910 DEG C, and coiling temperature is 710 DEG C.
Pickling 1# acid tank free acid concentration 50g/L, 75 DEG C of pickling temperatures, pickling speed 140m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.7 μ m, and 3,4 frame work roll surface roughness Ras are 0.6 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 2.5%, 5 frame concentration of emulsion used is 0.5%.Cold rolling reduction ratio is controlled at 60%.
Subsequent handling adopts zincincation to produce Coating substrate.
Alkali cleaning alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 30000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000us/cm, and cleaning section brush roll drops into 8.
750 DEG C of continuous annealing furnace heating-up temperatures.
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 80, polishing elongation control is 0.5%, and the polishing machine working roll roller phase is controlled in 10～15km.Finished product thickness is 0.5mm.
Process speed is controlled at 100m/min left and right.
Product object performance and surface quality are as shown in table 2.
Embodiment 7:
The steel billet composition quality percentage that adopts is: C, 0.09%; Si, 0.040%; Mn, 0.40%; P, 0.030%; S, 0.030%, surplus is Fe.
Tapping temperature is 1250 DEG C, and roughing outlet temperature is 1105 DEG C, and finishing temperature is 935 DEG C, and coiling temperature is 734 DEG C.
Pickling 1# acid tank free acid is controlled at 53g/L, 80 DEG C of pickling temperatures, pickling speed 180m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 81%.
Subsequent handling adopts zincincation to produce Coating substrate.
Alkali cleaning alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 45000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 77000us/cm, and cleaning section brush roll drops into 8.
780 DEG C of continuous annealing furnace heating-up temperatures.
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 85, polishing elongation control is 1.2%, and the polishing machine working roll roller phase is controlled in 10～15km.Finished product thickness is 1.0mm.
Process speed is controlled at 120m/min left and right.
Product object performance and surface quality are as shown in table 2.
Embodiment 8:
The steel billet composition quality percentage that adopts is: C, 0.08%; Si, 0.045%; Mn, 0.35%; P, 0.020%; S, 0.020%, surplus is Fe.
Tapping temperature is 1252 DEG C, and roughing outlet temperature is 1108 DEG C, and finishing temperature is 933 DEG C, and coiling temperature is 732 DEG C.
Pickling 1# acid tank free acid is controlled at 53g/L, 80 DEG C of pickling temperatures, pickling speed 180m/min.
Milling train 1,2,5 frame working rolls use chrome-plated roller, and 1,2 frame work roll surface roughness Ras are 0.8 μ m, and 3,4 frame work roll surface roughness Ras are 0.7 μ m, and 5 frame work roll surface roughness Ras are 3.0 μ m; 1～4 frame concentration of emulsion used is that 4.5%, 5 frame concentration of emulsion used is 1.5%.Cold rolling reduction ratio is controlled at 81%.
Subsequent handling adopts zincincation to produce Coating substrate.
Alkali cleaning alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 45000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 77000us/cm, and cleaning section brush roll drops into 8.
780 DEG C of continuous annealing furnace heating-up temperatures.
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value 85, polishing elongation control is 1.2%, and the polishing machine working roll roller phase is controlled in 10～15km.Finished product thickness is 1.0mm.
Process speed is controlled at 150m/min left and right.
Product object performance and surface quality are as shown in table 2.
Table 2 product object performance and surface quality
It should be noted last that, above detailed description of the invention is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. a production method for flat cold-rolled sheet for Coating substrate, comprises the steps:
1) steel-making makes steel billet;
2) steel billet is made to cold-rolled steel coils by hot rolling, pickling and cold-rolling production process;
3) cold-rolled steel coils is moved back to production technology by company or zinc-plated production technology makes Coating substrate flat cold-rolled sheet, wherein, connect that to move back production technology be alkali cleaning, annealing and smooth, zinc-plated production technology is alkali cleaning, annealing, zinc-plated and polishing;
It is characterized in that,
Described steel billet chemical composition mass percent is: C≤0.12%, and Si≤0.05%, Mn≤0.60%, P≤0.04%, S≤0.04%, surplus is Fe;
It is as follows that described steel billet makes in the production technology of cold-rolled steel coils technical parameter control:
In hot rolling technology, tapping temperature is 1250 ± 30 DEG C, and roughing outlet temperature is 1100 ± 10 DEG C, and finishing temperature is 930 ± 20 DEG C, and coiling temperature is 730 ± 20 DEG C;
In acid cleaning process, 1# acid tank free acid concentration is controlled at 50～55g/L, 75～90 DEG C of pickling temperatures, pickling speed 140～200m/min;
In cold-rolling process, milling train 1,2,5 frame working rolls use chrome-plated roller, and operation roll of mill Roughness Surface on Control is that 1,2 frame roughness Ras are 0.7～0.8 μ m, and 3,4 frame roughness Ras are 0.6～0.7 μ m, and 5 frame roughness Ras are 3.0 μ m; Concentration of emulsion used is that 1～4 frame concentration of emulsion used is that 2.5～4.5%, 5 frame concentration of emulsion used are 0.5～1.5%; Cold rolling reduction ratio is controlled within the scope of 60-85%;
It is as follows that technical parameter control is moved back in production technology by described company:
In alkali washing process, 1# alkali immersion trough and scrub groove and 2# alkali immersion trough and the NaOH electrical conductivity of solution of scrubbing groove are controlled at 30000-50000us/cm, the NaOH electrical conductivity of solution of electrolytic cleaning tank is controlled at 50000-80000us/cm, and cleaning section brush roll uses more than 10;
Continuous annealing furnace heating-up temperature is 750～790 DEG C;
Planisher working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value >=80, smooth elongation control is in 0.6～1.5% scope, within the roller phase is controlled at 150km;
In described zinc-plated production technology, technical parameter control is as follows:
In alkali washing process, alkali immersion trough and scrub groove NaOH electrical conductivity of solution and be controlled at 30000-50000us/cm, electrolytic cleaning tank NaOH electrical conductivity of solution is controlled at 50000-80000us/cm, and cleaning section brush roll uses more than 8;
750～790 DEG C of continuous annealing furnace heating-up temperatures, annealing time 40～100s;
In zincincation, 460 ± 5 DEG C of zinc liquid temperatures, before band steel enters zinc pot, temperature is controlled at 450～470 DEG C, zinc-plated time 5～20s, air knife winding-up N
2;
Polishing machine working roll adopts chrome-plated roller, surface roughness 2.4 μ m, and Pc value >=80, polishing elongation control is in 0.5～1.4% scope, and within the roller phase is controlled at 120km, process speed is controlled within the scope of 100～150m/min.
2. the production method of flat cold-rolled sheet for Coating substrate according to claim 1, is characterized in that, described steel billet chemical composition mass percent is: C≤0.10%, Si≤0.040%, Mn≤0.40%, P≤0.030%, S≤0.030%, surplus is Fe.
3. the production method of flat cold-rolled sheet for Coating substrate according to claim 2, is characterized in that, described steel billet chemical composition mass percent is: C≤0.08%, Si≤0.050%, Mn≤0.40%, P≤0.020%, S≤0.025%, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210205028.XA CN102716905B (en) | 2012-06-18 | 2012-06-18 | Method for producing cold-rolled sheet for surface coating and plating base plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210205028.XA CN102716905B (en) | 2012-06-18 | 2012-06-18 | Method for producing cold-rolled sheet for surface coating and plating base plate |
Publications (2)
| Publication Number | Publication Date |
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| CN102716905A CN102716905A (en) | 2012-10-10 |
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| CN106011423B (en) * | 2016-06-15 | 2018-08-31 | 南阳师范学院 | A kind of band temperature rolling mill practice of cold rolling non-oriented electrical steel |
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| CN115537648A (en) * | 2021-06-30 | 2022-12-30 | 上海梅山钢铁股份有限公司 | High-surface-performance cold-rolled continuously annealed steel plate and manufacturing method thereof |
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