CN103372567B - A kind of method of cold continuous rolling production texturing surface ferrite stainless steel band - Google Patents
A kind of method of cold continuous rolling production texturing surface ferrite stainless steel band Download PDFInfo
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Abstract
A method for cold continuous rolling production texturing surface ferrite stainless steel band, it comprises the steps: 1) five frame tandem cold continuous rollings, adopt five frame tandem tandem mills, operation roll of mill roller footpath is 300 ~ 500mm, endless rolling; The gloss level of roll of first to fourth frame at 0.5 ~ 1.0 μm, and reduces successively; The working roll of the 5th frame is through texturing and chromium plating process; Rolling adopts emulsion lubrication rolling, emulsion temperature 50 ~ 60 DEG C, and emulsion is ejected into the effect that Cooling and Lubricator is played at roll gap place, by the strip temperature control after cold rolling below 150 DEG C; The accumulative reduction ratio of first to fourth frame is greater than 60%, and the roughness of cold-strip steel, 4 ~ 10%, controls between 0.5 ~ 1.0 μm by the reduction ratio of the 5th frame; 2) cold rolling rear band steel carries out annealing and pickling process, heating anneal in continuous horizontal type gas furnace, annealing temperature 800 ~ 1000 DEG C, completes the recrystallization of band steel; Successively through Na after annealing
2sO
4solution and H
2sO
4electrolysis of solutions pickling and nitric hydrofluoric acid mixed acid solution soak acid-cleaning, obtain final finished surface.
Description
Technical field
The present invention relates to stainless steel material and manufacture method thereof, particularly a kind of method of cold continuous rolling production texturing surface ferrite stainless steel band
Background technology
According to standard GB/T 3280-2007 " cold rolled stainless steel sheet and steel band " regulation, stainless Surface Machining type comprises 2D surface, 2B surface, BA is surperficial, 3# is surperficial, HL is surperficial.Wherein 2D surface processing technique be cold rolling after heat-treat and pickling, obtain matt surface, then obtain texturing surface product through dull roll is smooth.But because this production technology needs to carry out an independently smooth operation of dull roll after cold rolling, the decline of lumber recovery and the rising of production cost can be brought.
Because texturing surface stainless steel has sub-light characteristic, be thus widely used in the industries such as building roof, interior decoration and meal kitchen tool.Simultaneously because the hair side stainless steel that roughness is larger can provide larger surface adhesion force, be applicable to carrying out sequent surface process, bring advantage to the operations such as plating and coating.
See Fig. 1, the production procedure of traditional texturing surface ferrite stainless steel band comprises: hot-roll annealing pickling volume 10 → multi-roll mill reversible rolling 20 → cold coiling annealing and pickling 30 → smooth 40 → finished product steel belt 50.
Also describe just like Chinese patent CN101244427A " method for producing textured surface accurate stainless steel band " and CN101537425A " a kind of cold-rolling process of corrosion resistant plate of frosting " method that employing 20 roller reversable cold-rolling machine produces hair side stainless steel band, its Patent CN101244427A applies 20 roller reversible cold rolling, in the end a passage adopts hair rolling system, the material W6Mo5Cr4V2 of working roll, carry out sandblast texturing process with the sand that granularity is 46-100, after rolling, obtain the texturing surface stainless steel belt that rough surface Ra is 0.5-1.0; The working roll roughness Ra that patent CN101537425A adopts is 0.3-0.8 μm, is with steel through bright annealing after reversible rolling, then is that the planisher of 0.4-0.5 μm is smooth through gloss level of roll, obtains texturing surface stainless steel product.
Adopt 20 roll reversing roller production texturing surface stainless steel methods, if increase cold rolling after-baking and smooth operation, then cost increases and lumber recovery reduction; Even if do not increase cold rolling after-baking and the operation such as smooth, because the work roll diameter of mill itself is less, surface texturing decorative pattern is periodically comparatively obvious, and texturing effect is not satisfactory.The present invention is a kind of method of cold continuous rolling production texturing surface ferrite stainless steel band, owing to not increasing heat treatment and the operation such as smooth makes production efficiency improve, adopt surface through the big roller footpath working roll of electric spark and chromium plating process simultaneously, obtain the stainless steel product that surface texturing is respond well.
Summary of the invention
The object of the invention is a kind of method proposing cold continuous rolling production texturing ferritic stainless steel band, it adopts the hot-rolled stainless steel steel band of conventional annealing pickling to be raw material, five Stands Cold Tandem Mill groups are adopted to carry out continuous cold rolling, operation of rolling roll gap place sprays emulsion and carries out lubrication and rolling, the working roll of tandem mills is Cr5 forged steel, and the 5th frame work roll surface obtains surface roughness and the anti-wear performance of requirement after texturing and chromium plating process.The present invention not only can play the high efficiency feature of Continuous mill train greatly, and can reduce production process, improves lumber recovery and qualification rate, reduces production cost.
For achieving the above object, technical scheme of the present invention is:
A method for cold continuous rolling production texturing surface ferrite stainless steel band, it comprises the steps:
1) five frame tandem cold continuous rollings
Adopt five frame tandem tandem mills, operation roll of mill roller footpath is 300 ~ 500mm, and raw band steel carries out laser weld in unit inlet, makes front and back band steel from beginning to end, realizes endless rolling;
The working roll of milling train adopts forged steel material, Shore hardness >=90, and the gloss level of roll of first to fourth frame at 0.5 ~ 1.0 μm, and reduces successively; The working roll of the 5th frame is through texturing and chromium plating process, and the roughness after its grinding is 0.5 ~ 1.5 μm, and frosting treatment adopts electric spark texturing technique, and the gloss level of roll Ra after texturing is between 3.0 ~ 4.0 μm, and peak value is between 55 ~ 80peaks/cm; Roll after texturing carries out chromium plating process, and chromium coating is in be full of cracks structure, and zinc coat thickness control is at 5-10 μm;
Rolling adopts emulsion lubrication rolling, and emulsion temperature controls at 50 ~ 60 DEG C, and emulsion is ejected into the effect that Cooling and Lubricator is played at roll gap place, by the strip temperature control after cold rolling below 150 DEG C; The accumulative reduction ratio of first to fourth frame is greater than 60%, and the roughness of cold-strip steel, 4 ~ 10%, controls between 0.5 ~ 1.0 μm by the reduction ratio of the 5th frame;
2) the band steel after cold rolling carries out annealing and pickling process, heating anneal in continuous horizontal type gas furnace, annealing temperature 800 ~ 1000 DEG C, completes the recrystallization of band steel; Successively through Na after annealing
2sO
4solution and H
2sO
4electrolysis of solutions pickling and nitric hydrofluoric acid mixed acid solution soak acid-cleaning, obtain final finished surface.
Further, described working roll adopts 5Cr forged steel material.Working roll width is 1200 ~ 2000mm, and maximum rolling force is greater than 20000kN.
In addition, described emulsion is oil-in-water emulsion, and its dynamic viscosity (40 DEG C) is at 50 ~ 100mm
2between/s, oil concentration is 2 ~ 10wt%.
In the inventive method,
Employing working roll roller footpath is the five frame connection rolling machine group of 300 ~ 500mm, and can realize high efficiency production, maximum mill speed is more than 500m/min.Adopt laser welder to connect front and back band steel, the non-end to end rolling section in reversible rolling can be avoided, improve lumber recovery about 3%.
Adopt the working roll of electric spark roughing method to 5Cr forged steel material to carry out frosting treatment, can be controlled texturing effect by parameters such as pulse width, pulse spacing, peak point currents and optimize, there is efficient, stable, controlled feature.Roll after texturing can extend more than its rolling milimeter number to 50 kilometer after chromium plating process.
Employing concentration is the high viscosity oil-in-water emulsion rolling of 2 ~ 10wt%, while cooling roll and band steel, form the oil film of stable high extreme pressure property, can avoid ferritic stainless steel that the blemish such as heat scuffing occur in continuous rolling process, ensure surface quality.
Distributed by the pressure controlling each frame, good for the surface texturing pattern of the 5th frame working roll can be ensured to copy to belt steel surface, hard steel volume roughness will be rolled and control between 0.5 ~ 1.0 μm.See Fig. 3, Fig. 4.
After rolling after the recrystallization annealing of 800 ~ 1000 DEG C, material, while having good texturing surface, obtains good mechanics and corrosive nature.
Successively through Na after annealing
2sO
4solution and H
2sO
4electrolysis of solutions pickling and nitric hydrofluoric acid mixed acid solution soak acid-cleaning, can remove the iron scale that flash annealing generates, and eliminates the metallic luster of belt steel surface, obtains the final finished of matt surface.
Beneficial effect of the present invention:
Adopt production method of the present invention, namely carry out through tandem continuous-rolling the ferritic stainless steel steel band that mao rolling system obtains texturing surface, not only there is good surface quality, dimensional accuracy and plate shape, and process flow is simpler compared with traditional texturing surface production, decrease cold rolling after smooth operation, when ensureing product mechanical property and surface quality, substantially increasing lumber recovery and qualification rate, reducing production cost.This method can be widely used in the production of ferritic stainless steel.
Accompanying drawing explanation
Fig. 1 is traditional texturing surface stainless steel production method.
Fig. 2 is the schematic diagram of present invention process flow process.
Fig. 3, Fig. 4 are the stereoscan photograph of texturing surface ferrite stainless steel surface topography of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
See Fig. 2, present invention process flow process: hot-roll annealing pickling volume 1 → five frame tandem cold continuous rolling 2 → cold coiling annealing and pickling 3 → finished product steel belt 4.
Embodiment 1
Thickness be the hot rolling stock roll of 4.0mm when five frame tandem cold-mill group rollings, strictly to control work roll surface roughness and the reduction ratio of each frame.The working roll width of milling train is 1780mm, and diameter is 450mm, and maximum rolling force is 27000kN.Working roll is through 80 order abrasion wheel grindings, and the roll surface roughness of the first to the four frame is respectively 0.93 μm, 0.88 μm, 0.72 μm, 0.55 μm, and the reduction ratio of the first to five frame is respectively 26.3%, 25.9%, 22.3%, 20.2%, 3.5%.The Grinding Roughness of the 5th frame working roll is 1.2 μm.Gloss level of roll Ra after texturing is 3.8 μm, and peak value is 60peaks/cm.Roll after texturing carries out chromium plating process.The oil-in-water emulsion dynamic viscosity (40 DEG C) used is 60mm
2/ s, oil concentration is 2.3wt%, rolls rear band steel and is cooled to 90 DEG C.Outlet mill speed is 500m/min.Belt steel surface roughness after rolling is 0.7 μm, and the final products surface roughness after 880 DEG C of annealing also pickling processes is 0.9 μm.
Embodiment 2
Thickness be the hot rolling stock roll of 3.0mm when five frame tandem cold-mill group rollings, strictly to control work roll surface roughness and the reduction ratio of each frame.The working roll width of milling train is 1780mm, and diameter is 400mm, and maximum rolling force is 27000kN.Operation roll of mill is through 80 order abrasion wheel grindings, the roll surface roughness of the first to the four frame is respectively 1.04 μm, 0.86 μm, 0.75 μm, 0.51 μm, and the reduction ratio of the first to five frame is respectively 32.2%, 34.1%, 27.4%, 25.2%, 4.0%.The Grinding Roughness of the 5th frame working roll is 1.1 μm.Gloss level of roll Ra after texturing is 3.6 μm, and peak value is 71peaks/cm.Roll after texturing carries out chromium plating process.The emulsion dynamic viscosity (40 DEG C) used is 70mm
2/ s, concentration is 4.1wt%, rolls rear band steel and is cooled to 95 DEG C.Outlet mill speed is 650m/min.Belt steel surface roughness after rolling is 0.65 μm, through annealing temperature 960 DEG C annealing, and the surface roughness 0.74 μm of final products after the process of annealing and pickling unit.
Embodiment 3
The hot rolling stock roll of thickness 6.0mm, when five frame tandem cold-mill group rollings, strictly will control work roll surface roughness and the reduction ratio of each frame.The working roll width of milling train is 1420mm, and diameter is 300mm, and maximum rolling force is 23000kN.Operation roll of mill is through 80 order abrasion wheel grindings, the roll surface roughness of the first to the four frame is respectively 1.21 μm, 0.91 μm, 0.73 μm, 0.43 μm, and the reduction ratio of the first to five frame is respectively 33.3%, 22.5%, 16.1%, 15.4%, 9.1%.The Grinding Roughness of the 5th frame working roll is 1.2 μm.Gloss level of roll Ra after texturing is 3.8 μm, and peak value is 58peaks/cm.Roll after texturing carries out chromium plating process.The emulsion dynamic viscosity (40 DEG C) used is 95mm
2/ s, concentration is 8.3wt%, rolls rear band steel and is cooled to 120 DEG C.Outlet mill speed is 600m/min.Belt steel surface roughness after rolling is 0.85 μm, through annealing temperature 990 DEG C annealing, and the surface roughness 0.93 μm of final products after the process of annealing and pickling unit.
The present invention is adopted to manufacture hair side stainless steel, not only can obtain the product with good surface quality, dimensional accuracy and plate shape, and process flow is simpler compared with traditional texturing surface production, decrease cold rolling after smooth operation, when ensureing product mechanical property and surface quality, substantially increase lumber recovery and qualification rate, reduce production cost.The inventive method can be widely used in the production of ferritic stainless steel.
Claims (4)
1. a method for cold continuous rolling production texturing surface ferrite stainless steel band, it comprises the steps:
1) five frame tandem cold continuous rollings
Adopt five frame tandem tandem mills, operation roll of mill roller footpath is 300 ~ 500mm, and raw band steel carries out laser weld in unit inlet, makes front and back band steel from beginning to end, realizes endless rolling;
The working roll of milling train adopts forged steel material, Shore hardness >=90, and the gloss level of roll of first to fourth frame at 0.5 ~ 1.0 μm, and reduces successively; The working roll of the 5th frame is through texturing and chromium plating process, and the roughness after its grinding is 0.5 ~ 1.5 μm, and frosting treatment adopts electric spark texturing technique, and the gloss level of roll Ra after texturing is between 3.0 ~ 4.0 μm, and peak value is between 55 ~ 80peaks/cm; Roll after texturing carries out chromium plating process, and chromium coating is in be full of cracks structure, and zinc coat thickness control is at 5 ~ 10 μm;
Rolling adopts emulsion lubrication rolling, and emulsion temperature controls at 50 ~ 60 DEG C, and emulsion is ejected into the effect that Cooling and Lubricator is played at roll gap place, by the strip temperature control after cold rolling below 150 DEG C; The accumulative reduction ratio of first to fourth frame is greater than 60%, and the roughness of cold-strip steel, 4 ~ 10%, controls between 0.5 ~ 1.0 μm by the reduction ratio of the 5th frame;
2) the band steel after cold rolling carries out annealing and pickling process, heating anneal in continuous horizontal type gas furnace, annealing temperature 800 ~ 1000 DEG C, completes the recrystallization of band steel; Successively through Na after annealing
2sO
4solution, H
2sO
4electrolysis of solutions pickling and nitric hydrofluoric acid mixed acid solution soak acid-cleaning, obtain final finished surface.
2. the method for cold continuous rolling production texturing surface ferrite stainless steel band as claimed in claim 1, it is characterized in that, described working roll width is 1200 ~ 2000mm, and maximum rolling force is greater than 20000kN, and maximum mill speed is greater than 500m/min.
3. the method for cold continuous rolling production texturing surface ferrite stainless steel band as claimed in claim 1 or 2, is characterized in that, described working roll adopts 5Cr forged steel material.
4. the method for cold continuous rolling production texturing surface ferrite stainless steel band as claimed in claim 1, it is characterized in that, described emulsion is oil-in-water emulsion, and its dynamic viscosity 40 DEG C is at 50-100mm
2between/s, oil concentration is 2 ~ 10wt%.
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