WO2014146540A1 - 一种钢板表面处理方法及其装置 - Google Patents

一种钢板表面处理方法及其装置 Download PDF

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Publication number
WO2014146540A1
WO2014146540A1 PCT/CN2014/072895 CN2014072895W WO2014146540A1 WO 2014146540 A1 WO2014146540 A1 WO 2014146540A1 CN 2014072895 W CN2014072895 W CN 2014072895W WO 2014146540 A1 WO2014146540 A1 WO 2014146540A1
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WIPO (PCT)
Prior art keywords
strip
surface treatment
steel
unit
pressure injection
Prior art date
Application number
PCT/CN2014/072895
Other languages
English (en)
French (fr)
Inventor
全基哲
李山青
段明南
王英杰
徐江华
瞿培磊
Original Assignee
宝山钢铁股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宝山钢铁股份有限公司 filed Critical 宝山钢铁股份有限公司
Priority to KR1020177021830A priority Critical patent/KR101889888B1/ko
Priority to DE112014001546.6T priority patent/DE112014001546T5/de
Priority to JP2015551980A priority patent/JP6251753B2/ja
Priority to US14/649,675 priority patent/US9815172B2/en
Publication of WO2014146540A1 publication Critical patent/WO2014146540A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0284—Cleaning devices removing liquids removing lubricants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0287—Cleaning devices removing solid particles, e.g. dust, rust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically

Definitions

  • the invention belongs to the technical field of cold-rolled steel plate post-treatment line, in particular, the invention relates to a steel plate surface treatment method and a device thereof, the steel plate surface treatment method and the device thereof mainly through a high-pressure spraying device or a centrifugal spraying device A certain proportion of a mixture of water and solid particles is impacted on the surface of the strip to impart a certain roughness to the surface of the strip, while removing grease, scale and some dirt from the surface of the strip, in addition, through the impact belt
  • the steel surface method which modulates the mechanical properties of the strip, completely or partially replaces the function of the leveling process. Background technique
  • the hot-dip galvanizing product needs to enter the continuous galvanizing unit, and the electro-galvanized product needs continuous annealing to enter the continuous The electro-galvanizing unit, and the Pu cold product can form a cold-rolled product directly after the continuous annealing process, or can pass the hood annealing process.
  • the surface condition and cleanliness are prerequisites for ensuring the quality of the continuous de-plating layer.
  • the surface is inevitably left with various impurities, such as The dross in the rolling oil, the iron powder remaining during the cold rolling, the accumulated dust, the welding slag generated when the head is welded, and the like.
  • the strip must be cleaned before it is retracted to completely remove the oil on the strip surface. Otherwise, various oils remaining on the surface will form carbonaceous stains during the annealing process, pollute the furnace atmosphere, affect the decarburization efficiency, and even cause carbonation. In addition, the oil stain will also cause the surface quality of the strip to change and cause the bottom of the furnace to be nodulated, causing defects such as scratches on the surface of the strip.
  • a cleaning process also known as a degreasing process, is carried out on the continuous coating unit prior to annealing, the purpose of which is to remove various debris remaining on the strip surface.
  • the clean state of the surface of the incoming strip directly determines the surface quality of the final product.
  • alkali washing, scrubbing and electrolysis are provided in the inlet section of the continuous retreating process.
  • Surface pretreatment processes such as cleaning, hot water rinsing, etc., to ensure the quality of the strip surface entering the continuous retreat process.
  • a special degreasing device is provided before the hood annealing.
  • the dirt on the surface of the strip often cannot be completely removed, resulting in spots, streaks, uneven coating on the surface after annealing or plating of the strip, which affects the surface quality of the product.
  • the field technicians have made a lot of adjustment and optimization from the process of adjusting the alkali spray washing process, the scrubbing process, the degreasing agent, the lye concentration and the temperature, but because of the diversity and complexity of the dirt on the strip surface, such as The composition of the dirt on the surface of different strips is inconsistent, the adhesion between the dirt on the strip surface and the strip is inconsistent, and the strip runs faster, which may cause the surface of the strip to be completely cleaned during production. phenomenon.
  • the surface of the strip after cold rolling needs to reach a certain roughness, but the surface roughness of the strip after cold rolling is limited by the rolling process and the limitation of the rolls. Often unable to meet the requirements.
  • the surface roughness of the strip steel can not reach the standard.
  • the roughness of the work roll during the leveling process has the greatest influence on the surface roughness of the strip.
  • the work rolls are treated by laser texturing, electric cremation, and shot blasting before the machine is started, so that the surface of the work roll has a certain roughness.
  • the roll surface roughness is the key factor determining the surface roughness of the strip.
  • the surface roughness of the roll decreases, and the surface roughness of the strip cannot meet the user's requirements.
  • the method of controlling the roughness of the strip during the leveling process is only one method of controlling the roughness of the roll. In actual production, when the roughness of the finished product is not up to the requirement, only the roll can be replaced, and the roughness can not be flexibly controlled in the production;
  • a high-density current degreasing cleaning technology has been developed abroad for the surface pretreatment of strip steel.
  • the principle is to use alkali.
  • the degreasing liquid is a conductive medium, and a high-density current of about 200A/dm 2 is formed on the surface of the strip steel, so that a large amount of air bubbles are instantaneously generated on the surface of the strip steel, and the oil stain layer on the surface of the strip is blasted, thereby cleaning the strip steel.
  • the domestic patent CN102357541 A discloses a method and a system for cleaning the surface of a strip by hot water. The principle is that before the strip enters the alkaline scrubbing, the upper and lower surfaces of the strip are sprayed with hot water with a pressure of 8-12 Mpa. The temperature is 40 ⁇ 70 °C, which reduces the number of equipment combinations and energy consumption in the subsequent alkaline scrubbing and electrolysis process.
  • the hot water spray method can clean the debris with weak adhesion to the strip surface, but the debris which is tightly combined with the strip steel and the trapped in the concave layer of the strip steel The object can not be completely cleaned.
  • the domestic patent CN 201217016 Y discloses an ultrasonic treatment device for strip surface cleaning processing, the principle of which is to combine strip surface cleaning and ultrasonic treatment in a strip alkaline washing (pickling) or electrolytic caustic washing (pickling) tank. An ultrasonic generating device is installed to clean and clean the surface of the strip.
  • the method is also used as an improved method of the traditional degreasing process, and the flow of the lye is improved, that is, the removal of the oil film on the strip surface has a large effect, but the debris closely combined with the strip steel cannot be completely eliminated.
  • the domestic patent CN101537431A introduces an on-line prediction and control method for the surface roughness of thin strip steel, which is characterized by the roughness data of the work rolls of the leveling machine and the length of the strip and the rolling force and elongation in the length of different strips. The roughness values in different lengths of the strip steel are used to predict and control the strip roughness when the strip roughness target value is not within the predicted range.
  • Patent CN1804739A introduces a flat surface roughness prediction and control technology for flattening machine. Its characteristics are similar to those of the above patents, mainly by establishing a mathematical model between roll roughness and rolling kilometers and the reduction rate and heritability. The mathematical relationship between the two, and based on the field data to establish a flat machine online prediction of the finished product roughness model, predict and control the surface roughness of the strip. In the same way, the method can only reduce the roughness error of the strip steel, and can not fundamentally solve the problem that the roughness in the conventional process cannot reach the standard.
  • Patent CN 101675184 A discloses a cleaning method for a steel plate and a continuous cleaning device for a steel plate, the principle of which is to spray a ultrasonic cleaning liquid having a frequency of 0.8 MHz to 3 MHz at a right angle with respect to the surface of the steel plate by a shower method or a curtain method.
  • the angle of 1 to 80° is applied to the surface of the steel sheet at an angle inclined to the direction opposite to the moving direction, whereby high-frequency ultrasonic waves can be used for cleaning the surface of the moving steel sheet, thereby improving the cleaning effect and the cleaning speed.
  • the method utilizes the cavitation phenomenon of the ultrasonic wave on the surface of the steel plate, strengthens the chemical reaction of the cleaning, provides the impact force, and promotes the cleaning effect, but the dust which is tightly combined with the steel strip cannot be completely removed.
  • the Japanese applicant's patent CN1622869A introduced a metal steel sheet surface treatment.
  • a method for manufacturing a device and a metal plate characterized in that a method of controlling a surface roughness of a steel sheet by projecting solid particles having an average particle diameter of 300 ⁇ m or less onto a continuously conveyed metal plate, the invention mainly consisting of a projection chamber provided with a projection device, a cleaning device disposed on the surface of the cleaning metal plate downstream of the projection chamber, specifically, first, the metal plate enters the projection chamber, the projection device in the projection chamber impacts the dry solid particles on the surface of the steel strip, and the cleaning chamber downstream of the projection chamber utilizes the air nozzle The solid particles on the surface of the metal plate are washed.
  • the medium for impacting the surface of the strip in the invention is dry solid particles, which will result in the need for the metal sheet entering the projection chamber to be dry in order to maintain the fluidity of the solid particles. Therefore, it is necessary to provide a steel sheet on the projection chamber. Cleaning and drying equipment, resulting in complex units. Moreover, no liquid can enter the unit during the entire projection and cleaning process, which places high demands on the sealing of the equipment, etc., which is difficult to achieve in actual production.
  • the solid particles are directly impacted on the surface of the metal plate. Since the particle size of the solid particles is larger than the particle size of the metal plate, the metal particles are easily embedded on the surface of the metal plate, and the air jet method in the invention cannot be achieved. Thoroughly remove the solid particles on the surface of the strip. Summary of the invention
  • the process and apparatus impact a certain proportion of water and solid abrasive mixture on the surface of the steel sheet by a high pressure abrasive spraying device, thereby imparting a certain roughness to the surface of the steel strip, and removing grease, iron oxide scale and some dirt on the surface of the residual steel strip. Things.
  • the flexible control of the surface roughness of the steel sheet after rolling is achieved, in particular, the high-strength steel with high strength is given the roughness required by the user, and the surface roughness of the strip steel when producing high-strength steel is solved by the rolling process and the roll.
  • the limitation of the material is that the roughness cannot meet the standard.
  • by spraying the mixed abrasive on the surface of the steel sheet the grease, iron oxide scale and some dirt remaining on the surface of the strip are removed, the load on the surface pretreatment section of the strip and the length of the equipment section are reduced, and the length is increased. The degree of cleaning of the strip surface.
  • the method of impacting the surface of the strip by the mixture of the solid abrasive and the water is used to modulate the mechanical properties of the strip, thereby completely or partially replacing the work of the flat machine.
  • the steel plate surface treatment method of the invention is arranged on the inlet section of the continuous hot-dip galvanizing production line, the continuous electrogalvanizing production line, the continuous annealing production line and the continuous degreasing production line, and the strip steel is flexibly controlled on the strip by the method of impacting the solid mixed abrasive on the strip surface.
  • the surface roughness of the strip is controlled by the method of impacting the solid mixed abrasive on the surface of the strip steel, and the mechanical properties of the strip steel are improved, and the flattening process function is completely or partially replaced.
  • a steel sheet surface treatment method characterized in that
  • the steel sheet surface treatment method sequence includes:
  • a strip surface treatment unit 1 equipped with a high pressure injection device 1-1 or a centrifugal ejector device 1-2, which may be arranged separately or in a mixed arrangement,
  • the high pressure spraying device 1-1 or the centrifugal blasting device 1-2 sprays a mixture of solid abrasive and water, that is, a slurry, on the surface of the steel strip.
  • the steel sheet surface treatment method includes:
  • the slurry supply unit 4 for supplying the slurry and the abrasive recovery unit 5 are supplied to the strip surface treatment unit 1 equipped with the high pressure injection device 1-1 or the centrifugal blasting device 1-2.
  • the apparatus for applying the present invention to an actual production line is shown in Figs. 3 to 9.
  • the detailed explanation of the invention applied to the inlet section of the cold-rolled strip post-treatment production line is that the strip 6 after cold rolling enters the strip surface treatment device 1, and at this time, various dirt remains on the surface of the strip, including rolling.
  • the above dirt must be completely removed.
  • the surface roughness of the strip after rolling can not meet the user's requirements for the surface roughness of the product.
  • a plurality of sets of high-pressure injection devices 1-1 or centrifugal ejector devices 1-2 are arranged along the advancing direction of the strip, and can also be arranged along the width direction of the strip.
  • the mixture of solid abrasive and water sprayed from the high pressure spray device 1-1 or the centrifugal spray device 1-2 will uniformly impact on the surface of the steel strip, At the time, the dirt adhering to the surface of the strip is separated from the strip by the impact of the solid abrasive and water, and is carried away from the strip surface by the water, thereby achieving the purpose of removing dirt on the surface of the strip.
  • the solid abrasive impinging on the surface of the strip has a certain speed and energy. At this energy and speed, the solid abrasive impacts the surface of the strip. Because the hardness of the solid abrasive is greater than the hardness of the strip, the impact of the solid abrasive is When the surface of the strip is steel, some plastic deformation and elastic deformation occur on the surface of the strip. After the solid abrasive is ejected, a series of randomly arranged small dimples are formed on the surface of the strip to achieve the purpose of controlling the surface roughness of the strip.
  • the surface roughness of the strip is determined by factors such as the moving speed of the strip, the speed and energy of the solid abrasive impinging on the strip surface, and can be flexibly configured according to the product requirements.
  • the surface of the strip is absent or a small amount of dirt exists, and the surface roughness of the strip has satisfied the requirements of the next process, and the mixture of the abrasive and water after the spray is deposited on the strip surface treatment unit.
  • the lower portion is treated by the abrasive excess recovery device 5 and then recirculated to the abrasive supply device 4.
  • the strip after the strip surface treatment unit 1 retains a certain amount of abrasive, and the strip surface is washed by the strip surface cleaning unit 2 disposed downstream of the strip surface treatment unit 1 for the strip surface.
  • the surface of the strip is washed with pure water of a certain pressure in the cleaning unit 2, and no residual solid particles are left on the surface of the strip after the rinsing, and then dried in the strip surface drying unit 3, and then enters the next process.
  • the detailed explanation of the invention applied to the finishing section of the cold-rolled strip post-treatment production line is as follows: after the cold-rolled strip heat treatment or the surface coating treatment, the strip enters the surface treatment method section, at this time, the surface roughness of the strip steel Can not meet user requirements.
  • the strip 6 enters the strip surface treatment unit 1, and the surface treatment unit 1 is provided with a plurality of sets of high-pressure injection devices 1-1 or centrifugal sprinkling devices 1-2 along the strip forward direction according to the unit production line speed and product requirements.
  • Multiple sets of the above devices may also be provided along the width of the strip, and the mixture of solid abrasive and water sprayed from the high pressure spray device 1-1 or the centrifugal spray device 1-2 will uniformly impact on the strip surface, strip steel Under the impact of the solid abrasive, a series of pits are formed on the surface to achieve the purpose of controlling the surface roughness.
  • the mechanical properties of the strip change, and the yielding platform disappears to meet the stamping and forming. Process requirements to completely or partially replace the function of the leveling process.
  • the steel sheet surface treatment method according to the present invention is characterized in that a mixture of solid particles and water for impacting the surface of the steel strip is mixed in a ratio of 10 to 95%, and the solid abrasive can be iron sand, steel shot, steel wire cut pellet Etc., the particle size of the solid particles is between 20 mesh and 100 mesh, preferably 60 to 80 mesh.
  • a method for surface treatment of a steel sheet according to the present invention characterized in that the solid for impacting the surface of the steel strip
  • the mixing ratio of the body particles and water is preferably 10 to 30%.
  • a plurality of sets of high-pressure injection devices 1-1 or centrifugal squirting devices 1-2 are arranged, and the high-pressure injection device 1-1 drives the solid abrasive impact strips by a certain pressure of high-pressure water.
  • the surface, the centrifugal ejector device 1-2 impacts the surface of the steel strip by a method of high-speed cutting out a certain mixing ratio of the slurry by the impeller, and each group of high-pressure injection device 1-1 or centrifugal blasting device 1-2 can set different impact energy. And speed.
  • the injection speed or energy of the high-pressure injection device 1-1 or the centrifugal squirting device 1-2, the mixing ratio of the sprayed slurry, the abrasive grain size, and the like are determined according to the strength of the steel strip to be processed, the operating speed of the unit, and the user's requirements. The roughness and other factors are determined.
  • each set of spray devices is arranged along the width direction of the plate, and each set of spray devices can cover a strip width of 50 to 100 mm and a strip width of 700 to 1400 mm.
  • the centrifugal projection device 1-2 it is preferable that 2 to 8 rows of high-pressure injection devices 1-1 are arranged along the advancing direction of the strip, and the number of the high-pressure injection devices 1-1 can be increased or decreased according to the running speed of the unit, for the centrifugal projection device 1-2, in the width direction of the plate.
  • 1 ⁇ 2 sets of centrifugal squirting device 1-2 are arranged on the whole, and the full-plate width is covered according to the adjustment of the slanting angle.
  • the centrifugal slinging device 1-2 is also arranged in the forward direction of the strip 2 ⁇ 8 sets.
  • the steel sheet surface treatment method according to the present invention is characterized in that, in the strip surface treatment unit 1 of the invention, the high pressure injection device 1-1 or the centrifugal splatter device 1-2 may be separately arranged, or the high pressure injection may be mixedly arranged.
  • the apparatus 1-1 or the centrifugal ejector 1-2 preferably uses a centrifugal squirting device 1-2 for the injection of the central portion of the strip, and a high-pressure blasting device 1-1 for the injection of the strip rim portion.
  • the steel sheet surface treatment method according to the present invention is characterized in that the slurry supply device 4 supplies the respective high-pressure injection devices 1-1 or the centrifugal projection devices 1-2 with slurry of different solid particle size abrasives and mixing ratios.
  • the steel sheet surface treatment method according to the present invention is characterized in that the solid abrasive is recycled by the filtration recovery device 5.
  • the steel sheet surface treatment method according to the present invention is characterized in that the strip surface treatment unit 2 uses pure water to rinse the surface of the strip, the pure water pressure is 5 to 30 MPa, and the hot air is used in the strip surface drying unit 3. Dry the strip surface.
  • the steel sheet surface treatment method according to the present invention is characterized in that the impact speed of the solid abrasive and water impinging on the surface of the steel strip is in the range of 30 m/s to 300 m/s.
  • the steel sheet surface treatment method according to the present invention is characterized in that the impact speed of the solid abrasive and water impinging on the surface of the steel strip is between 40 and 80 m/s.
  • the steel sheet surface treating method according to the present invention is characterized in that the present invention can be carried out in a separate degreasing unit.
  • the steel sheet surface treatment method according to the present invention is characterized in that the present invention can be carried out before the annealing furnace and the inlet loop of the continuous annealing machine.
  • the steel sheet surface treatment method according to the present invention is characterized in that the present invention can be carried out before the annealing furnace of the hot dip galvanizing unit.
  • the steel sheet surface treatment method according to the present invention is characterized in that the present invention can be carried out before the plating tank after the electrogalvanizing unit inlet looper.
  • the invention can be carried out downstream of the leveling unit.
  • the present invention can be arranged downstream of a leveling process in a finishing process with a continuous annealing unit and a leveling unit to precisely control the surface roughness of the strip, the annealing unit including heat Processes such as galvanizing, electrogalvanizing, and continuous annealing are shown in Figure 8.
  • the present invention can be disposed in a finishing process with a continuous annealing unit to replace the function of the original leveling process, that is, to improve the mechanical properties of the strip by the method of impacting the steel surface in the present invention. Control the surface roughness as shown in Figure 9.
  • the technical solution of the steel sheet surface treatment apparatus of the present invention is as follows: Steel plate surface treatment device, characterized in that
  • At least one strip surface treatment unit 1 equipped with a high pressure injection device 1-1 or a centrifugal spray device 1-2, a strip surface cleaning unit 2 located downstream of the device, and a strip surface drying downstream of the cleaning unit 2 Unit 3, abrasive supply device 4, abrasive recovery device 5.
  • the steel sheet surface treating apparatus is characterized in that the medium for impacting the surface of the steel strip is a mixture of solid particles and water, and the mixing ratio thereof is 10 to 95%, preferably 10 to 30%, and the solid abrasive can be used.
  • Iron sand, steel shot, steel wire cut pellet, etc., the particle size of the solid particles is between 20 mesh and 100 mesh, preferably 60 to 80 ⁇ .
  • a steel sheet surface treatment apparatus is characterized in that a plurality of sets of high-pressure injection devices 1-1 or centrifugal squirting devices 1-2 are arranged in the strip surface treatment unit 1 along the width direction of the plate, wherein the high-pressure injection devices 1 - 1 5-30 sets of high-pressure injection devices 1-1 can be arranged in the width direction of the plate.
  • Each group of high-pressure injection devices 1-1 can cover a strip with a width of 50 ⁇ 100mm and a strip width of 700 ⁇ 1400mm.
  • 2 to 8 rows of high pressure injection devices 1-1 are arranged in the forward direction of the strip.
  • 1 ⁇ 2 sets are arranged in the width direction of the strip, and the full-width spray is covered according to the adjustment of the splay angle, and the 2 ⁇ 8-row centrifugal squirting device 1 is also arranged in the forward direction of the strip. -2.
  • the steel sheet surface treating apparatus according to the present invention is characterized in that the present invention can be disposed in a separate degreasing unit.
  • the device can be placed before the annealing furnace and inlet loop of the continuous annealing unit.
  • the apparatus may be disposed before the annealing furnace of the hot dip galvanizing unit.
  • the apparatus may be disposed before the plating tank after the electrogalvanizing unit inlet looper.
  • the apparatus instead of the degreasing, pickling, and the like processes in the conventional electroplating process, as shown in FIG.
  • the apparatus may be disposed downstream of the leveling unit.
  • the surface roughness of the strip after flattening can not meet the user's requirements
  • the roughness control process the surface roughness of the steel plate is precisely controlled, which is especially suitable for the high strength of the strip steel.
  • the roughness of the strip steel cannot meet the requirements of the user through the leveling process. The situation is shown in Figure 7.
  • the apparatus may be disposed downstream of the leveling process in the finishing process with the continuous annealing unit and the leveling unit.
  • the annealing unit includes hot-dip galvanizing, electro-galvanizing, continuous annealing and the like, as shown in FIG.
  • the apparatus can be disposed in a finishing process with a continuous annealing unit.
  • the method of impacting the surface of the steel strip in the present invention improves the mechanical properties of the strip and controls the surface roughness, as shown in Fig. 9.
  • the surface roughness of the strip in the present invention is determined by factors such as the particle size, the injection distance, the injection pressure and the like of the abrasive particles sprayed on the surface of the strip.
  • the above related parameters can be flexibly controlled according to the user's demand for roughness, and the control belt can be conveniently controlled online.
  • Steel surface roughness Especially for the steel strip with higher strength, the method of the invention can solve the traditional production process, the surface roughness of the strip is limited by the rolling and leveling process, the material of the roll and the like, so that the roughness of the strip is difficult to reach. User requested questions;
  • the method of spraying the mixed abrasive onto the surface of the strip steel to remove the grease, iron oxide scale and the like on the surface of the strip steel can partially or completely replace the strip pretreatment process in the traditional process, and reduce the industrial waste alkali. Emissions, reducing the length of the equipment process section, reducing energy consumption;
  • the surface condition of the strip entering the strip pretreatment process section is various.
  • the degree of bonding between the surface of the strip steel and the surface of the strip is different, the contents of the surface of the strip are different, and even some strips are subject to process problems. Need to be placed for a long time before entering the surface pretreatment process, so that when using traditional processes, it is often The debris on the surface of the strip can not be completely removed.
  • the surface of the strip is not left with various impurities, and the surface quality of the strip is ensured;
  • the mechanical properties of the strip steel are tempered by impact energy and impact velocity on the surface of the strip steel, which is not limited by the capacity of the flat machine to press the system equipment and the strength of the strip steel, and the conventional flatness is solved.
  • the problem of insufficient process equipment capacity, and flexible improvement of the mechanical properties of the strip steel according to the use of strip steel; performance, can replace the leveling process, the overall process cost is greatly reduced
  • the invention can be disposed in a continuous hot-dip galvanizing production line, a continuous electro-galvanizing production line, a continuous annealing production line, and a continuous degreasing production process, and the surface pre-treatment of the steel strip entering the above process can also be set in the finishing of the above-mentioned production line.
  • the function of the original leveling process is completely or partially replaced, and can be flexibly configured according to the product and process requirements;
  • Solid abrasives can be recycled and used at a lower cost
  • the medium of the surface of the impact strip in the present invention is a mixture of solid particles and water, and has no special requirements on the surface state of the strip to be treated, and is simple in operation and low in maintenance cost.
  • Figure 1 is a schematic view of a strip surface treatment device 1
  • Figure 2 is a schematic view of the strip surface treatment device 2
  • FIG. 3 is a schematic view showing a pretreatment process of a strip surface according to Embodiment 1;
  • FIG. 4 is a schematic view showing a surface pretreatment process of the strip steel of Embodiment 2;
  • Figure 5 is a schematic view showing the surface pretreatment process of the strip steel of Embodiment 3.
  • FIG. 6 is a schematic view showing a surface pretreatment process of the strip steel of Embodiment 4.
  • FIG. 7 is a schematic view showing a surface pretreatment process of the strip steel of Embodiment 5;
  • FIG. 8 is a schematic view showing a pretreatment process of a strip surface according to Embodiment 6;
  • FIG. 9 is a schematic view showing a pretreatment process of a strip surface according to Embodiment 7.
  • Figure 10 is a surface roughness distribution of the strip under the embodiment 1;
  • Fig. 11 is a comparison diagram showing changes in mechanical properties of the strip steel in the seventh embodiment.
  • 1 is a strip surface treatment unit
  • 1-1 is a high pressure injection device
  • 1-2 is a centrifugal spray device
  • 2 is a strip surface cleaning unit
  • 3 is a strip surface drying unit
  • 4 is a slurry supply Unit
  • 5 is abrasive recovery unit
  • 6 is strip steel
  • 7 is uncoiler
  • 8 is welder
  • 9 is coiler
  • 11 is annealing outlet looper
  • 10 is inlet looper
  • 12 is annealing furnace
  • 13 is flat
  • 14 is the annealing unit
  • 15 zinc pot the specific embodiment
  • the strip steel in this embodiment is a cold rolled strip steel having a width of 700 to 1300 mm and a thickness of 0.2 to 3 mm.
  • the surface of the strip remains with various dirt generated during the rolling process, including the slag in the rolling oil and the rolling oil, the iron powder generated during the cold rolling, the accumulated dust, and the welding process. Welding slag, etc.
  • the surface roughness of the strip after cold rolling is 0.7 ⁇ 0.8 ⁇ m, and the surface roughness of the user is 1.5 ⁇ m.
  • the strip steel 6 is unwound by the unwinder 7 and then welded by the welder 8, and then passes through a tension roller to enter the steel sheet surface treatment apparatus 1.
  • the steel sheet pretreatment apparatus 1 can be configured with a high pressure injection apparatus 1-1 as shown in Fig. 1 or centrifuged.
  • the blasting device 1-2 when the high-pressure spraying device 1-1 is used, the solid abrasive grain size is 80-100 mesh steel shot, the steel shot and the water are controlled at a level of 50%, and the mixture of steel shot and water impacts.
  • the speed on the strip surface is 70 ⁇ 90m/min.
  • the solid abrasive grain size is 80-100 mesh steel shot, and the mixing ratio of the steel shot and the water is 70%, and the mixture of the steel shot and the water impacts on the surface of the strip steel.
  • the speed is 70 ⁇ 90m/min.
  • the dirt on the surface of the strip thus treated is subjected to the action of solid abrasive and water, and the surface of the strip is separated by the suspension, thereby achieving the purpose of cleaning the surface of the strip.
  • the surface of the strip is formed into small pits which are disorderly arranged, thereby achieving the control of the surface roughness of the strip. purpose.
  • the surface roughness of the strip thus treated reaches 1.4 to 1.5 ⁇ ⁇ .
  • the solid particles were not left in the surface of the strip thus treated, and then dried by hot air of 100 ° C in the strip surface drying unit 3, and then taken up by a coiler 9.
  • the roughness of the surface of the strip thus treated is distributed along the width direction of the sheet as shown in FIG.
  • the strip steel in this embodiment is a cold rolled strip steel having a width of 700 to 1300 mm and a thickness of 0.2 to 3 mm.
  • the surface of the strip remains with various dirt generated during the rolling process, including the slag in the rolling oil and the rolling oil, the iron powder generated during the cold rolling, the accumulated dust, and the welding process. Welding slag, etc.
  • the surface roughness of the strip after cold rolling is 0.7 ⁇ 0.8 ⁇ m, and the surface roughness of the user is 1.5 ⁇ m.
  • the strip 6 is unwound by the unwinder 7 and then welded by the welder 8, and then enters the steel sheet surface treatment apparatus 1.
  • the process in the steel sheet surface treatment apparatus is the same as in the first embodiment, and the strip thus treated enters the inlet loop 10 and passes through
  • the annealing furnace 12 is subjected to annealing treatment, and then subjected to flattening and tensioning treatment, and finally coiled by the coiler 9, thereby completing the entire annealing process.
  • the welder 8 enters the inlet loop 10 and then enters the steel sheet surface treatment apparatus 1.
  • the surface treatment process of the strip in the steel sheet pretreatment apparatus 1 is similar to that of the embodiment 1, and the steel sheet is passed through the steel sheet.
  • hot-dip galvanizing is performed to complete the entire hot-dip galvanizing process.
  • the welder 8 enters the inlet looper 10 and then enters the steel sheet surface treatment apparatus 1.
  • the surface treatment process of the strip in the steel sheet surface treatment apparatus 1 is similar to that of the embodiment 1, and the steel sheet is passed through the steel sheet. After the treated strip of the surface treatment device 1 is subjected to subsequent electroplating, phosphating, coating, etc., the entire electroplating process is completed.
  • a cold-rolled steel sheet having a thickness of 0.3 to 0.8 mm and a width of 800 to 1200 mm is used, and the elongation at the time of flattening is 0.8%, and the smoothing machine uses a baton, and the required roughness of the strip is 1.5 ⁇ ⁇ .
  • the strip steel 6 is unwound by the unwinder 7 and then passed through a tension roller into the leveling machine 13, and the leveling machine flattens the steel sheet with an elongation of 0.8%, thereby improving the mechanical properties of the strip and improving it.
  • the steel strip enters the strip surface treatment unit 1 through a tension roller, and the strip surface treatment unit 1 is provided with an abrasive supply device 4, wherein the solid abrasive of the device 4 is made of steel pellets having a particle size of 60 mesh, solid
  • the mixing ratio of the abrasive to the water is 70%, and the abrasive supply device 4 supplies the slurry of the above mixing ratio to the high pressure injection device 1-1, and the high pressure injection device 1-1 supplies energy to the slurry to make the slurry 120 m/s.
  • the impact velocity impacts on the strip surface.
  • the strip flushing unit rinses the upper and lower surfaces of the strip with 20Mpa of pure water to remove solid particles remaining on the strip surface.
  • the strip enters the drying device 3, and the drying device 3 dries the steel sheet with a high temperature gas of 100 °C to meet the requirements of the next process such as winding.
  • the coiler 9 completes the crimping.
  • the mixing ratio of the solid abrasive to the water is
  • the centrifugal spray device 1-2 provides impact energy to the slurry through the impeller, the velocity at the surface of the strip is 120 m/s, and the impact density per unit area is 2 kg/m 2 .
  • the other steps are similar to the above.
  • the process layout 8 of the method of the invention is added after the leveling process of the continuous annealing process as an example. Referring to FIG. 1 and FIG. 2, the specific embodiment is as follows:
  • a cold-rolled steel sheet having a thickness of 0.3 to 0.8 mm and a width of 800 to 1200 mm is used, and the elongation at the time of flattening is 0.6%, and the smoothing machine uses a baton, and the required roughness of the strip is 1.2 ⁇ ⁇ .
  • the strip 6 enters the steel sheet shearing and welding unit 8 after being unwound by the unwinder 7, and then enters the continuous annealing unit 14 through the annealing inlet loop 10, and the yielding platform exists in the mechanical properties of the strip thus treated, which affects the forming of the strip.
  • the annealed strip After the annealed strip is subjected to the annealing outlet looper, it enters the leveling unit 13.
  • the flattening unit is provided with tensioning devices before and after the leveling unit, and the leveling process flattens the steel sheet with an elongation of 0.6%, thereby eliminating the yielding platform of the strip after annealing. And the strip shape is improved, and the stripped steel strip enters the steel sheet surface treatment unit 1.
  • the abrasive is made of 80 mesh steel shots.
  • the mixing ratio of the solid particles to the water is 60%, the speed at which the slurry impacts the steel strip is 100 m/s; when the centrifugal coating device 1-2 shown in Fig. 2 is disposed in the surface treatment unit 1 of the steel sheet, the solid abrasive is used in the particle size
  • the mixing ratio of the solid particles to water is 50%, and the speed at which the slurry impacts the strip is 100 m/s.
  • the strip steel thus treated enters the strip cleaning device 2 and the strip drying device 3, and the treatment process in the cleaning device 2 and the drying device 3 is the same as in the fifth embodiment, and then enters the straightening unit via the tension roller group, and the strip steel plate The shape is further improved, and then the reeling machine 9 completes the curling.
  • the process layout diagram 9 in which the method of the invention is added after the leveling process of the continuous annealing process is taken as an example. Referring to FIG. 1 and FIG. 2, the specific embodiment is as follows:
  • a cold-rolled steel sheet having a thickness of 0.3 to 0.8 mm and a width of 800 to 1200 mm is used, and the required roughness of the strip is 1.2 ⁇ ⁇ .
  • the steel strip is first sheared and welded 8 and then passed through the annealing inlet looper 10 into the annealing unit 14, and then directly enters the strip surface treatment unit 1 through the annealing outlet looper 11, strip steel punching
  • the front surface of the surface treatment unit is provided with a tension roller set.
  • the strip surface treatment unit 1 is provided with a plurality of sets of high pressure injection devices 1-1. After the strip enters the device 1-1, the first and second sets of high pressure injection devices 1-1 are first.
  • the surface of the strip is sprayed.
  • the impact abrasive has a particle size of 30 mesh, the slurry mixing ratio is 70%, and the impact speed of the impact strip is 150 m/s.
  • the strip enters the third and fourth sets of high-pressure injection devices.
  • the slurry has a particle size of 80 mesh, the mixing ratio is 60%, and the impact velocity of the impact on the strip surface is 100 m/s. .
  • the surface roughness of the strip has reached the roughness required by the user, and the subsequent strip enters the surface cleaning device 2, and the surface cleaning device rinses the upper and lower surfaces of the strip with 20 Mpa of pure water, after which the strip enters the strip.
  • Drying unit 3 100 in the drying unit.
  • the high temperature compressed gas is used to dry the strip surface to meet the requirements of coiling and other processes.
  • the embodiment thereof is similar to the above, but the impact velocity of the slurry sprayed by the first and second groups of centrifugal blasting devices 1-2 is 150 m/s, and the solid is solid.
  • the particle size of the abrasive is 30 mesh, and the mixing ratio of the solid particles to water is 60%.
  • the speed of the impact of the abrasive belt on the surface of the third and fourth sets of centrifugal spray device is 100 m/s, the grain size of the abrasive is 80 mesh, and the mixing ratio is 60%. .
  • the strip steel is flexibly controlled by a method of impacting the solid mixed abrasive on the surface of the strip.
  • the grease remaining on the surface of the strip, the scale of the scale, etc. can also completely or partially replace the effect of the leveling process.
  • this patent can solve the problem that the roughness of the strip cannot be improved due to insufficient equipment capacity in the production of high-strength steel, and has a high promotion value for product expansion and product quality improvement. Therefore, the invention has broad application prospects in the field of surface treatment of steel sheets.

Abstract

一种钢板表面处理方法，顺序包括一个配置有高压喷射装置（1-1）或离心甩射装置（1-2）的带钢表面处理单元（1）、带钢表面清洗单元（2）及带钢表面烘干单元（3），所述高压喷射装置或离心甩射装置可单独布置也可混合布置，对带钢表面喷射浆料，即固体磨料和水的混合物，还包括浆料供给单元（4），及磨料过滤回收单元（5）。还公开了一种钢板表面处理装置。上述处理方法通过将固体混合磨料冲击在带钢表面的方法，控制带钢表面粗糙度的同时，清除带钢表面的油脂、氧化铁皮和一些脏物，完全或部分代替平整工艺功能。

Description

一种钢板表面处理方法及其装置 技术领域
本发明属于冷轧后钢板后处理线的技术领域，具体地，本发明涉及一种钢板表 面处理方法及其装置，所述钢板表面处理方法及其装置主要是通过高压喷射装置或 离心甩射装置将一定比例的水和固体颗粒的混合物冲击在带钢表面，一方面给带钢 表面赋予一定粗糙度的同时， 清除带钢表面的油脂、 氧化铁皮和一些脏物， 另夕卜， 通过冲击带钢表面的方法， 调制带钢力学性能， 完全或部分代替平整工艺的功能。 背景技术
带钢经冷轧机轧制成一定厚度之后，根据产品需求，需要进入到不同的后处理 工艺，如热镀锌产品需要进入连续连镀锌机组， 电镀锌产品需要经连续退火后进入 到连续电镀锌机组， 而普冷产品可经过连续退火工艺后直接形成冷轧产品，也可通 过罩式退火工艺。对连续热镀锌或电镀锌等带钢镀层工艺来说，其表面状态和清洁 程度是确保连退镀层质量的先决条件，但带钢在轧制过程中，表面难免残留各种杂 物， 如轧制油中的渣滓、 冷轧过程中残生的铁粉、 积聚的灰尘、 头部焊接时产生的 焊渣等。
因此， 带钢连退之前必须经过清洁， 以彻底除去带钢表面油污。 否则表面残留 的各种油类等在退火过程中将形成碳质污斑， 污染炉内气氛， 影响脱碳效率， 甚至 引起增碳现象。 此外， 油污也会使带钢表面质量变化和引起炉底辊结瘤， 造成带钢 表面划伤等缺陷。
为此， 在连续镀层机组上在退火之前均设置清洗工艺， 也叫脱脂工艺， 其目的 是清除带钢表面残留的各种杂物。
对经连续退火工艺后直接形成冷轧产品的连退工艺来说，其来料带钢表面的清 洁状态直接决定最终产品表面质量， 为此， 在连退工艺入口段设置碱洗、 刷洗、 电 解清洗、 热水漂洗等表面预处理工艺， 从而确保进入连退工艺的带钢表面质量。 同 样， 在罩式退火工艺中， 为确保进入退火工艺之前的带钢表面质量， 在罩式退火之 前设置专门的脱脂装置。 然而， 在实际生产过程中， 经常出现带钢表面的脏物不能彻底清除干净， 导致 带钢经退火或镀层之后， 表面上出现斑迹、 条紋、 涂层不均等现象， 影响产品表面 质量。 为此， 现场技术人员从调整碱喷洗工艺、 刷洗工艺、 脱脂剂、 碱液浓度及温 度等工艺方面进行了大量的调整优化， 但因为带钢表面的脏物具有多样性及复杂 性， 如不同带钢表面的脏物成分不一致、 带钢表面的脏物与带钢的结合力不一致， 再加上带钢运行速度较快，导致生产中还是会发生带钢表面脏物不能彻底清除干净 的现象。
另一方面， 为满足用户对粗糙度的要求及后道镀层工艺的要求，冷轧后带钢表 面需要达到一定粗糙度，但因轧制工艺及轧辊的限制，冷轧后带钢表面粗糙度经常 不能达到要求。特别是生产强度较高的高强钢时， 即使是轧机粗糙度控制能力达到 极限， 其带钢表面粗糙度也不能达标。
为此， 需要冷轧后道工序中控制带钢粗糙度，但冷轧后道工序中仅有平整机才 能控制带钢粗糙度。 然而， 平整过程中的粗糙度控制也存在很多问题， 如
1 ) 平整过程中工作辊粗糙度对带钢表面粗糙度的影响最大， 工作辊在上机之 前均要激光毛化、 电火化毛化、 抛丸等处理， 使工作辊表面具有一定粗糙度。 在工 作辊上线初期，其辊面粗糙度是决定带钢表面粗糙度的关键因素，但随着轧制里程 数的增加， 轧辊表面粗糙度下降， 使带钢表面粗糙度无法达到用户要求；
2 ) 平整过程中可控制带钢粗糙度的手段只有控制轧辊粗糙度一种方法， 实际 生产中发现成品粗糙度达不到要求时只能更换轧辊， 无法在生产中灵活控制粗糙 度；
3 ) 随着高强钢需求的增大， 带钢的强度也越来越高， 当带钢强度达到一定级 别之后， 已无法通过平整机达到用户所需的粗糙度值， 即使是在工作辊刚上线时也 无法达到要求。
因此急需要能控制带钢表面粗糙度的工艺及装备的开发。
针对以上轧后带钢表面预处理及粗糙度方面的问题，国内外均进行了大量的研 究，如针对带钢表面预处理方面国外开发了一种高密度电流脱脂清洗技术，其原理 为以碱性脱脂液为导电介质， 在带钢表面形成 200A/d m2左右的高密度电流， 使带 钢表面瞬间产生大量气泡， 爆破带钢表面油污层， 从而清洗带钢。 该技术虽然可以 使用高速生产要求， 但是其电能消耗为传统工艺的 10倍以上， 其造价高， 设备精 密， 维护成本较高。 国内专利 CN102357541 A公开了一种热水循环清洗带钢表面 的方法及其系统， 其原理是带钢进入碱刷洗之前， 先利用以 8~12Mpa压力的热水 喷洗带钢上下表面， 热水温度为 40~70°C , 从而减少后续碱刷洗及电解工序段的设 备组合数量及能耗。该方法作为传统脱脂工艺的改进方法， 利用热水喷洗的方法可 以清洗与带钢表面结合力较弱的杂物，但对与带钢紧密结合的杂物、 陷于带钢凹层 里的杂物也不能完全清洗。 国内专利 CN 201217016 Y公开了带钢表面清洗加工的 超声波处理装置，其原理是将带钢表面清洗和超声波处理结合起来，在带钢碱洗（酸 洗）或电解碱洗（酸洗）槽中加装超声波发生装置， 实现对带钢表面的清洗和清洁 处理。 该方法也作为传统脱脂工艺的改进方法， 对碱液的流动有所改进， 即对带钢 表面油膜的去除有较大效果，但对与带钢紧密结合的杂物还是不能彻底不能实现清 除。 国内专利 CN101537431A介绍一种薄带钢表面粗糙度在线预测和控制方法， 其特点是通过平整机工作辊粗糙度数据及带钢长度、不同带钢长度段内的轧制力和 延伸率计算出带钢不同长度段内的粗糙度值，当带钢粗糙度目标值不在预测范围内 时调整轧制力及延伸率的方法来预测和控制带钢粗糙度。该方法只能减少带钢粗糙 度误差， 无法根本解决传统工艺中存在的粗糙度不能达标的问题。 专利 CN1804739A介绍一种平整机成品板面粗糙度预报及控制技术，其特点与上述专利 相仿，主要是通过建立轧辊粗糙度、轧制公里数之间的数学模型以及压下率与遗传 率之间的数学关系， 并根据现场数据建立平整机在线预报成品粗糙度模型，预测和 控制带钢表面粗糙度。 同样该方法只能减少带钢粗糙度误差，无法根本解决传统工 艺中存在的粗糙度不能达标的问题。
专利 CN 101675184 A公开了一种钢板的清洗方法及钢板的连续清洗装置， 其 原理是通过喷淋方式或帘幕方式将频率为 0.8MHz~3MHz 的超声波清洗液以相对 于钢板表面呈直角的线向与移动方向相反的方向倾斜 1 ~80° 的角度供给到钢板表 面，由此能够将高频超声波用于对移动钢板的表面清洗，提高清洗效果及清洗速度。 该方法利用超声波在钢板表面发生的空化现象，强化清洗的化学反应，提供冲击力， 促进清洗效果，但同样对与带钢紧密结合的杂物不能完全清除干净。针对带钢表面 粗糙度控制方面， 日本申请人的专利 CN1622869A介绍了一种金属钢板表面处理 设备和金属板的制造方法， 其特点是向连续输送的金属板上投射平均粒径为 300 μ m以下的固体颗粒的方法控制钢板表面粗糙度，该发明主要由配置有投射装置的投 射室、设在此投射室下游的清洁金属板表面的清洁装置组成，具体是首先金属板进 入投射室，投射室中的投射装置将干燥固体颗粒冲击在带钢表面，投射室下游的清 洁室利用空气喷嘴将金属板表面的固体颗粒清洗。该发明中用于冲击带钢表面的介 质为干燥的固体颗粒，这将导致为了保持固体颗粒的流动性， 需要在进入投射室的 金属板为干燥的， 因此， 需要在投射室上有设置钢板清洗和干燥设备， 导致机组复 杂。 而且， 在整个投射和清洗工艺中不能有任何液体进入到机组内， 这对设备的密 封等方面均提出了很高的要求， 实际生产中很难达到。 另外， 固体颗粒是直接冲击 在金属板表面上的， 因固体颗粒的粒度比金属板的粒度要大，故金属颗粒很容易嵌 入到金属板表面上，通过该发明中的空气喷射的方法无法达到彻底清除带钢表面固 体颗粒的目的。 发明内容
为克服上述问题，本发明的目的是，提供一种可对冷轧后钢板表面进行处理的 新型工艺。
为克服上述问题，本发明的目的是，提供一种可对冷轧后钢板表面进行处理的 新型装置。所述工艺及装置通过高压磨料喷射装置将一定比例的水和固体磨料混合 物冲击在钢板表面，从而给带钢表面赋予一定粗糙度，并清除残留带钢表面的上的 油脂、 氧化铁皮和一些脏物。
根据本发明，一方面实现轧后钢板表面粗糙度的灵活控制，特别是针对强度较 高的高强钢赋予用户所需的粗糙度，解决生产高强钢时带钢表面粗糙度因轧制工艺 及轧辊材质的限制， 其粗糙度不能达标的问题。 同时， 另一方面， 通过向钢板表面 喷射混合磨料的方法， 清除轧后带钢表面残留的油脂、 氧化铁皮和一些脏物， 减少 带钢表面预处理段的负荷及其设备段长度， 并提高带钢表面清洗程度。
另外，通过在精整机工艺上设置本发明所述装置及工艺， 利用固体磨料及水的 混合物冲击带钢表面的方法来调制带钢力学性能，从而完全或部分代替平整机的功 έ f]匕 本发明的钢板表面处理方法设置在连续热镀锌生产线、连续电镀锌生产线、连 续退火生产线、连续脱脂生产线的入口段时， 利用将固体混合磨料冲击在带钢表面 的方法， 在线灵活控制带钢表面粗糙度的同时， 清除残留在带钢表面的油脂、 氧化 铁皮等脏物，从而对冷轧后钢板表面进行处理。本发明的钢板处理方法设置在精整 处理线时，通过将固体混合磨料冲击在带钢表面的方法，控制带钢表面粗糙度的同 时， 改善带钢力学性能， 完全或部分代替平整工艺功能。
本发明的技术方案如下：
一种钢板表面处理方法， 其特征在于，
所述钢板表面处理方法顺序包括：
一个配置有高压喷射装置 1-1或离心甩射装置 1-2的带钢表面处理单元 1 , 所述高压喷射装置 1-1或离心甩射装置 1-2可单独布置， 也可混合布置， 所述高压喷射装置 1-1或离心甩射装置 1-2对带钢表面喷射固体磨料和水的混 合物， 即浆料，
带钢表面清洗单元 2,
带钢表面烘干单元 3,
另外， 所述钢板表面处理方法包括：
对配置有高压喷射装置 1-1或离心甩射装置 1-2的带钢表面处理单元 1供给浆 料的浆料供给单元 4, 及磨料回收单元 5。 本发明应用于实际生产线时的装置参考图 3~图 9。
本发明应用于冷轧带钢后处理生产线入口段时的详细解释为：经冷轧后的带钢 6进入到带钢表面处理装置 1 , 此时， 带钢表面残留各种脏物， 包括轧制油及轧制 油中的渣质、 冷轧过程中产生的铁粉、 积聚的灰尘、 焊接过程中产生的焊渣等。 为 保证厚道工序及产品表面质量要求， 上述脏物必须彻底清除。 另外， 经轧制后的带 钢表面粗糙度还不能满足用户对产品表面粗糙度的要求。带钢表面预处理装置中根 据机组产线速度及产品要求，沿着带钢前进方向设置多组高压喷射装置 1-1或离心 甩射装置 1-2, 沿着带钢宽度方向也可设置多组上述装置， 从高压喷射装置 1-1或 离心甩射装置 1-2中喷射的固体磨料和水的混合物将均匀的冲击在带钢表面上，此 时， 原来粘附在带钢表面上的脏物在固体磨料与水的冲击作用下， 与带钢分离， 并 被水带离带钢表面， 从而达到清除带钢表面脏物的目的。 另外， 冲击在带钢表面上 的固体磨料具有一定速度和能量， 在这种能量和速度下， 固体磨料冲击带钢表面， 因固体磨料的硬度比带钢的硬度要大，使得固体磨料冲击在带钢表面时， 带钢表面 产生一些塑性变形及弹性变形， 经固体磨料弹出后， 带钢表面上会形成一系列随机 排列的小凹坑， 从而达到控制带钢表面粗糙度的目的。带钢表面粗糙度的大小有带 钢移动速度、冲击在带钢表面的固体磨料的速度和能量等因素决定，可根据产品需 求灵活配置。 经如此处理后的带钢， 其表面已不存在或少量存在一些脏物， 并且带 钢表面粗糙度已满足下道工序的要求，经喷射后的磨料及水的混合物堆积在带钢表 面处理单元 1下部，经过磨料过量回收装置 5处理之后再循环输送到磨料供给装置 4中。 如此， 经带钢表面处理单元 1后的带钢， 残留一定量的磨料， 为此通过设置 在带钢表面处理单元 1下游的带钢表面清洗单元 2中对带钢表面进行冲洗，带钢表 面清洗单元 2中以一定压力的纯水对带钢表面进行冲洗，经冲洗后的带钢表面没有 残留固体颗粒， 后经带钢表面烘干单元 3中进行烘干之后， 进入到下道工序。
本发明应用于冷轧带钢后处理生产线精整段时的详细解释为：经冷轧带钢热处 理或表面镀层处理处理之后带钢进入到表面处理方法段，此时， 带钢表面的粗糙度 不能满足用户要求。 带钢 6进入带钢表面处理单元 1中，表面处理单元 1中根据机 组产线速度及产品要求，沿着带钢前进方向设置多组高压喷射装置 1-1或离心甩射 装置 1-2, 沿着带钢宽度方向也可设置多组上述装置， 从高压喷射装置 1-1或离心 甩射装置 1-2中喷射的固体磨料和水的混合物将均匀的冲击在带钢表面上，带钢表 面在固体磨料的冲击下，表面上产生一系列凹坑，从而达到控制表面粗糙度的目的。 另夕卜， 针对已经过退火处理的带钢， 当浆料冲击能量和速度达到一定水平之后， 在 其浆料的冲击作用下， 带钢力学性能发生变化， 屈服平台消失， 以满足冲压成型等 工艺要求， 从而完全或部分替代平整工序的功能。
根据本发明所述钢板表面处理方法，其特征在于，其中用于冲击带钢表面的固 体颗粒和水的混合物， 其混合比例在 10~95%, 固体磨料可采用铁砂、 钢丸、 钢丝 切丸等， 固体颗粒的粒度采用 20目至 100目之间， 优选选用 60~80目。
根据本发明所述钢板表面处理方法，其特征在于，其中用于冲击带钢表面的固 体颗粒和水的混合物， 其混合比例优选选用 10~30%。
所述本发明中带钢表面处理单元 1中布置有多组高压喷射装置 1-1或离心甩射 装置 1-2,高压喷射装置 1-1是通过一定压力的高压水带动固体磨料冲击带钢表面， 离心甩射装置 1-2通过叶轮将一定混合比例的浆料高速甩出的方法冲击带钢表面， 各组高压喷射装置 1-1或离心甩射装置 1-2可设置不同的冲击能量和速度。
所述本发明中， 高压喷射装置 1-1或离心甩射装置 1-2的喷射速度或能量以及 喷射浆料的混合比、磨料粒度等根据所要处理的带钢强度和机组运行速度、用户要 求的粗糙度等因素决定。
才艮据本发明所述钢板表面处理方法， 其特征在于，
所述发明中带钢表面处理单元 1中沿着板宽度方向布置 5~30组高压喷射喷射 装置， 每组喷射装置可覆盖带钢宽度为 50~100mm, 带钢宽度为 700~1400mm。
另外， 优选的是， 沿着带钢前进方向也布置有 2~8排高压喷射装置 1-1 , 可根 据机组运行速度增加或减少其数量， 针对离心甩射装置 1-2, 在板宽度方向上布置 1~2组离心甩射装置 1-2, 根据甩射角度的调整覆盖全板宽的喷射， 同样离心甩射 装置 1-2也在带钢前进方向布置 2~8组。
根据本发明所述钢板表面处理方法，其特征在于，所述发明中带钢表面处理单 元 1中， 可单独布置高压喷射装置 1-1或离心甩射装置 1-2, 也可混合布置高压喷 射装置 1-1或离心甩射装置 1-2,对带钢中心部位的喷射优选选用离心甩射装置 1-2, 对带钢边部区域的喷射优选选用高压喷射装置 1-1。
根据本发明所述钢板表面处理方法，其特征在于， 带钢表面粗糙度控制范围在
0.5 μ m至 5 μ m。
根据本发明所述钢板表面处理方法，其特征在于，浆料供给装置 4可给各组高 压喷射装置 1-1或离心甩射装置 1-2供应不同固体颗粒粒度磨料和混合比的浆料。
根据本发明所述钢板表面处理方法，其特征在于，通过过滤回收装置 5实现固 体磨料的循环利用。
根据本发明所述钢板表面处理方法，其特征在于， 带钢表面处理单元 2中利用 纯水对带钢表面进行冲洗， 纯水压力在 5~30Mpa, 在带钢表面烘干单元 3 中利用 热风对带钢表面进行干燥。 根据本发明所述钢板表面处理方法，其特征在于， 冲击在带钢表面的固体磨料 和水的冲击速度在 30m/s~300m/s范围内。
根据本发明所述钢板表面处理方法，其特征在于， 冲击在带钢表面的固体磨料 和水的冲击速度在 40~80m/s之间。
才艮据本发明所述钢板表面处理方法，其特征在于，所述本发明可在单独的脱脂 机组中进行。
以代替原有机组中预清洗、 刷洗、 电解清洗、 漂洗等装置。 如图 3所示。 根据本发明所述钢板表面处理方法，其特征在于，所述本发明可在连续退火机 组的退火炉和入口活套之前进行。
以代替传统连退工艺中的碱洗、 刷洗、 电解清洗、 热水漂洗等工艺， 如图 4 所示。
根据本发明所述钢板表面处理方法，其特征在于，所述本发明可在热镀锌机组 的退火炉之前进行。
以代替传统热镀锌工艺中的清洗工艺， 如图 5所示。
根据本发明所述钢板表面处理方法，其特征在于，所述本发明可在电镀锌机组 入口活套之后的电镀槽之前进行。
以代替传统电镀锌工艺中的脱脂、 酸洗等工艺， 如图 6所示。
所述本发明可在平整机组下游进行。
以对平整后带钢表面粗糙度无法满足用户要求时，作为粗糙度控制工艺，对钢 板表面粗糙度进行精确控制，特别适用于带钢强度较高， 带钢粗糙度通过平整工艺 无法达到用户要求的情况， 图 7所示。
另夕卜， 根据本发明， 所述本发明可布置在带有连续退火机组、 平整机组的精整 工序中的平整工艺下游进行，对带钢表面粗糙度进行精确控制，所述退火机组包括 热镀锌、 电镀锌、 连续退火等工艺， 如图 8所示。
另外， 根据本发明， 所述本发明可布置在带有连续退火机组的精整工序中， 代 替原有平整工艺的功能，即通过本发明中的冲击带钢表面的方法改善带钢力学性能 并控制表面粗糙度， 如图 9所示。
本发明的钢板表面处理装置的技术方案如下： 一种钢板表面处理装置， 其特征在于，
至少包含一个配置有高压喷射装置 1-1或离心甩射装置 1-2的带钢表面处理单 元 1、 位于该装置下游的带钢表面清洗单元 2、 位于清洗单元 2下游的带钢表面烘 干单元 3、 磨料供给装置 4、 磨料回收装置 5。
本发明应用于实际生产线时的装置参考图 3~图 9。
根据本发明所述钢板表面处理装置，其特征在于，其中用于冲击带钢表面的介 质为固体颗粒和水的混合物， 其混合比例在 10~95%, 优选 10~30%, 固体磨料可 采用铁砂、钢丸、钢丝切丸等，固体颗粒的粒度采用 20目至 100目之间，优选 60~80 ϋ 。
根据本发明所述钢板表面处理装置，其特征在于， 带钢表面处理单元 1中沿着 板宽度方向布置多组高压喷射装置 1-1或离心甩射装置 1-2,其中高压喷射装置 1-1 在板宽度方向可布置 5-30组高压喷射装置 1-1 ,每组高压喷射装置 1-1可覆盖的带 钢宽度为 50~100mm, 带钢宽度为 700~1400mm。
在带钢前进方向布置 2~8排高压喷射装置 1-1。 针对离心甩射装置 1-2, 在带 钢宽度方向上布置 1~2组，根据甩射角度的调整覆盖全板宽的喷射， 同样在带钢前 进方向布置 2~8排离心甩射装置 1-2。
根据本发明所述钢板表面处理装置，其特征在于，所述本发明可布置在单独的 脱脂机组中。
由此， 代替原有机组中预清洗、 刷洗、 电解清洗、 漂洗等装置， 如图 3所示。 另外， 根据本发明所述钢板表面处理装置，
所述装置可布置在连续退火机组的退火炉和入口活套之前。
由此， 代替传统连退工艺中的碱洗、 刷洗、 电解清洗、 热水漂洗等工艺， 如图 4所示。
另夕卜，根据本发明所述钢板表面处理装置，所述装置可布置在热镀锌机组的退 火炉之前。
由此， 代替传统热镀锌工艺中的清洗工艺， 如图 5所示。
另夕卜，根据本发明所述钢板表面处理装置，所述装置可布置在电镀锌机组入口 活套之后的电镀槽之前。 由此， 代替传统电镀锌工艺中的脱脂、 酸洗等工艺， 如图 6所示。
另外， 根据本发明所述钢板表面处理装置， 所述装置可布置在平整机组下游。 对平整后带钢表面粗糙度无法满足用户要求时，作为粗糙度控制工艺，对钢板 表面粗糙度进行精确控制，特别适用于带钢强度较高， 带钢粗糙度通过平整工艺无 法达到用户要求的情况， 图 7所示。
根据本发明所述钢板表面处理装置，所述装置可布置在带有连续退火机组、平 整机组的精整工序中的平整工艺下游。
由此， 对带钢表面粗糙度进行精确控制， 所述退火机组包括热镀锌、 电镀锌、 连续退火等工艺， 如图 8所示。
根据本发明所述钢板表面处理装置，所述装置可布置在带有连续退火机组的精 整工序中。
由此，代替原有平整工艺的功能， 即通过本发明中的冲击带钢表面的方法改善 带钢力学性能并控制表面粗糙度， 如图 9所示。
本发明相对现有技术的优点体现在以下几个方面：
1 )本发明中带钢表面粗糙度由喷射在带钢表面的磨料颗粒的粒度、喷射距离、 喷射压力等因素决定，可根据用户对粗糙度的需求灵活控制上述相关参数，可在线 方便控制带钢表面粗糙度。特别是针对强度较高的带钢， 利用本发明中的方法可解 决传统生产工艺中，带钢表面粗糙度受到轧制及平整工艺、轧辊材质等因素的限制， 使得带钢粗糙度很难达到用户要求的问题；
2 )传统工艺中， 带钢进行退火之前， 为满足其表面质量要求， 要彻底清除残 留带钢表面的油脂、氧化铁皮等一些脏物， 因此在带钢进入退火之前均设置不同长 度的带钢表面预处理工艺段， 而其工作模式需要产生大量的不可回收工艺废碱， 能 耗较大。利用本发明中的方法， 利用向带钢表面喷射混合磨料的方法清除带钢表面 的油脂、 氧化铁皮等杂物， 可部分或完全替代传统工艺中的带钢预处理工艺， 减少 工业废碱的的排放、 减少设备工艺段的长度、 降低能耗；
3 )进入带钢预处理工艺段的带钢表面状态是多样的， 如带钢表面杂物与带钢 表面的结合程度不同， 带钢表面杂物的内容不同， 甚至有些带钢因工艺制度问题， 需要在进入表面预处理工艺之前放置很长时间，使得利用传统工艺生产时， 经常出 现带钢表面的杂物不能彻底清除干净的现象。本发明中根据向带钢表面喷射固体混 合磨料的物理方法清除带钢表面的杂物，可保证带钢表面不残留各种杂物，保证带 钢表面质量；
4 )本发明中带钢力学性能是通过冲击在带钢表面的浆料能量和冲击速度来进 行调质， 不受平整机压下系统设备能力的限制以及带钢强度的限制，解决传统平整 工艺设备能力不足的问题， 并根据带钢用途的不同， 灵活的改善带钢力学性能； 性能， 可代替平整工序， 整个工艺成本大大降氐
6 )本发明可设置于连续热镀锌生产线、连续电镀锌生产线、连续退火生产线、 连续脱脂生产工序中，对进入上述工艺的带钢进行表面预处理，也可设置在上述产 线的精整工序中， 完全或部分代替原有平整工艺的功能，可根据产品及工艺需求灵 活配置；
7 ) 固体磨料可循环使用， 使用成本较低；
8 )本发明中冲击带钢表面的介质为固体颗粒与水的混合物， 对所要处理的带 钢表面状态无特殊要求， 操作简单， 维护成本较低。 附图说明
图 1为带钢表面处理装置示意图 1 ;
图 2为带钢表面处理装置示意图 2;
图 3为实施方式 1的带钢表面预处理工艺示意图；
图 4为实施方式 2的带钢表面预处理工艺示意图；
图 5为实施方式 3的带钢表面预处理工艺示意图；
图 6为实施方式 4的带钢表面预处理工艺示意图；
图 7为实施方式 5的带钢表面预处理工艺示意图；
图 8为实施方式 6的带钢表面预处理工艺示意图；
图 9为实施方式 7的带钢表面预处理工艺示意图；
图 10为实施方式 1下带钢表面粗糙度分布；
图 11为实施方式 7下带钢力学性能变化对比图。 图中， 1为带钢表面处理单元， 1-1为高压喷射装置, 1-2为离心甩射装置， 2为 带钢表面清洗单元， 3为带钢表面烘干单元， 4为浆料供给单元， 5为磨料回收单 元， 6为带钢， 7为开卷机， 8为焊机， 9为卷取机， 11为退火出口活套， 10为入 口活套， 12为退火炉， 13为平整机， 14为退火机组， 15锌锅， 具体实施方式
实施例 1
以单独的脱脂机组上设置本发明中所述的带钢表面处理装置时的工艺为例，参 照图 3 , 具体实施方式如下：
本实施例中的带钢为宽度 700~1300mm、 厚度为 0.2~3mm的冷轧轧制后的带 钢。 此时， 带钢表面残留着轧制过程中产生的各种脏物， 包括轧制油及轧制油中的 渣质、 冷轧过程中产生的铁粉、 积聚的灰尘、 焊接过程中产生的焊渣等。 经冷轧轧 制后的带钢表面粗糙度为 0.7~0.8 μ m, 用户要求表面粗較度为 1.5 μ m。
带钢 6由开卷机 7开卷之后经焊机 8焊接，之后经过张力辊进入到钢板表面处 理装置 1 , 钢板预处理装置 1中将可配置如图 1所示的高压喷射装置 1-1或离心甩 射装置 1-2, 当采用高压喷射装置 1-1时， 固体磨料粒度采用 80~100目的钢丸， 钢 丸和水的很合比例控制在 50%的水平， 钢丸及水的混合物冲击在带钢表面的速度 为 70~90m/min。 钢板表面处理装置 1 中配置离心甩射装置 1-2时， 固体磨料粒度 采用 80~100目的钢丸， 钢丸和水的混合比为 70%, 钢丸及水的混合物冲击在带钢 表面的速度为 70~90m/min。如此处理的带钢表面的脏物在固体磨料和水的冲击下， 随着悬浮液分离带钢表面， 从而达到清洗带钢表面脏物的目的。 另一方面， 因冲击 在带钢表面的固体颗粒具有一定能量和速度， 并且固体颗粒的粒度大于带钢， 因此 带钢表面形成无序排列的小凹坑，从而达到控制带钢表面粗糙度的目的。如此处理 的带钢表面粗糙度达到 1.4~1.5 μ ηι。 经过钢板表面处理装置 1 处理之后的带钢进 入带钢表面清洗单元 2, 带钢表面清洗单元中 2中利用 20Mpa的纯水对带钢表面 进行冲洗， 使固体磨料从带钢表面上分析， 进入到设置钢板表面处理装置 1下部， 后经过滤回收装置 5进行回收利用。如此处理带钢表面已没有残留固体颗粒，后经 在带钢表面烘干单元 3中利用 100°C的热风进行干燥之后， 经卷取机 9进行卷取。 如此处理后的带钢表面的粗糙度沿着板宽方向的分布如图 10所示。
实施例 2
以在连续退火机组上设置本发明中所述的带钢表面处理装置时的工艺为例，参 照图 4, 具体实施方式如下：
本实施例中的带钢为宽度 700~1300mm、 厚度为 0.2~3mm的冷轧轧制后的带 钢。 此时， 带钢表面残留着轧制过程中产生的各种脏物， 包括轧制油及轧制油中的 渣质、 冷轧过程中产生的铁粉、 积聚的灰尘、 焊接过程中产生的焊渣等。 经冷轧轧 制后的带钢表面粗糙度为 0.7~0.8 μ m, 用户要求表面粗較度为 1.5 μ m。
带钢 6由开卷机 7开卷之后经焊机 8焊接， 之后进入钢板表面处理装置 1 , 钢 板表面处理装置中的工艺与实施例 1相同，如此处理的带钢进入入口活套 10之后， 在经过退火炉 12进行退火处理， 之后再进行平整、 拉矫处理， 最后由卷取机 9进 行卷取， 从而完成整个退火工艺。
实施例 3
以在连续热镀锌机组上设置本发明中所述的带钢表面处理装置时的工艺为例， 参照图 5, 具体实施方式如下：
带钢 6经开卷机 7开卷之后， 经焊机 8进入到入口活套 10, 再进入到钢板表 面处理装置 1 , 钢板预处理装置 1中的带钢表面处理工艺与实施例 1相仿， 经钢板 预处理装置 1处理后的带钢再经过退火炉 12进行退火处理之后， 在进行热镀锌处 理， 从而完成整个热镀锌工艺。
实施例 4
以在连续电镀锌机组上设置本发明中所述的带钢表面处理装置时的工艺为例， 参照图 5, 具体实施方式如下：
带钢 6经开卷机 7开卷之后， 经焊机 8进入到入口活套 10, 再进入到钢板表 面处理装置 1 , 钢板表面处理装置 1中的带钢表面处理工艺与实施例 1相仿， 经钢 板表面处理装置 1处理后的带钢再经过后续的电镀、磷化、 涂层等处理之后， 完成 整个电镀锌工艺过程。
实施例 5
以在平整工序后面增设该发明的方法的工艺布置图 7为例， 参照图 1和图 2, 具体实施方式如下：
该实施例使用板厚为 0.3~0.8mm, 宽度为 800~ 1200mm的冷轧钢板， 平整时的 延伸率为 0.8%, 平整机使用光棍， 带钢要求的粗糙度为 1.5 μ ηι。
如图 7所示工艺布置为例， 带钢 6经开卷机 7开卷之后经张力辊进入平整机 13, 平整机以 0.8%的延伸率对钢板进行平整， 从而改善带钢力学性能并改善带钢 板形， 经平整后带钢经张力辊进入带钢表面处理单元 1 , 带钢表面处理单元 1配有 磨料供给装置 4, 该装置 4中固体磨料采用钢丸， 其粒度为 60目， 固体磨料和水 的混合比为 70%, 磨料供给装置 4将上述混合比的浆料供应到高压喷射装置 1-1 , 高压喷射装置 1-1给浆料提供能量，使浆料以 120m/s的冲击速度冲击在带钢表面。 因冲击在带钢表面的介质为固体磨料和水的混合物， 因此带钢表面留有少量的浆 料， 大多数浆料将堆积在下方的锥形槽内。经浆料冲击后的带钢进入带钢冲洗单元
2, 带钢冲洗单元以 20Mpa的纯水冲洗带钢上下表面， 从而清除带钢表面残留的固 体颗粒。 如此， 带钢进入烘干装置 3, 烘干装置 3以 100 °C的高温气体对钢板进行 烘干， 以满足卷取等下道工序要求。 带钢后经张力辊， 由卷取机 9完成卷曲。
钢板表面处置装置 1 中使用离心甩射装置 1-2时， 固体磨料和水的混合比为
60%, 离心甩射装置 1-2通过叶轮给浆料提供冲击能量， 冲击在带钢表面的速度为 120m/s, 单位面积内冲击密度为 2kg/m2 , 其他步骤与上文相仿。
实施例 6
以在连续退火工艺的平整工序后增设该发明的方法的工艺布置图 8为例，参照 图 1和图 2, 具体实施方式如下：
该实施例使用板厚为 0.3~0.8mm, 宽度为 800~ 1200mm的冷轧钢板， 平整时的 延伸率为 0.6%, 平整机使用光棍， 带钢要求的粗糙度为 1.2 μ ηι。
带钢 6经开卷机 7开卷之后进入钢板剪切和焊接机组 8,后经退火入口活套 10 进入连续退火机组 14, 如此处理的带钢力学性能中存在屈服平台， 对带钢成型等 产生影响， 经退火后的带钢经退火出口活套后， 进入平整机组 13, 平整机组前后 均设置有张力装置， 平整工艺以 0.6%的延伸率对钢板进行平整， 从而消除退火后 带钢的屈服平台并改善带钢板形， 平整后的带钢进入钢板表面处理单元 1 , 钢板表 面处理单元 1中配置如图 1所示的高压喷射装置 1-1时， 磨料采用 80目的钢丸， 固体颗粒与水的混合比为 60%, 浆料冲击带钢的速度为 100m/s; 当钢板表面处理 单元 1中配置如图 2所示的离心甩射装置 1-2时， 固体磨料采用粒度为 80目的钢 丸， 固体颗粒与水的混合比为 50%, 浆料冲击带钢的速度为 100m/s。 如此处理的 带钢进入带钢清洗装置 2和带钢烘干装置 3 , 清洗装置 2和烘干装置 3中的处理工 艺与实施例 5相同，之后经张力辊组进入矫直单元，对带钢板形进行进一步的改善， 然后又卷取机 9完成卷曲。
实施例 7
以在连续退火工艺的平整工序后增设该发明的方法的工艺布置图 9为例，参照 图 1和图 2, 具体实施方式如下：
该实施例使用板厚为 0.3~0.8mm, 宽度为 800~ 1200mm的冷轧钢板， 带钢要求 的粗糙度为 1.2 μ ηι。
带钢 6经开卷机 7开卷之后首先进入带钢剪切和焊接 8,之后经退火入口活套 10进入退火机组 14, 后经退火出口活套 11直接进入带钢表面处理单元 1 , 带钢冲 表面处理单元前后均设置有张力辊组，带钢表面处理单元 1中设置有多组高压喷射 装置 1-1 , 带钢进入装置 1-1之后， 首先第 1、 2组高压喷射装置 1-1对带钢表面进 行喷射， 其冲击磨料为粒度为 30目， 浆料混合比为 70%, 冲击带钢的磨料速度为 150m/s, 经上述处理后带钢的力学性能发生变化， 退火后带钢中存在的屈服平台消 失， 如此， 带钢进入第 3、 4组高压喷射装置， 此时， 浆料粒度为 80目， 混合比为 60%, 冲击在带钢表面的冲击速度为 100m/s。经上述处理后的带钢表面粗糙度已达 到用户要求的粗糙度， 后续带钢进入表面清洗装置 2, 表面清洗装置以 20Mpa的 纯水对带钢上下表面进行冲洗，之后，带钢进入带钢烘干单元 3 ,烘干单元中以 100 。 的高温压缩气体对带钢表面进行烘干， 以满足卷取等工艺要求。
钢板表面处置装置 1中使用离心甩射装置 1-2时， 其实施方式与上文相仿， 但 第 1、 2组离心甩射装置 1-2喷射的浆料冲击速度为 150m/s, 其固体颗粒磨料粒度 为 30 目， 固体颗粒与水的混合比为 60%, 第 3、 4组离心甩射装置磨料冲击带钢 表面的速度为 100m/s, 磨料粒度为 80目， 混合比为 60%。
如此处理后的带钢力学性能与处理前的带钢力学性能的对比如图 11所示。 根据本发明， 利用将固体混合磨料冲击在带钢表面的方法，在线灵活控制带钢 表面粗糙度的同时， 清楚残留在带钢表面的油脂、 氧化铁皮等脏物， 另外也可以完 全或部分替代平整工序的作用。 因本专利所采用技术成熟， 实施容易， 推广应用完 全可行。 另一方面， 本专利能很好解决在生产高强钢时因设备能力不足， 导致带钢 粗糙度无法提高的问题，对产品扩展及产品质量的提升具有很高的推广价值。因此， 本发明在钢板表面处理领域具有广阔的应用前景。

Claims

权 利 要 求 书
1. 一种钢板表面处理方法， 其特征在于，
所述钢板表面处理方法顺序包括：
一个配置有高压喷射装置（1-1 )或离心甩射装置（1-2 ) 的带钢表面处理单元 ( 1 ) ,
所述高压喷射装置 （1-1 )或离心甩射装置 （1-2 )可单独布置也可混合布置， 所述高压喷射装置（ 1-1 )或离心甩射装置（ 1-2 )对带钢表面喷射固体磨料和 水的混合物， 即浆料，
带钢表面清洗单元 （2 ) ,
带钢表面烘干单元 （3 ) ,
另外， 所述钢板表面处理方法包括：
对配置有高压喷射装置（ 1-1 )或离心甩射装置（ 1-2 )的带钢表面处理单元（ 1 ) 供给浆料的浆料供给单元（4 ) , 及
磨料过滤回收单元 （5 ) 。
2.如权利要求 1所述钢板表面处理方法， 其特征在于， 其中用于冲击带钢表面 的固体颗粒和水的混合物， 其混合比例在 10~95%, 固体磨料可采用铁砂、 钢丸、 钢丝切丸等， 固体颗粒的粒度采用 20目至 100目之间。
3.如权利要求 1所述钢板表面处理方法， 其特征在于， 所述发明中带钢表面处 理单元（1 ) 中沿着板宽度方向布置多组高压喷射装置（1-1 ) , 沿着宽度方向可布 置 5~30组高压喷射喷射装置， 每组喷射装置可覆盖带钢宽度为 50~100mm, 带钢 宽度为 700~1400mm, 从而覆盖全板宽方向上的喷射，
另外沿着带钢前进方向也布置有 2~8排高压喷射装置 （1-1 ) 。
4.如权利要求 1所述钢板表面处理方法， 其特征在于， 带钢表面粗糙度控制范 围在 0.5 μ m至 5 μ m。
5.如权利要求 1所述钢板表面处理方法， 其特征在于， 浆料供给装置 （4)可 给各组高压喷射装置（ 1-1 )或离心甩射装置（ 1-2)供应不同固体颗粒粒度磨料和 混合比的浆料。
6.如权利要求 1所述钢板表面处理方法， 其特征在于， 带钢表面处理单元（2) 中利用纯水对带钢表面进行冲洗，纯水压力在 5~30Mpa,在带钢表面烘干单元（ 31 ) 中利用热风对带钢表面进行干燥。
7.如权利要求 1所述钢板表面处理方法， 其特征在于， 冲击在带钢表面的固体 磨料和水的冲击速度在 30m/s~300m/s范围内。
8.—种钢板表面处理装置， 其特征在于， 至少包含一个配置有高压喷射装置 (1-1)或离心甩射装置 （1-2) 的带钢表面处理单元 （1 ) 、 位于该装置下游的带 钢表面清洗单元（2) 、 位于清洗单元 （2) 下游的带钢表面烘干单元（3) 、 磨料 供给装置 （4) 、 磨料回收装置 （5) 。
9.如权利要求 8所述钢板表面处理装置， 其特征在于， 其中用于冲击带钢表面 的介质为固体颗粒和水的混合物， 其混合比例在 10~95%, 固体磨料可采用铁砂、 钢丸、 钢丝切丸等， 固体颗粒的粒度采用 20目至 100目之间。
10.如权利要求 8所述钢板表面处理装置， 其特征在于， 所述发明中带钢表面 处理单元 （1 ) 中沿着板宽度方向布置多组高压喷射装置 （ 1-1 ) 或离心甩射装置
( 1-2 ),其中高压喷射装置（ 1-1 )在板宽度方向可布置 5-30组高压喷射装置（ 1-1 ), 每组高压喷射装置 （ 1-1 ) 可覆盖的带钢宽度为 50~100mm, 带钢宽度为 700- 1400mm, 在带钢前进方向布置 2~8排高压喷射装置 （1-1) ，针对离心甩射装 置 （1-2) , 在带钢宽度方向上布置 1~2组， 根据甩射角度的调整覆盖全板宽的喷 射， 同样在带钢前进方向布置 2~8组离心甩射装置 （1-2) 。
11 如权利要求 8所述钢板表面处理装置， 其特征在于， 所述带钢表面处理单 元（ 1-1 ) 中， 可单独布置高压喷射装置（ 1-1 )或离心甩射装置（ 1-2) , 也可混合 布置高压喷射装置（1-1)或离心甩射装置（1-2) ， 对带钢中心部位的喷射优选选 用离心甩射装置 （1-2) , 对带钢边部区域的喷射优选选用高压喷射装置 （1-1) 。
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