US3781968A - Method for manufacturing steel sheets with layers of protective metal - Google Patents

Method for manufacturing steel sheets with layers of protective metal Download PDF

Info

Publication number
US3781968A
US3781968A US00259287A US3781968DA US3781968A US 3781968 A US3781968 A US 3781968A US 00259287 A US00259287 A US 00259287A US 3781968D A US3781968D A US 3781968DA US 3781968 A US3781968 A US 3781968A
Authority
US
United States
Prior art keywords
oil
rolls
steel sheet
metal
powder
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US00259287A
Other languages
English (en)
Inventor
H Yamagishi
F Yokoi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3781968A publication Critical patent/US3781968A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/06—Compressing powdered coating material, e.g. by milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/004—Filling molds with powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder

Definitions

  • ABSTRACT In a method of manufacturing a steel sheet coated with a layer of protective metal wherein a powder of the metal is coated on the surface of the steel sheet and the coated steel sheet is dried and then rolled by means of a rolling mill to form a layer of the protective metal bonded to the surface of the steel sheet, a small quantity of atomized oil is electrostatically applied onto the surfaces of the rolls of the rolling mill and the applied oil is treated with equalizing rolls to form thin oil films of uniform thickness on the surfaces of the rolls whereby to prevent the powder of metal from adhering to the surfaces of the rolls.
  • This invention relatesto a method and. apparatus for ing, a steel sheet 1 coated with layers 2 of a powder of manufacturing a steel sheet coated. with a protective metal, aluminum for example, by applying, a powder of the metal upon the surface of the steel sheet and then rolling the coated steel sheet, and more particularly relates to a method of preventing the powder of the metal from adhering to the surface of rolls of the rolling mill.
  • Steel sheets are often'c'oated with a powder of aluminum and then the coated steel sheets continuously pass through a rolling mill.
  • the rolls of the mill should, desirably have clean and dry surfaces.
  • oil films formed on the surfaces of the rolls are effective to prevent the aluminum powder from' adhering to the roll surfaces, the coating of the aluminum powder before rolling is easily permeated. by oil, so that the quantity of the oil applied onto the roll surfaces should be small. If the quantity of the oil is excessive, for example more than 50 mg/m the aluminum powder tends to adhere to the rolls as if no oil film were formed thereon.
  • a method of manufacturing a steel sheet coated with a layer of protective metal wherein a powder of the metal is coated on the surface of the steel sheet and the coated steel sheet is dried and then rolled by means of a rolling mill to form a layer of the metal bonded to the surface of the steel sheet, characterized in that a small quantity of' atomized oil is electrostatically applied onto the surfaces of the rolls of the rolling mill and the applied oil isleveled with equalizing rolls to form thin oil films of'uniform thickness on the surfaces of the rolls whereby to prevent the powder of the metal from adhering to the surfaces of the rolls.
  • an apparatus for manufacturing a steel sheet coated with a layer of protective metal comprising a rolling mill including cooperating rolls between which a steel sheet coated with a powder of the protective metal is passed, means for electrostatically applying a small quantity of oil onto the surfaces of the rolls, and equalizing rolls cooperatingwith the rolls of the rolling mill for forming thin films of the oil on the surfaces of the rolls of the rolling mill.
  • FIG. I shows a diagrammatic side view of a rolling mill for coatings of the protective metal on the surfaces of a steel sheet
  • FIG. 2 is a side view of an oiling device utilized in this invention
  • FIG. 3 shows a perspective view of a modified nozzle
  • FIG. 4 is a cross-sectional view of the nozzle shown in FlG. 3 taken along a line lV-IV.
  • the quantity of the applied oil should be in a range of from 5 mg/m to 50 mg/m When the quantity of the oil is less than 5 mg/m aluminum powder tends to adhere to the surfaces of the rolls, whereas when the quantity of the oil exceeds 50 mg/m the oil permeates through the aluminum powder to reach the surface of steel sheet thereby decreasing the adhesiveness at the Al/Fe interface and causing the aluminum powder to adhere to the surfaces of the rolls.
  • Oil 9 in an atomizing tank 8 is atomized by the primary pressurized air 10 ejected from a nozzle 11 and the concentration of the atomized oil is adjusted by the secondary air admitted into the atomizing tank 8.
  • the atomized oil is then ejected toward roll 3 through the slit 14 of a double walled nozzle 13.
  • an electrode 15 In front of the nozzle 13 is positioned an electrode 15 for ionizing the atomized oil ejected from slit 14.
  • a source of high voltage power is connected between the electrode 15 and roll 3 for causing the atomized oil to be charged at the electrode 15 and attached to the roll which is earthed to form a thin oil film on the surface of the roll.
  • FIGS. 3 and 4 show a modified nozzle 13 comprising concentric tubes 13a and 13b.
  • the outer tube 13a has an elongated slit l4 and the inner tube 13b is connected with the atomizing chamber 8 through a pipe 16 and is provided with a slit 13c in parallel with a slit 14 but on the opposite side.
  • the electrode may be provided in pipe 16 as at 15 as shown in FIG. 2.
  • the oil used may be a natural oil, such as cottonseed oil, or a synthetic oil such as dioctyl sebacate.
  • a natural oil such as cottonseed oil
  • a synthetic oil such as dioctyl sebacate
  • mill oil of the aqueous emulsion type can also be used.
  • the equalizing rolls 4 may be made of felt, nonwoven synthetic fiber fabric or rubber.
  • the doctor knife 6 When made of metal, the doctor knife 6 not only removes the aluminum powder. adhered to the roll 3 but also serves as the grounding terminal of the roll. However, when the roll is grounded by another means, the doctor knife is not necessarily be made of metal.
  • the adjustment of the quantity of the applied oil can be accomplished by varying the flow of the secondary air while maintaining the pressure of the primary or atomizing air at a definite value. Since the adequate quantity of the secondary air varies dependent upon the type of the used oil, it is advantageous to plot calibration curves for respective oils.
  • EXAMPLE Oil films were formed under following conditions when aluminum layers having a thickness of 30 microns were formed by rolling on the surface of steel strips having a thickness of 0.8 mm.
  • the rolling oil is electrostatically applied to the rollers, it is possible to improve the efficiency of utilization of the oil and to minimize the quantity of the applied oil so that post treatment of degreasing is not necessary. Moreover, as the quantity of the applied oil is small, adhesion of the metal powder to the roll surface can be effectively prevented, thus assuring continuous rolling of metal coated steel plates having a beautiful surface finish.
  • a method of manufacturing a steel sheet coated with a layer of protective metal wherein a powder of the metal is coated on the surface of the steel sheet and the coated steel sheet is dried and then rolled by means of a rolling mill to form a layer of the metal bonded to the surface of the steel sheet
  • the improvement which comprises the steps of electrostatically applying a small quantity of atomized oil onto the surfaces of the rolls of said rolling mill and leveling the applied oil with equalizing rolls to form thin oil films of uniform thickness on the surfaces of said rolls whereby to prevent said powder of the metal from adhering to the surfaces of said rolls.
  • said oil is selected from the group consisting of natural oils,

Landscapes

  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US00259287A 1971-06-16 1972-06-02 Method for manufacturing steel sheets with layers of protective metal Expired - Lifetime US3781968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46042498A JPS5035019B1 (xx) 1971-06-16 1971-06-16

Publications (1)

Publication Number Publication Date
US3781968A true US3781968A (en) 1974-01-01

Family

ID=12637713

Family Applications (1)

Application Number Title Priority Date Filing Date
US00259287A Expired - Lifetime US3781968A (en) 1971-06-16 1972-06-02 Method for manufacturing steel sheets with layers of protective metal

Country Status (9)

Country Link
US (1) US3781968A (xx)
JP (1) JPS5035019B1 (xx)
BE (1) BE784807A (xx)
CA (1) CA952263A (xx)
DE (1) DE2227216C3 (xx)
FR (1) FR2142006B1 (xx)
GB (1) GB1356507A (xx)
IT (1) IT956601B (xx)
ZA (1) ZA723595B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114251A (en) * 1975-09-22 1978-09-19 Allegheny Ludlum Industries, Inc. Process for producing elongated metal articles
US4234626A (en) * 1978-02-01 1980-11-18 E. I. Du Pont De Nemours And Company Producing printed circuits by conjoining metal powder images
US4526839A (en) * 1984-03-01 1985-07-02 Surface Science Corp. Process for thermally spraying porous metal coatings on substrates
CN104805432A (zh) * 2015-04-01 2015-07-29 苏州第一元素纳米技术有限公司 一种金属/纳米碳复合材料的制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454342A1 (fr) * 1979-04-19 1980-11-14 Usinor Procede et dispositif de lubrification de cylindres de laminoirs
CN114000137A (zh) * 2021-11-03 2022-02-01 南京工程学院 一种用于钢板压制锌铝合金粉的装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187348A (en) * 1936-03-17 1940-01-16 Hodson Frank Forming composite metal bearings
US2190237A (en) * 1937-12-30 1940-02-13 Gen Motors Corp Method of making a composite metal structure
US2290734A (en) * 1940-02-14 1942-07-21 Minerals And Metals Corp Manufacture of metal products
US2815567A (en) * 1953-04-15 1957-12-10 Federal Mogul Corp Process for making bearings
US3648497A (en) * 1970-02-18 1972-03-14 United States Steel Corp Apparatus for automatically supplying oil to a hot strip mill
US3661612A (en) * 1967-12-14 1972-05-09 Summers & Sons Ltd John Method of coating a moving metal strip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187348A (en) * 1936-03-17 1940-01-16 Hodson Frank Forming composite metal bearings
US2190237A (en) * 1937-12-30 1940-02-13 Gen Motors Corp Method of making a composite metal structure
US2290734A (en) * 1940-02-14 1942-07-21 Minerals And Metals Corp Manufacture of metal products
US2815567A (en) * 1953-04-15 1957-12-10 Federal Mogul Corp Process for making bearings
US3661612A (en) * 1967-12-14 1972-05-09 Summers & Sons Ltd John Method of coating a moving metal strip
US3648497A (en) * 1970-02-18 1972-03-14 United States Steel Corp Apparatus for automatically supplying oil to a hot strip mill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114251A (en) * 1975-09-22 1978-09-19 Allegheny Ludlum Industries, Inc. Process for producing elongated metal articles
US4234626A (en) * 1978-02-01 1980-11-18 E. I. Du Pont De Nemours And Company Producing printed circuits by conjoining metal powder images
US4526839A (en) * 1984-03-01 1985-07-02 Surface Science Corp. Process for thermally spraying porous metal coatings on substrates
CN104805432A (zh) * 2015-04-01 2015-07-29 苏州第一元素纳米技术有限公司 一种金属/纳米碳复合材料的制备方法

Also Published As

Publication number Publication date
ZA723595B (en) 1973-02-28
IT956601B (it) 1973-10-10
DE2227216B2 (de) 1974-12-05
CA952263A (en) 1974-08-06
JPS5035019B1 (xx) 1975-11-13
GB1356507A (en) 1974-06-12
BE784807A (fr) 1972-10-02
DE2227216C3 (de) 1975-07-24
DE2227216A1 (de) 1973-01-04
FR2142006A1 (xx) 1973-01-26
FR2142006B1 (xx) 1977-12-30

Similar Documents

Publication Publication Date Title
US3206323A (en) Coating high viscosity liquids
US5340616A (en) A coating method using an electrified web and increased humidity
US3781968A (en) Method for manufacturing steel sheets with layers of protective metal
ATE218651T1 (de) Folientransferbeschichtungsverfahren und vorrichtung zur durchführung des verfahrens
DE3134615A1 (de) Verfahren und vorrichtung zur vorbehandlung von fotografischen traegermaterialien
JPS62133198A (ja) 紙シ−ト加工方法
US3845539A (en) Apparatus for manufacturing steel sheets with layers of protective metal
US3661612A (en) Method of coating a moving metal strip
US1776141A (en) Method of and means for producing adhesive tape
CN210454122U (zh) 一种纸品印刷设备
CA2141473A1 (en) Method and device for coating a material web
DE102009041375A1 (de) Laminierverfahren und dazu gehörige Vorrichtung
IE44717B1 (en) Improvements in or relating to sound absorbent metal webs
GB2004773A (en) Coating paper strip
JPH025481B2 (xx)
JPH0751616A (ja) 静電塗布方法
JPS61146369A (ja) 塗布方法
US2331610A (en) Adhesive sheet material
US11897242B2 (en) Embosser-laminator with electrostatic adhesive application
JPS57134556A (en) Metallic vapor deposited paper and its manufacture
KR100406408B1 (ko) 아연도금강판의 수지피복방법
CN211587327U (zh) 一种涂布膜面电晕处理装置
EP3706515B1 (en) Web manufacturing method, charge control method, and charge control device
JPS62199208A (ja) 金属箔の製造方法
DE704647C (de) Verfahren zum Vermeiden oder Vermindern des elektrischen Aufladens der mit Schablonendruckern bedruckten Papierblaetter durch Erzeugen entgegengesetzter Ladungen