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US3754873A - Cold rolled sheet - Google Patents

Cold rolled sheet Download PDF

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Publication number
US3754873A
US3754873A US00112362A US3754873DA US3754873A US 3754873 A US3754873 A US 3754873A US 00112362 A US00112362 A US 00112362A US 3754873D A US3754873D A US 3754873DA US 3754873 A US3754873 A US 3754873A
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United States
Prior art keywords
cold rolled
roll
roughness
depressions
strip
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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
US00112362A
Inventor
M Bills
H Hansen
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United States Steel Corp
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Steel Corp
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Publication date
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Publication of US3754873A publication Critical patent/US3754873A/en
Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/04—Treating surfaces of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/10—Roughness of roll surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Definitions

  • ABSTRACT Division of Ser. No. 792,079, Jan. 17, 1969, Pat. No.
  • a cold rolled steel sheet or strip has a plurality of 52 U.S. c1.
  • 29/1835 clsely P generally frusmpherical [51 1m. (:1 B2lb 1/28 Substantially shape and height [58]
  • Field of Search 29/1835 180 ss thmughwt its surfm the arithmetic average ness of the surface being between 20 and 400 micro- [56 References Cited Inches- 2 Claims, 4 Drawing Figures PATENTEUMIBZB ms SHEET 2 [IF 2 PATENTEB A0828 I975 SMHIUFZ INVENTORS.
  • the surface finish of the product In the manufacture of cold rolled sheets it is necessary to control the surface finish of the product to the required degree of roughness so as to enhance the appearance and the performance of the material in subsequent operations.
  • the required finish is commonly obtained in the final stages of manufacture by rolling the strip between rolls of controlled roughness which impress such roughness generally into the surfaces of the strip. It is thus vitally important that these rolls possess the proper roughness.
  • the roll roughness is attained by carefully shot blasting the prepared roll surface, the depressions and associated peripheral upheaval thus created by particle impingement providing the desired roughness. This operation, however, is difficult to control because of differences in kinetic energy, size and angle of impingement of the shot blast particles.
  • the resultant roll roughness pattern is characterized by randomness with respect to the shape, size and distribution of the topographical features. It is common practice for the customer to request a particutionship to the true type of surface. In other words, the
  • the same reading by the profilometer may result from surfaces having a substantial difference in appearance and/or a substantial difference in the shape and arrangement of the depressions. Since it is desirable that the surfaces of the strip have the same visual appearance and also that it have the same texture for receiving paint, it is clear that the process and the rolls now in use are not entirely satisfactory.
  • FIG. 1 is a view of a conventional temper rolling mill for rolling sheets
  • FIG. 2 is a schematic view showing depressions being generated in the surface of the roll used in producing sheets according to our invention
  • FIG. 3 is a magnified view of a replica of the surface of the roll of FIG. 2;
  • FIG. 4 is a magnified view of a replica of the roll surface resulting from shot blasting according to the prior art.
  • reference numeral 2 indicates an uncoiler from which strip S is uncoiled and passes through a set of rolls 4 to a coiler 6. It will be understood that additional stands of rolls may be used at the entry side of rolls 4. However, the number of stands is not important insofar as our invention is concerned, it only being necessary that the 'known Electric Discharge Machining (EDM) operation, in which bursts of electrical energy 8 from electrode 10 volatilize and remove small amounts of metal from the surface of the roll. This method generates shallow depressions 12 in the outer surface of the roll, thus providing the desired roughening of the roll surface. Most all of the depressions are of substantially uniform shape and depth, and, while closely spaced, are randomly spread over the outer surface of the roll. It will be seen that the depressions 12 are rounded and are substantially frustospherical. FIG. 2 shows only a few depressions 12 for the sake of clarity, but in the finished roll they will be very closely spaced.
  • EDM Electric Discharge Machining
  • the depth and diameter of the depressions 12 may vary over wide limits depending on the desired degree of roughening, this being a matter of selecting the proper electrical parameters for the individual electrical discharges so as to generate the desired degree of roughness in the roll surface. This procedure is well known and presents no problem to the operator.
  • the depth of the individual depressions is such as to provide an arithmetic average (AA) roughness in the roll surface of about, microinches, as measured with conventional profilometer measuring equipment, the individual depressions associated with such roughness vary approximately from 0.0005 to 0.001 inch in depth and from 0.010 to 0.020 inch in diameter. It will be understood that further variation will occur from these figures because the electrical discharges are compounded on one another and act in this manner to alter the dimensions of the individual roughness features.
  • the individual depressions are always rounded and of comparable depth for a given electrical setting of the EDM equipment, and it is from this characteristic that the unique features of the surface finish of our invention are derived. Sharp corners are essentially eliminated.
  • the roughness may vary from approximately 20 to approximately 400 microinches, but in most cases will be between 20 and microinches. Increasing the intensity or size of the electrical discharge increases the roughness and decreasing the intensity or size of the electrical discharges lowers the roughness of the roll surface.
  • FIG. 3 is an enlarged photograph of a replica made of the surface of a work roll textured by Electric Discharge Machining methods, it represents the ideal strip surface finish obtainable when using our rolls.
  • the work roll finish is superimposed to a degree over any other finish which the strip being rolled may possess, so that a perfect reproduction of the roll surface may not always be impressed into the steel surface. It is clear, however, that the EDM type of roll surface will generate a strip finish consisting of rounded topographical features of generally consistent shape and size. The regularity of shape and size of the topographical features of the EDM type surface shown in FIG. 3 are evident by contrast with the varying shape and size of the features of the shot blasted surface of FIG. 4.
  • a cold rolled metal sheet having a plurality of closely spaced low projections on at least one side thereof, substantially all of said projections having a generally frustospherical shape and substantially uniform height, said projections having been produced by cold-rolling through opposed rolls corresponding to the texture of the respective sides of said sheet, wherein the the roll surface is between 20 and microinches.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

A cold rolled steel sheet or strip has a plurality of closely spaced, low, generally frustospherical projections of substantially uniform shape and height throughout its surface, the arithmetic average roughness of the surface being between 20 and 400 microinches.

Description

UNITED STATES PATENTS O U mted "States Patent 11 1 1111 3,754,873 Bills et al. Au 28, 1973 1 COLDROLLED SHEET 319,306 6/1885 Palmer 29/188 9 [75] Inventors: Max E. Bills, Pleasant Hills Borough, 3'0O3'599 10/1961 Rubmw 2 I18 Pa.; Henry J. Hansen, Jr., Portage,
l d. n Primary Examiner-A. B. Curtis 1 Asslsnw United States Steel Corporation, Assistant Examiner-O. E. Crutchfield Pittsburgh AttorneyArthur J. Greif [22] Filed: Feb. 3, 1971 [21] Appl. No.:- 112,362
Related US. Application Data [57] ABSTRACT [62] Division of Ser. No. 792,079, Jan. 17, 1969, Pat. No.
A cold rolled steel sheet or strip has a plurality of 52 U.S. c1. 29/1835 clsely P generally frusmpherical [51 1m. (:1 B2lb 1/28 Substantially shape and height [58] Field of Search 29/1835 180 ss thmughwt its surfm the arithmetic average ness of the surface being between 20 and 400 micro- [56 References Cited Inches- 2 Claims, 4 Drawing Figures PATENTEUMIBZB ms SHEET 2 [IF 2 PATENTEB A0828 I975 SMHIUFZ INVENTORS. MAX E. BILLS AND HENRY J, HANSEN, JR. By I A r tor/ray COLD ROLLED SHEET This application, which is a division of my co-pending application Ser. No. 792,079, filed Jan. 17, 1969, now U.S. Pat. No. 3,619,881 relates to a cold rolled sheet and more particularly to a steel sheet having low projections thereon.
In the manufacture of cold rolled sheets it is necessary to control the surface finish of the product to the required degree of roughness so as to enhance the appearance and the performance of the material in subsequent operations. The required finish is commonly obtained in the final stages of manufacture by rolling the strip between rolls of controlled roughness which impress such roughness generally into the surfaces of the strip. It is thus vitally important that these rolls possess the proper roughness. Conventionally, the roll roughness is attained by carefully shot blasting the prepared roll surface, the depressions and associated peripheral upheaval thus created by particle impingement providing the desired roughness. This operation, however, is difficult to control because of differences in kinetic energy, size and angle of impingement of the shot blast particles. Thus, the resultant roll roughness pattern is characterized by randomness with respect to the shape, size and distribution of the topographical features. It is common practice for the customer to request a particutionship to the true type of surface. In other words, the
same reading by the profilometer may result from surfaces having a substantial difference in appearance and/or a substantial difference in the shape and arrangement of the depressions. Since it is desirable that the surfaces of the strip have the same visual appearance and also that it have the same texture for receiving paint, it is clear that the process and the rolls now in use are not entirely satisfactory.
It is therefore an object of our invention to provide a cold rolled sheet having projections of such shape and arrangement that the visual appearance and surface of the sheet is relatively constant. I
This and other objects will be more apparent after referring to the following specification and attached drawings, in which:
FIG. 1 is a view of a conventional temper rolling mill for rolling sheets;
FIG. 2 is a schematic view showing depressions being generated in the surface of the roll used in producing sheets according to our invention;
FIG. 3 is a magnified view of a replica of the surface of the roll of FIG. 2; and
FIG. 4 is a magnified view of a replica of the roll surface resulting from shot blasting according to the prior art.
Referring more particularly to the drawings, reference numeral 2 indicates an uncoiler from which strip S is uncoiled and passes through a set of rolls 4 to a coiler 6. It will be understood that additional stands of rolls may be used at the entry side of rolls 4. However, the number of stands is not important insofar as our invention is concerned, it only being necessary that the 'known Electric Discharge Machining (EDM) operation, in which bursts of electrical energy 8 from electrode 10 volatilize and remove small amounts of metal from the surface of the roll. This method generates shallow depressions 12 in the outer surface of the roll, thus providing the desired roughening of the roll surface. Most all of the depressions are of substantially uniform shape and depth, and, while closely spaced, are randomly spread over the outer surface of the roll. It will be seen that the depressions 12 are rounded and are substantially frustospherical. FIG. 2 shows only a few depressions 12 for the sake of clarity, but in the finished roll they will be very closely spaced.
The depth and diameter of the depressions 12 may vary over wide limits depending on the desired degree of roughening, this being a matter of selecting the proper electrical parameters for the individual electrical discharges so as to generate the desired degree of roughness in the roll surface. This procedure is well known and presents no problem to the operator. When the depth of the individual depressions is such as to provide an arithmetic average (AA) roughness in the roll surface of about, microinches, as measured with conventional profilometer measuring equipment, the individual depressions associated with such roughness vary approximately from 0.0005 to 0.001 inch in depth and from 0.010 to 0.020 inch in diameter. It will be understood that further variation will occur from these figures because the electrical discharges are compounded on one another and act in this manner to alter the dimensions of the individual roughness features. Despite such phenomena, however, the individual depressions are always rounded and of comparable depth for a given electrical setting of the EDM equipment, and it is from this characteristic that the unique features of the surface finish of our invention are derived. Sharp corners are essentially eliminated. The roughness may vary from approximately 20 to approximately 400 microinches, but in most cases will be between 20 and microinches. Increasing the intensity or size of the electrical discharge increases the roughness and decreasing the intensity or size of the electrical discharges lowers the roughness of the roll surface.
Since the time required to texture rolls to the smoother finishes can become prolonged, it may be advisable in some instances to provide deeper depressions than desired and then brush or otherwise smooth the surface of the roll to obtain a smoother finish. Care must be taken not to substantially alter the shape or other essential characteristics of the EDM type finish.
Since FIG. 3 is an enlarged photograph of a replica made of the surface of a work roll textured by Electric Discharge Machining methods, it represents the ideal strip surface finish obtainable when using our rolls.
' However, the work roll finish is superimposed to a degree over any other finish which the strip being rolled may possess, so that a perfect reproduction of the roll surface may not always be impressed into the steel surface. It is clear, however, that the EDM type of roll surface will generate a strip finish consisting of rounded topographical features of generally consistent shape and size. The regularity of shape and size of the topographical features of the EDM type surface shown in FIG. 3 are evident by contrast with the varying shape and size of the features of the shot blasted surface of FIG. 4.
While one embodiment of our invention has been shown and described, it will be apparent that other ad- 3 aptations and modifications may be made without departing from the scope of the following claims;
We claim:
1. A cold rolled metal sheet having a plurality of closely spaced low projections on at least one side thereof, substantially all of said projections having a generally frustospherical shape and substantially uniform height, said projections having been produced by cold-rolling through opposed rolls corresponding to the texture of the respective sides of said sheet, wherein the the roll surface is between 20 and microinches.
i i i i

Claims (1)

  1. 2. A cold rolled metal sheet produced according to claim 1 in which the arithmetic average roughness of the roll surface is between 20 and 80 microinches.
US00112362A 1969-01-17 1971-02-03 Cold rolled sheet Expired - Lifetime US3754873A (en)

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US79207969A 1969-01-17 1969-01-17
US11236271A 1971-02-03 1971-02-03

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US792079*A Expired - Lifetime US3619881A (en) 1969-01-17 1969-01-17 Cold rolling work roll
US00112362A Expired - Lifetime US3754873A (en) 1969-01-17 1971-02-03 Cold rolled sheet

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BE (1) BE744556A (en)
DE (1) DE2001915A1 (en)
FR (1) FR2032316B1 (en)
GB (1) GB1302841A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071657A (en) * 1974-11-06 1978-01-31 Societe Lorraine De Laminage Continu Metal sheet for drawing
US4111032A (en) * 1974-11-06 1978-09-05 Societe Lorraine De Laminage Continu Process for producing a metal sheet to be deep drawn or extra-deep drawn for the fabrication of shaped metal parts
DE2840702A1 (en) * 1977-09-22 1979-04-05 Centre Rech Metallurgique PROCESS AND DEVICE FOR IMPROVING THE QUALITY OF STEEL SHEET METAL
FR2426276A1 (en) * 1978-05-01 1979-12-14 Polaroid Corp PHOTOGRAPHIC TREATMENT ROLLER WITH A RUGGED SURFACE BY ELECTRIC DISCHARGE MACHINING
FR2430816A1 (en) * 1978-07-13 1980-02-08 Mitsubishi Electric Corp PROCESS FOR MACHINING BY ELECTRIC SHOCK OF A CYLINDRICAL PART
US4553012A (en) * 1984-04-18 1985-11-12 Anderson Alex L Electrical discharge surface conditioning device
EP0234698A1 (en) * 1986-01-17 1987-09-02 Kawasaki Steel Corporation Steel sheets for painting and a method of producing the same
US4841611A (en) * 1986-07-14 1989-06-27 Kawasaki Steel Corporation Work roll with dulled surface having geometrically patterned uneven dulled sections for temper rolling
EP0251759A3 (en) * 1986-06-30 1989-07-26 Kawasaki Steel Corporation Steel sheets for use in forming cans by deep-drawing and ironing
US5012062A (en) * 1989-07-18 1991-04-30 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Arc-textured high emittance radiator surfaces
US5543961A (en) * 1993-06-10 1996-08-06 The United States Of America As Represented By The Administator Of The National Aeronautics And Space Administration Far-infrared diffuse reflector
US5780726A (en) * 1995-03-23 1998-07-14 Bethlehem Steel Corporation Method of determining slope angles of impression walls and depths of impressions on an embossed sheet surface
US5818006A (en) * 1995-12-07 1998-10-06 Ford Global Technologies, Inc. Surface preparation electrical discharge apparatus and method
RU2149717C1 (en) * 1999-01-19 2000-05-27 Акционерное общество "Новолипецкий металлургический комбинат", (ОАО "НЛМК") Method of producing zinc-plated strip steel for subsequent application of high-quality paint coatings
RU2158639C2 (en) * 1994-03-30 2000-11-10 Сидмар Н.В. Method and apparatus for making metallic strips or sheets, metallic sheets or strips
RU2183515C1 (en) * 2001-06-28 2002-06-20 Платов Сергей Иосифович Method for skin pass rolling of hot rolled steel sheet
RU2196652C1 (en) * 2001-06-27 2003-01-20 Закрытое акционерное общество "ТЕХНОМАГ" Method for preparing blank surface for drawing
RU2196650C1 (en) * 2001-06-27 2003-01-20 Закрытое акционерное общество "ТЕХНОМАГ" Method for forming microgeometry of surface of rods and small bars
RU2238160C1 (en) * 2003-04-22 2004-10-20 ООО "ПромИнвест" Method of working surface of blank for forming its roughness at drawing wire
RU2492006C1 (en) * 2012-07-24 2013-09-10 Александр Иванович Трайно Method of tempering hot-rolled steel strips
RU2596565C1 (en) * 2015-06-09 2016-09-10 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Method for production of hot galvanised roll stock
WO2019042313A1 (en) * 2017-08-29 2019-03-07 宝山钢铁股份有限公司 Metal sheet having low friction coefficient and low waviness

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US3827269A (en) * 1972-11-06 1974-08-06 Gen Motors Corp Roll forming apparatus
US3796361A (en) * 1972-12-26 1974-03-12 A Rueckert Folding roller for use in a buckle folding machine
DE3137827C2 (en) * 1981-09-23 1984-05-10 Krupp Stahl Ag, 4630 Bochum Process for roughening the roll surface of a skin pass roll for re-rolling thin sheet metal
US4775599A (en) * 1985-12-24 1988-10-04 Kawasaki Steel Corporation Cold rolled steel sheets having an improved press formability
JPS62230402A (en) * 1986-03-31 1987-10-09 Kawasaki Steel Corp Steel plate for painting and its manufacturing method
LU86531A1 (en) * 1986-07-28 1988-02-02 Centre Rech Metallurgique METAL PRODUCT HAVING IMPROVED SHINE AFTER PAINTING AND METHODS OF MAKING SAME
US4978583A (en) * 1986-12-25 1990-12-18 Kawasaki Steel Corporation Patterned metal plate and production thereof
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EP0436762A1 (en) * 1990-01-12 1991-07-17 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Method and apparatus for achieving a predetermined yield point and surface roughness during cold-laminating of metallic pre-treated strips
US5025547A (en) * 1990-05-07 1991-06-25 Aluminum Company Of America Method of providing textures on material by rolling
JP3067353B2 (en) * 1991-12-09 2000-07-17 川崎製鉄株式会社 Shutter material for cartridge
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US9256129B2 (en) 2014-02-19 2016-02-09 Macdermid Printing Solutions, Llc Method for creating surface texture on flexographic printing elements
KR20180049269A (en) * 2014-05-12 2018-05-10 아르코닉 인코포레이티드 Apparatus and method for rolling metal
BR112018011559A2 (en) * 2015-12-10 2018-11-27 Novelis Inc Method for texturing a rolling mill, rolling mill, product, and, metal strip
KR20200033893A (en) * 2017-07-21 2020-03-30 노벨리스 인크. System and method for controlling flatness of metal substrate by low pressure rolling

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071657A (en) * 1974-11-06 1978-01-31 Societe Lorraine De Laminage Continu Metal sheet for drawing
US4111032A (en) * 1974-11-06 1978-09-05 Societe Lorraine De Laminage Continu Process for producing a metal sheet to be deep drawn or extra-deep drawn for the fabrication of shaped metal parts
DE2840702A1 (en) * 1977-09-22 1979-04-05 Centre Rech Metallurgique PROCESS AND DEVICE FOR IMPROVING THE QUALITY OF STEEL SHEET METAL
FR2404048A1 (en) * 1977-09-22 1979-04-20 Centre Rech Metallurgique METHOD AND DEVICE FOR IMPROVING THE PROPERTIES OF THIN STEEL SHEETS
FR2426276A1 (en) * 1978-05-01 1979-12-14 Polaroid Corp PHOTOGRAPHIC TREATMENT ROLLER WITH A RUGGED SURFACE BY ELECTRIC DISCHARGE MACHINING
FR2430816A1 (en) * 1978-07-13 1980-02-08 Mitsubishi Electric Corp PROCESS FOR MACHINING BY ELECTRIC SHOCK OF A CYLINDRICAL PART
US4553012A (en) * 1984-04-18 1985-11-12 Anderson Alex L Electrical discharge surface conditioning device
EP0234698A1 (en) * 1986-01-17 1987-09-02 Kawasaki Steel Corporation Steel sheets for painting and a method of producing the same
EP0251759A3 (en) * 1986-06-30 1989-07-26 Kawasaki Steel Corporation Steel sheets for use in forming cans by deep-drawing and ironing
US4841611A (en) * 1986-07-14 1989-06-27 Kawasaki Steel Corporation Work roll with dulled surface having geometrically patterned uneven dulled sections for temper rolling
US5012062A (en) * 1989-07-18 1991-04-30 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Arc-textured high emittance radiator surfaces
US5543961A (en) * 1993-06-10 1996-08-06 The United States Of America As Represented By The Administator Of The National Aeronautics And Space Administration Far-infrared diffuse reflector
RU2158639C2 (en) * 1994-03-30 2000-11-10 Сидмар Н.В. Method and apparatus for making metallic strips or sheets, metallic sheets or strips
US5780726A (en) * 1995-03-23 1998-07-14 Bethlehem Steel Corporation Method of determining slope angles of impression walls and depths of impressions on an embossed sheet surface
US5818006A (en) * 1995-12-07 1998-10-06 Ford Global Technologies, Inc. Surface preparation electrical discharge apparatus and method
RU2149717C1 (en) * 1999-01-19 2000-05-27 Акционерное общество "Новолипецкий металлургический комбинат", (ОАО "НЛМК") Method of producing zinc-plated strip steel for subsequent application of high-quality paint coatings
RU2196652C1 (en) * 2001-06-27 2003-01-20 Закрытое акционерное общество "ТЕХНОМАГ" Method for preparing blank surface for drawing
RU2196650C1 (en) * 2001-06-27 2003-01-20 Закрытое акционерное общество "ТЕХНОМАГ" Method for forming microgeometry of surface of rods and small bars
RU2183515C1 (en) * 2001-06-28 2002-06-20 Платов Сергей Иосифович Method for skin pass rolling of hot rolled steel sheet
RU2238160C1 (en) * 2003-04-22 2004-10-20 ООО "ПромИнвест" Method of working surface of blank for forming its roughness at drawing wire
RU2492006C1 (en) * 2012-07-24 2013-09-10 Александр Иванович Трайно Method of tempering hot-rolled steel strips
RU2596565C1 (en) * 2015-06-09 2016-09-10 Публичное акционерное общество "Северсталь" (ПАО "Северсталь") Method for production of hot galvanised roll stock
WO2019042313A1 (en) * 2017-08-29 2019-03-07 宝山钢铁股份有限公司 Metal sheet having low friction coefficient and low waviness
US11559829B2 (en) 2017-08-29 2023-01-24 Baoshan Iron & Steel Co., Ltd. Metal sheet having low friction coefficient and low waviness

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GB1302841A (en) 1973-01-10
BE744556A (en) 1970-07-01
FR2032316B1 (en) 1975-01-10
AT302225B (en) 1972-10-10
US3619881A (en) 1971-11-16
DE2001915A1 (en) 1970-07-23
FR2032316A1 (en) 1970-11-27

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