EP0463578A1 - Procédé pour la production de bandes métalliques plaquées par pulvérisation - Google Patents

Procédé pour la production de bandes métalliques plaquées par pulvérisation Download PDF

Info

Publication number
EP0463578A1
EP0463578A1 EP91110198A EP91110198A EP0463578A1 EP 0463578 A1 EP0463578 A1 EP 0463578A1 EP 91110198 A EP91110198 A EP 91110198A EP 91110198 A EP91110198 A EP 91110198A EP 0463578 A1 EP0463578 A1 EP 0463578A1
Authority
EP
European Patent Office
Prior art keywords
spray
strip
metal strip
molten metal
spraying
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.)
Granted
Application number
EP91110198A
Other languages
German (de)
English (en)
Other versions
EP0463578B1 (fr
Inventor
Susumu Yamaguchi
Toshihiko Miki
Hiroyuki Uchida
Itsuo Ohnaka
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.)
Ohnaka Itsuo
Nippon Steel Corp
Original Assignee
Ohnaka Itsuo
Nippon Steel Corp
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 Ohnaka Itsuo, Nippon Steel Corp filed Critical Ohnaka Itsuo
Publication of EP0463578A1 publication Critical patent/EP0463578A1/fr
Application granted granted Critical
Publication of EP0463578B1 publication Critical patent/EP0463578B1/fr
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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/123—Spraying molten metal

Definitions

  • the present invention relates to a process for producing a spray-plated metal strip, sheet, or plate by spraying a molten metal on a metal strip.
  • the sprayed strip is necessarily subjected to a smoothing treatment of the sprayed metal layer, to obtain a smooth surface of a plated metal strip.
  • Japanese Unexamined Patent Publication (Kokai) No. 1-201456 discloses a process, which comprises cleaning a steel sheet surface, spraying the thus cleaned sheet with a molten metal atomized by a pressurized gas, and then blowing the sheet with a pressurized gas by a gas wiping nozzle.
  • Such a gas-wiping conditioning treatment of the sprayed sheet surface cannot provide a well smoothed surface of a plated strip in comparison with those obtained by other plating processes such as electroplating, hot dipping, etc.
  • the object of the present invention is to provide a process for producing a spray-plated metal strip, which provides a plated strip surface as smooth as a dip-plated strip surface.
  • a process for producing a spray-plated metal strip by spraying molten metal on a metal strip which comprises:
  • weight average particle diameter as herein used is defined as follows.
  • a globe of the equivalent volume should have a diameter, d, which can be calculated from
  • the diameter "d” is referred to as "equivalent globe diameter”.
  • the weight average particle diameter, dm is obtained by where
  • the weight average particle diameter, dm refers to a particle diameter in terms of the equivalent globe diameter which satisfies the above equation, i.e., a summation of the weight of particles having a diameter of dm or less amounts to 50% of the total weight M of particles having a distribution in diameter.
  • metal strip as herein referred to includes strips, sheets, and plates of metallic materials, such as steel, copper, copper alloys, aluminum, aluminum alloys, etc.
  • the present inventive process uses a spray of molten metal particles having a weight average particle diameter of not more than 15 times the thickness of a plated layer to be formed on a metal strip.
  • Figure 1 shows that the molten metal particle of size larger than the plated layer thickness can be used in the present invention, because the molten metal particle size does not directly correspond to the plated layer thickness due to wetting between the molten metal and the substrate metal strip.
  • the molten metal particle must have a weight average particle diameter of not more than 15 times the plated layer thickness for the following reason.
  • Figure 2 shows the percentage of a non-plated area as a function of the ratio of the weight average particle diameter (d am) of a sprayed molten metal to the target thickness (t ⁇ m) of a plated layer.
  • the deposition efficiency of the sprayed molten metal on the strip surface is ensured to be 90% or more by using the distance "L" from a spraying apparatus to a strip to be sprayed in the range defined by the following formula:
  • Figure 3 shows the deposition efficiency as a function of the parameter "k". It is seen from Fig. 3 that, to obtain a deposition efficiency of 90% or more, the k-value should be less than 1.75, i.e., k ⁇ 1.75, and in turn, the distance "L" should be in the range as defined by the above-stated inequality formula.
  • the spraying of a molten metal is carried out in separate spraying steps by directing a metal strip through separate spraying means. This enables the plated thickness to be controlled in a wide range with respect to the strip conveying speed while ensuring an improved smoothness of a spray-plated strip surface.
  • the present inventive process preferably further comprises heating and holding a metal strip, which has been sprayed with a molten metal, at a temperature of T and for a time of S defined by the following formula, to provide a smoother surface of a metal strip; where T>Tm,
  • the heating and holding of a sprayed strip at the specified temperature and for the specified time promotes wetting between the deposit metal and the substrate strip and further improves the smoothness of a spray-plated metal strip product.
  • the strip is preferably electroplated with a precoating metal such as nickel before being sprayed, to further improve the smoothness of a spray-plated metal strip product.
  • Figure 4 shows an arrangement in which a steel sheet was plated with zinc by a process according to the present invention.
  • a continuous plating arrangement 1 is disposed on the outlet side of a not-shown continuous annealing furnace.
  • a steel sheet "S" which was being conveyed in the direction denoted by an arrow, was annealed in a not-shown continuous annealing furnace, had a temperature of 450 C when passing a deflector roll 2, and was directed through a plating chamber in which spray nozzles 3 are arranged in two stages along the conveying direction and sprayed a molten metal on the steel sheet "S" being conveyed.
  • the molten metal spray had a particle size of 25 ⁇ m in terms of the weight average particle diameter. This particle size was obtained by gas-atomizing with a non-oxidizing gas such as nitrogen, argon, etc.
  • the steel sheet "S" was heated by a heater element which can heat the sheet without being in contact therewith.
  • Electrical heaters, high frequency heaters, radiant tube heaters or other non-contact type heaters may be used for this purpose.
  • the heating atmosphere may be either oxidizing or non-oxidizing.
  • the spray nozzles 3 had a maximum spray amount of 160 g/sec/m(width) and a controllable range of from 160 to 80 g/sec/m(width).
  • An annealed steel sheet having a temperature of 450 C was sprayed with zinc-0.2% aluminum in the plating chamber provided with two stages of spray nozzles 3 having a spray amount of 160 g/sec/m(width) per stage.
  • the temperature of the molten zinc spray was 460 C.
  • the thus sprayed steel sheet was heated at 450 C for 0.5 sec by being held in an atmosphere of 100% nitrogen gas held at 4500 C.
  • the spraying distance "L” or the distance between the spray nozzles 3 and the steel sheet "S” was determined with respect to the particle size, the initial speed, and the flare angle of the molten metal spray, as expressed by the following relationship: where the symbols have the same meanings as herein previously defined.
  • a spray-plating test of a steel sheet was carried out by using an arrangement provided with seven stages of spray nozzles.
  • Figure 5 shows the interrelationship between the number of nozzle stages actually used, the weight deposit on the sheet surface per unit area of one sheet side, and the speed of a steel sheet conveying line.
  • the abscissa represents the line speed in m/min, the left ordinate the weight deposit, and the right ordinate the total spray amount from the spray nozzles. It is seen from Fig. 5 that the more the nozzle stages used, the wider the controllable ranges of both the weight deposit and the line speed.
  • the spray amount per stage is increased, the total number of nozzle stages can be reduced, but the uncontrollable range denoted by "A" becomes wider.
  • the spray amount per stage is too small, the number of nozzle stages should be increased and the equipment cost is raised. It is, then, important that the number of nozzle stages be reasonably determined in accordance with the line speed and the maximum weight deposit for specific cases.
  • Figure 6 shows the interrelationship between the residence time "S” in the heating furnace 5, a parameter "X” as defined below, and the surface smoothness of a spray-plated metal strip product.
  • the blank circles, the solid circles, and the "X"-marks mean that the surface of a spray-plated steel sheet product is perfectly smooth, has few defects, and is significantly defective, respectively.
  • a spray-plated steel sheet was produced by using two stages of spray nozzles at a weight deposit zinc of 80 g/m 2 per one sheet side, under the same condition as mentioned above.
  • the product sheet was subjected to a salt water spray test to estimate the corrosion resistance of the steel sheet.
  • a conventional hot-dip plated steel sheet was also tested under the same testing condition.
  • the hot-dipping was carried out under the condition of a zinc plating bath temperature of 450°C, a pre-dip steel sheet temperature of 453 C, a zinc plating bath composition of 99.8% zinc and 0.2% aluminum.
  • Figure 7 shows the plots of the thus obtained results in terms of the weight loss by corrosion as a function of the duration of salt water spray. The result proves that the present inventive spray-plated steel sheet has a good corrosion resistance comparable with that of the conventional hot-dip plated steel sheet.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Coating With Molten Metal (AREA)
EP91110198A 1990-06-21 1991-06-20 Procédé pour la production de bandes métalliques plaquées par pulvérisation Expired - Lifetime EP0463578B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2164727A JP2994436B2 (ja) 1990-06-21 1990-06-21 溶融メッキ帯状金属の製造方法
JP164727/90 1990-06-21

Publications (2)

Publication Number Publication Date
EP0463578A1 true EP0463578A1 (fr) 1992-01-02
EP0463578B1 EP0463578B1 (fr) 1994-12-21

Family

ID=15798752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110198A Expired - Lifetime EP0463578B1 (fr) 1990-06-21 1991-06-20 Procédé pour la production de bandes métalliques plaquées par pulvérisation

Country Status (4)

Country Link
EP (1) EP0463578B1 (fr)
JP (1) JP2994436B2 (fr)
CA (1) CA2044763C (fr)
DE (1) DE69106061T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650388A1 (fr) * 2012-04-12 2013-10-16 Linde Aktiengesellschaft Procédé et trajet de traitement pour l'affinement par tronçons d'un produit métallique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010014469U1 (de) * 2010-10-19 2011-01-13 A bis Z Oberflächenveredlung GmbH & Co. KG Langfristiger Korrosionsschutz durch eine Spritzverzinkung des Unterwasserbereichs von Schiffen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873219A (en) * 1954-12-20 1959-02-10 Joseph B Brennan Metal-coated batt and method and apparatus for producing same
EP0119036A1 (fr) * 1983-03-09 1984-09-19 National Research Development Corporation Revêtement d'un substrat métallique avec du métal
FR2558850A1 (fr) * 1984-01-26 1985-08-02 Clecim Sa Procede et dispositif de revetement d'un produit long par pulverisation d'un materiau de revetement liquide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873219A (en) * 1954-12-20 1959-02-10 Joseph B Brennan Metal-coated batt and method and apparatus for producing same
EP0119036A1 (fr) * 1983-03-09 1984-09-19 National Research Development Corporation Revêtement d'un substrat métallique avec du métal
FR2558850A1 (fr) * 1984-01-26 1985-08-02 Clecim Sa Procede et dispositif de revetement d'un produit long par pulverisation d'un materiau de revetement liquide

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF METAL vol. 41, no. 10, October 1989, WARRENDALE, USA pages 23 - 28; P. MATHUR ET AL: 'PROCESS CONTROL, MODELING AND APPLICATIONS OF SPRAY CASTING ' *
METTALLURGICAL TRANSACTIONS /A vol. 20A, no. 1, January 1989, WARRENDALE, USA pages 71 - 85; E. GUTIERREZ-MIRAVETE: 'A MATHEMATICAL MODEL OF THE SPRAY DEPOSITION PROCESS ' *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2650388A1 (fr) * 2012-04-12 2013-10-16 Linde Aktiengesellschaft Procédé et trajet de traitement pour l'affinement par tronçons d'un produit métallique

Also Published As

Publication number Publication date
JPH0452261A (ja) 1992-02-20
DE69106061D1 (de) 1995-02-02
JP2994436B2 (ja) 1999-12-27
EP0463578B1 (fr) 1994-12-21
DE69106061T2 (de) 1995-05-11
CA2044763C (fr) 1996-12-31
CA2044763A1 (fr) 1991-12-22

Similar Documents

Publication Publication Date Title
JPS5837391B2 (ja) 燐酸塩処理性に優れた冷延鋼板の製造方法
JP3758549B2 (ja) 熱間プレス加工方法
JP4555499B2 (ja) 表面性状に優れた溶融Ｚｎ−Ａｌ−Ｍｇ−Ｓｉめっき鋼材とその製造方法
CA1145625A (fr) Methode d'intensification de l'apport d'alliage en galvanisation de l'acier
EP0463578B1 (fr) Procédé pour la production de bandes métalliques plaquées par pulvérisation
JP2964911B2 (ja) Ｐ添加高張力鋼材の合金化溶融亜鉛めっき方法
JP3931859B2 (ja) 熱間成形用亜鉛系めっき鋼材と熱間成形方法
KR100286667B1 (ko) 아연도금강판의 제조방법
JP2004124118A (ja) プレス成形性及び外観に優れた溶融亜鉛めっき鋼板およびその製造方法
JPH0688193A (ja) 合金化溶融亜鉛めっき鋼板の製造方法
JPH051357A (ja) 溶融金属めつき方法
JPS5931858A (ja) 合金化溶融亜鉛メツキ鋼板の製造法
JPS62256959A (ja) 合金化メツキ鋼板の製造方法
JPH0978214A (ja) 皮膜密着性に優れた合金化溶融亜鉛めっき鋼板及びその製造方法
JP3654520B2 (ja) 加工性と加工部耐食性に優れた表面処理鋼板及びその製造方法
KR100286668B1 (ko) 아연-철계 합금도금강판의 제조방법
JPH0730433B2 (ja) アルミニウムメッキ鋼板の製造方法
JP2808569B2 (ja) 塗装後耐食性に優れた合金化溶融亜鉛めっき鋼板の製造方法
JPH07150330A (ja) スプレーめっきによる合金化溶融亜鉛めっき鋼板の製造方法
JP2002047546A (ja) 溶融亜鉛めっき鋼板の製造設備
JP2003286556A (ja) 粉体塗装性に優れた合金化溶融亜鉛めっき鋼板
Agrawal Aluminizing of Steel by Gas Atomization Process
JPH07145468A (ja) スプレーめっきによる合金化溶融亜鉛めっき鋼板の製造方法
JPS60194053A (ja) 溶融亜鉛メツキ鋼板の製造方法
JPH03281764A (ja) 表面外観の優れた深絞り用合金化溶融亜鉛めっき鋼板の製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19920227

17Q First examination report despatched

Effective date: 19930719

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69106061

Country of ref document: DE

Date of ref document: 19950202

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990610

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990616

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990618

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000620

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000620

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010403