EP1694912A1 - Outil dote de d'aretes et procede de fabrication associe - Google Patents

Outil dote de d'aretes et procede de fabrication associe

Info

Publication number
EP1694912A1
EP1694912A1 EP04820548A EP04820548A EP1694912A1 EP 1694912 A1 EP1694912 A1 EP 1694912A1 EP 04820548 A EP04820548 A EP 04820548A EP 04820548 A EP04820548 A EP 04820548A EP 1694912 A1 EP1694912 A1 EP 1694912A1
Authority
EP
European Patent Office
Prior art keywords
steel
edge
laser
doctor
edge portion
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.)
Withdrawn
Application number
EP04820548A
Other languages
German (de)
English (en)
Inventor
Maria Sundqvist
Bertil WALDÉN
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.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
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 Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of EP1694912A1 publication Critical patent/EP1694912A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • 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
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • 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
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates

Definitions

  • Scraper or cleaning blades denominated "doctor blades” are widely used in the paper and pulp industry for different purposes, but in most cases they have the function of 5 cleaning or scraping off material or left-overs from the surface of a rotary roller.
  • Such doctor blades have, for instance, the purpose of detaching a paper web from a stiff drying cylinder by scraping the surface of the cylinder.
  • the paper pulp contains filler such as silicon dioxide, great particles and paper fibers that wear out the doctor blade, the wear being substantially evenly distributed along the o edge, and wherein it holds that the rate of wear is greater than the rate of corrosion.
  • the doctor blade is seen as an article of consumption having very short service life, usually considerably smaller than one day. In many cases, it is exchanged already after approximately 5 hours.
  • doctor blades usually no regrinding of the doctor blade is carried out but it is discarded when consumed.5
  • doctor blades There are different principles in the paper mills for the use of doctor blades, with the same in general being worn-in initially for the formation of an edge. When the same has been formed, the wear is relatively even. The proper "in-siru"-grinding-in is assumed to have a quality-influencing effect on the manufactured paper. If the doctor blade is used in a later stage of the production process of paper, it influences the paper quality and the surface struc- o ture of the paper, and therefore it is seen as a very critical parameter.
  • the doctor blades may be of different length and vary between about 1 and 10 m.
  • An additional object of the present invention is to produce a scraper and/or cleaning blade of primarily doctor blade type, which possesses long service life and which in the paper manufacture imparts the paper a smooth and fine surface, free from scratches and other defects.
  • Figure 1 shows a perspective view of a doctor blade applied in direct connection to a roller so as to wiping off the paper pulp in the production of paper
  • Figure 2 shows an explanatory sketch of an edge-treated doctor blade according to the present invention
  • Figure 3 shows an explanatory sketch of a coated doctor blade edge according to the invention, seen from the side
  • Figure 4 shows an explanatory sketch of a laser-impregnated doctor blade edge according to the invention, seen from the side
  • Figure 5 shows an explanatory sketch showing laser coating of a doctor blade according to the invention.
  • the present invention relates to an edge-provided tool as well as a method for the manufacture thereof.
  • the invention relates to a type of tool that is called “doctor blade” and that is a wiping, scraper and/or cleaning tool used in, for instance, the manufacture of paper, in order to get a smooth and fine paper product free from scratches and other defects.
  • tools that usually are called coater blades, and also general knives, are comprised in the present invention.
  • the subject of the invention will below be designated “doctor blade”, in which concept also other denominations are intended to be comprised.
  • figure 1 shows a doctor blade 1, which abuts against a roller 2 and, for instance, scrapes away pulp from the same.
  • steel grades having a hardness of at least 450 HV have been selected.
  • An example of such a steel is a carbon steel having a composition comprising (in % by weight) 0,8-1,2 % of C, preferably about 1 % of C, 0,20-0,35 % of Si, 0,35-0,50 % of Mn, maximum 0,02 % of P, maximum 0,01 % of S, with Fe as balance and the content of some additional element in the periodic system in contents below 0,5 %.
  • Figures 2 and 3 show a steel strip 3, which on the edge thereof has been coated with a coating 4 by laser technique in accordance with the invention.
  • the coating is composed of, for instance, aluminum oxide or stellite (for instance stellite 12).
  • the laser technique is, per se. well known to a person skilled in the art and is visualized in Figure 5.
  • the atomic (also called "metallurgical") binding to the steel substrate characteristic of the invention is attained, which is visualized in Figure 3.
  • Figure 4 shows a doctor blade in cross-section, which has been coated with, for instance, TiC in accordance with the present invention.
  • the laser impregnation technique is described in the patent WO 99/56906.
  • the steel strip is designated 5 and the impregnation applied by means of laser technique is designated 6.
  • the particles/the carbides have penetrated into the steel substrate, whereby the limit between the two to a significant extent having been erased.
  • the coating has been effected with, for instance, aluminum oxide or stellite, such as in the figures 2 and 3, while the impregnation is carried out with suitable carbides and/or nitrides.
  • the surface-reinforcing portion in the formed edge portion of a strip-shaped doctor blade is provided in the way that, by means of laser technique, a coating, supplied by means of powder material 7, is applied to the edge under such supply of heat that the powder is fused with the basic material in the doctor blade, so that atomic and metallurgical binding arise.
  • the supply of heat takes place by means of a laser gun 8, a coating
  • the supplied material in the flow of powder 7 suitably con- sists of a refractory material, such as aluminum oxide.
  • a material such as stellite may be used.
  • the coating 9 it is important that the material can undergo a quick cooling, so that a desired fine structure is obtained, which is characterized by both toughness and hardness, more closely defined to a level of hardness corresponding to 850-1300 HV. In this way, simultaneously high bearing strength in the surface layer is attained at the same time as requirements of low friction and desired corrosion resistance can be fulfilled.
  • the coating may essentially be composed of aluminum oxide or stellite.
  • the coating may also contain or be composed of other refractory materials, such as metallic oxides, metallic silicates, metallic carbides, metallic borides, metallic nitrides and mixtures thereof.
  • refractory materials such as metallic oxides, metallic silicates, metallic carbides, metallic borides, metallic nitrides and mixtures thereof.
  • ceramic materials are selected among aluminum oxide, chromic oxide, zirconium oxide, wolfram carbide, chromium carbide, zirconium carbide, tantalum carbide, titanium carbide, titanium nitride, niobium carbide and borides.
  • a laser impregnation may also be carried out by, for instance, carbides and nitrides such as TiC, NbC and TiN being added to the surface of the base material during the laser treatment.
  • the particles are added by spraying under high gas pressure at the same time as the laser beam locally melts the surface layer on the material so that the wear-resistant particles can penetrate into the substrate. Furthermore, the laser coating may be effected in a plurality of rounds, so that multiple layers are obtained.
  • the steel strip then receives a very wear-resistant surface.
  • the thickness of the steel strip is the normal one for doctor blades in the paper industry and may vary between 0,2 and 3 mm, suitably between 0,305 and 1,27 mm.
  • the thickness of the coating or the impregnation may suitably be between 5 and 15 % of the thickness of the steel strip.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un outil doté d'arêtes, tel qu'une racle, utilisé comme outil d'essuyage à différentes étapes de la production de pâte et/ou de papier. Cet outil est constitué d'une bande d'acier dont la partie arête est recouverte d'un revêtement antiusure appliqué au moyen d'une technique laser, de sorte à former une liaison métallurgique entre ledit revêtement et la bande de métal, une dureté de surface supérieure à 850 HV étant obtenue. Les racles antiusure selon l'invention présentent ainsi une longue durée de vie.
EP04820548A 2003-12-19 2004-12-10 Outil dote de d'aretes et procede de fabrication associe Withdrawn EP1694912A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0303516A SE526191C2 (sv) 2003-12-19 2003-12-19 Eggförsett verktyg och metod för framställning därav
PCT/SE2004/001839 WO2005059246A1 (fr) 2003-12-19 2004-12-10 Outil dote de d'aretes et procede de fabrication associe

Publications (1)

Publication Number Publication Date
EP1694912A1 true EP1694912A1 (fr) 2006-08-30

Family

ID=30768834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04820548A Withdrawn EP1694912A1 (fr) 2003-12-19 2004-12-10 Outil dote de d'aretes et procede de fabrication associe

Country Status (8)

Country Link
US (1) US20070158045A1 (fr)
EP (1) EP1694912A1 (fr)
JP (1) JP2007521421A (fr)
KR (1) KR20060123304A (fr)
CN (1) CN1894468A (fr)
CA (1) CA2550107A1 (fr)
SE (1) SE526191C2 (fr)
WO (1) WO2005059246A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7431801B2 (en) * 2005-01-27 2008-10-07 The Procter & Gamble Company Creping blade
DE102005062911B4 (de) * 2005-12-29 2007-10-25 Böhler-Uddeholm Precision Strip GmbH & Co. KG Komposit-Rakelklinge mit pulvermetallurgisch hergestellter Arbeitskante
EP1878565A1 (fr) * 2006-07-13 2008-01-16 BTG Eclépens S.A. Lame de crépage
US7691236B2 (en) * 2006-07-26 2010-04-06 The Procter + Gamble Company Creping blade with a highly smooth bevel surface
WO2009100344A2 (fr) * 2008-02-08 2009-08-13 Kadant Web Systems, Inc. Surfaces thermiquement adaptatives pour recevoir des pulvérisations thermiques
DE102009029699A1 (de) * 2009-09-23 2011-03-24 Voith Patent Gmbh Klingenbeschichtung
AT508771B1 (de) * 2009-11-05 2011-04-15 Busatis Gmbh Messer zur tangentialen entfernung einer oberfläche eines werkstücks
SE535064C2 (sv) * 2010-08-23 2012-04-03 Sandvik Intellectual Property Kallvalsad och härdad bandstålsprodukt
DE102010062901A1 (de) * 2010-12-13 2012-06-14 Voith Patent Gmbh Imprägnierte Klingenbeschichtung
US20140000467A1 (en) * 2011-03-18 2014-01-02 Allan Lunnerfjord Blade shaped tool and method for its manufacturing
CN104294268B (zh) * 2014-09-06 2016-10-26 北京工业大学 一种耐磨导辊制备方法
EP3225736A1 (fr) 2016-03-31 2017-10-04 BTG Eclépens S.A. Lame d'enduction masquée
CN106001559A (zh) * 2016-05-13 2016-10-12 武汉苏泊尔炊具有限公司 刀具及其制备方法
CN109594074A (zh) * 2019-01-30 2019-04-09 沈阳大陆激光工程技术有限公司 一种用于激光制造的无磁耐磨材料

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509640A1 (fr) * 1981-07-17 1983-01-21 Creusot Loire Procede de fabrication d'une piece metallique composite et produits obtenus
EP0542729B1 (fr) * 1986-10-17 1996-05-22 Board Of Regents, The University Of Texas System Procédé et installation de production d'ébauches par frittage sélectif
DE4139105C2 (de) * 1991-11-28 1994-03-24 Cerasiv Gmbh Verwendung einer PSZ-Keramik mit Zusatz von Spinell als Verschleißbauteil
FR2698885A1 (fr) * 1992-12-04 1994-06-10 Inst Nat Polytech Grenoble Procédé de traitement de surface de substrats métalliques et revêtements durs ainsi obtenus.
FR2750907B1 (fr) * 1996-07-12 1998-09-18 Technogenia Couteau d'ecorcage, et procede pour sa realisation
DE19931948B4 (de) * 1999-07-09 2004-11-11 Zwilling J. A. Henckels Ag Verfahren zur Herstellung einer Klinge eines Schneidwerkzeuges und damit hergestelltes Erzeugnis
US6423427B1 (en) * 2000-10-26 2002-07-23 Kadant Web Systems, Inc. Composite doctor blade and its method of manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005059246A1 *

Also Published As

Publication number Publication date
JP2007521421A (ja) 2007-08-02
SE526191C2 (sv) 2005-07-26
CA2550107A1 (fr) 2005-06-30
KR20060123304A (ko) 2006-12-01
WO2005059246A1 (fr) 2005-06-30
US20070158045A1 (en) 2007-07-12
SE0303516L (sv) 2005-06-20
SE0303516D0 (sv) 2003-12-19
CN1894468A (zh) 2007-01-10

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