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SE526191C2 - Egg-provided tools and methods for making them - Google Patents

Egg-provided tools and methods for making them

Info

Publication number
SE526191C2
SE526191C2 SE0303516A SE0303516A SE526191C2 SE 526191 C2 SE526191 C2 SE 526191C2 SE 0303516 A SE0303516 A SE 0303516A SE 0303516 A SE0303516 A SE 0303516A SE 526191 C2 SE526191 C2 SE 526191C2
Authority
SE
Sweden
Prior art keywords
steel
laser
edge
edge portion
doctor blade
Prior art date
Application number
SE0303516A
Other languages
Swedish (sv)
Other versions
SE0303516L (en
SE0303516D0 (en
Inventor
Maria Sundqvist
Bertil Walden
Original Assignee
Sandvik 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 Ab filed Critical Sandvik Ab
Priority to SE0303516A priority Critical patent/SE526191C2/en
Publication of SE0303516D0 publication Critical patent/SE0303516D0/en
Priority to PCT/SE2004/001839 priority patent/WO2005059246A1/en
Priority to EP04820548A priority patent/EP1694912A1/en
Priority to KR1020067011464A priority patent/KR20060123304A/en
Priority to CA002550107A priority patent/CA2550107A1/en
Priority to JP2006545281A priority patent/JP2007521421A/en
Priority to CNA2004800378838A priority patent/CN1894468A/en
Priority to US10/583,207 priority patent/US20070158045A1/en
Publication of SE0303516L publication Critical patent/SE0303516L/en
Publication of SE526191C2 publication Critical patent/SE526191C2/en

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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

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

The invention relates to an edge-provided tool, such as a doctor blade, for use as wiping tool in the production of pulp and/or paper in different stages of the production process. It consists of an edge-provided strip of steel, the edge portion of which has been provided with a wear-resistant coating applied by means of laser technique, so that metallurgical binding is present between said coating and the steel strip, whereby a level of surface hardness of more than 850 UV being attained. Thereby, wear-resistant doctor blades having a long service life have been obtained.

Description

0000 0000 0 00 00 0 I 0 000 0000 0 0 0 000 00 nik är inriktad på tillhandahållandet av en nötningsresistent beläggning på den del av bladet som kommer i kontakt med ytan av en roterande cylinder. 0000 0000 0 00 00 0 I 0 000 0000 0 0 0 000 00 nik is focused on the provision of an abrasion resistant coating on the part of the blade which comes into contact with the surface of a rotating cylinder.

Enligt känd teknik, i syfte att förbättra det eggförsedda verktygets egenskaper, livslängd och därmed påverkan på papperskvaliteten, nyttjas bland annat termisk (varm) 5 sprutning med HVOF Cfiigh Xelocity Qxygen ljuel”). Metoden ger sintring av tillsats- materialet och så kallad diffusionsbindning vid cirka 1000°C. Problem med denna be- läggningsmetod är sprickor, porer, dålig bindhållfasthet, vidhäfiningsproblem, etc. Ma- terial som idag sprutas är keramer, såsom Al2O3.According to known technology, in order to improve the properties of the edge-provided tool, service life and thus the effect on the paper quality, thermal (hot) spraying with HVOF C igh Xelocity Qxygen ljuel ”is used, among other things. The method provides sintering of the additive material and so-called diffusion bonding at about 1000 ° C. Problems with this coating method are cracks, pores, poor bond strength, adhesion problems, etc. Materials that are sprayed today are ceramics, such as Al2O3.

Det är mot bakgnmd härav ett syfte med föreliggande uppfinning att kunna till- 1 0 handahålla ett eggförsett verktyg, såsom en schaber, vilket verktyg försetts med en be- läggning med bättre vidhäftningsfönnåga än hos hittills kända verktyg. Samtidigt ska eljest uppkommande formförändxingar hos verktyget försöka minimeras, samtidigt som önskade finhetskrav och frånvaro av repor på den färdiga pappersprodukten ska kunna tillgodoses. Vidare ska den genom ytbehandlingen gjorda energitillfórseln eller värme- l 5 påverkan av grundmaterialet i möjligaste mån minimeras.In view of this, it is an object of the present invention to be able to provide an edge-provided tool, such as a doctor blade, which tool is provided with a coating with better adhesion ability than hitherto known tools. At the same time, otherwise occurring deformations of shape of the tool must try to be minimized, at the same time as the desired unit requirements and the absence of scratches on the finished paper product must be able to be met. Furthermore, the energy supply or heat impact of the base material made through the surface treatment must be minimized as far as possible.

Ytterligare ett syfte med föreliggande uppfinning är att frambringa ett skrap- och/eller rengöringsblad av i främsta hand schaber-typ, som besitter lång livslängd och som vid papperstillverkning förlänar papperet en slät och fin yta, fi'i från repor och andra defekter. 2 0 Dessa och ytterligare syften har på ett överraskande sätt lyckats uppnås genom att förse verktyget med de i de självständiga patentkraven angivna särdragen. Föredrag- na utföringsformer av föreliggande uppfinning finns definierade i de osj älvständiga pa- tentkraven.A further object of the present invention is to produce a scraper and / or cleaning blade of primarily scraper type, which has a long service life and which in papermaking gives the paper a smooth and smooth surface, from scratches and other defects. These and further objects have surprisingly been achieved by providing the tool with the features set forth in the independent claims. Preferred embodiments of the present invention are defined in the independent claims.

Uppfinníngen kommer nedan att närmare beskrivas i anslutning till ritningsfigu- 0 000 0 00 N U1 rerna, där Figur 1 visar en perspektivvy av en schaber anbragd i direkt anslutning till en vals i och för avstrykning av pappersmassan vid tillverkning av papper; Figur 2 visar en principskiss av en eggbehandlad schaber enligt föreliggande I I 0 000 0 00 000 uppfinning; 0 0 00 0 U) Ö Figur 3 visar en principskiss av en belagd schaberegg enligt uppfinningen, sedd från sidan; f- Ir (f: f! za: :oo:a :n :ooz 00:: .E .ao: .en 00:: :- z l Figur 4 visar en principskiss av en laserimpregnerad schaberegg enligt uppfin- ningen, sedd från sidan; och Figur 5 visar en principskiss visande laserbeläggrring av en schaber enligt upp- finningen.The invention will be described in more detail below in connection with the drawings, in which Figure 1 shows a perspective view of a scraper arranged in direct connection with a roller for wiping the pulp in the manufacture of paper; Figure 2 shows a schematic diagram of an edge-treated scraper according to the present invention; 0 3 00 0 U) Ö Figure 3 shows a principle sketch of a coated doctor blade according to the invention, seen from the side; f- Ir (f: f! za:: oo: a: n: ooz 00 :: .E .ao: .en 00 ::: - zl Figure 4 shows a principle sketch of a laser-impregnated doctor blade according to the invention, seen from and Figure 5 shows a schematic diagram showing laser coating of a scraper according to the invention.

Föreliggande uppfinning avser sålunda ett eggförsett verktyg samt en metod för framställning därav. Närmare angivet, avser uppfinningen en typ av verktyg, som kallas ”schaber” och som är ett avstryknings-, skrap- och/eller rengöringsverktyg som används vid exempelvis tillverkning av papper, för att få en slät och fin pappersprodukt fri från repor och andra defekter. Även verktyg som vanligtvis kallas raklar, samt även knivar i allmänhet, innefattas i föreliggande uppfinning. I syfte att underlätta beskrivningen av uppfinningen, kommer dock nedan uppfinningsföremålet att betecknas ”schaber”, i vil- ket begrepp även andra benämningar avses innefattas.The present invention thus relates to an edge-provided tool and a method for manufacturing the same. More specifically, the invention relates to a type of tool, called a "scraper", which is a scraping, scraping and / or cleaning tool used in, for example, the manufacture of paper, to obtain a smooth and paper product free from scratches and other defects. . Tools commonly referred to as squeegees, as well as knives in general, are also included in the present invention. In order to facilitate the description of the invention, however, the object of invention will hereinafter be referred to as “creator”, in which concept other names are also intended to be included.

Figur l visar således en schaber 1 som anligger mot en vals 2 och exempelvis skrapar bort pappersmassa fiån denna. Som ett föredraget exempel på material som visat sig fungera väl för att enligt uppfinningen belägga materialets eggparti medelst lasertek- nik, har utvalts stålsorter med en hårdhet på minst 450 HV. Ett exempel på sådant stål är ett kolstål med en sammansättning innefattande (i vikt-%) 0,8 - 1,2% C, företrädesvis cirka 1% C, 0,20 - 0,35% Si, 0,35 - 0,50% Mn, maximalt 0,02% P, maximalt 0,01% S, med Fe som återstod och halten av något ytterligare element i periodiska systemet i hal- ter understigande 0,5 %.Figure 1 thus shows a doctor blade 1 which abuts against a roller 2 and, for example, scrapes away pulp from it. As a preferred example of material which has been found to work well for coating the edge portion of the material by means of laser technology, steel grades with 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% C, preferably about 1% C, 0.20 - 0.35% Si, 0.35 - 0, 50% Mn, maximum 0.02% P, maximum 0.01% S, with Fe remaining and the content of any additional element in the periodic table in levels below 0.5%.

Figur 2 och 3 visar ett stålband 3 som på sin egg belagts med laserteknik i enlig- het med uppfinningen med en beläggning 4. Därvid höjs nötningsbeständigheten vä- sentligt. Beläggningen består exempelvis av aluminiumoxid eller stellit (exempelvis stellit 12). Lasertekniken är i sig välkänd för fackmarmen och åskådliggörs i Figur 5.Figures 2 and 3 show a steel strip 3 which has been coated on its edge with laser technology in accordance with the invention with a coating 4. The abrasion resistance is thereby significantly increased. The coating consists, for example, of alumina or stellite (eg stellite 12). The laser technology is in itself well known to the skilled artisan and is illustrated in Figure 5.

Vid laserbeläggningen uppnås den för uppfinningen karakteristiska atomära (även kallad ”metallurgiska”) bindningen till stålsubstratet, vilket åskådliggörs i Figur 3.During the laser coating, the atomic (also called “metallurgical”) characteristic of the invention is achieved to the steel substrate, which is illustrated in Figure 3.

Figur 4 visar en schaber i tvärsnitt, vilken belagts med exempelvis TiC i enlighet med föreliggande uppfinning. Laserimpregneringstekniken finns beskriven i patentet WO 99/ 56906. Stålbandet är betecknat med 5 och den medelst laserteknik påförda imp- regneringen med 6. Även i denna figur åskådliggörs att partiklama/karbiderna trängt in i stålsubstratet varvid gränsen mellan de båda i betydande utstäckning suddats ut. Belägg- 10 15 20 ningen har skett med exempelvis aluminiumoxid eller stellit, såsom i figurerna 2 och 3, medan impregneringen sker med lämpliga karbider och/eller nitrider.Figure 4 shows a doctor blade in cross section, which is coated with, for example, TiC in accordance with the present invention. The laser impregnation technique is described in patent WO 99/56906. The coating has been done with, for example, alumina or stellite, as in Figures 2 and 3, while the impregnation takes place with suitable carbides and / or nitrides.

Enligt Figur 5 åstadkommes det ytíörstärkande partiet i en bandformad schabers utbildade eggparti därigenom att man medelst laserteknik påtör eggen en beläggning som tilltöres medelst pulvermaterial 7 under sådan värmetilltörsel att pulvret smälts samman med grundmaterialet i schabern, så att atomär och metallurgisk bindning upp- står. Värmetilltörseln sker medelst en laserkanon 8, varvid en beläggning 9 åstadkom- mes på substratet. Det tillfórda materialet i pulverflödet 7 utgörs lämpligen av ett re- fiaktärt material, såsom aluminiumoxid. Alternativt kan ett material som stellit använ- das. I anslutning till att beläggningen 9 pålagts schabern, är det viktigt att materialet får undergå en snabb avsvalning, så att önskvärd fin struktur erhålles, vilken karakteriseras av både seghet och hårdhet, närmare angivet till en hårdhetsnivå motsvarande 850 - 1300 HV. Härigenom uppnås samtidigt hög bärighet i ytskiktet samtidigt som krav på låg friktion och önskat korrosionsmotstånd kan infrias.According to Figure 5, the surface-reinforcing portion of a band-shaped doctor blade formed edge portion is provided by applying to the edge a coating applied to the edge by means of powder material 7 under such heat supply that the powder fuses with the base material of the doctor blade, so that atomic and metallurgical bonding. The heat is supplied by means of a laser gun 8, whereby a coating 9 is provided on the substrate. The feed material in the powder 7 7 is suitably composed of a reactive material, such as alumina. Alternatively, a material that has been rigid can be used. In connection with the coating 9 being applied to the doctor blade, it is important that the material is subjected to a rapid cooling, so that the desired structure is obtained, which is characterized by both toughness and hardness, specified to a hardness level corresponding to 850 - 1300 HV. In this way, high bearing capacity in the surface layer is achieved at the same time, while requirements for low friction and the desired corrosion resistance can be met.

Såsom nänmts ovan, kan beläggningen bestå huvudsakligen av aluminiumoxid eller stellit. Beläggningen kan dock även innehålla eller bestå av andra refraktära mate- rial, såsom metalloxider, metallsilikater, metallkarbider, metallborider, metallnitrider och blandningar därav. Speciellt föredragna keramiska material är utvalda bland alumi- niumoxid, kromoxid, zirkoniumoxid, volfrarnkarbid, kromkarbid, zirkoníumkarbid, tantalkarbid, titankarbid, titannitrid, niobkarbid och borider.As mentioned above, the coating may consist mainly of alumina or stellite. However, the coating may also contain or consist of other refractory materials, such as metal oxides, metal silicates, metal carbides, metal borides, metal nitrides and mixtures thereof. Particularly preferred ceramic materials are selected from alumina, chromium oxide, zirconia, tungsten carbide, chromium carbide, zirconium carbide, tantalum carbide, titanium carbide, titanium nitride, niobium carbide and borides.

Såsom nämnts ovan kan även en laserimpregnering genomföras genom att ex- empelvis karbider och nitrider såsom TiC, NbC och TiN tillsätts till grundmaterialets yta under laserbehandlingen. Partiklarna tillsätts genom sprutning under högt gastryck samtidigt som laserstrålen lokalt smälter ytskiktet på materialet så att de nötningsbe- ständiga partiklarna kan tränga in i substratet. Vidare kan laserbeläggningen ske i flera omgångar, så att multipla skikt erhålles. Stålbandet får då en mycket nötningsbeständig yta. V Stålbandets tjocklek är det normala för schabrar inom pappersindustrin och kan variera mellan 0,2 och 3 mm, lämpligen mellan 0,305 och 1,27 mm. Beläggningens eller impregneringens tjocklek kan lämpligen ligga mellan 5 och 15% av stålbandets tjocklek.As mentioned above, a laser impregnation can also be carried out by adding, for example, carbides and nitrides such as TiC, NbC and TiN 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 of the material so that the abrasion-resistant particles can penetrate into the substrate. Furthermore, the laser coating can be done in fl your rounds, so that multiple layers are obtained. The steel strip then has a very abrasion-resistant surface. V The thickness of the steel strip is normal for scrapers in the paper industry and can vary between 0.2 and 3 mm, suitably between 0.305 and 1.27 mm. The thickness of the coating or impregnation may suitably be between 5 and 15% of the thickness of the steel strip.

Claims (1)

1. 0 15 20 25 30 PATENTKRAV . Schaber eller rakel för användning som avstryknings-, skrap- och/eller rengöringsredskap vid tillverkning av pappersmassa och/eller papper i olika skeden av tillverkningsprocessen, bestående av ett eggförsett band av stål, vars eggparti försetts med en nötningsbeständig beläggning, kännetecknat därav, att eggpartiet är belagt med en medelst laserteknik påförd ytförstärkande beläggning, så att metallurgisk bindning föreligger mellan nämnda nötningsbeständiga beläggning och stålbandet, varvid eggpartiet uppvisar en hårdhet på över 1000 HV. . Schaber eller rakel enligt patentkrav 1, kännetecknar därav, att den nötningsbeständiga beläggningen uppvisar en ythårdhetsnivå på minst 850 HV. . Schaber eller rakel enligt patentkrav 1, kännetecknat därav, att eggpartiet uppvisar ett medelst laserbeläggning pålagt ytskikt, vars tjocklek utgör 5-15 % av schaberns eller rakelns tjocklek. . Schaber eller rakel enligt patentkrav l, kännetecknar därav, att eggpartiet uppvisar ett medelst laserbeläggning eller laserimpregnering pålagt ytförstärkande parti, vars tjocklek utgör 5-15 % av schabems eller rakelns tjocklek. . Schaber eller rakel enligt något av föregående krav, kännetecknar därav, att stålet är ett kolstål med en kemisk sammansättning i vikt-% 0,8-1,2 % C, företrädesvis cirka 1 % C, 0,20-0,35 % Si, 0,35-0,50 % Mn, maximalt 0,02 % P, maximalt 0,01 % S, med Fe som återstod och halten av något ytterligare element i periodiska systemet i halter understigande 0,5 %. . Metod för tillverkning av en schaber eller rakel enligt något av kraven 1-5, kännetecknar därav, att ett av stål tillverkat material först utvalsas och eggbehandlas till uppvisande av ett längs ena kanten utbildat eggparti och att nämnda eggparti därefter förses med ett medelst laserteknik påfört 10 15 20 25 30 ytförstärkande skikt, på sådant sett att en metallurgisk bindning uppstår mellan närrmda skikt och det underliggande stâlsubstratct, varvid eggbehandlingen åstadkommes därigenom att stålsubstratet underkastas en laserbehandling under tillförsel av pulver vid sådan värmetillförsel att pulvret smälts samman med stålsubstratet till bildande av en atomär/metallurgisk bindning. . Metod för tillverkning av en schaber eller rakel enligt något av kraven 1-5, kännetecknat därav, att ett av stål tillverkat material först utvalsas och eggbehandlas till uppvisande av ett längs ena kanten utbildat eggparti och att nämnda eggparti därefter förses med ett medelst laserteknik påfört ytförstärkande skikt, på sådant sett att en metallurgisk bindning uppstår mellan nämnda skikt och det underliggande stålsubstratet, varvid eggbehandlingen åstadkommes därigenom att stålsubstratet underkastas en laser impregnering och upplegering, varvid materialpartiklar av ett keramiskt material skjuts in i den medelst laser smälta ytan, så att en atomär/metallurgisk bindning uppstår. . Metod enligt krav 6 eller 7, kännetecknar därav, att det tillförda pulvret huvudsakligen innehåller aluminiumoxid. . Metod enligt krav 6 eller 7, kännetecknat därav, att det tillförda materialet huvudsakligen innehåller stellit. 10. Metod enligt krav 7-9, kännetecknar därav, att impregneringen utförs genom att karbider och nitrider, såsom TiC, NbC och/eller TiN, tillförs stålsubstratet. . Metod enligt något av kraven 6-10, kännetecknar därav, att stålets kemiska sammansättning i vikt-% är 0,8-1,2 % C, företrädesvis cirka 1 % C, 0,20-0,35 % Si, 0,35-0,50 % Mn, maximalt 0,02 % P, maximalt 0,01 % S, med Fe som återstod och halten av något ytterligare element i periodiska systemet i halter understigande 0,5 %. . Metod enligt något av kraven 6-11, kännetecknar därav, att den nötningsbeständiga beläggningen uppvisar en ythårdhetsnivå över 850 HV.1. 0 15 20 25 30 PATENT REQUIREMENTS. Scraper or squeegee for use as a scraping, scraping and / or cleaning tool in the manufacture of pulp and / or paper at various stages of the manufacturing process, consisting of a steel edged strip, the edge portion of which is provided with an abrasion resistant coating, characterized in that the edge portion is coated with a surface-reinforcing coating applied by means of laser technology, so that metallurgical bonding exists between said abrasion-resistant coating and the steel strip, the edge portion having a hardness of more than 1000 HV. . Scraper or doctor blade according to Claim 1, characterized in that the abrasion-resistant coating has a surface hardness level of at least 850 HV. . Scraper or doctor blade according to Claim 1, characterized in that the edge portion has a surface layer applied by means of a laser coating, the thickness of which is 5-15% of the thickness of the doctor blade or doctor blade. . Scraper or squeegee according to Claim 1, characterized in that the edge portion has a surface-reinforcing portion applied by means of a laser coating or laser impregnation, the thickness of which is 5-15% of the thickness of the scraper or squeegee. . A doctor blade or squeegee according to any one of the preceding claims, characterized in that the steel is a carbon steel with a chemical composition in weight% 0.8-1.2% C, preferably about 1% C, 0.20-0.35% Si , 0.35-0.50% Mn, maximum 0.02% P, maximum 0.01% S, with Fe remaining and the content of any additional element in the periodic table in levels below 0.5%. . Method for manufacturing a doctor blade or squeegee according to any one of claims 1-5, characterized in that a material made of steel is first rolled and edge-treated to have an edge portion formed along one edge and that said edge portion is then provided with a laser technique applied. Surface reinforcing layer, in such a way that a metallurgical bond is formed between the adjacent layers and the underlying steel substrate, the edge treatment being effected by subjecting the steel substrate to a laser treatment during the application of powder in such a heat supply that the powder fuses with the steel substrate. / metallurgical bonding. . Method for manufacturing a doctor blade or squeegee according to any one of claims 1-5, characterized in that a steel-made material is first rolled and edge-treated to have an edge portion formed along one edge and that said edge portion is then provided with a surface reinforcing applied by means of laser technology. layer, in such a way that a metallurgical bond is formed between said layer and the underlying steel substrate, the edge treatment being effected by subjecting the steel substrate to a laser impregnation and alloying, whereby material particles of a ceramic material are pushed into the laser molten surface, so that an atomic / metallurgical bonding occurs. . Method according to Claim 6 or 7, characterized in that the supplied powder mainly contains alumina. . Method according to claim 6 or 7, characterized in that the supplied material mainly contains stellite. Method according to claims 7-9, characterized in that the impregnation is carried out by adding carbides and nitrides, such as TiC, NbC and / or TiN, to the steel substrate. . Method according to one of Claims 6 to 10, characterized in that the chemical composition of the steel in% by weight is 0.8-1.2% C, preferably about 1% C, 0.20-0.35% Si, 0.35 -0.50% Mn, maximum 0.02% P, maximum 0.01% S, with Fe remaining and the content of any additional element in the periodic table in levels below 0.5%. . Method according to one of Claims 6 to 11, characterized in that the abrasion-resistant coating has a surface hardness level above 850 HV.
SE0303516A 2003-12-19 2003-12-19 Egg-provided tools and methods for making them SE526191C2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE0303516A SE526191C2 (en) 2003-12-19 2003-12-19 Egg-provided tools and methods for making them
PCT/SE2004/001839 WO2005059246A1 (en) 2003-12-19 2004-12-10 Edge-provided tool and method for the manufacture thereof
EP04820548A EP1694912A1 (en) 2003-12-19 2004-12-10 Edge-provided tool and method for the manufacture thereof
KR1020067011464A KR20060123304A (en) 2003-12-19 2004-12-10 Tool provided with a blade and method of manufacturing the tool
CA002550107A CA2550107A1 (en) 2003-12-19 2004-12-10 Edge-provided tool and method for the manufacture thereof
JP2006545281A JP2007521421A (en) 2003-12-19 2004-12-10 Tool with an edge and method for manufacturing the same
CNA2004800378838A CN1894468A (en) 2003-12-19 2004-12-10 Edge-provided tool and method for the manufacture thereof
US10/583,207 US20070158045A1 (en) 2003-12-19 2004-12-10 Edge-provided tool and method for the manufacture thereof

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SE0303516A SE526191C2 (en) 2003-12-19 2003-12-19 Egg-provided tools and methods for making them

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SE0303516L SE0303516L (en) 2005-06-20
SE526191C2 true SE526191C2 (en) 2005-07-26

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

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SE0303516L (en) 2005-06-20
WO2005059246A1 (en) 2005-06-30
CA2550107A1 (en) 2005-06-30
JP2007521421A (en) 2007-08-02
KR20060123304A (en) 2006-12-01
US20070158045A1 (en) 2007-07-12
EP1694912A1 (en) 2006-08-30
CN1894468A (en) 2007-01-10
SE0303516D0 (en) 2003-12-19

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