Wear components in a laminar structure in a paper of cardboard machine, and the procedure for its production and usage

Abstract

A wear component in a laminar structure, particularly one of a drainage strip, a deflector, a foil or a suction strip in a paper or a cardboard machine, where on at least one of its partial surfaces a medium that causes wear, in particular a fluid or a material web, such as machine clothing in the form of a sieve or a felt in the machine is applied. The wear component including a beam part being made of at least one of plastic, high-grade steel, copper, nickel, aluminum, zinc, and/or an alloy of the foregoing. The wear component also including an infeed area with an infeed angle β for the medium of less than 90° and at least one low-wear layer on at least one of the partial surfaces. The low-wear layer being made of a material from a class of self-fluxing alloys. The low-wear layer being at least partially thermally re-melted.

What is claimed is:  
     
         1 . A machine for the production of a fiber web including a wear component for at least a partial surface of a friction body to which a fiber medium is applied, said wear component comprising: 
 a beam part comprised of a metal selected from the group consisting of high-grade steel, copper, nickel, aluminum, zinc, and an alloy of the foregoing;    an infeed area with an infeed angle β for the medium of less than 90°; and    at least one low-wear layer on the friction body, said at least one low-wear layer being made of a material from a class of self-fluxing alloys, said low-wear layer being at least partially thermally re-melted.    
     
     
         2 . The wear component of  claim 1 , further comprising an other beam part comprised of plastic having at least one plate inserted therein, said plate comprised of said selected metal.  
     
     
         3 . The wear component of  claim 1 , wherein said infeed angle β is <45°.  
     
     
         4 . The wear component of  claim 1 , wherein said self-fluxing alloys include at least one of NiCrB, NiCrBSi, CoNiCrBSi and an additional self-fluxing alloy.  
     
     
         5 . The wear component of  claim 4 , wherein said low-wear layer additionally includes at least one hard material added to said self-fluxing alloy.  
     
     
         6 . The wear component of  claim 5 , wherein said low-wear layer additionally includes at least one of Fe, C and Mo.  
     
     
         7 . The wear component of  claim 4 , wherein said at least one hard material contains at least one of an oxide including at least one of Al 2 O 3 , Cr 2 O 3 , ZrO 2 , SiO 2  and TiO 2 , a carbide including at least one of WC and TiC, a boride including at least one of TiB 2 , Ti 2 B, ZrB, ZrB 2  and ZrB 12 , and a silicide.  
     
     
         8 . The wear component of  claim 1 , wherein said low-wear layer includes a re-melted layer having a thickness of from approximately 0.5 mm to approximately 2 mm.  
     
     
         9 . The wear component of  claim 8 , wherein said thickness is from approximately 0.75 mm to approximately 1.5 mm.  
     
     
         10 . The wear component of  claim 1 , wherein said low-wear layer has a porosity of from approximately 0% to approximately 10%  
     
     
         11 . The wear component of  claim 10 , wherein said porosity is from approximately 0.3% to approximately 5%.  
     
     
         12 . The wear component of  claim 1 , wherein said low-wear layer has a surface finish Ra from approximately 0.01 μm to approximately 10 μm.  
     
     
         13 . The wear component of  claim 12 , wherein said surface finish Ra is from approximately 0.01 μm to approximately 1 μm.  
     
     
         14 . The wear component of  claim 1 , wherein said low-wear layer has a surface finish Rz of from approximately 0.1 μm to approximately 10 μm.  
     
     
         15 . The wear component of  claim 14 , wherein said surface finish Rz is from approximately 0.5 μm to approximately 1 μm.  
     
     
         16 . The wear component of  claim 1 , wherein said low-wear layer has a hardness HU 1.0 of from approximately 3,000 N/mm 2  to approximately 15,000 N/mm 2 .  
     
     
         17 . The wear component of  claim 16 , wherein said hardness HU 1.0 is from approximately 5,000 N/mm 2  to approximately 10,000 N/mm 2 .  
     
     
         18 . The wear component of  claim 1 , wherein said low-wear layer has a hardness H plast of from approximately 5,000 N/mm 2  to approximately 30,000 N/mm 2 .  
     
     
         19 . The wear component of  claim 18 , wherein said hardness H plast is from approximately 5,500 N/mm 2  to approximately 20,000 N/mm 2 .  
     
     
         20 . The wear component of  claim 1 , wherein said low-wear layer has a hardness HV 0.1 of from approximately 650 to approximately 5,000.  
     
     
         21 . The wear component of  claim 20 , wherein said hardness HV 0.1 is from approximately 700 to approximately 2,500.  
     
     
         22 . The wear component of  claim 1 , wherein said low-wear layer has a length expansion coefficient from 20° C. to 250° C., of from approximately 8*10 −6  K −1  to approximately 9*10 −6  K −1 .  
     
     
         23 . The wear component of  claim 1 , wherein said low-wear layer is additionally applied to at least one surface area which borders the at least one partial surface, said at least one surface area including said infeed area.  
     
     
         24 . A procedure for the production of a wear component in a paper machine, where on at least one partial surface of the wear component a medium that causes wear is applied, the procedure comprising the steps of: 
 forming a beam part comprised of a metal selected from the group of high-grade steel, copper, nickel, aluminum, zinc, and an alloy of the foregoing;    thermal spray coating at least one low-wear layer onto the at least one partial surface of the wear component, said low-wear layer made of a material from a class of self-fluxing alloys; and    thermally re-melting at least a portion of said low-wear layer.    
     
     
         25 . The procedure of  claim 24 , further comprising the step of inserting a plate comprised of said selected metal into an other beam part, said other beam part comprised of plastic.  
     
     
         26 . The procedure of  claim 24 , wherein said material further includes at least one hard material added during said thermal spray coating step to said self-fluxing alloy for the creation of said low-wear layer.  
     
     
         27 . The procedure of  claim 24 , wherein said thermal spray coating step comprises the step of high-speed flame spraying (HVOF), by one of flame spraying, a plasma procedure and an autogenous procedure to create said low-wear layer.  
     
     
         28 . The procedure of  claim 24 , wherein said thermal re-melting step is performed with at least one of at least one burner, at least one laser beam, at least one arc, several high-power lamps, at least one coalescence oven and at least one induction heater.  
     
     
         29 . The procedure of  claim 24 , wherein said thermal spray coating step applies said low-wear layer to surface areas which border the at least one partial surface.  
     
     
         30 . The procedure of  claim 24 , wherein said low-wear layer is applied with a re-melted layer thickness of from approximately 0.5 mm to approximately 2 mm.  
     
     
         31 . The procedure of  claim 30 , wherein said thickness is from approximately 0.75 mm to approximately 1.5 mm.  
     
     
         32 . The procedure of  claim 24 , further comprising the step of forming a fibrous material suspension where machine clothing in the form of one of a sieve and a felt is positioned proximate to the wear component.