Device for use in a method for the production of a protective layer and method for the production of a protective layer

Abstract

A device for use in a method for the galvanic production of a protective layer featuring hard material particles on a component of a turbomachine, particularly a blade tip armoring of a blade tip of a rotor blade, is disclosed. The device includes a pouch-, bag- or sack-like receiving device for receiving the hard material particles and is made of a net-, screen- or non-woven-like material that is pervious to an electrochemical coating solution and has a mesh size smaller than the diameter of the hard material particles. The receiving device is designed such that it can be removably attached with an opening over and around a region of the component to be coated. A method for the galvanic production of a protective layer featuring hard material particles on a component of a turbomachine using a pouch-, bag- or sack-like receiving device filled with hard material particles, is also disclosed.

1 .- 19 . (canceled) 
     
     
         20 . A device for use in a method for galvanic production of a protective layer featuring hard material particles on a component of a turbomachine, comprising:
 a pouch-, bag- or sack-like receiving device for receiving hard material particles, wherein the receiving device is made of a net-, screen- or non-woven-like material that is pervious to an electrochemical coating solution and wherein the receiving device includes an opening;   an attachment base plate, wherein the receiving device is connected in a region of the opening to the attachment base plate such the opening corresponds with an opening in the attachment base plate; and   a cover, wherein the attachment base plate is removably fastenable to the cover, wherein the cover has an orifice for receiving the region of the component, and wherein the opening of the attachment base plate and the opening of the receiving device are positioned over the orifice.   
     
     
         21 . The device according to  claim 20 , wherein the opening of the receiving device is surrounded by a flexible seal. 
     
     
         22 . The device according to  claim 21 , wherein the seal is laminated into an edge of the opening. 
     
     
         23 . The device according to  claim 20 , wherein the opening of the attachment base plate is surrounded by a seal. 
     
     
         24 . The device according to  claim 20 , further comprising a fixation pin configured on a side of the attachment base plate opposite from the receiving device, wherein the fixation pin is insertable into a fixation opening of the cover. 
     
     
         25 . The device according to  claim 20 , wherein the cover has a fixation device. 
     
     
         26 . The device according to  claim 20 , wherein the orifice is surrounded by a seal with a positive fit. 
     
     
         27 . A method for galvanic production of a protective layer featuring hard material particles on a component of a turbomachine, comprising the steps of:
 a) attaching an opening of a pouch-, bag- or sack-like receiving device filled with hard material particles over and around a region of the component, wherein the receiving device is made of a net-, screen- or non-woven-like material that is pervious to an electrochemical coating solution and has a mesh size smaller than a diameter of the hard material particles;   b) placing a region of the component into an immersion bath with the electrochemical coating solution and applying a voltage for forming a metallic matrix layer on the region of the component with embedding of the hard material particles; and   c) galvanically forming a filler layer between the embedded hard material particles;   wherein the receiving device is connected in a region of the opening to an attachment base plate such that the opening of the receiving device corresponds with an opening in the attachment base plate;   wherein the attachment base plate is removably fastened to a cover;   and wherein the cover has an orifice within which the region of the component is received and the opening of the attachment base plate and the opening of the receiving device are positioned over the orifice.   
     
     
         28 . The method according to  claim 27 , wherein, in process step c), a rotation of the component is carried out around an axis of rotation, wherein the axis of rotation of runs horizontally. 
     
     
         29 . The method according to  claim 27 , wherein the cover is removably fastened to the component prior to process step a). 
     
     
         30 . The method according to  claim 27 , wherein the electrochemical coating solution used in process step b) contains nickel. 
     
     
         31 . The method according to  claim 27 , wherein the hard material particles are made of boron nitride, ceramic, titanium carbide, tungsten carbide, chromium carbide, aluminum oxide or zirconium oxide or a mixture thereof. 
     
     
         32 . The method according to  claim 27 , wherein the filler layer fills in spaces between the hard material particles and wherein the hard material particles are integrated with 65-90% of their volume into the filler layer. 
     
     
         33 . The method according to  claim 27 , further comprising the step of, prior to process step a), cleaning and/or covering of the region of the component and/or chemical pretreatment of the region of the component.