New product and use thereof

Abstract

The present invention relates to a new pre-alloyed metal based powder, intended to be used in surface coating of metal parts. The powder is deposited using e.g. laser cladding or plasma transfer arc welding (PTA), or thermal spray (e.g. HVOF). The powder is useful for reducing friction and improving wear reducing properties of the deposited coating. Such coatings may also improve machinability. As friction or wear reducing component, inclusions of manganese sulphide or tungsten sulphide in the pre-alloyed powder may be used.

1 . A powder mixture containing:
 i) atomised metal powder having the following composition: C, 0.05-0.5%;
 Si, 2.0-4.0%; 
 B, 0.8-1.3%; 
 Cr, 2-10%; 
 Fe, 3-15%; 
 Al, 0.3-0.5%; 
 Mn, 5-15%; 
   the balance being Ni,   ii) atomised metal powder having the following composition: C, 0.05-0.2%;
 Si, 2.2-2.9%; 
 B, 0.8-1.3%; 
 Cr, 2.8-3.45%; 
 Fe, 1.4-2.3%; 
 Al, 0.3-0.5%; 
 S, 3-13%; 
 the balance being Ni, and 
   iii) atomised metal powder having the following composition: C, 0.2-0.27%;
 Si, 3.5%; 
 B, 1.6; 
 Fe, 2.5; 
 Cr, 7.5; 
 the balance being Ni. 
   
     
     
         2 . The powder mixture according to  claim 1 , wherein the ratio between the powders are such that the amount of MnS is 4-15%. 
     
     
         3 . A metal powder according to  claim 1 , wherein the particle size of the prealloyed powder is from 45 μm to 200 mm. 
     
     
         4 . A method for surface coating metal parts, by way of laser cladding or PTA (plasma transferred arc), with a metal powder according to  claim 1  thereby producing a metal coated component.