Method for producing a refractory composite material

Abstract

The present invention relates to producing refractory composite materials, practically poreless, and can be used for production of composite articles with increased size stability, wear resistance, high specific physico-mechanical properties and hardness, production of wear-resistant inserts in components and materials for tribo-technical purposes as well. The present method for producing a refractory composite material includes the steps of infiltration of a porous carbide work-piece by a metal resulting in preparation of an intermediate body, which is additionally treated in a melt of another metal at temperature exceeding the melting point of the metallic phase of the intermediate body, resulting in substitution of the metal in the intermediate body by the metal from the melt. The present invention extends the series of metals, which ban be introduced in composition of composite materials, and thus extends the application area of composite materials of this type.

1 . A method for producing a refractory composite material including the steps of infiltration of a porous carbide work-piece by a metal resulting in preparation of an intermediate body, characterized in that the intermediate body is additionally treated in a melt of another metal at temperature exceeding the melting point of the metallic phase of the intermediate body.  
   
   
       2 . A method according to  claim 1 , characterized in that the intermediate body is treated in a melt so that the metal from the melt is uniformly distributed in the refractory composite material.  
   
   
       3 . A method according to  claim 1 , characterized in that the intermediate body is treated in a melt so that the metal from the melt is nonuniformly distributed in the refractory composite material.  
   
   
       4 . A method according to  claim 1 , characterized in that as said porous carbide work-piece a work-piece is used prepared by pressing and sintering from carbide powders.  
   
   
       5 . A method according to  claim 1 , characterized in that a porous carbide work-piece is produced by pressing of powders of carbide forming elements or their mixtures, with subsequent treatment in a medium of hydrocarbons at a temperature exceeding their decomposition temperature and heat treatment at temperature 1200-1800 C.  
   
   
       6 . A method according to  claim 1 , characterized in that a porous workpiece is used with porosity 30-60% vol.  
   
   
       7 . A method according to  claim 1 , characterized in that a porous workpiece is used with a porosity uniformly distributed in volume.  
   
   
       8 . A method according to  claim 1 , characterized in that a porous carbide work-piece is used with a porosity non-uniformly distributed in volume.  
   
   
       9 . A method according to  claim 1 , characterized in that said porous carbide work-piece is infiltrated by dipping in a melt of metal or melting of a weighed sample of metal on its surface.  
   
   
       10 . A method according to  claim 1 , characterized in that before treatment the intermediate body is heated up to a temperature exceeding the melting point of a metal phase of the intermediate body.