Method of producing titanium composite parts by means of casting and parts thus

Abstract

This method enables us to produce reinforced titanium composite parts with a low manufacturing cost and in which it is possible to control the percentage of reinforcement achieved on the basis of obtaining a titanium composite reinforcement material, formed preferably of titanium borides and/or carbides, by means of SHS techniques, and which is melted together with a consumable ingot of titanium or non-reinforced titanium alloy. The parts produced have a proportion of titanium boride and/or carbide which may range from 0% to 70% by weight.

1 . Method for producing titanium composite parts, by means of casting, which comprises the following operational stages: 
 Obtaining a titanium composite reinforcement material.    Obtaining a consumable ingot of titanium or non-reinforced titanium alloy.    Simultaneous melting of the reinforcement material and of the consumable ingot.    Casting of the melted composite in the corresponding mould in order to produce the composite piece in its final shape and dimensions.    
   
   
       2 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the reinforcement material is obtained by means of the self-propagated high-temperature synthesis method.  
   
   
       3 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the reinforcement material is a composite with titanium borides and/or carbides distributed in a titanium or titanium alloy matrix.  
   
   
       4 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the titanium composite which constitutes the reinforcement material has between 30-70% by weight of titanium boride and/or carbide, dispersed in titanium or titanium alloy.  
   
   
       5 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the consumable ingot is of titanium or titanium alloy.  
   
   
       6 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the consumable ingot is a cp-Ti grade 1, cp-Ti grade 2, cp-Ti grade 3, cp-Ti grade 4, Ti-0.05Pd, Ti-6Al-4V, Ti-5Al-2.5Fe, Ti-5Al-2.5Se, Ti-6Al-2Sn-4Zr-2Mo-0.1Si, Ti-5.8Al-4Sn-3.5Zr-0.5Mo-0.7Nb-0.35Si-0.06C, Ti 3 Al, Ti-14Al-11 Nb, Ti 2 AlNb, γ TiAl, or Ti(22-23)Al-(25-26)Nb(at %) alloy.  
   
   
       7 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the reinforcement material, which may be a single piece or divided up, and the consumable ingot are united prior to melting by a welding procedure.  
   
   
       8 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the reinforcement material, which may be a single piece or be divided up, and the consumable ingot are united prior to melting by mechanical means.  
   
   
       9 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the reinforcement material, which may be a single piece or be divided up, is inserted in one or more holes made in the consumable ingot.  
   
   
       10 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the melting is done by the vacuum electric arc and/or vacuum induction melting method.  
   
   
       11 . Method for producing titanium composite parts, by means of casting, according to  claim 1 , characterised in that the casting in moulds is done by means of a centrifuging or gravity filling process.  
   
   
       12 . A titanium composite part characterised in that it is produced by casting starting from a titanium composite reinforcement material and a consumable ingot of titanium or non-reinforced titanium alloy.  
   
   
       13 . A titanium composite part, according to  claim 12 , characterised in that the reinforcement material is a composite with titanium borides and/or carbides, dispersed in titanium or titanium alloy.  
   
   
       14 . A titanium composite part, according to  claim 12 , characterised in that it has a percentage of titanium boride and/or carbide above 0% and below 70% by weight, dispersed in titanium or titanium alloy.  
   
   
       15 . A titanium composite part, according to  claim 12 , characterised in that the reinforcement material is obtained by means of the self-propagated high-temperature synthesis technique.  
   
   
       16 . A titanium composite part, according to  claim 12 , characterised in that the titanium composite which constitutes the reinforcement material has 30-70% by weight of titanium boride and/or carbide, dispersed in titanium or titanium alloy.  
   
   
       17 . A titanium composite part, according to  claim 12 , characterised in that the consumable ingot is of titanium or titanium alloy.  
   
   
       18 . A titanium composite part, according to  claim 12 , characterised in that the consumable ingot is a cp-Ti grade 1, cp-Ti grade 2, cp-Ti grade 3, cp-Ti grade 4, Ti-0.05Pd, Ti-6Al-4V, Ti-5Al-2.5Fe, Ti-5Al-2.5Sn, Ti-6Al-2Sn-4Zr-2Mo-0.1Si, Ti-5.8Al-4Sn-3.5Zr-0.5Mo-0.7Nb-0.35Si-0.06C, Ti 3 Al, Ti-14Al-11 Nb, Ti 2 AlNb, γ TiAl, or Ti(22-23)Al-(25-26)Nb(at %) alloy.  
   
   
       19 . A titanium composite part, according to  claim 12 , characterised in that the reinforcement material, which may be a single piece or divided up, and the consumable ingot are united, prior to melting, by a welding procedure.  
   
   
       20 . A titanium composite part, according to  claim 12 , characterised in that the reinforcement material, which may be a single piece or divided up, and the consumable ingot are united, prior to melting, by mechanical means.  
   
   
       21 . A titanium composite part, according to  claim 12 , characterised in that, prior to melting, the reinforcement material, which may be a single piece or divided up, is inserted into one or more holes made in the consumable ingot.  
   
   
       22 . A titanium composite part, according to  claim 12 , characterised in that the melting is done by means of the vacuum induction melting and/or vacuum electric arc melting method.  
   
   
       23 . A titanium composite part, according to  claim 12 , characterised in that the casting in the moulds is done by means of a centrifuging or gravity filling method.