Titanium alloy complex powder containing ceramic and process for production thereof, consolidated titanium alloy material using this powder and process for production thereof

Abstract

Titanium alloy complex powder is yielded by hydrogenating titanium alloy raw material to generate hydrogenated titanium alloy, grinding and sifting it to obtain hydrogenated titanium alloy powder, adding ceramic powder selected from SiC, TiC, SiO x , TiO x (here, index x is a real number which is in 1≦x≦2) and Al 2 O 3 , and dehydrogenating the mixture of the hydrogenated titanium alloy powder and the ceramic powder. In addition, consolidated titanium alloy material is obtained by CIP process and subsequent HIP process to the titanium alloy complex powder or by HIP process after filling the titanium alloy complex powder into capsule.

1 . Titanium alloy complex powder comprising:
 titanium alloy powder of which titanium alloy raw material is hydrogenated to obtain hydrogenated titanium alloy powder and the hydrogenated titanium alloy powder is dehydrogenated, and   ceramic powder mixed to the titanium alloy powder.   
     
     
         2 . The titanium alloy complex powder according to  claim 1 , wherein the ceramic powder is at least one kind selected from SiC, TiC, SiO x , TiO x  (here, index x is a real number which is in 1≦x≦2) and Al 2 O 3 . 
     
     
         3 . The titanium alloy complex powder according to  claim 1 , wherein the amount of the ceramic powder added ranges from 0.01 to 0.15 wt % in case that one ceramic powder is added, and the total amount of the ceramic powder added ranges from 0.01 to 0.3 wt % in case that two or more ceramic powders are added. 
     
     
         4 . The titanium alloy complex powder according to  claim 1 , wherein particle size of the titanium alloy powder is not more than 150 μm. 
     
     
         5 . The titanium alloy complex powder according to  claim 1 , wherein the titanium alloy powder contains aluminum and vanadium, or contains at least one kind selected from zirconium, tin, molybdenum, iron and chromium in addition to aluminum and vanadium. 
     
     
         6 . A process for producing titanium alloy complex powder, comprising steps of:
 hydrogenating titanium alloy as a raw material to generate hydrogenated titanium alloy as an intermediate material,   grinding the hydrogenated titanium alloy as an intermediate material to obtain hydrogenated titanium alloy powder, and   dehydrogenating the hydrogenated titanium alloy powder to generate titanium alloy powder before or after adding ceramic powder.   
     
     
         7 . Titanium alloy material comprising:
 the titanium alloy complex powder according to  claim 1  as a starting material, wherein the powder is pressed and formed.   
     
     
         8 . The titanium alloy material according to  claim 7 , wherein the density of the titanium alloy material is not less than 99% to the theoretical one. 
     
     
         9 . The titanium alloy material according to claim  7 , wherein titanium compound is dispersed in the titanium alloy, and the titanium compound is a by-product generated by the reaction of the ceramic powder added and solid solved into the titanium alloy powder. 
     
     
         10 . The titanium alloy material according to  claim 7 , wherein the titanium compound is TiC, TiSi 2  or TiO 2 . 
     
     
         11 . A process for production of titanium alloy material, comprising steps of:
 consolidating the titanium alloy complex powder according to  claim 1  by CIP process and subsequent HIP process, or by HIP process after filling the titanium alloy complex powder into a capsule.