Composite material , method for manufacturing the same, and edged tool by using the same

Abstract

It is an object to provide a composite material having a satisfactory sintering density and exhibiting excellent abrasion resistance and a method for manufacturing the same. The composite material contains a Ti alloy matrix containing Ti as a primary component and TiB and NiB dispersed in the Ti alloy matrix. The method for manufacturing the composite material includes the step of conducting sintering by using a mixed powder containing a Ti powder and/or a Ti alloy powder containing Ti as a primary component and a Ni—B alloy powder.

1 . A sintered composite material, comprising:
 a titanium alloy matrix comprising titanium as a primary component; and   TiB and NiB phases dispersed in the titanium alloy matrix.   
     
     
         2 . The sintered composite material according to  claim 1 , wherein the content of the NiB in terms of percent by weight is larger than the content of the TiB in terms of percent by weight. 
     
     
         3 . The sintered composite material according to  claim 1 , further comprising TiNi phases. 
     
     
         4 . The sintered composite material according to  claim 1 , wherein the content of the NiB is 0.3 to 2.4 percent by weight of the composite material. 
     
     
         5 . The sintered composite material according to  claim 1 , further comprising aluminum and vanadium, wherein the content of the aluminum is 0.1 to 6 percent by weight of the composite material and the content of the vanadium is 0.1 to 4 percent by weight of the composite material. 
     
     
         6 . The sintered composite material according to  claim 1 , further comprising silver, wherein the content of the silver is 0.1 to 5 percent by weight of the composite material. 
     
     
         7 . The sintered composite material according to  claim 1 , further comprising chlorine, wherein the content of the chlorine is 0.03 percent by weight of the composite material or less. 
     
     
         8 . The sintered composite material according to  claim 1 , further comprising molybdenum, wherein the content of the molybdenum is 0.03 percent by weight of the composite material or less. 
     
     
         9 . An edged tool, comprising:
 an edge portion comprising a sintered composite material, wherein the sintered composite material comprises a titanium alloy matrix, TiB and NiB,   
       wherein the titanium alloy matrix comprises titanium as a primary component, and wherein TiB and NiB phases are dispersed in the titanium alloy matrix. 
     
     
         10 .- 15 . (canceled) 
     
     
         16 . A powdered sintering composition comprising:
 a mixed powder comprising a NiB powder and at least one of a titanium and a titanium alloy powder, wherein the titanium alloy powder comprises titanium as a primary component.   
     
     
         17 . (canceled) 
     
     
         18 . The powdered sintering composition according to  claim 16 , wherein the content of NiB is 0.6 to 4.8 percent by weight of the powdered sintering composition. 
     
     
         19 . The sintered composite material according to  claim 3 , wherein a TiNi phase and a TiB phase are connected via a NiB phase. 
     
     
         20 . The edged tool according to  claim 9 , wherein the content of the NiB in terms of percent by weight is larger than the content of the TiB in terms of percent by weight. 
     
     
         21 . The edged tool according to  claim 9 , wherein the composite material further comprises TiNi phases. 
     
     
         22 . The edged tool according to  claim 21 , wherein a TiNi phase and a TiB phase are connected via a NiB phase. 
     
     
         23 . The edged tool according to  claim 9 , wherein the content of the NiB is 0.3 to 2.4 percent by weight of the composite material. 
     
     
         24 . The edged tool according to  claim 9 , wherein the composite material further comprises aluminum and vanadium, wherein the content of the aluminum is 0.1 to 6 percent by weight of the composite material and the content of the vanadium is 0.1 to 4 percent by weight of the sintered composite material. 
     
     
         25 . The edged tool according to  claim 9 , wherein the composite material further comprises silver, wherein the content of the silver is 0.1 to 5 percent by weight of the sintered composite material. 
     
     
         26 . The edged tool according to  claim 9 , wherein the composite material further comprises chlorine, wherein the content of the chlorine is 0.03 percent by weight of the sintered composite material or less. 
     
     
         27 . The edged tool according to  claim 9 , further comprising molybdenum, wherein the content of the molybdenum is 0.03 percent by weight of the sintered composite material or less.