Metal powder

Abstract

A process of using a molybdenum-containing binder alloy powder to produce a sintered hard metal based on a tungsten carbide includes providing a molybdenum-containing binder alloy powder with a FSSS value as determined in accordance with an ASTM B 330 standard of from 0.5 to 3 μm and comprising from 0.1 to 10% by weight of a molybdenum in at least one of an alloyed form and a prealloyed form, less than 60% by weight of an iron, up to 60% by weight of a cobalt, and from 10 to 60% by weight of a nickel. The molybdenum-containing binder alloy powder is incorporated into a hard metal. The hard metal is sintered so as to provide the liquid-phase-sintered hard metal based on a tungsten carbide.

1 - 12 . (canceled) 
     
     
         13 . A process of using a molybdenum-containing binder alloy powder to produce a sintered hard metal based on a tungsten carbide, the process comprising:
 providing a molybdenum-containing binder alloy powder with a FSSS value as determined in accordance with an ASTM B 330 standard of from 0.5 to 3 μm and comprising from 0.1 to 10% by weight of a molybdenum in at least one of an alloyed form and a prealloyed form, less than 60% by weight of an iron, up to 60% by weight of a cobalt, and from 10 to 60% by weight of a nickel;   incorporating the molybdenum-containing binder alloy powder into a hard metal; and   sintering the hard metal so as to provide the liquid-phase-sintered hard metal based on a tungsten carbide.   
     
     
         14 . The process of using as recited in  claim 13 , wherein the molybdenum-containing binder alloy powder contains the molybdenum solely in a metallic form. 
     
     
         15 . The process of using as recited in  claim 13 , wherein the molybdenum-containing binder alloy powder comprises from 20 to 60% by weight of the nickel. 
     
     
         16 . The process of using as recited in  claim 13 , wherein the molybdenum-containing binder alloy powder further comprises not more than 20% by weight of a tungsten. 
     
     
         17 . The process of using as recited in  claim 13 , wherein the molybdenum-containing binder alloy powder further comprises not more than 10% by weight of a tungsten. 
     
     
         18 . The process of using as recited in  claim 13 , wherein at least one of a first part of the molybdenum-containing binder alloy powder is introduced as a pulverulent alloy comprising at least one metal and the molybdenum, and a remaining part of the molybdenum-containing binder alloy powder is introduced as at least one of an element and an alloy not comprising the molybdenum. 
     
     
         19 . The process of using as recited in  claim 13 , wherein the scintering is performed as a liquid-phase sintering. 
     
     
         20 . The process of using as recited in  claim 13 , wherein the molybdenum-containing binder alloy powder further comprises up to 30% by weight of at least one organic additive. 
     
     
         21 . A prealloyed powder comprising from 0.1 to 65% by weight of an iron, from 0.1 to 60% by weight of a cobalt, from 10 to 80% by weight of a nickel, and from 0.1 to 20% by weight of a molybdenum in metallic form, wherein a FSSS value determined in accordance with an ASTM B 330 standard is not more than 3 μm. 
     
     
         22 . The prealloyed powder as recited in  claim 21 , wherein the prealloyed powder further comprises only unavoidable impurities. 
     
     
         23 . The prealloyed powder as recited in  claim 21 , further comprising up to 10% by weight of a tungsten in at least one of an alloyed form and a prealloyed form. 
     
     
         24 . The prealloyed powder as recited in  claim 21 , wherein the prealloyed powder comprises of from 10 to 60% by weight of the nickel.