Hard metal or cermet cutting material and the use thereof

Abstract

The invention relates to a hard metal or cermet cutting material for cutting chromium-alloy steel parts. Said cutting material comprises a hard phase containing carbides, nitrides and/or carbonitrides and a binder phase based on iron, cobalt and nickel. The aim of the invention is to prevent an agglomeration of the cutting material during cutting operations. For this purpose, the binder phase contains 10% by weight to 75% by weight of Co, 10% by weight to 75% by weight of Ni, 5% by weight to 30% by weight of Cr, ≧20% by weight to 60% by weight of Fe, the total of Co, Ni, Cr and Fe not exceeding 100% by weight.

1 . A hard metal or cermet cutting material for the machining of chromium-alloyed steel workpieces, with a carbide, nitride and/or carbonitride containing hard material phase and a binder phase of iron, cobalt and nickel, 
 characterized in that,    the binder phase contains 10 mass % to 75 mass % Co, 10 mass % to 75 mass % Ni, 5 mass % to 30 mass % Cr, >20 mass % to 60 mass % Fe, whereby the sum of the Co, Ni, Cr and Fe does not exceed 100 mass %.    
     
     
         2 . The hard metal or cermet cutting material according to  claim 1 , characterized in that, the binder phase additionally contains respectively each up to 5 mass % V, Mo and/or Al, up to the maximum solubility limit of Ti, W, Ta/Nb and/or up to 15 mass % Mn.  
     
     
         3 . The hard metal or cermet cutting material according to  claim 1 , characterized in that, the binder contains O, N and/or B up to the maximum solubility limits thereof.  
     
     
         4 . The hard metal or cermet cutting material according to  claim 1 , characterized in that, the C content in the cutting material is so adjusted that no q-phase and C-porosity is present.  
     
     
         5 . The hard metal or cermet cutting material according to  claim 1 , characterized in that, the binder phase does not contain any hexagonal component.  
     
     
         6 . The use of the hard metal or cermet cutting material according to  claim 1  for the chip removal machining of steel workpieces, preferably of workpieces of chromium-containing alloys.  
     
     
         7 . The use of a cutting material according  claim 1  for the chip removal machining of chromium-containing metal workpieces, characterized in that, the chromium content in the binder phase of the cutting tool material is not within the chromium proportion in the steel alloy of the workpiece.