Formable sintered alloy with dispersed hard phase

Abstract

An iron-base alloy of the present invention comprises a 20 to 50% weight fraction of prealloy steel of composition A and a 48 to 78% weight fraction of prealloy steel of composition B to which additional alloying to which additional alloying elements (and lubricant) are added in preparation of a powdered metal blended mixture. The resulting mixture composition of the embodiment comprises in % by mass: 0.4 to 1.0% of C; 0.5 to 3.5% of Cr; 0.1 to 1.7% of Mo; to 3.0% of Cu; and the balance being primarily Fe and unavoidable impurities. Ni and/or Mn may also be included in the resulting mixture composition.

1 . An iron based sintered body having a composition comprising in % by mass:
 0.4 to 1.0% of C;   0.5 to 3.5% of Cr;   0.1 to 1.7% of Mo;   0.3 to 3.0% of Cu; and   the balance being primarily Fe and inevitable impurities.   
     
     
         2 . The composition of  claim 1  further comprising in % by mass: 0.1 to 6.0 of Ni. 
     
     
         3 . The composition of  claim 1  further comprising in % by mass: 0.1 to 0.5 of Mn. 
     
     
         4 . A gear formed from the iron-based alloy comprising in % by mass: 0.4 to 1.0% of C; 0.5 to 3.5% of Cr; 0.1 to 1.7% of Mo; 0.3 to 3.0% of Cu; and the balance being primarily Fe and inevitable impurities. 
     
     
         5 . An iron based sintered body having a composition comprising in % by mass:
 0.4 to 1.0% of C;   0.5 to 3.5% of Cr;   0.1 to 1.7% of Mo;   0.3 to 3.0% of Cu;   0.1 to 6.0% of Ni;   0.1 to 0.5% of Mn; and   
       the balance being primarily Fe and inevitable impurities.