Molded steel alloy, corresponding part, and manufacturing method

Abstract

This molded steel alloy includes the following elements in weight percent: carbon (C) between 0.08% and 0.4%, silicon (Si) between 0.15% and 2%, nickel (Ni) between 24% and 31%, cobalt (Co) between 15% and 30%, and niobium (Nb) between 0.01% and 2.5%. The composition also includes an additional element selected from a group consisting of: molybdenum (Mo) at a content of less than or equal to 3% by weight, manganese (Mn) at a content of less than or equal to 1.5% by weight, chromium (Cr) at a content of less than or equal to 1.5% by weight, phosphorus (P) at a content of less than or equal to 0.04% by weight, sulfur (S) at a content of less than or equal to 0.03% by weight, copper (Cu) at a content of less than or equal to 0.5% by weight, iron, and unavoidable impurities.

1 . A steel alloy composition, comprising in weight percent:
 carbon (C) between 0.08% and 0.4%,   silicon (Si) between 0.15% and 2%,   nickel (Ni) between 24% and 31%,   cobalt (Co) between 15% and 30%,   niobium (Nb) between 0.01% and 2.5%, and   an additional element selected from a group consisting of:
 molybdenum (Mo) at a content of less than or equal to 3% by weight, 
 manganese (Mn) at a content of less than or equal to 1.5% by weight. 
 chromium (Cr) at a content of less than or equal to 1.5% by weight, 
 phosphorus (P) at a content of less than or equal to 0.04% by weight, 
 sulfur (S) at a content of less than or equal to 0.03% by weight, 
 copper (Cu) at a content of less than or equal to 0.5% by weight, 
 iron, and 
 impurities. 
   
     
     
         2 . The steel alloy according to  claim 1 , wherein the nickel (Ni) content is minimum 25% or minimum 26% and maximum 30% or maximum 30.5% by weight. 
     
     
         3 . The steel alloy according to  claim 1 , wherein the cobalt (Co) content is minimum 16% and maximum 19% or maximum 27% by weight. 
     
     
         4 . The steel alloy according to  claim 1 , wherein the niobium content (Nb) is minimum 0.05% and maximum 1.5% or maximum 2% by weight. 
     
     
         5 . The steel alloy according to  claim 1 , wherein the carbon content (C) is minimum 0.1% or minimum 0.12% by weight and maximum 0.2% or maximum 0.3% by weight. 
     
     
         6 . The steel alloy according to  claim 1 , wherein the silicon content (Si) is minimum 0.2% and maximum 1% or maximum 1.5% by weight. 
     
     
         7 . The steel alloy according to  claim 1 , wherein the molybdenum content (Mo) is minimum 0.05% or minimum 0.5% and maximum 1.2% or maximum 1.5% by weight. 
     
     
         8 . The steel alloy according to  claim 1 , wherein the manganese content (Mn) is minimum 0.05% or minimum 0.1% and maximum 1% by weight. 
     
     
         9 . The steel alloy according to  claim 1 , wherein the content of copper (Cu) is less than or equal to 0.4% by weight, preferably less than or equal to 0.3% by weight. 
     
     
         10 . The steel alloy according to  claim 1 , wherein the chromium (Cr) content is less than or equal to 1%, preferably less than or equal to 0.4%, preferably less than or equal to 0.3% by weight. 
     
     
         11 . A part, comprising:
 a steel alloy being comprised of a composition according to  claim 1 .   
     
     
         12 . A method for manufacturing a part, the method comprising the following steps:
 preparing an alloy in a foundry, having a composition according to  claim 1 ;   pouring said alloy into a mold in order to obtain a part.