Shot ball having excellent strength and wear resistance and method for manufacturing same

Abstract

Disclosed is a shot ball having excellent strength and wear resistance. The shot ball according to an embodiment of the present disclosure includes, by weight %, 0.09% to 1.3% of carbon (C), 3% to 29% of manganese (Mn), 1.0% to 8.0% of chrome (Cr), 0.05% or less of phosphorus (P), 0.05% or less of sulfur (S), 10% or less (excluding 0) of nickel (Ni), 7% or less (excluding 0) of molybdenum (Mo), 10% or less (excluding 0) of tungsten (W), the remainder iron (Fe), and other unavoidable impurities.

1 . A shot ball having excellent strength and wear resistance, comprising: by weight %, 0.09% to 1.3% of carbon (C), 3% to 29% of manganese (Mn), 1.0% to 8.0% of chromium (Cr), 0.05% or less of phosphorus (P), 0.05% or less of sulfur (S), 10% or less (excluding 0) of nickel (Ni), 7% or less (excluding 0) of Molybdenum (Mo), 10% or less (excluding 0) of tungsten (W), the remainder iron (Fe), and other unavoidable impurities. 
     
     
         2 . The shot ball according to  1 , wherein the shot ball has a diameter within a range of 0.1 mm to 5.0 mm. 
     
     
         3 . A Method for manufacturing a shot ball having excellent strength and wear resistance, comprising quenching a molten metal including, by weight %, 0.09% to 1.3% of carbon (C), 3% to 29% of manganese (Mn), 1.0% to 8.0% of chromium (Cr), 0.05% or less of phosphorus (P), 0.05% or less of sulfur (S), 10% or less (excluding 0) of nickel (Ni), 7% or less (excluding 0) of Molybdenum (Mo), 10% or less (excluding 0) of tungsten (W), the remainder iron (Fe) and other unavoidable impurities through an atomizing method. 
     
     
         4 . The method according to  3 , wherein the atomizing method comprises at least one of water atomizing and gas atomizing. 
     
     
         5 . The method according to  3 , wherein a cooling rate is set to 30° C./sec or more when the atomizing method is performed.