Method of manufacturing heat-resistant component using metal granules

Abstract

Disclosed is a method of manufacturing a heat-resistant component using granules. More particularly, the method of manufacturing a heat-resistant component includes a step of preparing granules by spraying a mixture including a metal powder and a slurry material into a housing equipped with a disc and rotating the disc; a step of preparing a molded object by compression-molding the granules; a step of preparing a sintered object by sintering the molded object at about 1,000° C. to about 1,600° C.; and a step of adjusting dimensions by cutting the sintered object, wherein the housing is sealed and hot air at about 70° C. to about 200° C. is supplied into the housing.

What is claimed is: 
     
         1 . A method of manufacturing a heat-resistant component, the method comprising:
 preparing granules by spraying a mixture comprising a metal powder and a slurry material into a housing equipped with a disc and rotating the disc;   preparing a molded object by compression-molding the granules;   preparing a sintered object by sintering the molded object at about 1,000° C. to about 1,600° C.; and   adjusting dimensions by cutting the sintered object,   wherein the housing is sealed and hot air at about 70° C. to about 200° C. is supplied into the housing.   
     
     
         2 . The method according to  claim 1 , wherein the metal powder comprises about 0.1 to 3% by weight of carbon, greater than 0 and less than or equal to about 5% by weight of silicon, greater than 0 and less than or equal to about 15% by weight of manganese, greater than 0 and less than or equal to about 1% by weight of phosphorus, greater than 0 and less than or equal to about 1% by weight of sulfur, greater than 0 and less than or equal to about 90% by weight of nickel, greater than 0 and less than or equal to about 50% by weight of iron, and greater than 0 and less than or equal to about 50% by weight of chromium. 
     
     
         3 . The method according to  claim 1 , wherein an average size of the granules is about 20 μm to about 200 μm. 
     
     
         4 . The method according to  claim 1 , wherein an average particle size of the metal powder is about 0.01 μm to about 50 μm, and a particle size distribution of the metal powder is about 0.001 μm to about 100 μm. 
     
     
         5 . The method according to  claim 1 , wherein solid loading (S/L) of the mixture is about 10% by volume to about 45% by volume. 
     
     
         6 . The method according to  claim 1 , wherein a rotational speed of the disc is about 4,000 rpm to about 20,000 rpm. 
     
     
         7 . The method according to  claim 1 , wherein the slurry material comprises a solvent and a binder. 
     
     
         8 . The method according to  claim 7 , wherein the solvent comprises one or more of water, hexane, acetone, and alcohol having a carbon number of 1 to 10. 
     
     
         9 . The method according to  claim 7 , wherein the binder comprises one or more of polyvinyl butyral, polyvinyl alcohol, wax, and polyethylene glycol. 
     
     
         10 . The method according to  claim 1 , wherein the compression molding is performed under a pressure of about 0.1 ton/cm 2  to about 10 ton/cm 2 .