Method For Surface-Treating Mirror-Finish Stainless Steel Workpiece

Abstract

The present invention discloses a method for surface-treating a mirror-finish stainless steel workpiece, which comprises steps: dividing the surface of a mirror-finish stainless steel workpiece into different grinding areas according to the depths of the scratches; selecting sand papers respectively having appropriate grit sizes for the grinding areas, and grinding the grinding areas to remove all the scratches; sequentially using three combinations of polishing agents and grinding materials to undertake polishing; and using an abrasive paste and a fourth grinding material to perform mirror-finishing.

1 . A method for surface-treating a mirror-finish stainless steel workpiece, comprising steps:
 (1) dividing a surface of a mirror-finish stainless steel workpiece into different grinding areas according to depths of scratches;   (2) selecting a first sand paper having an appropriate grit size for one of said grinding areas, and using a grinder and said first sand paper to grind said grinding area;   (3) examining whether all scratches on said grinding area have been eliminated; undertaking Step (5) if the answer is yes; undertaking Step (4) if the answer is no;   (4) selecting a second sand paper having a greater grit size, and using a grinder and said second sand paper to grind said grinding area again, and then undertaking Step (3);   (5) examining whether scratches of all said grinding areas have been eliminated; undertaking Step (6) if the answer is yes; undertaking Step (2) if the answer is no;   (6) applying a first polishing agent to all said grinding areas;   (7) using a grinder and a first grinding material to eliminate sand abrasions from all said grinding areas;   (8) applying a second polishing agent to all said grinding areas;   (9) using a grinder and a second grinding material to eliminate marks scribed by said first grinding material from all said grinding areas;   (10) applying a third polishing agent to all said grinding areas;   (11) using a grinder and a third grinding material to perform a final grinding on all said grinding areas;   (12) applying an abrasive paste to all said grinding areas, and letting said abrasive paste stay still on all said grinding areas for a given period of time; and   (13) using a fourth grinding material to perform mirror-finishing on all said grinding areas.   
     
     
         2 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said first polishing agent used in said step (6) is a BRIGHT-CUT grade polishing agent that can fast cut various metals and generates medium brightness. 
     
     
         3 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said first grinding material used in said step (7) is a sisal buff. 
     
     
         4 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said second polishing agent used in said step (8) is a FASTCUT grade polishing agent that has high grinding efficiency, can fast remove scratches on a surface of a metal, and generates lower brightness. 
     
     
         5 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said second grinding material used in said step (9) is a cotton buff. 
     
     
         6 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said third polishing agent used in said step (10) is a WHITE CUTTER P2 grade polishing agent that can fast cut various metals, contains less wax, and generates a very clean surface having medium brightness. 
     
     
         7 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said third grinding material used in said step (11) is a wool buff. 
     
     
         8 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said abrasive paste used in said step (12) contains at least diluted nitric acid, alumina powder, xanthan gum, water, bentonite, and essence. 
     
     
         9 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said given period of time in said step (12) is 30-60 minutes. 
     
     
         10 . The method for surface-treating a mirror-finish stainless steel workpiece according to  claim 1 , wherein said fourth grinding material used in said step (13) is a high-density and tough sponge.