Production method of metal product, metal product, connection method of metal component and connection structure

Abstract

A deposition is gradually formed by molding a product main body, removing a defect periphery including a defect generated on a surface to be treated of the product main body by molding so that a recess portion is formed on the surface to be treated of the product main body, employing a molded electrode composed of a molded body molded from a powder of a metal or the molded body processed with a heat treatment, and generating a pulsing electric discharge between the recess portion periphery including the recess portion and the molded electrode in an electrically insulating liquid or gas so that a material of the molded electrode or a reaction substance of the material carries out deposition and such at the recess portion periphery by energy of the electric discharge.

1 . A method for joining metal components, comprising:
 butting the metal components respectively having beveled ends to define a recess portion between the beveled ends; and   depositing a deposition from a deposition tool electrode to fill the recess portion by processing the metal components as a workpiece of an electric spark machine opposed to the deposition tool electrode.   
   
   
       2 . The method of  claim 1 , wherein the deposition electrode is formed by compressing a powder consisting essentially of the metal. 
   
   
       3 . A metal product joined by the method of  claim 1 . 
   
   
       4 . A joint structure comprising:
 a pair of components of a metal respectively including beveling ends, the beveling ends being butted with each other to form a recess portion defined by the beveling ends; and   a deposition deposited from a deposition tool electrode by processing the components as a workpiece of an electric spark machine opposed to the deposition tool electrode to fill the recess portion.   
   
   
       5 . The joint structure of  claim 4 , wherein the deposition electrode is formed by compressing a powder consisting essentially of the metal. 
   
   
       6 . The joint structure of  claim 4 , wherein the deposition is processed with a heat treatment.