Fitzpatrick, Cella, Harper & Scinto
Method and apparatus for manufacturing metal material and metal material
The present invention provides a method for manufacturing a metal material. The method comprises a temperature increasing step of increasing the temperature of a silver material having undergone final plastic working to 700° C. or more and less than a melting point of the silver material in a vacuum or a helium gas atmosphere, a heating step of maintaining the silver material at 700° C. or more and less than the melting point, and a cooling step of cooling the silver material to room temperature in a vacuum or a helium gas atmosphere. For a part of the period of the heating step, the silver material is heated in a mixed atmosphere in which hydrogen gas is mixed with helium gas.
CANON DENSHI KABUSHIKI KAISHA
H C H C C H C C C C C H C
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Hiroshi
Yamashita