| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric contact material manufacturing method and an electric contact material capable of enlarging a rugged shape on the surface of a metal plating. SOLUTION: In applying electric plating on a parent material 2, overcurrent is made to flow at an initial stage of the electric plating, and afterwards, normal current is made to flow to form a silver plating on the parent material 2. For this treatment, first, an amount of the parent material 2 necessary for plating is rolled for leading it into a first plating tub 3a as a tub in which overcurrent is circulated. As the parent material 2 is set in the first plating tub 3a, overcurrent is made to flow between the parent material 2 dipped in plating liquid 4 and electrodes to form silver plating on the parent material 2 dipped in the plating liquid 4. Further, a part where the silver plating is formed in the first plating tub 3a is set in a second plating tub 3b, a normal-value current is made to flow between the parent material and the electrodes, and a silver component is piled on the above silver plating to form a silver plating with a necessary thickness. COPYRIGHT: (C)2007,JPO&INPIT
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