发明名称 |
ELECTRICAL CONTACT FOR USE IN A CIRCUIT BREAKER AND A METHOD OF MANUFACTURING THEREOF |
摘要 |
An electrical contact for use in an electrical switching device is provided having low contact resistance, high wear resistance and high anti-weld characteristics. The contact includes a material composition of between 0.2 and 8 % by weight Gr, between 10 and 90 % by weight W and the remaining mixture consisting of Ag. The contact is manufactured using a process which yields a unique microstructure characterized by not having an interconnected Gr network around the Ag thereby providing a strong Ag to Ag bond. This process includes the steps of adding the appropriate amounts of Ag, W and Gr powder material together, blending together under low shear conditions to provide a homogeneous powder mixture while prohibiting the Gr from smearing onto the Ag, pressing the material mixture to form a contact, and then sintering and coining the contact.
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申请公布号 |
CA2222057(A1) |
申请公布日期 |
1997.10.09 |
申请号 |
CA19972222057 |
申请日期 |
1997.03.27 |
申请人 |
SQUARE D COMPANY |
发明人 |
SIEBELS, RANDY L.;WEHR, EUGENE W.;BODIN, JAMES P.;OSWOOD, JON W. |
分类号 |
H01H1/023;H01H1/025;H01H1/027;(IPC1-7):H01H1/02;H01H11/04 |
主分类号 |
H01H1/023 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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