| 摘要 |
PURPOSE:To manufacture an electric contact material having consumption resistance, low contact resistance, and deposition resistance, by subjecting a mixture of specific percentages of copper powder, metal nitrides, and graphite powder to mechanical alloying and then to compacting and by applying sintering and recompacting to the resulting green compact. CONSTITUTION:The copper powder (97-50wt%), 50-3% nitrides of the group IVa, Va, and VIa metals of the periodic table, and 10-0.1% graphite powder are mixed to undergo mechanical alloying. The resulting powder is compacted. This green compact is sintered in a reduced atmosphere or in vacuum, and the resulting sintered compact is recompacted. In this way, an alloy in which size of carbon is regulated to <=3mu and also respective above-mentioned carbon grins are dispersed uniformly and independently can be obtained. The above alloy can be used for electric contact material having consumption resistance, low contact resistance, deposition resistance, and arc extinction and excellent in practical utility. |
