| 摘要 |
The present invention provides a high-strength high-heat-resistance copper alloy which has the following advantages: high tensile strength which is above 750MPa, high strength which is above Hv220, high heat resistance, and excellent jointing performance with an oxide film. The high-strength high-heat-resistance copper alloy comprises the following components in total weight: 0.4-1.0% of Ni;0.03-0.3% of Fe and/or Co (called M below); 0.05-0.2% of P; 0.1-3% of Sn; 0.05-2.5% of Zn; and 0.0005-0.05% of Cr; wherein a ratio (Ni+M)/P is 4-12; Ni/M is 3-12; the number of fine phosphide precipitationparticles with grain diameters in 1-20 nm is above 300/mu m<2>; the number of coarse crystal precipitation particles with grain diameters which exceed 100 nm is less than 0.5/mu m<2>; and Sn/(Ni+M+P+Sn) is above 0.01. |
