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研究了Cu-10Fe-0.15Zr、Cu-10Fe-2Ag-0.15Zr合金微观组织及性能。测定了在不同条件下试验合金的强度和电导率;并利用扫描电镜对材料的微观组织结构进行了观察和分析。结果表明:Cu-10Fe-0.15Zr、Cu-10Fe-2Ag-0.15Zr原位复合材料经(450~500)℃×1 h的最终退火处理,可获得较好的导电性和强度。热稳定性测试表明进行固溶处理后的形变Cu-10Fe-0.15Zr、Cu-10Fe-2Ag-0.15Zr原位复合材料抗软化温度能提高到450~500℃左右。当退火温度低于500℃时,导电率随着温度的升高而升高,而当温度高于这个温度,导电率逐渐下降。Cu-10Fe-2Ag-0.15Zr形变原位复合材料中间退火温度在450℃左右时,可获得最佳的综合性能,抗拉强度1056 MPa、导电率75%IACS、抗软化温度高于450℃。Cu-10Fe-2Ag-0.15Zr合金中添加微量合金元素Ag可使材料的极限抗拉强度增大,并改善材料的热稳定性,但导电率略有提高。
The microstructure and properties of Cu-10Fe-0.15Zr and Cu-10Fe-2Ag-0.15Zr alloys were studied. The strength and electrical conductivity of the alloy under different conditions were measured. The microstructure of the alloy was observed and analyzed by scanning electron microscopy. The results show that the Cu-10Fe-0.15Zr and Cu-10Fe-2Ag-0.15Zr in-situ composites can achieve better electrical conductivity and strength by final annealing at (450 ~ 500) ℃ for 1 h. The thermal stability tests show that the softening temperature of Cu-10Fe-0.15Zr and Cu-10Fe-2Ag-0.15Zr in-situ composites after solution treatment can be increased to 450 ~ 500 ℃. When the annealing temperature is lower than 500 ° C, the conductivity increases with increasing temperature, and when the temperature is higher than this temperature, the conductivity gradually decreases. The best comprehensive properties, tensile strength of 1056 MPa, electrical conductivity of 75% IACS and softening temperature above 450 ℃ are obtained when the intermediate annealing temperature of Cu-10Fe-2Ag-0.15Zr in-situ composites is about 450 ℃. Addition of trace alloying element Ag into Cu-10Fe-2Ag-0.15Zr alloy can increase the ultimate tensile strength of the material and improve the thermal stability of the material, but the conductivity increases slightly.