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首先采用高频感应熔炼法制备不同Fe含量的CuFe母合金,在对其组织与性能研究基础上采用单辊快速凝固甩带法制备了合金CuFe合金薄带,对不同成分的CuFe合金薄带相结构、组织进行分析表征。结果表明,Fe含量在2%~10%(质量分数)的范围内,随着Fe含量增加,合金的微观组织中富Fe枝晶数量增多且发生粗化。CuFe母合金的电导率随Fe含量增加逐渐降低,而硬度随之增大。Fe含量为8%的CuFe合金组织中Cu基体的显微硬度较高。CuFe合金薄带组织中晶粒非常细小,从辊面到自由面由于凝固速度的差异,合金薄带组织中晶粒逐渐变粗。对CuFe合金薄带进行XRD分析,未发现Fe的衍射峰,仅有Cu的衍射峰;同时发现随着Fe含量的增加,Cu的衍射峰逐渐降低并且变宽,并向低角度偏移,同时Cu(220)点阵常数增大,结合Cu-6.0%Fe的SEM分析,表明Fe固溶入Cu中,形成了CuFe固溶体。
Firstly, high-frequency induction melting method was used to prepare CuFe alloy with different Fe content. Based on the study of its structure and properties, a single-roll rapid solidification rejection method was used to prepare the alloy CuFe alloy ribbon. The CuFe alloy ribbons with different compositions Structure, organization analysis and characterization. The results show that the Fe content is in the range of 2% -10% (mass fraction). With the increase of Fe content, the amount of Fe-rich dendrite in the microstructure increases and the coarsening occurs. With the increase of Fe content, the electrical conductivity of CuFe master alloy gradually decreases, while the hardness increases. The microhardness of Cu matrix in CuFe alloy with 8% Fe content is higher. The grains in the CuFe alloy ribbons are very small. The grain size of the alloy ribbon becomes coarse due to the difference in solidification rate from the roll surface to the free surface. XRD analysis of the CuFe alloy ribbon showed no diffraction peak of Fe and only the diffraction peak of Cu. It was also found that the diffraction peak of Cu gradually decreased and widened and shifted to a low angle with the increase of Fe content. Meanwhile, The lattice constant of Cu (220) increases with SEM analysis of Cu-6.0% Fe, indicating that Fe is dissolved into Cu to form CuFe solid solution.