Abstract

The methods of pressing, rolling, and sintering in hydrogen at 800°C have been applied to production of powdered materials based on copper of the Cu–Fe–Al system. The influence of single components and their blends on compaction, structure, and main functional properties of composite materials—electrical conductivity, hardness, and strength (yield stress)—has been analyzed as a function of process variables: compacting pressure of 200–700 MPa, deformation by rolling of 40–85%, dispersity of iron powders having particle sizes <50 and 63–100 μm, contents of iron powder of 5–10 wt % and Fe₂Al₅ intermetallic powder of 2.5–5 wt %. The best combination of physicomechanical properties has been found for composite material with the composition (wt %) 92.5 Cu + 2.5 Fe₂Al₅ + 5 Fe, together with iron particle sizes of 63–100 μm. It has been demonstrated that dispersion strengthening of copper by Fe₂Al₅ particles and filling of its structure with iron fibers formed by rolling provides high relative density of 98–99% and subsequent strength properties of the composite material: hardness HB of 980 MPa, yield stress of 150 MPa at electrical conductivity of 71% of copper conductivity.

中文翻译：

---

具有改善的机械性能的基于铜粉的导电材料

摘要

在800°C的氢气中进行压制，轧制和烧结的方法已用于生产基于Cu–Fe–Al体系的铜的粉末状材料。根据工艺变量分析了单一成分及其混合物对复合材料的压实，结构和主要功能特性（电导率，硬度和强度（屈服应力））的影响，该变量是过程变量的函数：200-700 MPa的压实压力，轧制变形40-85％，粒径<50和63-100μm的铁粉的分散性，铁粉的含量为5-10％（重量）和Fe ₂ Al ₅金属间化合物的含量为2.5-5％（重量）。对于成分（重量％）92.5 Cu + 2.5 Fe _2的复合材料，已经找到了物理机械性能的最佳组合Al ₅ + 5 Fe，铁的粒度为63-100μm。已经证明，Fe ₂ Al ₅颗粒对铜的弥散强化和通过轧制形成的铁纤维填充其结构可提供98-99％的高相对密度以及复合材料的后续强度特性：硬度HB 980 MPa，电导率为铜电导率的71％时，屈服应力为150 MPa。