Impurity Containing Material Fabrication Process for Recycle

为了具有优越的功能，人们开发了成分复杂的新材料，而不可分离的材料通常被填埋处理。零排放是实现更可持续的工业社会系统的主题。工业原料回收利用中的问题亟待解决。我们期待着该工艺的实际应用，以利用难以分离的杂质。在本研究中，开发了新的工艺来积极利用含铜或铝的废铁。例如，在铝的情况下，铁杂质在凝固过程中形成粗大的柱状金属间化合物，这阻碍了回收过程。为了控制材料微观组织的形态，设计了一种在凝固过程中对材料施加超声波振动的实验。在铝硅合金中加入质量分数为4%的Fe(下文中去掉的质量%)进行熔炼，研究了一种回收含大量铜的废铁的最佳回收方法，即快速凝固Fe-Cu粉，然后进行强力强制固结。得到的压坯的机械性能优于不含铜的钢材，从而有可能生产出机械强度高的材料。为有效利用废铁，研制了含铝铸铁。考察了铝对铸态铸铁的影响，提出了生产耐磨性能优良的铸铁的可能性。在Al-6Si-4Fe和Al-12Si-4Fe合金中，超声振动虽然形成了粗大的柱状金属间化合物，但获得了一定的细晶组织。Al-18Si-4Fe合金有可能从粗大的柱状组织转变为细晶组织。

New materials are developed with complex compositions to possess the superior functions, and the inseparable materials are usually disposed by landfill. Zero-Emission is the perused theme during the realization of a more sustainable industrial-society system. It is necessary to solve the problems in recycling the industrial materials. We expect a practical application of the process to utilize the impurities which are difficult to separate. In the present research, new processes were developed to actively utilize the iron scraps which contain copper or aluminum. In the case of aluminum, for example, iron impurities form coarse columnar intermetallic compounds during solidification, which hamper the recycling process. To control the morphology of the material microstructure, an experiment was designed to apply ultrasonic vibration to the material during solidification. Four mass% Fe (hereinafter eliminated mass%) was added to an Al-Si alloy and melted.An excellent recycling method that uses rapid solidification of Fe-Cu powder followed by heavy forced consolidation was investigated for recycling iron scrap containing large amounts of copper. The mechanical properties of the resulting compacts are better than those of steel material without copper, and it will be possible to produce materials with high mechanical strength. Cast iron containing aluminum was manufactured for effective utilization of the iron scrap. The effect of aluminum on the resulting cast iron was examined, and the possibility of which cast iron with excellent abrasion properties can be manufactured was found. In Al-6Si-4Fe and Al-12Si-4Fe alloys, coarse columnar intermetallic compounds were formed, but some fine grain structure was achieved with application of ultrasonic vibration. For Al-18Si-4Fe alloys, it was possible to modify the structure from a coarse columnar structure into a fine grain structure.