In the last years, a special interest has emerged towards the total or partial substitution of traditional cemented carbides composing elements. In this study, a systematic methodology is presented and used to design iron-based binders for WC and Ti(C,N) ceramic phases. First, metal alloy phase diagrams were simulated by means of Thermo-Calc® software, combining several alloying elements (Ni, Al, Cr, Mo and C) to fulfil the following criteria: provide high corrosion resistance, least number of phases present at room temperature and solidus-liquidus temperatures below 1500 °C. Two final compositions were chosen: Fe15Ni10Cr and Fe15Cr10Al. Next step was to validate the critical temperatures by means of differential thermal analysis tests and, finally, high-temperature wetting experiments were conducted to measure the contact angle between molten metal and ceramic phases. Resultant metal-ceramic region was studied by means of field emission scanning electron microscopy, energy dispersive X-ray spectroscopy and nanoindentation techniques. As a proof of concept, samples with 80 vol% of Ti(C,N) and WC ceramic phases were prepared for a basic characterization. Both ceramic reinforcements were compared, and the presented methodology could satisfactorily be validated as a design procedure of alternative binders for hard materials.

在过去的几年中，人们对全部或部分替代传统的硬质合金组成元素表现出了特别的兴趣。在这项研究中，提出了一种系统的方法论，并用于设计用于WC和Ti（C，N）陶瓷相的铁基粘合剂。首先，通过Thermo-Calc®软件模拟金属合金相图，结合几种合金元素（Ni，Al，Cr，Mo和C）来满足以下条件：提供高耐腐蚀性，室温下存在的相最少温度和固相线温度低于1500°C。选择了两种最终成分：Fe15Ni10Cr和Fe15Cr10Al。下一步是通过差热分析测试验证临界温度，最后，进行了高温润湿实验，以测量熔融金属与陶瓷相之间的接触角。通过场发射扫描电子显微镜，能量色散X射线光谱和纳米压痕技术研究了所得的金属陶瓷区域。作为概念证明，准备了具有80％（体积）的Ti（C，N）和WC陶瓷相的样品进行基本表征。比较了两种陶瓷增强材料，所提出的方法可以令人满意地被验证为替代硬质材料粘合剂的设计程序。N）和WC陶瓷相已准备用于基本表征。比较了两种陶瓷增强材料，所提出的方法可以令人满意地被验证为替代硬质材料粘合剂的设计程序。N）和WC陶瓷相已准备用于基本表征。比较了两种陶瓷增强材料，所提出的方法可以令人满意地被验证为替代硬质材料粘合剂的设计程序。