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首页> 外文期刊>Journal of Materials Engineering and Performance >Phase Evolution in Boride-Based Cermets and Reaction Bonding onto Plain Low Carbon Steel Substrate
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Phase Evolution in Boride-Based Cermets and Reaction Bonding onto Plain Low Carbon Steel Substrate

机译：硼化物基金属陶瓷的相演变和在普通低碳钢基底上的反应键合

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摘要

Reaction sinter bonding is a process that aims to bond two materials for improvement in properties through reactive sintering technique. The process has been effectively used to sinter hard materials like borides in situ which not only possess excellent oxidation resistance, good corrosion resistance but also resistant to abrasive wear. Sinter bonding is a unique surface modification process achieved through powder metallurgy and is competent with other techniques like boronizing sintering and sinter-brazing since it eliminates the additional operations of heat treatment and assembly and removes the inherent setbacks with these processes. This study focuses on identifying the phase evolution mechanism using characterization tools like x-ray diffractometry and energy dispersive spectroscopy and study of sinter bonding of the boron containing precursors (Mo-Cr-Fe-Ni-FeB-MoB) onto plain carbon steel. A microstructure containing Fe-based matrix dispersed with complex borides develops with temperature in the tape cast sheets. A fivefold increase in hardness between plain carbon steel in wrought condition and sinter bonded steel was observed. The multilayer consisted of a reaction zone adjacent to the interface and was investigated with the composition profile and hardness measurements. A model of sinter bonding between the cermet and the steel has also been proposed.
机译：反应烧结粘结是旨在通过反应烧结技术粘结两种材料以提高性能的工艺。该方法已被有效地用于原位烧结诸如硼化物之类的硬质材料，该材料不仅具有出色的抗氧化性，良好的耐腐蚀性，而且还具有耐磨性。烧结粘结是一种通过粉末冶金实现的独特的表面改性工艺，并且与诸如硼化烧结和烧结钎焊之类的其他技术相称，因为它消除了热处理和组装的额外操作，并消除了这些工艺所固有的挫折。这项研究的重点是使用x射线衍射仪和能量色散谱等表征工具确定相变机理，并研究将含硼前驱体（Mo-Cr-Fe-Ni-FeB-MoB）烧结键合到普通碳钢上的过程。带状浇铸薄板中随着温度的升高而形成的含铁基基体的复合结构散布有复杂的硼化物。观察到锻造条件下的普通碳素钢和烧结粘结钢之间的硬度提高了五倍。该多层由邻近界面的反应区组成，并通过组成分布和硬度测量进行了研究。还提出了金属陶瓷与钢之间的烧结结合模型。

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