The Ni-hard alloys white-cast irons are generally used for high wear work. Among them, those with better impact resistance because of its low carbon content compared to the rest of the family, are studied in this paper. One experimental technique of characterizing the metallic materials is the microstructural study. Several metallographic attacks intended to reveal qualitatively each microconstituent that forms the alloy, as well as the segregation and solidification structure of casting, are studied in this article. The use of color metallography is fundamental in this case to distinguish clearly the microconstituents. The main objective of this paper is to propose a series of attacks that identify each one of the microconstituents present in the alloy that has not been reported up to date.

中文翻译：

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合金白口铸铁Ni-Hard型的色相表征

镍硬合金白口铸铁通常用于高磨损工作。其中，由于碳含量低，与其他家族相比，具有更好的抗冲击性。表征金属材料的一种实验技术是微观结构研究。本文研究了几种金相学攻击，旨在定性地揭示形成合金的每种微成分，以及铸件的偏析和凝固组织。在这种情况下，使用彩色金相学是基本区分微成分的基础。本文的主要目的是提出一系列的攻击措施，以鉴定合金中存在的每种迄今尚未报道的微量成分。