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<p>Increased corrosion resistance during operation in aggressive media, as well as high wear resistance, determine the need for products with intermetallic coatings based on Fe–Al alloys in the fields of mechanical and electrical engineering. In metallurgy, alloys of the Fe–Al system can also be used as alloying additives. Common methods that are currently used to produce such alloys and coatings mainly include multi-stage and energy-consuming processes, making it important to search for more feasible methods. One of the alternatives is a&#xa0;single-stage redox process for producing intermetallic alloys of the Fe–Al system by exothermic remelting of thermite charges that include iron scale and active aluminum as components. The chemical composition and properties of the finished products, obtained as a&#xa0;result of such processes, are largely determined by the ratio of the initial components in thermite mixtures, their pre-conditioning, and reaction conditions. The paper presents the results of an experimental study aimed at establishing the effect of preheating thermite charge and refractory mold on the aluminum content in the resulting iron-aluminum alloys produced by aluminothermy, their structure and microhardness values. The results are presented in comparison with the experimental data obtained without the combined effect of preheating thermite charges and molds.</p>

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Effect of preheating thermite charge and casting mold on the characteristics and structure of iron-aluminum alloys produced by aluminothermy

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • S. G. Zhilin,
  • V. V. Predein,
  • V. A. Khudyakova,
  • N. A. Bogdanova

摘要

Increased corrosion resistance during operation in aggressive media, as well as high wear resistance, determine the need for products with intermetallic coatings based on Fe–Al alloys in the fields of mechanical and electrical engineering. In metallurgy, alloys of the Fe–Al system can also be used as alloying additives. Common methods that are currently used to produce such alloys and coatings mainly include multi-stage and energy-consuming processes, making it important to search for more feasible methods. One of the alternatives is a single-stage redox process for producing intermetallic alloys of the Fe–Al system by exothermic remelting of thermite charges that include iron scale and active aluminum as components. The chemical composition and properties of the finished products, obtained as a result of such processes, are largely determined by the ratio of the initial components in thermite mixtures, their pre-conditioning, and reaction conditions. The paper presents the results of an experimental study aimed at establishing the effect of preheating thermite charge and refractory mold on the aluminum content in the resulting iron-aluminum alloys produced by aluminothermy, their structure and microhardness values. The results are presented in comparison with the experimental data obtained without the combined effect of preheating thermite charges and molds.