Безопасность техногенных и природных систем (Jun 2022)
Determination of mechanical properties of sintered dispersion-strengthened iron-based alloys depending on sintering conditions
Abstract
Introduction. The problem of creating new sintered materials is now in the center of attention of the entire domestic community in the field of powder metallurgy. Today, when creating a new class of structural materials, first of all, it is worth paying attention to their strength properties. The article considers technological features in the formation of highquality interparticle splicing of dispersion-strengthened materials. High-quality splicing is primarily determined by the mechanical properties of the alloys, which show the degree of its completeness during sintering. Depending on the density of the materials, the sintering temperature and the percentage of carbon that is introduced into the charge, the mechanical properties of the material also change. The determination of these properties is the main task of the research.Problem Statement. To determine the strength and plastic characteristics of the materials under consideration, it is necessary to analyze how these characteristics are affected by free carbon introduced into the charge. Determination of mechanical properties will allow us to recommend an alloy with the best characteristics for further research.Theoretical Part. As a theoretical description, the processes of sintering of dispersion-strengthened alloys, carbon homogenization, and the effect of compaction density and pressure on the mechanical properties of alloys are given.Conclusions. The obtained mechanical properties show that the addition of 0.8% carbon is sufficient to achieve high strength characteristics. However, the addition of carbon by 20-30% reduces the plastic characteristics of the alloys. The results obtained in this work will help to recommend the material for the manufacture of products with high performance properties.
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