Effect of Casting Method on Phase Composition of Heat-Resistant Austenitic Alloys Based on the Fe – 25% Cr – 35% Ni System

被引：0
作者：
S. Yu. Kondrat’ev
机构：
[1] Peter the Great St. Petersburg Polytechnic University,
来源：
Metal Science and Heat Treatment | 2022年 / 64卷
关键词：
heat-resistant alloy HP40NbTi; melt crystallization rate; microstructure; phase composition; chemical heterogeneity;
D O I：
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学科分类号：
摘要：
Methods of optical and electron microscopy and x-ray spectrum microanalysis are used to study the microstructure and the phase composition of alloy HP40NbTi produced by different casting methods. The effect of melt cooling rate within 1 – 1000 K/sec in the process of crystallization on chemical heterogeneity and quantitative proportion of chromium carbide to niobium carbide in the cast structure is investigated. It is shown that chemical heterogeneity of phases in the alloy is the highest when melt is cooled at a rate of 100 – 300 K/sec, which corresponds to crystallization conditions during welding and surfacing.
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页码：191 / 197
页数：6
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