Co-20Ni-9Al-7W-3Re-2ti高温合金的初步组织表征

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Journal of Mining and Metallurgy Section B-Metallurgy Pub Date : 2021-01-01 DOI:10.2298/jmmb210309044t

A. Tomaszewska

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引用次数: 0

摘要

本文对Co-20Ni-9Al-7W-3Re-2Ti型新型co基高温合金的初次组织进行了表征。以纯原料为原料，采用感应熔炼法制备了该合金。Co-Al-W-X多组分合金铸造工艺的根本技术问题是合金元素，特别是钨和铼的枝晶间偏析。分析表明，合金元素偏析的影响明显大于Co-9Al-9W和Co-20Ni-7Al-7W合金，这与钛、镍和铝向枝晶间空间的迁移有关。因此，枝晶区和枝晶间钨浓度梯度高于Co-9Al-9W和Co-20Ni-7Al-7W合金。同样的情况在铼和钴的情况下，但Co的浓度在枝晶间区略低。

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Primary microstructure characterization of Co-20Ni-9Al-7W-3Re-2ti superalloy

The characterization of the primary microstructure of the new Co-based superalloy of Co-20Ni-9Al-7W-3Re-2Ti type was shown in this article. The investigated alloy was manufactured by induction melting process from pure feedstock materials. The fundamental technological problem related to Co-Al-W-X multicomponent alloys' casting process is a strong susceptibility to interdendritic segregation of alloying elements, especially tungsten and rhenium. The performed analysis revealed that the observed effect of alloying elements segregation is detectable and much stronger than for Co-9Al-9W and Co-20Ni-7Al-7W alloys, related to titanium, nickel and aluminium migration to inter-dendritic spaces. Consequently, the tungsten concentration gradient between dendritic and interdendritic zones is higher than for Co-9Al-9W and Co-20Ni-7Al-7W alloys. The same situation is in the case of rhenium and cobalt, but Co's concentration in the interdendritic zone is only slightly lower.

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来源期刊

Journal of Mining and Metallurgy Section B-Metallurgy 工程技术-冶金工程

CiteScore

2.00

自引率

40.00%

发文量

审稿时长

2 months

期刊介绍： University of Belgrade, Technical Faculty in Bor, has been publishing the journal called Journal of Mining and Metallurgy since 1965 and in 1997 it was divided in two independent journals dealing with mining and metallurgy separately. Since 2009 Journal of Mining and Metallurgy, Section B: Metallurgy has been accepted in Science Citation Index Expanded. Journal of Mining and Metallurgy, Section B: Metallurgy presents an international medium for the publication of contributions on original research which reflect the new progresses in theory and practice of metallurgy. The Journal covers the latest research in all aspects of metallurgy including hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, solidification, mechanical working, solid state reactions, materials processing, surface treatment and relationships among processing, structure, and properties of materials.