Development of a Technology of Production of a Hafnium–Nickel Master Alloy in a Vacuum Arc Furnace for the Alloying of Cast Nickel Superalloys

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING Russian Metallurgy (Metally) Pub Date : 2024-03-19 DOI:10.1134/S0036029523700052

P. G. Min, N. S. Pitelin, V. E. Vadeev

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Abstract

A technology of producing a high-quality hafnium–nickel GfNi10 master alloy is developed: it is produced in a vacuum arc furnace with a nonconsumable electrode using a preliminary annealed pressed electrolytic hafnium powder. The total content of impurities and oxygen and nitrogen gases in the master alloy is found to be substantially lower than that in a serial GFN-10 master alloy. The character of interaction of the master alloy with the nickel melt during vacuum induction melting of the new VZhM200 cast nickel superalloy shows that, in contrast to a GFN-10 master alloy, the GfNi10 master alloy produced in VIAM gives no melt splashes during the introduction of the master alloy; this increases the assimilation of hafnium. The chemical composition and mechanical properties of a serial VKNA-1VR alloy and the new VZhL125 nickel superalloy melted with the developed master alloy correspond to the requirements of specifications for these alloys. In addition, high hafnium assimilation and low contents of gas impurities are ensured.

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开发在真空电弧炉中生产铪镍母合金的技术，用于铸造镍超合金的合金化

开发了一种生产高质量铪镍 GfNi10 母合金的技术：使用初步退火的压制电解铪粉末，在真空电弧炉中用非消耗性电极生产母合金。发现母合金中的杂质、氧气和氮气的总含量大大低于系列 GFN-10 母合金。在真空感应熔炼新型 VZhM200 铸造镍超合金的过程中，母合金与镍熔体的相互作用特征表明，与 GFN-10 母合金相比，在 VIAM 中生产的 GfNi10 母合金在引入母合金的过程中不会产生熔体飞溅；这增加了铪的同化。用开发的母合金熔化的系列 VKNA-1VR 合金和新型 VZhL125 镍超级合金的化学成分和机械性能符合这些合金的规格要求。此外，还确保了高铪同化和低气体杂质含量。

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来源期刊

Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

0.70

自引率

25.00%

发文量

140

期刊介绍： Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.