Investigation of the nitride phase in a heat-resistant alloy of the Ni – Co – W – Ti system, hardened by internal nitration

Physics and Chemistry of Materials Treatment Pub Date : 1900-01-01 DOI:10.30791/0015-3214-2021-2-63-71

S. Ovsepyan, Fsue “Viam”, Y. Kolobov, M. V. Akhmedzyanov, S. Manokhin, E. Filonova, I. Ras

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Abstract

In a high-temperature alloy of the Ni – Co – Cr – W – Ti system grade VZh171, using X-ray spectral analysis, scanning and transmission electron microscopy, the composition of the particles of the hardening phase — nitrides after internal nitriding and subsequent heat treatment was studied. It was found that the particles differ on it chemical composition: the main constituent element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases. It was found that the nitrides formed during nitriding are compounds in which the main forming element, titanium or chromium, is proportionally replaced by other alloy components. The nitride compositions near the surface and in the center of the sample differ in the titanium to chromium ratio. After annealing, this difference is smaller, and the chromium content also decreases.

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内氮化硬化Ni - Co - W - Ti系耐热合金氮化物相的研究

在Ni - Co - Cr - W - Ti体系牌号VZh171高温合金中，采用x射线光谱分析、扫描电镜和透射电镜研究了内渗和热处理后硬化相氮化物颗粒的组成。结果发现，颗粒的化学成分不同:主要成分钛或铬按比例被其他合金成分所取代。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。结果表明，在氮化过程中形成的氮化物是主要形成元素钛或铬按比例被其他合金成分取代的化合物。在钛铬比中，样品表面附近和中心的氮化物组成不同。退火后，这种差异变小，铬含量也降低。

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Physics and Chemistry of Materials Treatment

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