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Моделирование фазового состава металла сварных швов сплава хн70тю

Моделирование фазового состава металла сварных швов сплава хн70тю

Abstract

В настоящей работе разработана математическая модель термодинамики фазовых превращений, позво-ляющая всесторонне исследовать равновесный фазовый состав сварных швов хромоникелевых сплавов при различных температурах. Согласно модели при содержании хрома более 22 мас. % температура начала выделения интерметаллидов превышает солидус сплава Cr-Ni, т.е. в этом случае термодинамиче-ски возможно выделение первичных интерметаллидов Ni3Al. Первичные выделения Ni3Ti вероятны при содержании хрома более 36 %. Для повышения прочности сварного шва рассматриваемого сплава реко-мендовано замедленное охлаждение шва в интервале ниже 10000С и, в зависимости от рабочей темпера-туры сварной конструкции, старение в интервале интенсивного выделения гамма-фазы – 900-6000С. Разрабо-танная математическая модель термодинамики фазовых превращений может быть использована для исследования фазового состава и других хромоникелевых сплавов.

In this paper, the mathematical model of the thermodynamics of phase transformations, allowing comprehen-sively investigate the equilibrium phase composition of the weld nickel-chromium alloys at different temperatures. According to the model when the chromium content of more than 22 wt. % Tempera-round selection start intermetallic alloy solidus exceeds Cr-Ni, ie in this case, thermodynamics, dynamical possible allocation of pri-mary intermetallic Ni3Al. Initial allocation Ni3Ti likely with chromium content of more than 36%. To improve the weld strength of the alloys recommended slow cooling in the range below the seam 10000 С and, depending on the operating temperature of the welded structure, aging in the range of emission rates of gamma phase 900-6000 C. The developed mathematical model of the thermodynamics of phase transformations can be use to IC The phase composition and other chromium-nickel alloys.

Keywords

ИНТЕРМЕТАЛЛИДНЫЕ ФАЗЫ, ДИСПЕРСИОННОЕ УПРОЧНЕНИЕ, ТЕРМОДИНАМИКА, ХРОМОНИКЕЛЕВЫЕ СПЛАВЫ, СВАРНЫЕ ШВЫ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold