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Структурообразование прецизионных сплавов при быстрой закалке из расплавов

Структурообразование прецизионных сплавов при быстрой закалке из расплавов

Abstract

Рассмотрены основные принципы с точки зрения кинетики кристаллизации возможности образования аморфной структуры металлического сплава при его быстрой закалке из расплава, при этом частота зарождения и скорость роста кристаллов определяется физико-химическими свойствами сплава, а скорость охлаждения – теплофизическими условиями его затвердевания. На примере сплавов систем Fe–Cr–Ni–Mo–Co–B–Si, Fe–Cr– –Ni–Mo–Mn–Al–B–C, Fe–Al–P–C построены их ТВП-диаграммы и кривые охлаждения. Анализ кривых ТВП-диаграмм первых двух сплавов показал, что при спиннинговании их расплавов аморфное состояние ограничивается толщиной волокон в пределах 75–90 мкм, тогда как для третьего сплава аморфное состояние возможно при толщине волокна более 200 мкм. The basic principles of the amorphous metal alloy structure formation are considered from the point of view of the crystallization kinetics during its rapid quenching from the melt, while the nucleation rate and crystal growth rate being determined by the alloy physical and chemical properties, and the cooling rate being determined by the thermophysical conditions of its hardening. Using the example of the alloy systems Fe–Cr–Ni–Mo–Co–B–Si, Fe–Cr–Ni–Mo– –Mn–Al–B–C, Fe–Al–P–C, their TTT diagrams and cooling curves are plotted. The TTT diagram analysis of the first two alloys has shown that when their melts are spinning, the amorphous state is limited by a fiber thickness of 75–90 μm, whereas for the third alloy the amorphous state is possible with a fiber thickness of more than 200 μm.

Keywords

кинетика кристаллизации, ТВП-диаграммы, аморфный сплав, температура стеклования, скорость охлаждения, быстрая закалка из расплава, структура

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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
Green