Open AccessIMPACT OF COOLING CHARACTER ON STRUCTURE AND CTE OF INVARALLOY WITH 0,6% C
Author(s) -
А. С. Жилин,
С. В. Грачев,
С. М. Никифорова,
М. А. Рыжков,
Н. А. Попов,
V. V. Tokarev
Publication year - 2015
Publication title -
izvestiâ vysših učebnyh zavedenij. neftʹ i gaz
Language(s) - English
Resource type - Journals
ISSN - 0445-0108
DOI - 10.31660/0445-0108-2015-6-74-78
Subject(s) - graphite , invar , materials science , alloy , thermal expansion , volume fraction , cooling curve , dispersion (optics) , phase (matter) , carbon fibers , volume (thermodynamics) , crystallization , metallurgy , composite material , analytical chemistry (journal) , thermodynamics , composite number , chemistry , optics , chromatography , physics , organic chemistry
The qualitative and quantitative analysis of distribution of structural components (-phase + graphite) in the carbon-containing invar alloy with 0,6% C was conducted. It is demonstrated that velocity of crystallization produces a strong influence on the dispersion of graphite and on the volume fraction of graphite components in the alloy, i.e. at faster cooling the graphite volume fraction and its dispersion are noticeably higher than at slower cooling. The linear thermal expansion coefficient of both slowly cooled and fast cooled alloys maintains its values constant at heating temperatures lower 200 oC. However, in the alloy received as a result of fast cooling this coefficient values are lower than at slow cooling which can be explained by a lower content of carbon in the -phase, being a carrier of invar properties, of the slowly cooled alloy.