Open AccessScientific problem of modifying of primary crystals a β -phase of silumin castings. Solutions
Author(s) -
Е. И. Марукович,
В. Ю. Стеценко
Publication year - 2019
Publication title -
litʹë i metallurgiâ
Language(s) - English
Resource type - Journals
eISSN - 2414-0406
pISSN - 1683-6065
DOI - 10.21122/1683-6065-2019-2-36-38
Subject(s) - crystallization , primary (astronomy) , materials science , phase (matter) , oxygen , metallurgy , microstructure , chemical engineering , chemistry , organic chemistry , physics , engineering , astronomy
It is shown that the phosphorum which is contained in a silumin melt in number of 0,01–0,04% exists in the dissolved form. For a solution of the problem of modifying of primary crystals of a β -phase in silumin castings it is necessary to accept a presumption that the oxygen adsorbed by a melt promotes decay and hinders the formation of crystallization centers of primary crystals of a β -phase. The role of phosphorum comes down to reduction of concentration of the adsorbed oxygen which works as the demodifier of primary microstructure of castings.