Open AccessIncreasing the Strength Properties of Gray Iron Castings without Introducing Additional Modifying and Alloying Additives into Its Composition
Author(s) -
N. I. Gabelchenko,
Н. А. Кидалов,
A. A. Belov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/969/1/012063
Subject(s) - foundry , materials science , ultimate tensile strength , metallurgy , mold , cast iron , crystallization , gray iron , composite material , chemistry , organic chemistry
The effect of the differential cooling regimes on the structure and strength properties of gray iron castings in sand molds was investigated. The experimental foundry equipment was developed and assembled in order to produce experimental and control castings. This equipment allows to investigate the crystallization of two castings under initially equal pouring conditions: chemical composition, temperature and speed of mold filling with molten metal. It was shown that due to the using of the differential cooling regimes the experimental castings tensile strength was increased by 13.8% and hardness reduced by 12.3% via excluding the formation of ledeburite in the structure, which leads to increase in the quality index of cast iron by 33%.