Relationship between Dendritic Structure of Grey Cast Iron and Mechanical Properties of Castings

Abstract:

The relationship between tensile strength σ_В and Brinell hardness HB of different grey cast irons was investigated. It was found that at the same hardness values the tensile strength of different specimens may differ by almost two times. It was shown that the mentioned above tensile strength scatter is caused by the different volume fraction of dendritic crystals of a primary austenite f_dc. The quantitative relationships between σ_B and f_dc for in situ tensile strength assessment were established. The comparison of σ_B values calculated through Brinell hardness HB and through volume fraction of dendritic crystals f_dc shows that the latter method developed in the present paper provides more reliable results.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 1071-1075
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.1071
• Online since: September 2017
• Authors: Aleksandr A. Baron, Lyubov' V. Palatkina, I.L. Gonik*
• Keywords: Brinell Hardness, Dendritic Crystals of Primary Austenite, Flake Graphite, Gray Cast Iron for Thin-Walled Housing Castings, Perlite, Tensile Strength

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