Why same casting has different hardness and machine-ability properties?
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Answer Posted / Hari Om
The hardness and machinability of castings can vary due to differences in composition, microstructure, and heat treatment. Composition refers to the chemical makeup of the metal, which affects its inherent mechanical properties. Microstructure refers to the arrangement of grains within the casting, with finer grain structures generally providing better strength and machinability. Heat treatment alters the microstructure through processes like hardening, annealing, or precipitation hardening, leading to changes in hardness and machinability.
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