Abstract
Flake graphite iron, compacted graphite iron and spheroidal graphite iron with various tensile strengths were cast. They were selected and grouped according to roughly the same tensile strength, and then the main cutting force in each group was measured and compared. The microstructures of different cast irons were characterized. The relationship between the cutting force and microstructure was established. Results show that the graphite morphology in cast irons determines the strength. In order to obtain the same strength of the cast iron with sharply edged graphite, more or finer pearlite in the matrix is needed. Graphitic cast irons with high pearlite content and smaller pearlite interlamellar spacing have higher hardness. For the cast irons with different graphite morphologies, but almost the same tensile strength, the main cutting force is obviously different, along with the hardness. Harder cast irons have a greater cutting force, but the difference in cutting force is not proportional to hardness.
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Male, born in 1992, Ph. D student. Research interests: modern surface technology, materials machining technology.
This study was supported by the China’s National Overseas Study Fund (CSC201808180001), the National Natural Science Foundation of China (U1804146) and the Program for Science and Technology Innovation Talents in Universities of the Henan Province (17HASTIT026).
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Ren, Jz., Li, Zl., Xiong, Y. et al. Effect of microstructure and mechanical properties on cutting force of different cast irons with similar tensile strength. China Foundry 16, 177–183 (2019). https://doi.org/10.1007/s41230-019-8136-4
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DOI: https://doi.org/10.1007/s41230-019-8136-4