Influence of Alloying on the Uniformity of Strength and Structure of Gray Iron

Abstract:

Two gray cast irons with equal tensile strength were prepared to investigate the influence of alloying on the machinability of gray iron. After 75SiFe modifying treatment, they were alloyed by the mixture additive containing RE, Cr, Mn, Si and Fe with a certain proportion and pure copper, respectively. The hardness, section sensitivity, structuralhomogenity and machinability were tested in this experiment. The results show that both of the gray irons have the same brinell hardness and the micro-hardness. The section sensitivity of the gray iron alloyed by the mixture additive is smaller than the gray iron alloyed by copper. The main cutting force of the cast iron alloyed by the mixture additive is lower than that of the cast iron alloyed by copper, therefore, the gray cast iron alloyed by the mixture additive has a better machinability than the cast iron alloyed by copper.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 3348-3352
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.3348
• Online since: March 2012
• Authors: Li Li Xiao, Feng Zhang Ren, Meng Qi Liu, Yu Fei Wang, Na Wen Zhang, Rui Wu
• Keywords: Gray Cast Iron, Hardness, Machinability, Section Sensitivity

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