발간논문

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Vol.14, No.5, 505 ~ 513, 1976
Title
Effect of Cooling Rate on Machinability and Mechanical Properties of Free Cutting Brass
강일구 , 유연철 Il Koo Kang , Yeon Chul Yoo
Abstract
The effects of cooling rate on the machinability and other mechanical properties of free cutting brass were examined through sand mold, metal mold and water-cooled metal mold casting respectively. When the cooling rate was rapid, the lead particles were finely dispersed throughout the matrix and the β-phases appeared to be needlelike, when the cooling rate was slow, the lead particles formed themselves into large spheroids mainly along the grain boundaries while the β-phases shaped into plates. The machinability and mechanical properties turned out satisfactory in the case of rapid cooling rate.
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