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Bi 첨가된 무연황동의 고온 연성에 미치는 첨가원소의 영향
장영환,김상식,김인상,한승전 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.7
In the present study, the effects of P and/or Misch metal (Ms) on the microstructure and high temperature tensile behavior of Bi-added, Pb-free brass were examined. It was found that the tensile ductility of Bi-added. Pb-free brass decreased significantly at 300℃. The addition of P and/or Ms, on the other hand, greatly improved elevated temperature tensile ductility of the present alloy. The microstructural observation demonstrated that the formation of Bi film along the α-β, phase boundary. which is the main cause for the low tensile ductility at elevated temperature, was substantially reduced with the addition of P and/or Ms. The retarded Bi film formation was believed to be due to the thermally stable Bi-related compounds formed in Bi-added, Pb-free brass. (Received April 8, 2004)