Al-Pb偏晶合金连续凝固过程模拟.pdfVIP

46 6 Vol.46 No.6 2010 6 695—700 ACTA METALLURGICA SINICA Jun. 2010 pp.695–700 Al–Pb ∗ (, 110159) (, 110016) , ℄, Al–Pb , . : , , , , ; Pb , , , , . , , , ; , , , , . , – , ,  Æ TG113.12 A 0412−1961(2010)06−0695−06 MODELLING AND SIMULATION OF THE MICROSTRUC- TURE FORMATION IN A STRIP CAST Al–Pb ALLOY LI Haili Weaponry Science Technology Research Center, Shenyang Ligong University, Shenyang 110159 ZHAO Jiuzhou Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 Correspondent: ZHAO Jiuzhou, professor, Tel: (024 E-mail: jzzhao@imr.ac.cn Supported by National Natural Science Foundation of China (Nosand u0837601) Manuscript received 2009–11–24, in revised form 2010–03–12 ABSTRACT When a single–phase liquid is cooled into the miscibility gap, it decomposes into two liquid phases. Generally the liquid–liquid phase transformation causes the formation of a solidification microstructure with serious phase segregation. Many efforts have been made to use the liquid–liquid demixing phenomenon for the production of the finely dispersed metal–metal composite materials. It is demonstrated that the only effective method of preventing the formation of the microstructure with heavy phase segregation in monotectic alloys is using the rapid solidification processing techniques. Strip casting may have great potentials in the manufacturing of the bulk materials of this kind of alloys. In this paper, a model was developed to describe the microstructure formation in a strip cast