Solidification Behavior of Bi in Se-Bi Brass

Yang Bin~ 1; Xie Jianxin~1; Zhang Lina~2; Liu Baixiong~2; Xiong Shixian

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Solidification Behavior of Bi in Se-Bi Brass
Issue 1, Pages: 75-77(2007)
Published： 2007 ，
DOI：

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[1]杨斌,谢建新,张丽娜,刘柏雄,熊仕显.硒铋黄铜中铋的铸造凝固行为研究[J].特种铸造及有色合金,2007(01):75-77+12.

Yang Bin~ 1, Xie Jianxin~1, Zhang Lina~2, et al. Solidification Behavior of Bi in Se-Bi Brass. [J]. Special Casting & Nonferrous Alloys (1):75-77(2007)
[1]杨斌,谢建新,张丽娜,刘柏雄,熊仕显.硒铋黄铜中铋的铸造凝固行为研究[J].特种铸造及有色合金,2007(01):75-77+12. DOI：

Yang Bin~ 1, Xie Jianxin~1, Zhang Lina~2, et al. Solidification Behavior of Bi in Se-Bi Brass. [J]. Special Casting & Nonferrous Alloys (1):75-77(2007) DOI：

摘要

研究了铋对硒铋黄铜组织与性能的影响。对组织分析以及拉伸断口观察表明

铋含量对硒铋黄铜铸造性能有明显影响

铋以单质形式分布在α相与β相的相界上;铋的质量分数在1·0%以下时

铋以颗粒状凝固在相界上;当铋的质量分数达到2·0%时

铋以块状凝固于相界上;当铋的质量分数超过2·5%时

出现连续膜。通过热力学分析

探讨了铋的凝固析出机制。

Abstract

Effects of Bi on microstructure and properties of Se-Bi brass have been investigated by microstructural analysis and tensile fracture observation.The results show that single Bi is distributed in the boundary of α phase and β phase

sharply affecting the castability of the Se-Bi brass.Particle Bi phase is distributed on the phase boundary with Bi content less than 1.0%

and the bulky Bi phase is distributed on the boundary with about 2% Bi content

moreover

continuous film occurs in the boundary with Bi content more than 2.5%.The segregation mechanism of Bi was approached based on thermo-kinetics analysis.