Effects of Al and Ce on Microstructure and Properties of Bi-brass with Cutting-free

Xiao Lalrong; Tan Jing-li; Yi Danqing; Shu Xuepeng

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Effects of Al and Ce on Microstructure and Properties of Bi-brass with Cutting-free
Issue 4, Pages: 321-323(2008)
Published： 2008 ，
DOI：

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[1]肖来荣,覃静丽,易丹青,舒学鹏.Al、Ce对易切削铋黄铜组织和性能的影响[J].特种铸造及有色合金,2008(04):321-323+246.

Xiao Lalrong, Tan Jing-li, Yi Danqing, et al. Effects of Al and Ce on Microstructure and Properties of Bi-brass with Cutting-free. [J]. Special Casting & Nonferrous Alloys (4):321-323(2008)
[1]肖来荣,覃静丽,易丹青,舒学鹏.Al、Ce对易切削铋黄铜组织和性能的影响[J].特种铸造及有色合金,2008(04):321-323+246. DOI：

Xiao Lalrong, Tan Jing-li, Yi Danqing, et al. Effects of Al and Ce on Microstructure and Properties of Bi-brass with Cutting-free. [J]. Special Casting & Nonferrous Alloys (4):321-323(2008) DOI：

摘要

研制了一种性能优异的易切削铋黄铜来替代有毒的铅黄铜。为了改善铋黄铜的力学性能

在铋黄铜中添加了一定量的Al和Ce。采用光学显微镜、扫描电镜和X-衍射仪来分析铋黄铜的微观组织。分析可知

合金的组织细小

Bi均匀分布在基体中。与传统的铅黄铜比较

所研究的无铅铋黄铜具有优异的切削性能。合金的抗拉强度高于450MPa

伸长率高于35%。Al和Ce主要通过影响Bi在合金中的润湿效应

改变Bi在合金中的分布

从而对铋黄铜组织和性能产生影响。

Abstract

An environmental friendly Bi-brass with cutting-free and excellent properties was developed to substitute for Pb-brass.A proper amount of Al and Ce was added into the Bi-brass to improve its mechanical properties.The microstructure of Bi-brass containing Al and Ce was observed by OM（optical microscope）

SEM（scanning electron microscope） and XRD（X-ray diffractionmeter）.The observation results reveal that the alloy has fine microstructure with uniformly distributed Bi in the matrix.The machinability of the Bi-brass is greatly superior to that of conventional Pb-brass.The tensile strength and elongation of the alloy are more than 450 MPa and 35%

respectively

which is attributed to Al and Ce changing the distribution of Bi in the alloy by influencing the wettablity of Bi.