Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第22卷    第5期    总第158期    2012年5月

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文章编号:1004-0609(2012)05-1421-09
无铅磷钙黄铜的组织与性能
朱权利1,张先满1,罗良颂2,李  微1,陈维平1,汪桂龙2,李  晨2

(1. 华南理工大学 国家金属材料近净成形工程技术研究中心,广州 510640;
2. 广东华金合金材料实业有限公司,广州 511356
)

摘 要: 通过熔铸方法,于中频感应炉中制备无铅磷钙黄铜铸锭,利用扫描电镜、电子能谱仪、电子万能试验机及卧式车床等手段,研究磷钙黄铜合金的显微组织和力学、切削及耐脱锌腐蚀性能,并结合切屑的形貌观察,分析金属间化合物对切削性能的改善作用。结果表明:磷、钙显著改变了黄铜的组织与性能,使得磷钙黄铜的组织由α相、β相和分布在晶界上及晶粒内的金属间化合物颗粒组成;无铅磷钙黄铜合金的主要成分(质量分数)为57%~60% Cu、40% Zn、0.7% P、0.5% Ca时,合金显示出优良的综合性能,其抗拉强度为362.7 MPa,伸长率为15.0%,布氏硬度为105.0HB,耐脱锌腐蚀深度为321.9 µm,切削性能与铅黄铜HPb59−1相当。

 

关键字: 无铅;磷钙黄铜;显微组织;金属间化合物;性能

Microstructure and properties of lead-free P-Ca brasses
ZHU Quan-li1, ZHANG Xian-man1, LUO Liang-song2, LI Wei1,
CHEN Wei-ping1, WANG Gui-long2, LI Chen2

1. National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,
South China University of Technology, Guangzhou 510640, China;
2. Guangdong Hua Jin Advanced Alloys Industrial Company Limited, Guangzhou 511356, China

Abstract:The ingots of P-Ca brass were prepared in a medium frequency induction furnace through scientific casting process. The microstructure and mechanical, cutting and dezincification corrosion-resistance properties of P-Ca brass were studied by scanning electron microscopy (SEM), energy dispersive spectrometer(EDS), electron universal test machine and lathe, the effect of the intermetallics on the cutting performance was also studied through the observation of chips. The results show that, P and Ca change the microstructure and properties of brass alloys significantly, making the microstructure of P-Ca brass composed of α, β and intermetallic compounds dispersed on grain boundaries and in   grains. The reasonable contents (mass fraction) of main elements are 57%−60% Cu, 40% Zn, 0.7% P and 0.5% Ca. The brass alloy containing this component has good performances as follows: tensile-strength of 362.7 MPa, elongation of 15.0%, Brinell hardness of 105.0HB, dezincification depth of 321.9 µm, and the cutting property is as well as that of HPb59−1.

 

Key words: lead-free; P-Ca brass; microstructure; intermetallics; property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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