摘要
采用二步重熔法制备了不同种类(Pb-Pr、Pb-Sm、Pb-Nd)及不同含量(0.1%、0.5%、1.0%、1.5%、2.0%)的铅基稀土合金,研究了稀土元素种类及含量对合金抗拉强度及金相组织的影响规律。结果表明:Pr、Sm、Nd的加入均能不同程度地提高合金强度,且随着稀土元素含量的增加合金强度呈不同程度的提高;各稀土元素对提高合金抗拉强度的效果为:Pr>Sm>Nd;Nd、Sm与Pb生成了金属间化合物且在晶粒界面上析出,有利于合金强度的提高;Pr除了生成金属间化合物外,还能细化合金晶粒,阻止晶粒滑移,这也是提高合金抗拉强度的主要原因之一。
The different types （Pb-Pr,Pb-Sm,Pb-Nd） and different RE contents （0.1%、0.5%、1.0%、1.5%、2.0%） of Pb-RE alloys were prepared by two-stage remelting,and the study was made on the influence rule of the content and type of rare earth element on the tensile strength and microstructure of the alloy. The results show that addition of Pr,Sm,Nd can improve the strength of the alloy in different level, and with the increase of content of rare earth elements the strength of the alloy can improve in different degree. The extent of the effect of RE elements on improving the tensile strength of the alloy goes as follows： Pr〉Sm〉Nd. Nd,Sm and Pb generate intermetaliic compound and precipitate on the grain interface,bene- ficial for the alloy strength improvement. Besides generating intermetallic compound,Pr can also refine alloy grains and prevent grain slip, as is also one of the most important factors to improve the tensile strength of the alloy.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2014年第4期46-51,共6页
Rare Metals and Cemented Carbides
基金
国家自然科学基金项目(51364016)
关键词
Pb—RE合金
铜电积
二步重熔法
抗拉强度
金相组织
Pb-RE alloy
copper electrowinning
two-stage remelting method
tensile strength
metallographic structure
作者简介
通讯作者：朱茂兰（1978-），女，硕士，讲师，主要从事新型金属材料研究，Email：zhumaolan@163.com.
