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

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第30卷    第12期    总第261期    2020年12月

[PDF全文下载]        

    

文章编号:1004-0609(2020)-12-2789-09
铝-镁异种合金板材超声焊接工艺
曹秒艳1, 2,田少杰1, 2,胡 晗1, 2,房凯旋1, 2

(1. 燕山大学 机械工程学院,秦皇岛 066004;
2. 燕山大学 河北省轻质结构装备设计与制备工艺技术创新中心,秦皇岛 066004
)

摘 要: 以6061铝合金和AZ31B镁合金板材为研究对象,采用单一变量法展开铝-镁异种合金板材超声焊接试验(振动频率为20 kHz)。以焊接参数(焊接压力、振幅、时间、焊件厚度)为单独变量展开焊件力学性能测试和焊件界面微观形貌观测。结果表明:当焊接压力小于0.3 MPa时,金属接触面之间摩擦热难以迅速生成,难以形成有效焊点;在以焊接振幅和焊接时间为单独变量的焊接试验中,当焊接振幅为8 μm、焊接时间为0.75 s时,焊件力学性能最佳;但是随上述参数进一步增加,导致焊接能量过大反而造成焊接力学性能下降;焊件厚度对焊接接头力学性能影响规律与焊接压力、振幅、时间基本一致,在焊件厚度为0.3 mm时达到最佳焊接效果,参数过大或过小均不利于有效焊接的形成;在维氏硬度测试中发现焊接硬度呈现由中心区域发散式扩散的硬度分布规律;随着焊接压力逐渐增加,焊件界面微观形貌呈现不同阶段特征,当呈现波浪形特征时焊接效果达到最佳。

 

关键字: 轻合金;超声金属焊接;力学性能;微观形貌

Ultrasonic welding technology of aluminum-magnesium alloy plates
CAO Miao-yan1, 2, TIAN Shao-jie1, 2, HU Han1, 2, FANG Kai-xuan1, 2

1.College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;
2. Hebei Light Structural Equipment Design and Manufacturing Technology Innovation Center, Yanshan University, Qinhuangdao 066004, China

Abstract:The ultrasonic with the vibration frequency of 20 kHz welding test of 6061 and AZ31B was conducted through single variable method. The samples with an independent variable welding parameters (welding pressure, amplitude, time, welding thickness) were tested for mechanical properties and interface micro-morphology. The results show that, when the welding pressure is less than 0.3 MPa, the heat of friction cannot be generated quickly between metal contact surfaces. Therefore, it is difficult to form the effective solder joints. In the welding test using welding amplitude and welding time as independent variables, the welding amplitude of 8 μm and welding time of 0.75 s will result in the best mechanical performance. However, with the further increase of the above parameters, the excessive welding energy will lead to mechanical degradation. The effect of welding thickness on mechanical properties of welding parts is consistent with welding pressure, amplitude and time, the welding effect is best when the welding part thickness is 0.3 mm, in appropriated parameter is not conducive to effective welding formation. In Vickers hardness test, the distribution of welding hardness appeared from the center to outward. With the increase of welding pressure, the interface micro-morphology of welded parts presents different stage characteristics. The welding effect is the best when the interface micro-morphology of the welded part presents the wave shape.

 

Key words: light alloy; ultrasonic metal welding; mechanical properties; micro-morphology

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

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

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com