工艺参数对镁钛异质金属超声波点焊接头拉伸性能及疲劳性能的影响

doi:10.3901/JME.2017.24.118

机械工程学报 ›› 2017, Vol. 53 ›› Issue (24): 118-125.doi: 10.3901/JME.2017.24.118

工艺参数对镁钛异质金属超声波点焊接头拉伸性能及疲劳性能的影响

赵德望¹, 任大鑫^2,3, 赵坤民^2,4, 郭杏林¹, 杨文平¹

1. 大连理工大学工程力学系大连 116024;
2. 大连理工大学汽车工程学院大连 116024;
3. 大连理工大学辽宁省先进连接技术重点实验室大连 116024;
4. 合肥工业大学工业与装备技术研究院合肥 230601

收稿日期:2016-11-21 修回日期:2017-04-17 发布日期:2017-12-20
通讯作者: 赵坤民(通信作者),男,1971年出生,教授,博士研究生导师,国家第八批千人计划专家。主要从事先进制造技术、金属冲压成形等研究。E-mail:kmzhao@dlut.edu.cn
作者简介:赵德望,男,1986年出生,博士研究生。主要从事制造工艺力学的科研工作。E-mail:dewangzhao@qq.com
基金资助:
国家自然科学基金（51205039，11472072）和大连理工大学基本科研业务费（DUT15LAB16）资助项目。

Effect of Welding Parameters on Tensile and Fatigue Properties of Ultrasonic Spot Welded Dissimilar Joints of Magnesium to Titanium Sheets

ZHAO Dewang¹, REN Daxin^2,3, ZHAO Kunmin^2,4, GUO Xinglin¹, YANG Wenping¹

1. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024;
2. School of Automotive Engineering, Dalian University of Technology, Dalian 116024;
3. Key Laboratory of Liaoning Advanced Welding and Joining Technology, Dalian University of Technology, Dalian 116024;
4. Institute of Industrial and Equipment Technology, Hefei University of Technology, Hefei 230601

Received:2016-11-21 Revised:2017-04-17 Published:2017-12-20

摘要/Abstract

摘要： 镁、钛等轻合金在工业上的广泛应用离不开其异质结构件的连接，作为应用较为广泛的固相焊技术，超声波点焊技术是实现高强度连接的有效途径之一。对镁钛异质金属进行超声波焊接，研究焊接参数对接头拉伸性能及疲劳性能的影响规律，用极差分析法和方差分析法研究焊接参数及参数间交互作用的影响权重，通过疲劳试验结果和Paris模型分析焊接参数对接头疲劳性能的影响。研究结果表明：在镁钛超声波焊接接头拉伸性能中，焊接压力是最显著影响因素，其次是焊接时间和焊接振幅，另外焊接时间与焊接振幅之间的交互作用对性能也有显著的影响。疲劳性能中，接头在不同的循环次数下失效模式不同，通过微观分析研究界面断裂机制，当接头达到高强度连接时，过高的焊接参数会导致镁板厚度降低，从而显著降低焊件的疲劳性能，其中焊接压力影响最为显著。

关键词: 超声波焊接, 焊接参数, 拉伸性能, 镁合金, 疲劳性能, 钛合金

Abstract: The wide application of light alloys such as magnesium and titanium in industry is closely related to the connection of their heterogeneous structures. As a widely used type of solid-phase welding, ultrasonic spot welding is an effective way to achieve connection of high strength materials. Ultrasonic welding is carried out on magnesium-titanium dissimilar metals to investigate the influences of welding parameters on the joint's tensile property and fatigue property. The analysis of range and variance are adopted to study the effect weights of the welding parameter and interactions between parameters. The fatigue test and Paris model are adopted to study the influences of welding parameters on the fatigue property. Results showed that, in the ultrasonic welding of magnesium and titanium, clamping force is the most significant factor, followed by vibration time and vibration amplitude; in addition, the interactions between vibration time and vibration amplitude, the interactions between vibration amplitude and clamping force also significantly impact the tensile strength. The highest strength can reach 3 762 N. The different cycle number leads to the different failure mode in fatigue test. The higher welding parameters leaded to the lower fatigue life when the welded joint reached higher joint strength. The clamping force significantly impact the fatigue property.

Key words: fatigue property, magnesium alloys, tensile property, titanium alloys, ultrasonic welding, welding parameter

中图分类号:

TG113

赵德望, 任大鑫, 赵坤民, 郭杏林, 杨文平. 工艺参数对镁钛异质金属超声波点焊接头拉伸性能及疲劳性能的影响[J]. 机械工程学报, 2017, 53(24): 118-125.

ZHAO Dewang, REN Daxin, ZHAO Kunmin, GUO Xinglin, YANG Wenping. Effect of Welding Parameters on Tensile and Fatigue Properties of Ultrasonic Spot Welded Dissimilar Joints of Magnesium to Titanium Sheets[J]. Journal of Mechanical Engineering, 2017, 53(24): 118-125.

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工艺参数对镁钛异质金属超声波点焊接头拉伸性能及疲劳性能的影响

Effect of Welding Parameters on Tensile and Fatigue Properties of Ultrasonic Spot Welded Dissimilar Joints of Magnesium to Titanium Sheets

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