电弧超声对SiCp/6061Al复合材料等离子弧焊缝组织与接头性能的改善作用
Improving Effect of Arc-Ultrasonic on Microstructure and Properties of Weld in Plasma Arc Welding of SiCp/6061Al Composite
摘 要
通过高频调制等离子电弧激发出电弧超声,以Ti-6061Al合金片作为填充材料对SiCp/6061Al复合材料进行等离子弧(PAW)“原位”合金化焊接,并与常规PAW进行对比,研究了电弧超声对焊缝组织和性能的影响.结果表明:与常规PAW相比,电弧超声使焊缝组织明显细化,TiN、TiC等颗粒分布更加弥散,且无气孔、裂纹等缺陷,焊缝中没有发现脆性相Al4C3的生成;电弧超声使焊缝中心区硬度有一定程度下降;焊接接头抗拉强度提高到252 MPa,比常规PAW焊接接头的提高了约7%;同时拉伸断口韧窝数量明显增加,呈现出明显的韧性断裂特征.
SiCp/6061Al复合材料
等离子弧焊接
显微组织
arc-ultrasonic
SiCp/6061Al composite
plasma arc welding
microstructure
Abstract
The arc-ultrasonic could be excited by modulating the plasma arc through high frequency.Adding Ti-6061Al as filling material,the effect of arc-ultrasonic on microstructure and mechanical properties of joint of SiCp/6061Al composite in plasma arc “in-situ” alloying welding(PAW) was studied.And then it was compared with conventional PAW.The results show that to compared with conventional PAW,arc-ultrasonic could significantly refine the joint microstuctrue.TiN and TiC particles distributed more dispersively,and no brittle phase Al4C3 and defects such as pores and cracks had been found.The arc-ultrasonic made the hardness of the weld middle zone become lower and the strength of welding joints increased to 252 MPa,which was increased by 7% than that of conventional PAW.The number of dimple in the tensile fracture significantly increased,taking remarkable features of the ductile.
中图分类号 TG456 TG407
所属栏目 试验研究
基金项目 现代焊接生产技术国家重点实验室基金资助项目(09003)
收稿日期 2008/10/12
修改稿日期 2009/8/20
网络出版日期
作者单位点击查看
备注雷玉成(1962-),男,天津人,教授,博士.
引用该论文: LEI Yu-cheng,WANG Zhi-wei,FENG bo,JIANG Hai-lang. Improving Effect of Arc-Ultrasonic on Microstructure and Properties of Weld in Plasma Arc Welding of SiCp/6061Al Composite[J]. Materials for mechancial engineering, 2009, 33(12): 9～11
雷玉成,王志伟,冯波,蒋海浪. 电弧超声对SiCp/6061Al复合材料等离子弧焊缝组织与接头性能的改善作用[J]. 机械工程材料, 2009, 33(12): 9～11
被引情况:
【1】王鹏,程东锋,牛济泰, "高体积分数SiCp增强6063Al基复合材料的真空加压钎焊",机械工程材料 38, 34-38(2014)
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【7】LI X C,YANG Y,CHENG X D.Ultrasonic-assisted fabrication of metal matrix nanocomposites[J].J Mater Sci,2004,39:3211-3212.
【8】LEI Yu-cheng,YUAN Wei-jin,CHEN Xi-zhang,et al.“In-situ” weld-alloying plasma arc welding of SiCp/Al MMCs[J].Trans Nonferrous Met Soc,2007,17(2):313-317.
【9】赵玉厚,严文,周敬恩.Si、Mg对原位铝基复合材料中增强体Al3Ti形貌的影响[J].兵器材料科学与工程,2001,24(2):34-37.
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