CA-MIG热源处理下钛/铝异质合金界面显微组织特性

doi:10.13228/j.boyuan.issn1006-9356.20210883

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摘要采用Al-Si5焊丝进行TC4钛/1060铝异质结构的CA-MIG连接,采用SEM、EDS等显微分析手段对不同热输入下所获接头的Ti/Al界面显微组织特点、界面附近元素分布进行分析,研究Ti/Al界面特性随热源热输入变化的演变规律。结果表明,CA-MIG热源热输入对Ti/Al界面显微组织具有显著影响。当热源热输入低于0.91 kJ/cm时,钛与铝基焊缝之间仅形成了一层界面反应层。当热源热输入处于0.91~1.55 kJ/cm时,钛与焊缝之间形成了两种Ti/Al界面,一种为单层结构的齿状Ti(Al,Si)₃;另一种由α-Ti(Al,Si)均匀层、Ti₅Si₃纳米颗粒+Ti(Al,Si)₃混合层、齿状Ti(Al,Si)₃层3层结构组成。当热源热输入超过1.55 kJ/cm后,除了上述两种Ti/Al界面外,局部微区钛合金发生熔化,与铝基焊缝之间形成了成分复杂的熔合区,熔合区内存在大量的裂纹缺陷。

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	王建宏
	魏守征
	饶文姬
	李志勇
	张英乔

关键词 ： CA-MIG热源, 钛合金, 铝合金, 异质连接, 显微组织

Abstract：The aluminum-based Al-Si5 wire was applied in Ti-TC4/1060Al dissimilar thermal joining. The analysis on microstructures and elements distributions of Ti/Al interfaces under different CA-MIG heat inputs was carried out using SEM and EDS to understand the evolvement law of Ti/Al interfacial features with the increasing of CA-MIG heat input. It was found that the Ti/Al interfacial microstructure changed obviously with the change of CA-MIG heat input. A single dentate Ti(Al,Si)₃ interfacial reaction layer was observed between titanium and aluminum base welds with the heat input lower than 0.91 kJ/cm. Two different Ti/Al interfaces were observed between titanium and the weld in a single sample with the heat input in the range of 0.91-1.55 kJ/cm. Except for the interface with a single dentate Ti(Al,Si)₃ layer, a multilayered structure including a thin uniform α-Ti(Al,Si) layer, a Ti(Al,Si)₃ layer dispersed with Ti₅Si₃ nanoparticals and a dentate Ti(Al,Si)₃ layer was observed. Once the heat input surpassed 1.55 kJ/cm, except the above two Ti/Al interfaces, the titanium was partially melted in certain part, and complex fusion zones were formed between titanium and weld metal, and a A large amount of micro cracks were observed in the fusion zone.

Key words： CA-MIG heating source titanium alloy aluminum alloy dissimilar joining microstructure

收稿日期: 2021-12-31

基金资助:国家自然科学基金青年基金资助项目(51805492); 山西省科技重大专项资助项目(20181101009)

作者简介: 王建宏(1978—), 男, 博士, 副教授; E-mail: wangjianhong@nuc.edu.cn

引用本文:

王建宏, 魏守征, 饶文姬, 李志勇, 张英乔. CA-MIG热源处理下钛/铝异质合金界面显微组织特性[J]. 中国冶金, 2022, 32(3): 55-60. WANG Jian-hong, WEI Shou-zheng, RAO Wen-ji, LI Zhi-yong, ZHANG Ying-qiao. Microstructure characteristics of Ti/Al interface using CA-MIG heating processing[J]. China Metallurgy, 2022, 32(3): 55-60.

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http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20210883 或 http://www.zgyj.ac.cn/CN/Y2022/V32/I3/55

[1]	郭雄伟,武张静,李宁,等. 钛/钢层合板轧制复合研究进展与展望[J]. 中国冶金,2021,31(3):1.
[2]	张侠洲,王凤会,陈延清,等. 焊接材料对双金属复合板焊接接头性能的影响[J]. 中国冶金,2018,28(7):31.
[3]	Kreimeyer M, Wagner F, Vollertsen F. Laser processing of aluminum-titanium-tailored blanks[J]. Optics and Lasers in Engineering, 2005, 43(9):1021.
[4]	Meoller F, Grden M, Thomy C, et al. Combined laser beam welding and brazing process for aluminum titanium hybrid structures[J]. Physics Procedia, 2011,12: 215.
[5]	WEI Shou-zheng, LI Ya-jiang, WANG Juan, et al. Use of welding-brazing technology on microstructural development of titanium/aluminum dissimilar joints[J]. Materials and Manufacturing Processes, 2014, 29(8): 961.
[6]	Sanders Daniel, Edwards Paul, Grant Glenn, et al. Superplastically formed friction stir welded tailored aluminum and titanium blanks for aerospace applications[J]. Journal of Materials Engineering and Performance, 2010, 19(4): 515.
[7]	Ulrike Dressler, Gerhard Biallas, Ulises Alfaro Mercado. Friction stir welding of titanium alloy TiAl6V4 to aluminium alloy AA2024-T3[J]. Materials Science and Engineering A, 2009, 526: 113.
[8]	MA Zhi-peng, WANG Chang-wen, YU Han-chen, et al. The microstructure and mechanical properties of fluxless gas tungsten arc welding-brazing joints made between titanium and aluminum alloys[J]. Materials and Design, 2013, 45: 72.
[9]	CHEN Shu-hai, LI Li-qun, CHEN Yan-bin, et al. Si diffusion behavior during laser welding-brazing of Al alloy and Ti alloy with Al-12Si filler wire[J]. Transactions of Nonferrous Metals Society of China, 2010, 20(1): 64.
[10]	WEI Shou-zheng, LI Ya-jiang, WANG Juan, et al. Microstructure characteristics of RuTi/Al1060 dissimilar joint by pulsed gas metal arc welding-brazing[J]. Kovove Mater-Metallic Materials, 2014, 52(5): 305.
[11]	WEI Shou-zheng, LI Ya-jiang, WANG Juan, et al. Microstructure and joining mechanism of Ti/Al dissimilar joint by pulsed gas metal arc welding[J]. International Journal of Advanced Manufacturing Technology, 2014, 70(5/6/7/8): 1137.
[12]	WEI Shou-zheng, LI Ya-jiang, WANG Juan, et al. Influence of welding heat input on microstructure of Ti/Al joint during pulsed gas metal arc welding[J]. Materials and Manufacturing Processes, 2014, 29(8): 954.
[13]	LI Jun-zhao, SUN Qing-jie, LIU Yi-bo, et al. Cold metal transfer welding-brazing of pure titanium TA2 to aluminum alloy 6061-T6[J]. Advanced Engineering Materials, 2017, 19: 1.
[14]	SUN Q J, LI J Z, LIU Y B, et al. Microstructural characterization and mechanical properties of Al/Ti welded by CMT method-assisted hybrid magnetic field[J]. Materials and Design, 2017, 116: 316.
[15]	MIAO Yu-gang, MA Zhao-wei, YANG Xiao-shan, et al. Experimental study on microstructure and mechanical properties of AA6061/Ti-6Al-4V joints made by bypass-current MIG welding-brazing[J]. Journal of Materials Processing Technolog, 2018, 260: 104.
[16]	WEI Shou-zheng, LI Ya-jiang, WANG Juan, et al. Formation of brittle phases during pulsed current gas tungsten arc welding of titanium to aluminum alloys[J]. Journal of Materials Engineering and Performance, 2014, 23(4): 1451.
[17]	Shant Prakash Gupta. Intermetallic compounds in diffusion couples of Ti with an Al-Si eutectic alloy[J] Materials Characterization, 2003, 49(4): 321.