Wetting and Interface Microstructures of Copper Alloy on Titanium and Steel Surfaces under Cold Metal Transfer Condition

doi:10.3901/JME.2020.06.110

Abstract

Abstract: The wetting behavior and interface characteristics of ERCuNiAl copper alloy on the surface of bare steel plate, galvanized steel plate and pure titanium plate are studied under cold metal transfer condition. The results show that the wettability of copper alloy on bare steel, galvanized steel and pure titanium surfaces increase with the increase of wire feeding speed, the wettability of copper alloy on the surface of bare steel is better than that of galvanized steel under the same wire feeding speed. This system is a typical temperature-dependent wetting system. When copper alloy is wetted on the surface of galvanized steel, the temperature of interfacial reaction decreases because the heat was taken away by the volatilization of zinc in the galvanized layer, resulting in weak interfacial reaction and poor wettability. Under the action of arc, zinc-rich zone is formed around the copper droplet, in which aluminum is enriched and AlFeZn₈ and Al₅Fe₂ compounds are formed. When copper alloy is wetted on the surface of bare steel, due to the strong affinity between aluminum and iron, aluminum in the welding wire can easily react on the interface under the action of arc, thus the obvious Cu-Fe-Al interface reaction layers were formed. When copper alloy is wetted on the surface of pure titanium, due to the low solid solubility of Ti in Cu, copper and titanium are mixed to form an obvious interface reaction layer under the action of arc, which is mainly composed of TiCu, Ti₂Cu and a-Ti.

Key words: titanium-steel dissimilar metal, cold metal transfer, wetting behavior, interface characteristics

CLC Number:

TG422

CHANG Jinghuan, CAO Rui, LIN Qiaoli. Wetting and Interface Microstructures of Copper Alloy on Titanium and Steel Surfaces under Cold Metal Transfer Condition[J]. Journal of Mechanical Engineering, 2020, 56(6): 110-117.

References

[1] GUO Shun,ZHOU Qi,KONG Jian,et al. Effect of beam offset on the characteristics of copper/304stainless steel electron beam welding[J]. Vacuum,2016,128:205-212.
[2] 李继红,谢威威,杨军,等.钛/钢复合板熔化焊接头的组织和性能[J].金属热处理,2016,41:48-52. LI Jihong,XIE Weiwei,YANG Jun,et al. Microstructure and properties of melting welded joint of Ti/steel composite plates[J]. Heat Treatment of Metals,2016,41:48-52.
[3] 胡泷艺,王文平.电厂烟囱用钛钢复合板焊接工艺分析[J].机械研究应用,2016,29(4):160-165. HU Longyi,WANG Wenping. Welding process analysis on the titanium clad steel plate of power plant chimney[J]. Mechanical Research Application,2016,29(4):160-165.
[4] 单磊. TC4钛合金-钢复合激光焊接工艺研究[D].杭州:浙江大学,2006. SHAN Lei. Research on laser beam welding TC4 titanium alloy to steel[D]. Hangzhou:Zhejiang University,2006.
[5] 褚巧玲. TA1/Q345层状复合板焊接机理及其组织演变行为研究[D].西安:西安理工大学,2017. CHU Qiaoling. Fusion welding on TA1/Q345 lamellar structure and joint microstructure evolution[D]. Xi'an:Xi'an University of Technology,2017.
[6] LI L B,SUN Y F. Handbook of metal materials[M]. Beijing:China Machine Press,2011.
[7] MASSALAKI T B. Binary alloy phase diagrams[M]. OH:ASM International,1990.
[8] 李标峰.钛与钢及钛复合钢板的焊接性研究(Ⅱ)[J].材料开发与应用,2004,19(2):45-46. LI Biaofeng. Study on the weldability of titanium and steel and titanium clad steel plate (Ⅱ)[J]. Development and Application of Materials,2004,19(2):45-46.
[9] 王廷,张秉刚,陈国庆,等.钛/钢异种金属焊接存在问题及研究现状[J].焊接,2009(9):29-33. WANG Ting,ZHANG Binggang,CHEN Guoqing,et al. Problems and research status of welding of dissimilar metals between titanium alloy and steel[J]. Welding Joining,2009(9):29-33.
[10] WANG Ting,ZHANG Binggang,WANG Houqin,et al. Microstructures and mechanical properties of electron beam-welded titanium-steel joints with vanadium,nickel,copper and silver filler metals[J]. Journal of Materials Engineering and Performance,2014,23(4):1498-1504.
[11] LEE J G,LEE M K. Microstructure and mechanical behavior of a titanium-to-stainless steel dissimilar joint brazed with Ag-Cu alloy filler and an Ag interlayer[J]. Materials Characterization,2017,129:98-103.
[12] ZHANG Binggang,WANG Ting,CHEN Guoqing,et al. Contact reactive joining of TA15 and 304 stainless steel via a copper interlayer heated by electron beam with a beam deflection[J]. Journal of Materials Engineering and Performance,2012,21(10):2067-2073.
[13] CHANG Jinghuan,CAO Rui,YAN Yingjie. The joining behavior of titanium and Q235 steel joined by cold metal transfer joining technology[J]. Materials,2019,12(15):2413-2429.
[14] HAO Xiaohu,DONG Honggang,XIA Yueqing,et al. Microstructure and mechanical properties of laser welded TC4 titanium alloy/304 stainless steel joint with (CoCrFeNi)100-xCux high entropy alloy interlayer[J]. Journal of Alloys and Compounds,2019,803:649-657.
[15] WEIRAUCH D A Jr,KRAFICK W J. The effect of carbon on wetting of aluminum oxide by aluminum[J]. Metallurgical Transactions A,1990,21A:1745-1751.
[16] NOGI K,OKUD Y,OGINA K,et al. Wettability of diamond by liquid pure metals[J]. Materials Transactions JIM,1994,35(3):156-160.
[17] LAURENT V,CHATAIN D,CHATILION C,et al. Wettability of monocrystalline alumina by aluminium between its melting point and 1273 K[J]. Acta Metallurgica,1994,36(7):1797-1803.
[18] BANERJI A,SURAPPA M K,ROHATGI P K. Cast aluminum alloys containing dispersions of zircon particles[J]. Metallurgical Transactions B,1983,14B:273-283.
[19] CAO Rui,CHANG Jinghuan,HUANG Qian,et al. Behaviors and effects of Zn coating on welding-brazing process of Al-steel and Mg-steel dissimilar metals[J]. Journal of Manufacturing Processes,2018,31:674-688.
[20] ABDOLLAHZADEH A,SHOKUHFAR A,CABRERA J M,et al. The effect of changing chemical composition on dissimilar Mg/Al friction stir welded butt joints using zinc interlayer[J]. Journal of Manufacturing Processes,2018,34:18-30.
[21] KAR A,KAILAS S V,SUWAS S. Effect of mechanical mixing in dissimilar friction stir welding of aluminum to titanium with zinc interlayer[J]. Trans. Indian. Inst. Met.,2019,72(6):1533-1536.
[22] LIN Qiaoli,YANG Fan,CAO Rui,et al. Wetting and interfacial characteristics of Mg AZ61 alloy/galvanized steel in cold metal transfer process[J]. Metall. Mater. Trans. A,2015,46A:3793-3796.
[23] GALE W F,FERGUS J W,INGRAM W M. Wettability of NiAl by a liquid Ni-Si-B alloy[J]. Journal of Materials Science,1997,32(18):4931-4940.
[24] PRINCE A,VILLARS P,OKAMOTO H. Handbook of ternary phase alloys[M]. OH,USA:ASM International,1995.
[25] YOUNG T. An Essay on the cohesion of fluids[J]. Philosophical Transactions of the Royal Society of London,1805,94:65-87.
[26] MA G F,YE H,ZHANG H L,et al. Wettability of molten Sn on AlCoCrCuxFeNi high-entropy alloy[J]. Materials Chemistry and Physics,2017,199:1-6.
[27] EUSTATHOPOULOS N,NICHOLAS M G,DREVET B. Wettability at high temperatures[M]. Oxford:Elsevier,1999.
[28] LI C D,WANG X J,LIU W Q,et al. Microstructure and strengthening mechanism of carbon nanotubes rein-forced magnesium matrix composite[J]. Mater. Sci. Eng. A,2014,597(8):264-269.