Al-Mg焊丝的Ti6Al4V/5A05Al熔钎焊接接头的组织性能
|
摘要
为实现Ti/Al熔钎焊接头组织性能的优化,采用Al-Mg焊丝进行Ti6Al4V/5A05Al异种金属的熔化极氩弧熔钎焊。采用X射线衍射(XRD)、扫描电镜(SEM)、能谱仪(EDS)等对Ti/Al界面组织结构和接头断口形貌进行了分析,采用万能力学试验机对接头的抗拉强度进行了测试。结果表明,采用Al-Mg焊丝配合合适的焊接工艺可实现钛与铝的可靠焊接,钛与焊缝之间通过形成一层厚度1～5μm的芽状TiAl_3反应层实现良好的钎焊结合;Ti/Al界面附近未发现未焊透、裂纹等微观缺陷。拉伸测试中大多数接头断裂于铝侧焊接热影响区中,接头最高抗拉强度达243 MPa。与Al-Si焊丝相比,采用Al-Mg焊丝时Ti/Al熔钎焊接头的抗拉强度获得了显著提高。
In order to optimize the microstructure and properties of Ti/Al dissimilar joint, Al-Mg wire was used to gas metal arc welding-brazing Ti6Al4V/5A05 Al dissimilar metals. Microstructure and fracture morphology of the joint was analyzed using X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy disperse spectrometer(EDS) analysis. The tensile strength of the joint was tested by universal mechanical testing machine. The results show that the reliable welding between Ti6Al4 V alloy and 5A05 Al alloy can be realized by using Al-Mg wire and proper welding process, and a good brazing bonding between Ti6Al4 V alloy and weld seam is realized by forming a sprout TiAl_3 reaction layer with thickness of 1-5 μm, and no welding defects such as lack of penetration and welding cracks are found near the Ti/Al interface. During tensile test, most of the joints break in the heat-affected zone of aluminum side welding, and the maximum tensile strength of the joint is up to 243 MPa. Compared with the Al-Si wire, the tensile strength of the Ti/Al brazed joint weld using Al-Mg wire is improved significantly.
In order to optimize the microstructure and properties of Ti/Al dissimilar joint, Al-Mg wire was used to gas metal arc welding-brazing Ti6Al4V/5A05 Al dissimilar metals. Microstructure and fracture morphology of the joint was analyzed using X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy disperse spectrometer(EDS) analysis. The tensile strength of the joint was tested by universal mechanical testing machine. The results show that the reliable welding between Ti6Al4 V alloy and 5A05 Al alloy can be realized by using Al-Mg wire and proper welding process, and a good brazing bonding between Ti6Al4 V alloy and weld seam is realized by forming a sprout TiAl_3 reaction layer with thickness of 1-5 μm, and no welding defects such as lack of penetration and welding cracks are found near the Ti/Al interface. During tensile test, most of the joints break in the heat-affected zone of aluminum side welding, and the maximum tensile strength of the joint is up to 243 MPa. Compared with the Al-Si wire, the tensile strength of the Ti/Al brazed joint weld using Al-Mg wire is improved significantly.
引文
[1] Majumasr B,Galun R,Weisheit A,et al.Formation of a crack-free joint between Ti alloy and Al alloy by using a high-power CO2 laser[J].Journal of Materials Science,1997,32(23):6191-6200.
[2] Wei S Z,Li Y J,Wang J,et al.Research on cracking initiation and propagation near Ti/Al interface during TIG welding of titanium to aluminium[J].Kovove Mater-Metallic Materials,2014,52(2):85-91.
[3] M?ller F,Grden M,Thomy C,et al.Combined laser beam welding and brazing process for aluminum titanium hybrid structures[J].Physics Procedia,2011,12:215-223.
[4] Chen S H,Li L Q,Chen Y B,et al.Joining mechanism of Ti/Al dissimilar alloys during laser welding-brazing process[J].Journal of Alloys and Compounds,2011,509(3):891-898.
[5] Miao Y G,Ma Z W,Yang X S,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 Technology,2018,260:104-111.
[6] Wang H D,Yuan X J,Li T,et al.TIG welding-brazing of Ti6Al4V and Al5052 in overlap configuration with assistance of zinc foil[J].Journal of Materials Processing Technology,2018,251:26-36.
[7] Wei S Z,Li Y J,Wang J,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(5/8):1137-1142.
[8] Lv S X,Jing X J,Huang Y X,et al.Investigation on TIG arc welding-brazing of Ti/Al dissimilar alloys with Al based fillers[J].Science and Technology of Welding and Joining,2012,17(7):519-524.
[9] Chen S H,Li L Q,Chen Y B,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):64-70.
[10] Wei S Z,Li Y J,Wang J,et al.Improving of interfacial microstructure of Ti/Al joint during GTA welding by adopting pulsed current[J].International Journal of Advanced Manufacturing Technology,2014,73(9/12):1307-1312.
[11] Ma Z P,Wang C W,Yu H C,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,2013,45:72-79.
[12] Rao A S,Reddy G M,Prasad K S.Microstructure and tensile properties of dissimilar metal gas tungsten arc welding of aluminium to titanium alloy[J].Materials Science and Technology,2011,27(1):65-70.
[13] Tomashchuk I,Sallamand P,Méasson A,et al.Aluminum to titanium laser welding-brazing in V-shaped groove[J].Journal of Materials Processing Technology,2017,245:24-36.
[14] Chen S H,Li L Q,Chen Y B,et al.Improving interfacial reaction non-homogeneity during laser welding-brazing aluminum to titanium[J].Materials and Design,2011,32:4408-4416.
[15] Wei S Z,Li Y J,Wang J,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):1451-1457.Microstructure and properties of Ti6Al4V/5A05Al welded-brazed joint using Al-Mg filler WEI Shou-zheng, WANG Zhi-ying, RAO Wen-ji, LI Zhi-yong, ZHANG Ying-qiao(149)Resistance spot welding of aluminum alloy/steel via an insert WANG Nan-nan, QIU Ran-feng, SHI Hong-xin(155)Code Number: ISSN 1009-6264 CN 11- 4545/TG CODEN:CRXAAK Annual Rate: 600 USD (including postage by air)
[2] Wei S Z,Li Y J,Wang J,et al.Research on cracking initiation and propagation near Ti/Al interface during TIG welding of titanium to aluminium[J].Kovove Mater-Metallic Materials,2014,52(2):85-91.
[3] M?ller F,Grden M,Thomy C,et al.Combined laser beam welding and brazing process for aluminum titanium hybrid structures[J].Physics Procedia,2011,12:215-223.
[4] Chen S H,Li L Q,Chen Y B,et al.Joining mechanism of Ti/Al dissimilar alloys during laser welding-brazing process[J].Journal of Alloys and Compounds,2011,509(3):891-898.
[5] Miao Y G,Ma Z W,Yang X S,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 Technology,2018,260:104-111.
[6] Wang H D,Yuan X J,Li T,et al.TIG welding-brazing of Ti6Al4V and Al5052 in overlap configuration with assistance of zinc foil[J].Journal of Materials Processing Technology,2018,251:26-36.
[7] Wei S Z,Li Y J,Wang J,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(5/8):1137-1142.
[8] Lv S X,Jing X J,Huang Y X,et al.Investigation on TIG arc welding-brazing of Ti/Al dissimilar alloys with Al based fillers[J].Science and Technology of Welding and Joining,2012,17(7):519-524.
[9] Chen S H,Li L Q,Chen Y B,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):64-70.
[10] Wei S Z,Li Y J,Wang J,et al.Improving of interfacial microstructure of Ti/Al joint during GTA welding by adopting pulsed current[J].International Journal of Advanced Manufacturing Technology,2014,73(9/12):1307-1312.
[11] Ma Z P,Wang C W,Yu H C,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,2013,45:72-79.
[12] Rao A S,Reddy G M,Prasad K S.Microstructure and tensile properties of dissimilar metal gas tungsten arc welding of aluminium to titanium alloy[J].Materials Science and Technology,2011,27(1):65-70.
[13] Tomashchuk I,Sallamand P,Méasson A,et al.Aluminum to titanium laser welding-brazing in V-shaped groove[J].Journal of Materials Processing Technology,2017,245:24-36.
[14] Chen S H,Li L Q,Chen Y B,et al.Improving interfacial reaction non-homogeneity during laser welding-brazing aluminum to titanium[J].Materials and Design,2011,32:4408-4416.
[15] Wei S Z,Li Y J,Wang J,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):1451-1457.Microstructure and properties of Ti6Al4V/5A05Al welded-brazed joint using Al-Mg filler WEI Shou-zheng, WANG Zhi-ying, RAO Wen-ji, LI Zhi-yong, ZHANG Ying-qiao(149)Resistance spot welding of aluminum alloy/steel via an insert WANG Nan-nan, QIU Ran-feng, SHI Hong-xin(155)Code Number: ISSN 1009-6264 CN 11- 4545/TG CODEN:CRXAAK Annual Rate: 600 USD (including postage by air)