Transfer Welding Process and Microstructure and Properties of Titanium/Steel Clad Pipe

Abstract:

Titanium/steel clad material with excellent mechanical properties and corrosion resistance has important application in the oil, gas and ocean equipment. Due to the metallurgical incompatibility of titanium and steel, the mechanical properties of weld joint would completely lose when the brittle intermetallic phase existed in the fusion welding process. Therefore, the gas tungsten arced welding (TIG) + metal inert-gas welding (MIG) + metal active-gas welding (MAG) with pure vanadium and pure copper composite filler metals for welding connection experiment in this study was carried out on Ø610mm×(14+2)mm TA1/X65 titanium/steel clad pipe fitting (titanium cladding with thickness 2 mm, X65 pipeline steel with thickness 14 mm). The microstructure, interface element distribution, main phase, microhardness distribution on cross section and mechanical properties of butt welds were researched by using OM, XRD, EDS element mapping, microhardness and tensile tests. The result showed that the use of pure vanadium and pure copper composite filler metals for welding connection could effectively avoid the production of intermetallic compounds in the process of titanium/steel composite pipe fusion welding. The deposited metal of titanium, vanadium, copper and steel had obvious zoning, the inter-diffusion melting phenomenon was not severe, which is by using solid solution phases to transit zonings of deposited metal. The microstructure of titanium and vanadium transition interface were composed of titanium-based solid solution, the microstructure of vanadium and copper transition interface was composed of vanadium-based solid solution, and the microstructure of copper and steel transition interface were composed of copper-based solid solution. The transition interface had no porosity, crack and other defects. The tensile strength of the weld was 546MPa, which is mainly contributed by the carbon steel layer. With pure vanadium and pure copper as transition filler metal for the welding connection TA1/X65 clad pipe was successfully realized by TIG+MIG+MAG welding method, and the strength index reached the desired effect.

• Periodical: Materials Science Forum (Volume 913)
• Pages: 340-348
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.913.340
• Online since: February 2018
• Authors: Zong Yue Bi, Jun Yang*
• Keywords: Intermetallic Compounds, TA1/X65 Clad Pipe, Vanadium/Copper Composite Transition, Welding

References

[1] X.Y. Zhang, Y.Q. Zhao, C.G. Bai, Titanium alloys and their applications, Chemical Industry Press, Beijing, (2005).

[2] X.J. Yuan, G. M. Sheng, B. Qin, Impulse pressuring diffusion bonding of titanium alloy to stainless steel, Materials Characterization. 59 (2008) 930-936.

DOI: 10.1016/j.matchar.2007.08.003

[3] G.Q. Li, TIG welding for small diameter TA2 titanium tube, Welded Pipe and Tube. (2011) 39-41.

[4] G.Z. Xu, Welding between stainless steel and titanium alloy different diameter transfer tube, Welded Pipe and Tube. (2009) 70-72.

[5] K. Yang, Y.J. Wang, H.T. Yun, Y. Bai, L. Fu, Simulation and analysis on longitudinal TIG welding of TC4 titanium alloy thin-walled circular tube, Welded Pipe and Tube. (2015) 6-10.

[6] P.J. Modenesi, E.R. Apolinario, I.M. Pereira, TIG welding with single-component fluxes, Journal of Materials Processing Technology. 99 (2000) 260-265.

DOI: 10.1016/s0924-0136(99)00435-5

[7] P. Li, J.L. Long, J.T. Xiong, F.S. Zhang, Structure and properties of diffusion bonded TA2 to 1Cr18Ni9Ti joints with Ni + Nb composite interlayer, Journal of Aeronautical Materials. 30 (2010) 25-29.

[8] P. Liu, M. Lu, X.W. Ji, Q. Huang, R.X. Dai, Minimum charge thickness of titanium/steel composite plates in explosive welding, Ordnance Material Science and Engineering. 34 (2011) 14-17.

[9] Y. Suzaki, C. Ohkubo, M. Abe, Titanium removable partial denture clasp repair using laser welding: a clinical report, J Prosthet Dent. 91 (2004) 418-424.

DOI: 10.1016/j.prosdent.2004.01.019

[10] M. Aslan, S. Adin, T. Eran, K. Sergey, H. Zvi, F. Nachum, Titanium to steel joining by spark plasma sintering (sps) technology, Journal of Materials Processing Technology. 213 (2013) 161-166.

DOI: 10.1016/j.jmatprotec.2012.09.017

[11] J. Yang, Z.Y. Bi, H. Niu, H.Z. Liu, W.P. Zhang, L. Tian, X.J. Huang, C. Zhang, Research on welding process, microstructure and mechanical property of TA1/X65 clad plates, Welded Pipe and Tube. 38 (2015) 1-10.

[12] C.G. Li, H.Z. Fu, Q. Yu, Aerospace Materials, National Defend Industy Press, Beijing, (2002).

[13] B. Qin, G.M. Sheng, J.W. Huang, B. Zhou, S.Y. Qiu, C. Li, Phase transformation diffusion bonding of titanium alloy with stainless steel, Mat Charact, 56 (2006) 32-38.

DOI: 10.1016/j.matchar.2005.09.015

[14] L.Q. Han, Z.D. Wang, B. Long, G.B. Lin, H. Zhang, J.S. Qiao, Formation kinetics of interfacial intermetallic compounds of TA2/316L welding joints, Transactions of Materials and Heat Treatment, 32 (2011) 61-67.

[15] G.B. Kale, R.V. Patil, P.S. Gawade, Interdiffusion studies in titanium-304 stainless steel system, Journal of Nuclear Materials, 257 (1998) 44-50.

DOI: 10.1016/s0022-3115(98)00179-2

[16] T. Wang, B.G. Zhang, G.Q. Chen, J.C. Feng, Q. Tang, Electron beam welding of Ti-15-3 titanium alloy to 304 stainless steel with copper interlayer sheet, Transactions of Nonferrous Metals Society of China, 20 (2010) 1829-1834.

DOI: 10.1016/s1003-6326(09)60381-2

[17] T. Wang, B.G. Zhang, G.Q. Chen, J.C. Feng, Influence of vanadium element on microstructure of electron beam welded titanium alloy to stainless steel joint, Rare Metal Materials and Engineering, 40 (2011) 049-053.

[18] S. Kundu, M. Ghosh, A. Laik, K. Bhanumurthy, G.B. Kale, S. Ghatterjee, Diffusion bonding of commercially pure titanium to 304 stainless steel using copper interlayer, Mater Sci Eng A, 407 (2005) 154-160.

DOI: 10.1016/j.msea.2005.07.010

[19] D.Y. Liu, C. Zhou, L.J. Cong, S.C. Liu, Microstructure and mechanical properties of diffusion bonded joints between titanium and low carbon steel with copper interlayer, Trans Mater Heat Treat, 33 (2012) 105-109.

[20] S. Sam, S. Kundu, S. Chatterjee, Diffusion bonding of titanium alloy to micro-duplex stainless steel using a nickel alloy interlater: Interface microstructure and strength properties, Materials and Design, 40 (2012) 237-244.

DOI: 10.1016/j.matdes.2012.02.058

[21] Y. Zhou, G.J. Yang, X. Wu, C.J. Li, Formation characteristics of Ni/Ti intermetallics through annealing of layered Ni/Ti, Transactions of the China Welding Institution, 31 (2010) 41-44.

[22] R.X. Luo, Z.X. Li, Research on Ti/Ni Diffusion Welding Process, Casting Forging Welding, 37 (2008) 58-60.

[23] S. Kundu, S. Chatterjee, Characterization of diffusion bonded joint between titanium and 304 stainless steel using a Ni interlyer, Mat Charact, 59 (2008) 631-637.

DOI: 10.1016/j.matchar.2007.05.015

[24] A. Elrefaey, W. Tillmann, Solid state diffusion bonding of titanium to steel using a copper base alloy as interlayer, J Mat Process Tech, 209 (2009) 46-52.

DOI: 10.1016/j.jmatprotec.2008.06.014

[25] T. Wang, B.G. Zhang, G.Q. Chen, J.C. Feng, High strength electron beam welded titanium-stainless steel joint with V/Cu based composite filler metals, Vacuum, 94 (2013) 41-47.

DOI: 10.1016/j.vacuum.2013.01.015

[26] Q.W. Guo, G.S. Wang, G.C. Guo, Common nonferrous metal binary alloy phase portfolio, Chemical industry press, Beijing, (2010).