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Process optimization for novel tungsten/metal gas suspended arc welding depositing iron base self-fluxing alloy coatings

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Abstract

A novel welding process, known as tungsten/metal gas suspended arc welding (T/M GSAW), was applied to deposit iron base self-fluxing alloy coating onto Q235 carbon steel. The depositing process parameters were designed optimally. Macrostructure, microstructure, and mechanical properties of the coating obtained with the optimized depositing process parameters were studied. The optimized set of the depositing process parameters, including depositing current 180 A, depositing speed 90 mm/min, and arc height 6 mm was achieved. The forming factor and the dilution rate of the coating with optimized process parameters were 3.49 and 2.35 %, respectively. The coating mainly included the fine equal axial grains at the top and the coarse cellular crystal at the bottom. And the typical microstructure of the coating was mainly composed of γ(Fe, Ni) and (Cr, Fe)7C3. The wear rate of the coating and the substrate were 4.63 × 10−5 and 20.17 × 10−5 mm3/Ns, respectively. So the coating appeared a mild wear with fine scratches, but Q235 steel showed a severe adhesion.

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Authors and Affiliations

  1. School of Material Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Yufeng Zhang, Jihua Huang, Zheng Ye, Zhi Cheng & Weiqiang Li

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  1. Yufeng Zhang
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  2. Jihua Huang
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  3. Zheng Ye
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  4. Zhi Cheng
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  5. Weiqiang Li
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Correspondence to Jihua Huang.

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Zhang, Y., Huang, J., Ye, Z. et al. Process optimization for novel tungsten/metal gas suspended arc welding depositing iron base self-fluxing alloy coatings. Int J Adv Manuf Technol 89, 2481–2489 (2017). https://doi.org/10.1007/s00170-016-9258-0

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  • DOI: https://doi.org/10.1007/s00170-016-9258-0

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