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Wetting and brazing of Ni-coated WC-8Co cemented carbide using the Cu-19Ni-5Al alloy as the filler metal: Microstructural evolution and joint mechanical properties

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Abstract

The wetting of Cu-19Ni-5Al alloy on Ni-coated WC-8Co substrates with different coating thicknesses was investigated, and the brazing of Ni-coated WC-8Co to SAE1045 steel was performed by using the Cu-19Ni-5Al alloy as the filler metal. All the Cu-19Ni-5Al/Ni-coated WC-8Co systems present excellent wettability with a final contact angle of ∼10°. The thicknesses of the β + γ phase enriched with Co, Ni, and Al at the two joint interfaces increase and decrease with the Ni coating thickness, brazing temperature, and holding time increasing, respectively. The joint shear strength increases first and then decreases with the increase of Ni coating thickness, brazing temperature, or holding time. The maximum joint shear strength of ∼328 MPa is obtained while Ni plating for 90 min and brazing at 1210 °C × 5 min.

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ACKNOWLEDGMENTS

This work was supported by the National Natural Science Foundation of China (51572112); the Natural Science Foundation of Jiangsu Province (BK20151340); the Six Talent Peaks Project of Jiangsu Province (2014-XCL-002, TD-XCL-004); the 333 talents project of Jiangsu province (BRA2017387); and the Innovation/Entrepreneurship Program of Jiangsu Province ([2015]26) and the Qing Lan Project ([2016]15).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Xiangzhao Zhang, Zhikun Huang, Guiwu Liu, Tingting Wang, Jian Yang, Haicheng Shao & Guanjun Qiao

  2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

    Guanjun Qiao

Authors
  1. Xiangzhao Zhang
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  2. Zhikun Huang
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  3. Guiwu Liu
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  4. Tingting Wang
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  5. Jian Yang
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  6. Haicheng Shao
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  7. Guanjun Qiao
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Correspondence to Guiwu Liu or Guanjun Qiao.

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Supporting Information: Wetting and brazing of Ni-coated WC-8Co cemented carbide using Cu-19Ni-5Al alloy as filler metal: Microstructural evolution and joint mechanical properties (approximately 34 KB)

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Zhang, X., Huang, Z., Liu, G. et al. Wetting and brazing of Ni-coated WC-8Co cemented carbide using the Cu-19Ni-5Al alloy as the filler metal: Microstructural evolution and joint mechanical properties. Journal of Materials Research 33, 1671–1680 (2018). https://doi.org/10.1557/jmr.2018.101

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  • DOI: https://doi.org/10.1557/jmr.2018.101

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