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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

Published online by Cambridge University Press:  08 May 2018

Xiangzhao Zhang ,
Zhikun Huang ,
Guiwu Liu ,
Tingting Wang ,
Jian Yang ,
Haicheng Shao  and
Guanjun Qiao
Xiangzhao Zhang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Zhikun Huang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Guiwu Liu*
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Tingting Wang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Jian Yang
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Haicheng Shao
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Guanjun Qiao*
Affiliation:
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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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.

Keywords

coatingbrazingmicrostructures
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 11 , 13 June 2018 , pp. 1671 - 1680
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Copyright
Copyright © Materials Research Society 2018 

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