Microstructures and mechanical properties of YG18 cemented carbide/40Cr steel joints vacuum brazed using Ag–Cu–Ti filler metal

Zheng, Zhaoyang; Wang, Shaoheng; Xu, Minyun; Du, An; Ma, Ruina; Fan, Yongzhe; Zhao, Xue; Cao, Xiaoming

doi:10.1016/j.vacuum.2022.111323

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…Conversely, SEM images of the fracture with the interlayer show distinct YG20 steps, with the fracture mainly composed of Ag(s,s), Cu(s,s), TiC, and YG20. The extended fracture path from the braze seam to the base material indicates improved braze bonding performance with the addition of the HCF interlayer, aligning with previous reports 13,62 …”

Section: Resultssupporting

confidence: 89%

“…The extended fracture path from the braze seam to the base material indicates improved braze bonding performance with the addition of the HCF interlayer, aligning with previous reports. 13,62 The enhancement of the brazing seam can be explained by multiple synergistic effects of the core-sheath struc-ture. Specifically, reports indicate that introducing a 3D ceramic network reinforcement can effectively enhance the shear resistance of the braze seam.…”

Section: Strength Analysis Of Yg20/3cr13 Jointsmentioning

confidence: 99%

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An in situ 3D core–sheath interlayer utilized for reinforcing a WC–Co/3Cr13 brazed joint

Wang,

Li,

Yang

et al. 2024

J Am Ceram Soc.

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Large residual stress induced by significant difference in the coefficient of thermal expansion compromises the mechanical performance of a brazed joint between the WC–Co cemented carbide (YG20) and 3Cr13 stainless steel in a cutting tool of shield machine. In this study, a melamine formaldehyde foam precursor was utilized to produce a 3D hollow carbon foam (HCF) used as interlayer through a high‐temperature carbonization process to aid in the brazing process of YG20 and 3Cr13. First, the morphology and microstructure of the HCF interlayer were revealed as a defect‐rich carbon shell with a hollow structure. Afterward, the effects of introducing the as‐prepared HCF interlayer on the joint microstructure and shear performance were investigated. Results indicate that the HCF interlayer contributed to phase homogenization and, moreover, the residual stress relieving through in situ forming a core (metallic matrix)–sheath (ceramic shell) structure. This method outperformed the direct brazing approach without using an interlayer, with a 41% increase in the joint shear strength due to the synergistic strengthening mechanism of the HCF through residual stress reliving and joint seam toughening. Based on the results, in spite of the residual stress, the fast load transfer and the compensation from the matrix core to the ceramic sheath are responsible for the improved mechanical performance of the joint.

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Section: Resultssupporting

confidence: 89%

Section: Strength Analysis Of Yg20/3cr13 Jointsmentioning

confidence: 99%

An in situ 3D core–sheath interlayer utilized for reinforcing a WC–Co/3Cr13 brazed joint

Wang,

Li,

Yang

et al. 2024

J Am Ceram Soc.

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“…Due to the introduction of the newly added foam structure, Ag‐Cu eutectic was filled into Ni foam skeleton, the width of brazing layer expanded from 30 to 100 µm. Composite construction of solder played an important role in relieving the residual stress and improving the mechanical strength of the joint 41,42 . In addition, solder flowed to the foam pores, the Ag( S , S ) in the filler metal was more than that without foam.…”

Section: Resultsmentioning

confidence: 99%

“…Composite construction of solder played an important role in relieving the residual stress and improving the mechanical strength of the joint. 41,42 In addition, solder flowed to the foam pores, the Ag( S , S ) in the filler metal was more than that without foam. Ag mainly distributed in the foam pores, and the remaining part diffused into Cu base metal.…”

Section: Effect Of Ni Foam Thickness On Microstructure Of Aln/cu Jointsmentioning

confidence: 99%

Effect of Ni foam on the microstructure and properties of AlN ceramic/Cu brazed joint

Guo

Ding

et al. 2023

Int J Applied Ceramic Tech

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Aluminum nitride (AlN) ceramics and oxygen‐free Cu were brazed with multilayer filler consisted of Ag‐Cu‐Ti +Ni foam. The microstructure and forming principle of AlN/Cu joints were studied and the influence of Ni foam on the joints was focused. The result shows that the composition of AlN/Cu joint was AlN/TiN/Ni3Ti+Cu(s,s)+CuTi+Ni foam+Ag(s,s)/Cu. The joint strength was only 66.7 ± 3.7MPa with pure Ag‐Cu‐Ti solder and the fracture occurred inside AlN ceramics due to the residual stress. The foam nickel reacted with Ag‐Cu‐Ti filler metal to form Ni3Ti during brazing process. Ni foam still retained the basic skeleton structure during brazing, and the mechanical capacity of AlN/Cu joint was enhanced significantly. The maximum shear strength of the brazed joint can reach 89.6 ± 4.5 MPa with .1 mm Ni foam, and the fracture position changed to the brazing filler. The result shows that nickel foam can reduce the residual thermal stress, and the mechanical properties of AlN/Cu joints were improved.

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Study on the influence of surface nickel plating on the microstructure and mechanical properties of WC-8Co/Inconel 718 brazed joints

Qiao,

Qin,

Zhang

et al. 2024

J Mater Sci

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Microstructures and mechanical properties of YG18 cemented carbide/40Cr steel joints vacuum brazed using Ag–Cu–Ti filler metal

Cited by 15 publications

References 24 publications

An in situ 3D core–sheath interlayer utilized for reinforcing a WC–Co/3Cr13 brazed joint

An in situ 3D core–sheath interlayer utilized for reinforcing a WC–Co/3Cr13 brazed joint

Effect of Ni foam on the microstructure and properties of AlN ceramic/Cu brazed joint

Study on the influence of surface nickel plating on the microstructure and mechanical properties of WC-8Co/Inconel 718 brazed joints

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