Micro-Brazing of Stainless Steel Using Ni-P Alloy Plating

Liu, Shubin; Shohji, Ikuo; Iioka, Makoto; Hashimoto, Anna; Hirohashi, Junichiro; Wake, Tsunehito; Arai, Shigeo

doi:10.3390/app9061094

Cited by 7 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shear strength of the brazed joints is shown in Table 4 . In addition, the shear strength of joints brazed with the electrodeposited Ni-11P alloy coating obtained in our previous study [ 20 ] is also presented in Table 4 for comparison. The shear strength of joint brazed with the electrodeposited Ni-13.4Cr-11.6P alloy coating is 59.0 MPa, which is higher than that of joint brazed with the electrodeposited Ni-11P alloy coating.…”

Section: Resultsmentioning

confidence: 99%

“…Considering production costs, electrodeposition is undoubtedly a good choice. According to our previous study [ 20 ], the electroplating method was used to deposit a Ni-P alloy coating with certain chemical composition and thickness on the surface of stainless steel, and the brazing of stainless steel with the electrodeposited Ni-P alloy coating was successfully realized. In order to meet the application of heat exchangers in the high temperature field (i.e., 500–1000 °C), a novel Ni-Cr-P plating bath was developed and a Ni-13.4Cr-11.6P (mass%) alloy coating with similar chemical composition to BNi-7 filler was successfully prepared on the surface of SUS304 plate [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…Shear strength of joints brazed with electrodeposited Ni-13.4Cr-11.6P alloy coating and electrodeposited Ni-11P alloy coating[20].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this study, an amorphous Ni-13.4Cr-11.6P (mass%) alloy coating with a thickness of 30 μm was deposited on the surface of SUS304 stainless steel as a brazing filler metal to conduct brazing. The differential thermal analysis measurements indicate that the electrodeposited Ni-13.4Cr-11.6P alloy has a melting point of approximately 892 °C, which is almost consistent with that of the commercial BNi-7 filler metal. The microstructure, shear strength, and fracture mode of the brazed joint were investigated using an electron probe X-ray microanalyzer, a scanning electron microscope, an optical microscope, and a universal testing machine. The results showed that the brazed filler metal is filled between the SUS304 stainless steel plates without any flaws in the brazed seam. The P-containing phases, i.e., the Cr-P rich phase and the (Ni,Fe)3P phase, were formed in the brazed seam. The shear strength of the brazed joint obtained in this study is 59.0 MPa. The fracture occurs in the brazed filler zone, where the brittle P-containing phases are present. Galvanic current measurement results showed that the brazed Ni-13.4Cr-11.6P alloy coating has a better corrosion resistance than that of the brazed Ni-11P alloy coating, which can be attributed to the formation of a large amount of Ni-Fe solid solution and Cr-P rich phase in the top layer of the brazed Ni-13.4Cr-11.6P alloy coating.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…3 Effect of H3PO3 concentration on P content Fig. 4 Relationship between thickness of in Ni-P film and film thickness [7].…”

Section: Resultsmentioning

confidence: 99%

“…We have developed new technology to use electrolytic Ni-P plating film as brazing filler metal of stainless steel [7]. For the chemical composition of the Ni-P film, Ni-11P (mass%) was selected.…”

Section: Introductionmentioning

confidence: 99%

Brazing of Stainless Steel Using Electrolytic Ni-P Plating Film and Investigation of Corrosion Behavior

Hashimoto

Liu

Shohji

et al. 2021

MSF

Self Cite

View full text Add to dashboard Cite

Electrodeposited Ni-11 mass%P alloy plating film was fabricated on the surface of stainless steel SUS304 to conduct brazing of SUS304 plates for a heat exchanger. Brazing of SUS304 plates with electrodeposited Ni-11P layers was carried out using a hydrogen reducing furnace. The microstructure and joint strength of the brazed joint were also investigated. From the result of the microstructural observation of the cross section of the joint, it was found that the brazing filler metal is homogeneously distributed without defects such as voids between the SUS304 plates. The results of electrochemical measurements showed that the P-concentrated phase in the Ni-11P alloy is preferentially dissolved in NaCl aqueous solution.

show abstract

Effects of Cu Coating Addition on Mechanical Properties of Vacuum Brazed Joints

Wang,

Li,

Wei

et al. 2024

steel research int.

View full text Add to dashboard Cite

In this study, a copper brazing filler metal coating is fabricated on a 304 stainless steel (304SS) substrate using an electroplating technique. The effect of using electroplated copper brazing filler metal coatings compared to pure copper foil of the same thickness for vacuum brazing of stainless steel joints is investigated. The microstructure and microhardness of the brazed joints are characterized using X‐ray diffraction (XRD), scanning electron microscopy (SEM), and a Vickers hardness tester. The shear strength of the brazed joints is measured using an INSTRON 5869 universal testing machine. The results indicate that the electroplated Cu coating is dense, predominantly with a single cubic phase, with a few copper particles aggregating on the surface. Under electroplating conditions of 20 mA cm−2 for 1 h, the coating thickness was 56 μm. The shear strength of the brazed joint with this coating reached a maximum of 333.7 MPa, which is higher than that of a brazed joint with a 60 μm thick copper foil, which exhibits a shear strength of 303.2 MPa. The shear strength of the brazed joints shows an initial increase followed by a decrease as current density and electroplating time increase. This study provides significant technical support for brazing complex shapes or precision components. It suggests a method to simplify the brazing process, reduce production costs, and enhance the strength of brazed joints.

show abstract

Micro-Brazing of Stainless Steel Using Ni-P Alloy Plating

Cited by 7 publications

References 15 publications

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

Brazing of Stainless Steel Using Electrolytic Ni-P Plating Film and Investigation of Corrosion Behavior

Effects of Cu Coating Addition on Mechanical Properties of Vacuum Brazed Joints

Contact Info

Product

Resources

About