Characteristics of dissimilar laser-brazed joints of isotropic graphite to WC–Co alloy

Nagatsuka, Kimiaki; Sechi, Yoshihisa; Miyamoto, Yoshinari; Nakata, Kohei

doi:10.1016/j.mseb.2011.12.014

Cited by 19 publications

(7 citation statements)

References 24 publications

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“…Nagatsuka et al [18] performed laser brazing for joining isotropic graphite to WC-Co alloy. An effect of Ti, serving as an activator in a eutectic Ag-Cu alloy filler metal, has been studied on the joint strength and the interface structure of the joint.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Khorram¹,

Ghoreishi²

2015

Optics & Laser Technology

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Section: Introductionmentioning

confidence: 99%

Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Khorram¹,

Ghoreishi²

2015

Optics & Laser Technology

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“…Brazing is a suitable process for joining dissimilar materials, especially those that cannot be easily joined by fusion welding, such as ceramics and metals. [1][2][3][4][5][6][7][8][9][10][11][12][13] Laser brazing, which is a novel brazing technique, uses laser beam irradiation to selectively heat a specific part of the components to be joined. Compared to conventional furnace brazing, laser brazing can potentially minimise material deterioration and excess growth of the brittle compound layer formed during brazing because the heating and cooling times in this process are short, and only the selected part of the components needs to be heated with a low heat input.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to conventional furnace brazing, laser brazing can potentially minimise material deterioration and excess growth of the brittle compound layer formed during brazing because the heating and cooling times in this process are short, and only the selected part of the components needs to be heated with a low heat input. [11][12][13][14][15] Sialon is an engineering ceramics comprising mostly Si 3 N 4 . It has several functional characteristics such as high strength, high hardness, high resistance to corrosion and wear, and low thermal expansion.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is limited information on the effect of the active element content on the dissimilar brazing of short heating durations, such as laser brazing. [11][12][13] Based on this information, the objective of this study was to determine the effect of Ti (as an active element in the filler metal of a dissimilar laser-brazed joint of sialon to the WC-Co alloy) on the interface structure and strength of the joint; the WC-Co alloy was selected as a counter material owing to its low thermal expansion coefficient and relatively high heat resistance.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ti content in Ag–Cu–Ti activated filler metal on dissimilar joint formation of sialon and WC–Co alloy by laser brazing

Nagatsuka

Shoji

Sechi

et al. 2014

Science and Technology of Welding and Joining

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Laser brazing was carried out for dissimilar joining of sialon and a WC-Co alloy. Eutectic type Ag-Cu alloys as filler metals with different Ti content ranging from 0 to 2?8 mass-% were used to investigate the effects of Ti on the interface structure and strength of the joint. The filler metal sheet was sandwiched between a sialon block and a WC-Co alloy plate, and a laser beam was irradiated selectively on the WC-Co alloy plate. The brazed joint was obtained using the filler metal containing .0?3 mass-%Ti. TiN, Ti 5 Si 3 , and Cu 4 Ti layers were formed at the interface of sialon and brazed metal as compound layers. The shear strength of the brazed joint increased with increasing Ti content in the filler metal in the range 0?3-1?7 mass-%, reaching a maximum value of 106 MPa. However, the strength decreased when the Ti content became higher than 1?7 mass-%.

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“…A disk laser, CO 2 laser, Nd/YAG laser, laser diode (LD) laser, and fiber laser were selected as heat sources. The laser-brazing method can be used for poor-weldability materials (such as graphite [77]).…”

mentioning

confidence: 99%

Dissimilar Welding and Joining of Cemented Carbides

Wang

Chen

et al. 2019

Metals

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Cemented carbides have been widely used in aerospace, biomedical/wearable sensor, automobile, microelectronic, and other manufacturing industries owing to their superior physical and chemical properties at elevated temperatures. These superior properties, however, make it difficult to process these materials using conventional manufacturing methods. In this article, an overview of the welding and joining processes of cemented carbide and steel is given, followed by a few examples of welding processes. Cemented carbides can be successfully joined by sinter-bonding, brazing and soldering, laser beam welding, tungsten inert gas (TIG) welding, diffusion welding, friction welding, electron-beam welding, and chemical vapor deposition. An overview of the benefits and drawbacks of brazing and soldering of cemented carbide and steel is presented, including reports on joint design, processes, and selection of brazing filler metals. The laser welding of cemented carbide and steel is addressed and reviewed, including reports on gap bridging ability, the inclusion/absence of filler metals, interlayers, and laser/TIG hybrid welding. Finally, a section is devoted to explaining the main issues remaining in the welding and joining of cemented carbide, corresponding solutions, and future work required.

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Characteristics of dissimilar laser-brazed joints of isotropic graphite to WC–Co alloy

Cited by 19 publications

References 24 publications

Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Comparative study on laser brazing and furnace brazing of Inconel 718 alloys with silver based filler metal

Effect of Ti content in Ag–Cu–Ti activated filler metal on dissimilar joint formation of sialon and WC–Co alloy by laser brazing

Dissimilar Welding and Joining of Cemented Carbides

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