Non-Ferrous Metal Systems. Part 3

Effenberg, G.; Ilyenko, S.

doi:10.1007/978-3-540-47004-5

Cited by 3 publications

(6 citation statements)

References 5 publications

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“…At point E, (Ag 72 Cu 28 ) is a special eutectic composition alloy, where all the elements in that alloy can melt completely in a very narrow temperature range, lower than any other composition containing greater or lesser amounts of either metals. [35][36][37][38][39] This will reduce the possibility of partial fastening resulting from insufficient heating. These behaviors apply to the cooling phenomena too.…”

Section: Brazing Filler Material Apparatus and Methodsmentioning

confidence: 99%

“…Liquation happens when the eutectic alloy melts and fills the gap while the non-eutectic elements have not yet started to melt. 35 Finally, the qualitative measure of the filler's ability to bond with a given base metal at brazing temperature is performed. The cooling process is done at a very slow rate inside a furnace.…”

Section: Brazing Filler Material Apparatus and Methodsmentioning

confidence: 99%

“…The design of the filler metal can be quite complex alloys, which are determined by the conditions needed. [32][33][34][35] The common filler alloys that have been used in brazing of carbides are typically silver, copper, nickel, zinc and some additional elements. In the filler alloy, each element adds unique properties so that the alloy works better than any of the individual elements.…”

Section: Introductionmentioning

confidence: 99%

“…Cadmium is also a very ductile, so it adds a softening effect to the braze alloy. 35 In brazing tungsten carbide to steel, three types of fillers are commonly used: silver and/or copper-based alloys, which is shown in Table 1. [35][36][37][38][39] High ductility of silver and copper makes them favorable as the filler metal.…”

Section: Introductionmentioning

confidence: 99%

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Dissimilar vacuum brazing of WC-Co and cold work steel utilizing a new near-eutectic silver-copper filler alloy

Sarhan

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Tungsten carbides are extremely high in hardness and they are wear-resistant materials. However, they are extremely brittle materials that render them ideal for many applications. Brazing technology has been proved to be a promising approach for joining tungsten carbide to tough metals to create high strength, tough and impact-resistant joint in the final assembly. In this research work, a dissimilar brazing of tungsten carbide (WC-Co) and cold work steel will be achieved using a new type of filler, a silver-copper near-eutectic alloy (BAg-8T) (Ag70Cu28Ti2). (BAg-8T) as a mixed alloy (eutectic and titanium) can melt/solidify completely in a very narrow temperature range (778 °C/800 °C), lower than any other existing brazing filler alloy; this will reduce the possibility of partial fastening while solidification. In addition, (BAg-8T) filler will act as the soft-iron gauze. Being soft and ductile metals, they will creep and absorb the movement due to differential contraction of the carbide and tool shank. Besides, they will improve the wetting on the carbide. In this research work, the effect of the joining parameters (brazing temperature and cobalt percentage in the tungsten carbide) on the mechanical properties and microstructure of the brazed joint will be investigated to determine the best joint performance.

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Section: Brazing Filler Material Apparatus and Methodsmentioning

confidence: 99%

Section: Brazing Filler Material Apparatus and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissimilar vacuum brazing of WC-Co and cold work steel utilizing a new near-eutectic silver-copper filler alloy

Sarhan

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Consequently, this higher value of tensile strength can be attributed to higher thickness of reaction layer, more spreading and less wetting angle for 321 stainless steel laser brazed joints. According to binary and ternary phase diagrams [27][28][29], formation of inter metallic compound is not seen in the reaction layer. Therefore, increasing this layer leads to stronger joints due to better inter diffusion.…”

Section: Mechanical Properties Of Laser Brazed Jointsmentioning

confidence: 99%

Comparative study on laser brazing of austenitic and martensitic stainless steels with silver-based filler metal

Khorram¹,

GHOREISHI²,

J.³

et al. 2016

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In the present study, laser brazing of austenitic stainless steel (type 321) and martensitic stainless steel (type 410) have been performed using 400 W pulsed Nd:YAG laser with silverbased filler metal. The microstructure was investigated using Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS). The laser brazed joints consist of α-Ag solid solution, α-Cu solid solution surrounded by the α-Ag solid solution and eutectic structure. Filler metal shows better spreading on 321 stainless steel because of more content of Ni and presence of Ti as an activator in the alloy. The average thickness of reaction layer is approximately 3.2 µm for 321 stainless steel and 2.2 µm for 410 stainless steel. The tensile strength of 321 stainless steel joints is higher than that of 410 stainless steel joints due to higher thickness of reaction layer, more spreading and smaller wetting angle. The average of micro hardness for joints in a seam is approximately 146 HV. K e y w o r d s : plaser brazing, 321 stainless steel, 410 stainless steel, silver-based filler metal,

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