Influence of tin on the structure and hardness of metallic binders of diamond tools fabricated by composition brazing

Sokolov, E. G.

doi:10.3103/s1067821216060146

Cited by 8 publications

(10 citation statements)

References 3 publications

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“…2 is 2-5 μm, with the initial particle size of cobalt powder being 1-2 μm. This happens due to the dissolution process of small cobalt particles by the liquid phase and its subsequent deposition into larger particles [8,[11][12][13].…”

Section: Resultsmentioning

confidence: 99%

“…shaped stone-working rollers, by compaction in molds. For fabrication of such tools, composite soldering can be used [7][8][9]. Its essence is as follows.…”

Section: Introductionmentioning

confidence: 99%

“…The distinctions consist in the compacts having a much lower density and the powdered material containing quite a lot of easily fusible constituent (amounting up to 65-73 % vol.) in the case of composition soldering [8,9]. This method even allows forming up to 3-mm-thick diamond coatings on complex-shaped tools.…”

Section: Introductionmentioning

confidence: 99%

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Structure Formation during Liquid-Phase Sintering of the Diamond-Containing Composites with Sn-Cu-Co-W Binders

Sokolov

2018

SSP

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Structure formation of diamond-containing composites with Sn-Cu-Co-W binders has been studied within the range of sintering temperatures of 780–820°C. The specimens were obtained by rolling the paste-like mixtures of metallic powders and diamonds on steel substrates, with sintering performed in vacuum. The structure of the sintered specimens was studied by optical metallography, X-ray diffractometry and electron probe microanalysis. Hardness of the materials was identified by Rockwell method (scale B). It has been found that the process of composites sintering is largely affected by oxide films available on the surface of the powders. In order to obtain composites having less than 10% porosity and up to 96–98 HRB hardness, they have to be sintered at the temperature of 820°C which eliminates the oxide films.

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Section: Resultsmentioning

confidence: 99%

“…shaped stone-working rollers, by compaction in molds. For fabrication of such tools, composite soldering can be used [7][8][9]. Its essence is as follows.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure Formation during Liquid-Phase Sintering of the Diamond-Containing Composites with Sn-Cu-Co-W Binders

Sokolov

2018

SSP

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“…To this effect, they used the heat-balance equation of bottomhole operation of a drill bit. N. N. Zakirov found that the maximum temperature in the friction assemblies of a drill bit may reach 380 °С [8]. These studies show that the heating temperature of drill bits rises with the increasing temperature of the flush fluid, with the higher intensity of friction and with the decreasing thermal conductivity of metal.…”

Section: Introductionmentioning

confidence: 87%

“…The rapid advancement in this industry has become possible due to the fact that the cost of synthetic diamonds was significantly reduced and the tools became more accessible. Along with the advancement in technologies used for the synthesis of superhard materials, there are two other trends: the composition of these materials is also improved and the novel methods for manufacturing metallic binders, which are in charge of diamond retention in the working layer and of the high performance maintenance, are being developed [6][7][8][9]. The standard use of single-component metallic [10,11] and multi-component binders produced by chemical co-deposition from metal hydroxides and further reduction [12] has given way to the modern technique of mechanical alloying (MA) of powder blends [13,14].…”

Section: Introductionmentioning

confidence: 99%