A modern representation of the behaviour of electrospark alloying of steel by hard alloy

Ribalko, Alexander V.; Şahin, O.

doi:10.1016/j.surfcoat.2006.02.044

Cited by 34 publications

(17 citation statements)

References 1 publication

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“…This untransferred material is called the "erosion products". Thus the balance between the anode mass change Δm a and the cathode mass change Δm c is broken, and The coefficient k for the electrode pair "WC-8%Co-steel" differs and has been found to be equal to 0.5-0.75 [3] or 0.1-0.3 [21]. In our case, the mass transfer coefficient lies in the range from 0.05 to 0.4.…”

Section: Mass Transfermentioning

confidence: 61%

“…The amount of anode material transferred to a substrate is an important characteristic because it determines the thickness of a deposited coating [3,21]. The mass changes of the cathode and granules during the EGD processing are shown in Fig.…”

Section: Mass Transfermentioning

confidence: 99%

“…After the EGD process, during the initial 10 s when a small amount of pulse was passed, it was noticed that a single big spot and multiple minor spots around it often formed on the cathode surface. It is well known that the diameter of the erosion crater depends on the discharge energy [3]. Thus a main discharge with high power and several discharges with lower power through neighboring granules had developed at the same time.…”

Section: Characteristics Of Erosion Cratersmentioning

confidence: 99%

“…The object of this paper was to investigate the influence of the WC-8%Co granule size on the mass transfer, structure, wear resistance, and microhardness of coatings deposited on steel 1035. The hard alloy WC-8%Co was chosen as the electrode material because it is one of the most popular electrode materials for strengthening coatings [3,5,16,17,18]. …”

mentioning

confidence: 99%

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Formation of WC–Co coating by a novel technique of electrospark granules deposition

Бурков

Pyachin

2015

Materials & Design

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Section: Mass Transfermentioning

confidence: 61%

Section: Mass Transfermentioning

confidence: 99%

Section: Characteristics Of Erosion Cratersmentioning

confidence: 99%

mentioning

confidence: 99%

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Formation of WC–Co coating by a novel technique of electrospark granules deposition

Бурков

Pyachin

2015

Materials & Design

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“…В целом, привес катода при использовании FeWMoCrCB материалов был достаточно высоким, например, он был более чем в два раза выше, по сравнению с осаждением твердого сплава ВК10, при аналогичных режимах [16]. Изучение кинетики изменения масс электродов при ЭИЛ позволяет оценить эффективность массопе-реноса с анода на катод [17]. Для этого, исходя из экс-периментальных данных о привесе катода Δm с и эрозии анода Δm a , определяют коэффициент массопереноса К m = Δm c / |Δm a |, графики изменения которого в процес-се осаждения покрытий C1 и C2 показаны на рис.…”

Section: результаты и обсуждениеunclassified

Development and study of FeWMoCrBC metallic glass coatings synthesized by electrospark deposition

Бурков¹,

Pyachin²,

Zaytsev³

et al. 2016

LoM

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The paper is devoted to studying the possibility of creating an amorphous state in the metallic materials in the electrospark action process. Produced by powder metallurgy FeWMoCrBC crystalline alloys of two different compositions that were used as anodes for the coating onto the steel 1035 substrate by electrospark deposition technology. Study of mass transfer kinetics during the deposition of both compositions showed relatively high values of gain cathodes. Thus, the maximum mass transfer efficiency achieved using an electrode with a high iron content due to better adhesion to the steel substrate. It is found that by coating had a thickness of about 40 microns and had the metallic glasses structure from XRD data. Based on the results of differential scanning calorimetry revealed that recrystallization of the coating material occurred at annealing temperature exceeding 814 -825°C. XRD data of the samples after annealing at 1200°C showed that the amorphous structure is crystallized into carbides iron, tungsten and boron; borides iron, molybdenum and tungsten; as well as is observed metallic chromium and tungsten. The surface roughness of coatings was 7 microns. Were conducted tests on the durability of FeWMoCrBC metallic glass coatings to microabrasive wear, and dry sliding abrasion with a silicon carbide abrasive disk. It is shown that the FeWMoCrBC amorphous electrospark coatings improve wear resistance and microhardness of the steel 1035 in 2 -4 times, respectively. In general, despite the significant differences in the composition of the electrode materials obtained from the coating of metallic glasses had very similar properties. Работа посвящена изучению возможности создания аморфного состояния в металлических материалах в процессе электроискрового воздействия. Методом порошковой металлургии получены FeWMoCrBC сплавы двух различных составов, которые использованы в качестве анодных материалов для нанесения покрытий на подожки из стали 35 методом электроискрового легирования. Изучена кинетика изменения масс электродов в процессе осаждения по-крытий. Установлено, что при использовании электрода из FeWMoCrBC сплава с более высоким содержанием же-леза привес катода выше за счет лучший адгезии к стальной подложке. Толщина созданных покрытий составляет около 40 мкм. По данным рентгеновской дифрактометрии покрытия обладают структурой, аналогичной металличе-ским стеклам. На основе результатов дифференциальной сканирующей калориметрии определено, что материал по-крытий начинает кристаллизоваться в процессе нагрева при температурах свыше 781 -786°С. После отжига при тем-пературе 1200°С в электроискровых покрытиях наблюдаются карбиды железа, вольфрама и бора; бориды железа, молибдена и вольфрама; а также хром и вольфрам как отдельные фазы. Шероховатость покрытий по критерию Ra была около 7 мкм. Испытания стойкости покрытий из металлических FeWMoCrBC стекол к микроабразивному из-носу, а также сухому трению об абразивный диск из карбида кремния, показали, что износостойкость аморфных электроискровых покрытий выше износо...

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Investigation of WC-Co Electrospark Coatings with Various Carbon Contents

Бурков

Pyachin

2014

J. of Materi Eng and Perform

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A modern representation of the behaviour of electrospark alloying of steel by hard alloy

Cited by 34 publications

References 1 publication

Formation of WC–Co coating by a novel technique of electrospark granules deposition

Formation of WC–Co coating by a novel technique of electrospark granules deposition

Development and study of FeWMoCrBC metallic glass coatings synthesized by electrospark deposition

Investigation of WC-Co Electrospark Coatings with Various Carbon Contents

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