Criteria of adhesive-cohesive equality of strength and the heat resistance of protective coatings

Lyashenko, B. A.

doi:10.1007/bf00776172

Cited by 8 publications

(12 citation statements)

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“…ЗПВ имеет форму сегмента окружности, что вызва-но нормальным (гауссовским) распределением мощности плазменной струи по площади пятна нагрева. Размеры ЗПВ и ее составляющих и характер изменения твердости в ЗПВ зависят, кроме режима обработки, от состава стали и исходного состояния [4]. При обработке без оплавления поверхности глубина ЗПВ состав-ляет 2,5-3,5 мм, ширина -в пределах 10-15 мм.…”

Section: методы исследованийunclassified

“…4с) и более вы-сокой твердости по сравнению с объемной за-калкой (табл. 1) [3][4][5][6][7][8][9][10].…”

Section: методы исследованийunclassified

“…Как правило, износостойкие покрытия из-за высокой хрупкости не исполь-зуют ресурс работы полностью. Как отмечено в [4], повышение адгезионной прочности покры-тий не обеспечивает решение данной пробле-мы, так как в сочетании с высокой твердостью и хрупкостью это приводит к дополнительному охрупчиванию и разрушению основного метал-ла задолго до исчерпания его ресурса. В ре-зультате возникает острая необходимость фор-мирования нового научного направления в три-бометалловедении, связанного с управлением поведением материалов за счет создания струк-турно неоднородных (регулярных) покрытий методами термического упрочнения, наплавки, напыления, осаждения [5].…”

Section: Introductionunclassified

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Hardening of Crane Rails by Plasma Discrete-Time Surface Treatment

Самотугин¹,

Гагарин²,

Мазур³

2017

Nauka teh.

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Section: методы исследованийunclassified

“…4с) и более вы-сокой твердости по сравнению с объемной за-калкой (табл. 1) [3][4][5][6][7][8][9][10].…”

Section: методы исследованийunclassified

Section: Introductionunclassified

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Hardening of Crane Rails by Plasma Discrete-Time Surface Treatment

Самотугин¹,

Гагарин²,

Мазур³

2017

Nauka teh.

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“…Thus, the indicated two characteristics are entirely used in the matrix-coating composition. The numerical results obtained according to the criterion of adhesion-cohesion equistrength [35] (lines) and the experimental data (symbols) for t adh * are presented in Fig. 3.…”

mentioning

confidence: 99%

“…The value t adh * corresponds to the optimal ratio of the adhesive and cohesive strengths of the coating specified by the criterion of adhesive-cohesive equistrength [35]. This criterion is used to determine the condition of simultaneous cohesion cracking and adhesive exfoliation.…”

mentioning

confidence: 99%

Optimization of the procedure of plasma spraying of erosion-resistant coatings according to strength criteria

Solovykh

Lyashenko

Dmitriev³

et al. 2008

Strength Mater

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It is shown that mechanical characteristics of the coatings depend on their technological conditions of their deposition. We propose a procedure of optimization of the technological process and control over this process according to the criteria of strength and specific consumption of materials by analyzing an example of plasma spraying of erosion-resistant coatings. The erosion resistance exhibits the most stable correlation with the cohesive strength of the coatings. The regression equations are used to determine the maximum levels of cohesive strength of the coatings and erosion resistance for the optimal combinations of technological parameters of.Introduction. The development of all technological processes (TP) is inevitably connected with the solution of the problems of optimization. In the field of development of hardening protective coatings (HPC), the problems of optimization play a key role. This is explained by the fact that numerous methods of deposition of the coatings in combination with a broad range of materials used to form the coatings and a great number of affecting factors offer numerous alternatives to the industrial engineers. In this case, the efficiency of decision-making depends on the existence of strength criteria used to control the technological processes.State-of-the-Art of the Problem. In view of the high sensitivity of the mechanical characteristics of coatings and matrices to the conditions of their deposition, special requirements are imposed on the optimization and realization of technological processes according to the strength criteria. There exist contradictory data concerning the influence of technological conditions on the operating characteristics of the HPC [1]. This is why attempts were made to systematize technological parameters both in the form of charts of the sources of influence on the properties of the coatings [2] and in the form of hierarchical schemes of parameters [3]. There are numerous works devoted to the determination of the optimal parameters and relationships between the technological conditions and properties of the coatings [4-8], including the works dealing with the stability of gas-thermal coatings under the conditions of gas-abrasive wear [9].In connection with the application of computers in systems of automated design of the technological processes and systems of automated control over these processes, we observe the appearance of a certain mismatch between the possibilities of computers and their application. Thus, the development of new mathematical models and software turns into an urgent problem. Modeling is based on the methods of the theory of the experiment planning and is performed by using computers. However, the developed mathematical models of the systems of automated design of technological processes and control over these processes do not cover a large number of the phenomena

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Mechanics of Components with Treated or Coated Surfaces

Menčík

1996

Solid Mechanics and Its Applications

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Criteria of adhesive-cohesive equality of strength and the heat resistance of protective coatings

Cited by 8 publications

References 0 publications

Hardening of Crane Rails by Plasma Discrete-Time Surface Treatment

Hardening of Crane Rails by Plasma Discrete-Time Surface Treatment

Optimization of the procedure of plasma spraying of erosion-resistant coatings according to strength criteria

Mechanics of Components with Treated or Coated Surfaces

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