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ELECTRIC CONTACT SINTERING OF POWDER COATINGS AND PROVISION OF THEIR PROPERTY STABILITY

Abstract

The paper proposes methods for improvement of coating quality which are obtained with the help of electric contact sintering of powders. These methods presuppose heating of metallic powder located between a part and a roller electrode at the expense of thermal energy released by electric current with active resistance. Stabilization of properties along length of a surface to be hardened is obtained with the help of temperature regime regulation in the sintering zone and uniformity of properties along width is ensured by technical solutions that create favourable conditions for formation of edge parts of the sintered layer. The preliminary powder packing using an effect of “flowing wedge” and two-stage heating significantly improve physical and chemical properties of the coatings.

 

About the Author

V. K. Yaroshevich
Belarussian National Technical University


References

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2. Ярошевич, В. К. Электроконтактное упрочнение / В. К. Ярошевич, Я. С. Генкин, В. А. Верещагин. – Минск : Наука и техника, 1982. – 256 с.

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4. Дорожкин, Н. Н. Технологические основы получения порошковых покрытий с использованием импульсных методов / Н. Н. Дорожкин, В. К. Ярошевич, А. С. Гурский // Математические модели физических процессов: материалы 11-й междунар. науч. конф. – Таганрог : Изд-во ТГПИ, 2005. – С. 51–56.


Review

For citations:


Yaroshevich V.K. ELECTRIC CONTACT SINTERING OF POWDER COATINGS AND PROVISION OF THEIR PROPERTY STABILITY. Science & Technique. 2009;(1):18-21. (In Russ.)

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ISSN 2227-1031 (Print)
ISSN 2414-0392 (Online)