Abstract
This work are presented the research results of pulse plasma treatment influence on the phase composition, hardness, roughness and element composition of coatings on the bases of Fe-TiB2-CrB2. The Fe-TiB2-CrB2 coating was deposited by detonation method. The following pulse-plasma treatment was used to modify the structure and properties of the surface layers of the sprayed coating. The results of mechanical experiments showed that the hardness of Fe-TiB2-CrB2 coating increased after the treatment. On the basis of the X-ray analysis, it has been established that the increase of coating hardness is connected with phase transformations in a surface layer, in particular, with formation of oxide phases and increase of carbide particles quantity.
Highlights
One of the main problems of modern aviation industry is to improve the quality, reliability and durability of parts, units and mechanisms
On the basis of the X-ray analysis, it has been established that the increase of coating hardness is connected with phase transformations in a surface layer, in particular, with formation of oxide phases and increase of carbide particles quantity
On the bases of the experimental obtained data and their analysis, the following conclusions were drawn: Fe-TiB2-CrB2 coating on the bases of Fe reinforced by TiB 2 and CrB2 was successfully obtained by the method of detonation sputtering and processed by pulse-plasma treatment method
Summary
One of the main problems of modern aviation industry is to improve the quality, reliability and durability of parts, units and mechanisms. Development of materials for such parts is complicated by harsh operating conditions: high cyclically changing temperatures, dynamic nature of load mode changes, aggressiveness of highspeed gas flow consisting of fuel combustion products This problem can be solved by applying effective methods of manufacturing, restoration and hardening of machine parts by applying special materials that ensure obtaining coatings with the specified physical and mechanical properties [1, 2]. Such materials, in terms of price and quality, can be powder three and more component eutectic alloys on the bases of iron with refractory borides [3,4,5]. High strength and tribotechnical properties in a range of temperatures up to 0.9 Tpl (900-1100 ◦ C) are caused by this condition of alloys [6, 7]
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