THE FORMATION OF ALUMINOTITANIZED COATINGS ON COPPER ALLOYS UNDER SELF-PROPAGATION HIGH-TEMPERATURE SYNTHESIS
Journal Title: Математичне моделювання - Year 2018, Vol 1, Issue 1
Abstract
OPTIMIZATION OF COMPOSITIONS OF MULTICOMPONENT PROTECTIVE COATINGS ON BROTHERS AND BRASSES OBTAINED IN THE CONDITIONS OF SELF-SPREADING HIGH-TEMPERATURE SYNTHESIS Kruglyak I.V., Kruglyak D.O., Sereda D.B. Abstract The results of the investigation of Ti-Al-Si, Ti-Al-Cr brass and bronze in the conditions of SHS are given in the work. The saturation process was studied at temperatures of 750 ± 850 ºС with exposure at these temperatures in the range of 0.5-1.5 h. As studies have shown, the process of titanium-alumino-siliconization at a temperature of 800 ºС and a process duration of 1.5 hours is most intensive. With an increase in exposure for more than 1.5 hours, the depth of the diffusion layer varies insignificantly. At a temperature of 850 °C and a duration of 1.5 hours, the samples are reflowed. As a result of the regression analysis, a number of equations were obtained showing the dependence of the physical and mechanical properties of the protective coatings on the content of silicon, chromium, aluminum, and titanium. In a study on heat resistance, it was found that with increasing silicon content, the weight loss decreases. All other alloying elements (titanium, aluminum) are recommended to be taken at the upper level (10-15% by weight) in order to compensate for metal losses. The optimal mode of auto-ignition process is: holding temperature - 900 ºС, holding time - 60 min, maximum heating temperature 800 ºС. As a result of the thermodynamic analysis of the reactions of SHS mixtures, in the regime of thermal self-ignition, physico-chemical transformation schemes were developed, including 5 stages: inert heating; thermal self-ignition (the main exothermic reaction occurs); achievement of maximum process temperature; exothermic aging and cooling. References [1] Shtessel EA, Kostogorov EP, Kalashnikova LV, Merzhanov AG Private communication, 1978. [2] Merzhanov AG Combustion and synthesis of materials. Chernogolovka: ISMAN, 1998. - 512 p. [3] Sereda BP, Kruglyak IV, Zherebtsov OA, Bialokon Yu.O. A metal box in a tics with unsteady temperature. - Запоріжжя: Вид-во ЗДІА, 2009 - 252 с. [4] Sereda BP, Kalinina N.Є., Kruglyak І.V. Поверхневе зміцнення матеріалів: Monograph. - Запоріжжя: Вид-в ЗДІА, 2004. - 230 с. [5]. Yampolsky AM, Ilyin V.A. Quick reference electroplating. - M .: Mechanical Engineering, 1983. - 210 p. [6] Titlyanov AE, Radyuk AT, Kuznetsov VE Creation of wear-resistant layers on copper products // Material science. - 1998. - No. 12. - P. 42-44.
Authors and Affiliations
I. V. Kruglyak, D. O. Kruglyak, D. B. Sereda
Keywords
Related Articles
- EP ID EP297108
- DOI 10.31319/2519-8106.1(38)2018.129035
- Views 65
- Downloads 0
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