UDC 669.15
© V. G. Komkov, 2012
STUDY OF INFLUENCE OF ALLOYING ELEMENTS ON THE STRUCTURE OF THE LIQUID PHASE, THE CRYSTALLIZATION PROCESS AND THE STRUCTURE FOR-MATION OF BRONZE
A comprehensive study of the effect of alloying elements (Sn, Al, Si, Mn, Zn, Ni, As) on the structure of the liquid phase, crystallization and structure formation of bronze has been made. It was revealed that all alloying elements investigated increase the degree of compaction-ΔJl (shrinkage) and the coefficient of thermal contraction αl of liquid bronze, except nickel, which reduces the values of these parameters of the liquid state due to the weakening of the binding forces between atoms of copper and ones of alloying elements (FCu-Cu>FCu-X). All the alloying elements reduce the onset temperature tl and the end tс crystalliza-tion temperature, except nickel, which increases the crystallization temperature of bronze. Also, all the alloying elements extend the temperature range of crystallization of α-solid solution, have a high degree of compaction of the melt crystallization –ΔJcr.
Keywords: copper alloys, phase diagrams, dopants, nucleation and crystallization parameters.
References:
- Lyakishev N.P. Diagrammy sostoyaniya dvoynykh metallicheskikh sistem. - M.: Mashinostroenie, 1997. - 1024 s.
- Bochvar N.R., Leonova N.P. Legirovanie splavov na osnove medi dlya poluche-niya plionochnykh materialov so spetsial`nymi svoystvami // Tekhnologiya legkikh spla-vov. - 2009. - № 3. - S. 71-76.
- Kolachev B.A., Livanov V.A., Elagin V.I. Materialovedenie i termicheskaya ob-rabotka tsvetnykh metallov i splavov. - M.: Metallurgiya, 1972. - 480 s.
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