N. A. Belov, A. I. Kovalev, D. A. Vinnik, K. A. Tsydenov
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引用次数: 0
Abstract
Based upon the Al-Cu-Mn system, aluminum hypoeutectic heat resistant aluminum alloy of the Al4Cu2Mn0.5Ca0.2Zr (wt. %) (P2) composition is developed, synthesized, and studied. An effect of increasing thermal stability is achieved due to nanosize dispersed intermetallics Al20Cu2Mn3 and Al3Zr, and also with addition of eutectic-forming elements, whose role is played by calcium. It is established that reserves of alloying an aluminum matrix within piston silumin is almost exhausted by the limit of silicon, copper and manganese solubility within aluminum solid solution. In order to substantiate the piston silumin P1 chemical composition a calculation is made for the phase composition of the Al-Si-Cu-Mg-Ni-Fe-Mn system by means of Thrmoclac software. Welded alloy microstructure is studied by means of electron microscopy (SEM) and X-ray microanalysis (XRMA). Vickers hardness of the alloy proposed P2 and equivalent piston silumin P1 is compared in the original condition and after annealing at 250 and 400 °C with a step of 50 °C, as a result of which alloy P2 developed retains more effectively hardness on heating, than for alloy P1, being potentially more heat resistant.
期刊介绍：
Metallurgist is the leading Russian journal in metallurgy. Publication started in 1956.
Basic topics covered include:
State of the art and development of enterprises in ferrous and nonferrous metallurgy and mining;
Metallurgy of ferrous, nonferrous, rare, and precious metals; Metallurgical equipment;
Automation and control;
Protection of labor;
Protection of the environment;
Resources and energy saving;
Quality and certification;
History of metallurgy;
Inventions (patents).
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