Comparative analysis of phase composition and heat resistance of piston silumin and experimental alloy Al4Cu2Mn0·5Ca0·2Zr (wt. %)

IF 0.8 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metallurgist Pub Date : 2024-10-24 DOI:10.1007/s11015-024-01793-4

N. A. Belov, A. I. Kovalev, D. A. Vinnik, K. A. Tsydenov

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Abstract

Based upon the Al-Cu-Mn system, aluminum hypoeutectic heat resistant aluminum alloy of the Al₄Cu₂Mn_0.5Ca_0.2Zr (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.

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活塞硅铝和实验合金 Al4Cu2Mn0-5Ca0-2Zr （重量百分比）的相组成和耐热性对比分析

以 Al-Cu-Mn 体系为基础，开发、合成并研究了 Al4Cu2Mn0.5Ca0.2Zr (wt. %) (P2) 成分的铝低共晶耐热铝合金。通过纳米级分散的金属间化合物 Al20Cu2Mn3 和 Al3Zr，以及添加共晶形成元素（钙在其中起作用），达到了提高热稳定性的效果。研究表明，由于硅、铜和锰在铝固溶体中的溶解度限制，活塞硅铝中铝基体的合金储备几乎耗尽。为了证实活塞硅铝 P1 的化学成分，使用 Thrmoclac 软件计算了铝-硅-铜-镁-镍-铁-锰系统的相组成。通过电子显微镜（SEM）和 X 射线显微分析（XRMA）对焊接合金的微观结构进行了研究。比较了合金 P2 和等效活塞硅 P1 的维氏硬度，前者在原始状态下，后者在 250°C 和 400°C 下退火，退火步骤为 50°C，结果发现合金 P2 在加热时比合金 P1 能更有效地保持硬度，具有更强的耐热性。

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来源期刊

Metallurgist 工程技术-冶金工程

CiteScore

1.50

自引率

44.40%

发文量

151

审稿时长

4-8 weeks

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).