非混相铝锡合金强制对流直接冷铸造模拟器的内部设计

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2021-08-25 DOI:10.1080/13640461.2021.1970937

Deepak Patel, A. Kundu, Arjun Kundu, P. Biswas, H. Kotadia, A. Mallik, S. Das

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引用次数: 1

摘要

摘要Al-Sn不混溶合金具有增强的摩擦学性能和提高的疲劳强度，这使其在自润滑轴承材料中具有竞争力。本工作设计并制造了一种采用强制对流技术铸造铝锡合金的直接激冷（DC）铸造模拟装置。该研究体现了机械强制对流（MFC）的两种不同机制：（i）高剪切（HS）转子-定子装置，（ii）无定子的传统搅拌器（CS）。对于这两种情况，800rpm持续60秒的剪切速率保持恒定。在CS-DC铸坯中，由于富锡相与Al基体的普遍相分离和重力沉降，观察到锡的严重偏析。然而，在HS-DC铸坯的情况下，已经实现了Sn和细小等轴晶粒在整个铸坯体积中的均匀分布。

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In-house design of forced convection direct chill casting simulator for casting immiscible Al-Sn alloys

ABSTRACT Al-Sn immiscible alloys possess enhanced tribological properties with increased fatigue strength, which makes them competent among self-lubricating bearing materials. In the present work, a direct chill (DC) casting simulator has been designed and manufactured to cast Al-Sn alloy by forced convection technology. The study embodies two different mechanisms for mechanical forced convection (MFC) by: (i) high shear (HS) rotor-stator device, (ii) conventional stirrer (CS) without stator. Shearing rate of 800 rpm for 60 seconds were kept constant for both the cases. Severe segregation of Sn has been observed in CS-DC cast billet due to prevailed phase separation and gravity sedimentation of Sn-rich phase from Al matrix. However, in the case of HS-DC cast billet uniform distribution of Sn and fine equiaxed grains throughout the volume of the billet has been achieved.

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.