微量Sc对2A14铝合金轮毂组织与性能的影响

肖代红; 吴名冬; 余永新

doi:10.15980/j.tzzz.2020.01.006

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微量Sc对2A14铝合金轮毂组织与性能的影响
Effects of Minor Sc Addition on Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Wheel Hubs
2020年40卷第1期页码：26-29
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.01.006

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[1]肖代红,吴名冬,余永新.微量Sc对2A14铝合金轮毂组织与性能的影响[J].特种铸造及有色合金,2020,40(01):26-29.

Xiao Daihong, Wu Mingdong, Yu Yongxin. Effects of Minor Sc Addition on Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Wheel Hubs[J]. Special Casting & Nonferrous Alloys, 2020,40(1):26-29.
[1]肖代红,吴名冬,余永新.微量Sc对2A14铝合金轮毂组织与性能的影响[J].特种铸造及有色合金,2020,40(01):26-29. DOI： 10.15980/j.tzzz.2020.01.006.

Xiao Daihong, Wu Mingdong, Yu Yongxin. Effects of Minor Sc Addition on Microstructure and Mechanical Properties of 2A14 Aluminum Alloy Wheel Hubs[J]. Special Casting & Nonferrous Alloys, 2020,40(1):26-29. DOI： 10.15980/j.tzzz.2020.01.006.

摘要

采用铸锭冶金及等温复合锻造方法

制备了含Sc的2A14铝合金轮毂锻坯

研究了Sc对锻坯组织与性能的影响。结果表明

Sc含量提高至0.3%时

2A14铝合金的晶粒得到明显的细化

大部分晶粒呈等轴晶状态。添加Sc提高了2A14铝合金的伸长率

但其抗拉强度明显降低

使其低于400MPa

原因在于添加Sc后

大量消耗2A14铝合金中的Cu元素

导致强化相θ′-Al2Cu体积分数减少。但Sc能有效抑制合金中的再结晶

减小轮毂锻坯各部位的性能差异

并提高合金的耐热性能。

Abstract

2 A14 aluminum alloys wheel hub forging blank with different Sc contents were prepared by casting and isothermal compound forging.Effects of Sc additions on the mechanical properties and microstructure of 2 A14 aluminum alloy wheel hubs were investigated.The results reveal that the grain in the 2 A14 aluminum alloy can be refined greatly

and most of the grains present equiaxed grain with the addition of Sc element to 0.3%.Although the Sc element can improve the elongation of the 2 A14 aluminum alloy wheel hub

it can reduce significantly tensile strength to below 400 MPa

which is mainly related to the fact that the Sc element can consume Cu elements in the 2 A14 aluminum alloy

resulting in a decrease of strengthening phaseθ′-Al2 Cu.However

the Sc element can inhibit recrystallization

narrow the performance difference between the various parts of the alloy hub

and thus improving the thermal stability.