熔化和热处理条件对A356铝合金冲击韧性的影响（英文）

发布时间：2018-01-08 09:08

本文关键词：熔化和热处理条件对A356铝合金冲击韧性的影响（英文）　出处：《Transactions of Nonferrous Metals Society of China》2016年04期 　论文类型：期刊论文

更多相关文章： A铝合金 改性 晶粒细化 冲击韧性

【摘要】：研究A356铝合金在非热处理和T6热处理条件下经熔化处理过程中的晶粒细化和改性后的显微组织和冲击性能。通过添加Al-10%Sr和Al-5Ti-1B中间合金分别实现改性和晶粒细化。为了重点突出上述处理的影响,所有的铸造参数都保持不变。结果表明:共晶硅形貌是控制合金冲击行为的主要参数。因此,铸态合金的晶粒细化不能像改性一样改善其冲击韧性。然而,相对于单个处理,同时进行晶粒细化和改性能提供更高的冲击韧性。合金的T6热处理在所有的熔化处理条件下都改善了冲击韧性,这与共晶硅颗粒的进一步改性有关。为证明这些结果并阐明其机制,使用三点弯曲实验和金属断面的显微观察来阐述合金冲击韧性的改善。
[Abstract]:The grain refinement, modified microstructure and impact properties of A356 aluminum alloy during melting treatment under non-heat treatment and T6 heat treatment were studied. Al-10%Sr and Al-5Ti were added to the alloy. The modification and grain refinement of -1B master alloy were realized respectively. The results show that the morphology of eutectic silicon is the main parameter to control the impact behavior of the alloy. Therefore, the grain refinement of the as-cast alloy can not improve its impact toughness as modified. Compared with single treatment, grain refinement and modification can provide higher impact toughness. T6 heat treatment improves impact toughness under all melting conditions. This is related to the further modification of eutectic silicon particles. In order to prove these results and elucidate the mechanism, the improvement of impact toughness of the alloy is described by means of three-point bending test and microscopic observation of the metal section.
【作者单位】： Center
【分类号】：TG146.21;TG166.3
【正文快照】： 1 IntroductionSome of the main properties of Al-Si cast aluminumalloys are the superior wear resistance,low coefficient ofthermal expansion(CTE),high corrosion resistance,highspecific strength and excellent castability,which makethem one of the most appl

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