微合金化元素<strong>La</strong>对亚共晶<strong>Al-Si</strong>合金凝固组织与力学性能的影响

微合金化元素La对亚共晶Al-Si合金凝固组织与力学性能的影响

郑秋菊¹^,², 叶中飞³, 江鸿翔¹, 卢明³, 张丽丽¹, 赵九洲¹^,²(

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Effect of Micro-Alloying Element La on Solidification Microstructure and Mechanical Properties of Hypoeutectic Al-Si Alloys

ZHENG Qiuju¹^,², YE Zhongfei³, JIANG Hongxiang¹, LU Ming³, ZHANG Lili¹, ZHAO Jiuzhou¹^,²(

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图7. 不同La添加量下Al-6Si合金的DTA冷却曲线及α-Al和共晶Si的形核过冷度随La添加量的变化

Fig.7. Differential thermal analysis (DTA) cooling curves for the Al-6Si alloys with different additive amounts of La (a), and the change of the nucleation undercooling for the α-Al ( $Δ T α - A l$ ) and the eutectic Si ( $Δ T S i$ ) with different additive amounts of La (b)