| 牛艳萍,杨勇,唐维学,王彩华,管尽琼.晶粒细化对Al-3.2Si-0.8Mg合金组织性能的影响[J].有色金属材料与工程,2017,38(2):73-77. |
| 晶粒细化对Al-3.2Si-0.8Mg合金组织性能的影响 |
| Effects of Grain Refinement on Microstructures and Properties of Al-3.2Si-0.8Mg Alloy |
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| DOI：10.13258/j.cnki.nmme.2017.02.003 |
| 中文关键词: Al-Si-Mg合金 晶粒细化 铸造流动性 导热系数 |
| 英文关键词:Al-Si-Mg alloy grain refinement casting fluidity thermal conductivity |
| 基金项目:广东省科学院科研平台环境与能力建设专项资助项目（2016GDASPT-03，2016GDASPT-0201） |
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| 中文摘要: |
| 采用Al-5Ti-1B合金细化剂对Al-3.2Si-0.8Mg合金进行晶粒细化，采用金相显微镜、激光导热仪和拉伸试验机等研究晶粒细化对Al-3.2Si-0.8Mg合金微观组织、铸造流动性、力学性能与导热系数的影响.结果表明：随着Al-5Ti-1B合金细化剂添加量的增加，Al-3.2Si-0.8Mg合金的α-Al晶粒逐渐细化，铸造流动性、抗拉强度和伸长率逐渐升高，但导热系数略有下降.当Al-5Ti-1B合金细化剂的质量分数增加到0.5%时，Al-3.2Si-0.8Mg合金的晶粒被细化至平均直径约为90.9 μm，铸造流动性试样长度为867 mm，抗拉强度为234 MPa，伸长率为10.1%，导热系数为182.7 W·m-1·K-1. |
| 英文摘要: |
| The Al-3.2Si-0.8Mg alloy was refined through adding Al-5Ti-1B alloy refiner.The effects of grain refinement on casting fluidity,thermal conductivity and mechanical properties of Al-3.2Si-0.8Mg alloy were studied by metallurgical microscope,flash thermal conductivity meter and tensile testing machine,respectively.The results show that with the increasing amount of Al-5Ti-1B alloy refiner,the α-Al grains of Al-3.2Si-0.8Mg alloy were more refined.In addition,the casting fluidity,tensile strength and elongation of Al-3.2Si-0.8Mg alloy were improved,and the thermal conductivity was reduced.When the amount of Al-5Ti-1B alloy refiner was 0.5%,the grains size was able to be refined to 90.9 μm for Al-3.2Si-0.8Mg alloy with casting fluidity of length 867 mm,tensile strength of 234 MPa,elongation of 10.1%,and thermal conductivity of 182.7 W·m-1·K-1. |
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