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Mn/B复合添加对铝硅合金富铁相特征的影响
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作者单位:

广州有色金属研究院 金属加工与成型技术研究所,广州有色金属研究院 金属加工与成型技术研究所,广州有色金属研究院 金属加工与成型技术研究所,广州有色金属研究院 金属加工与成型技术研究所,广州有色金属研究院 金属加工与成型技术研究所

基金项目:

广东省金属强韧化技术与应用重点实验室建设项目(2014B030301012)；广东省金属材料与加工专业镇联合创新公共平台建设项目(2013B091602002),广州市先进金属结构材料重点实验室建设项目(201509010003)。


Effect of compound addition Mn/B on the characteristics of iron-rich phase in Al-Si alloy
Author:
Affiliation:

Institute of Metal Processing and Forming Technology,Guangzhou Research Institute of Non-ferrous Metals,Institute of Metal Processing and Forming Technology,Guangzhou Research Institute of Non-ferrous Metals,Institute of Metal Processing and Forming Technology,Guangzhou Research Institute of Non-ferrous Metals,Institute of Metal Processing and Forming Technology,Guangzhou Research Institute of Non-ferrous Metals,Institute of Metal Processing and Forming Technology,Guangzhou Research Institute of Non-ferrous Metals

Fund Project:

International Science Technology Cooperation Program of China (2015DFR50350); Specialized Research Fund for the Doctoral Program of Higher Education (20116118120017); Scientific Research Program Funded by Shaanxi Provincial Education Department (2014JK1531); Innovation Project of Xi'an Institute of Technology (2014CX024)

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    摘要:

    在含1.0?的铝硅合金中复合加入一定量的Mn和不同量的B，采用OM、SEM、EDS及DSC等手段研究了B含量对铸态组织、富铁相比例及形貌的影响，并探讨了复合添加Mn/B的影响机制。结果表明：适量的B对Al-Si合金晶粒度、富铁相都具有明显的细化作用；添加3%Al-3B时，富铁相面积分数和平均颗粒尺寸分别从6.73%和11.2μm降至4.13%和7.5μm；在3%之内添加Al-3B可抑制粗大初生铁相的形成，促进富铁相由粗大星状初生铁相、大尺寸树枝状、网状共生富铁相向小尺寸致密度高的树枝状、汉字状和粒状富铁相状变；过量的Al-3B易导致多边形初生铁相的出现，但合金组织和共生铁相得到进一步的细化。

    Abstract:

    The effect of B addition on the morphology of iron-rich phase in Al-Si alloy with ?1.0% Fe and ?1.0% Mn was invesitigated with optical microscopy, SEM, EDS and DSC. The obtained results show that an appropriate amount of B addition results in not only an obvious refinement on Al-Si alloy grain, but also the morphology, size and volume fraction of the iron-rich phases. With 3% Al-3B addition, the volume fraction and mean size of the iron-rich phases were reduced to 4.13% and 7.5 μm, respectively. With the increase of Al-3B addition within 3%, the formation of coarse primary iron-rich phase has been suppressed, and the primary coarse iron phase, large size dendritic iron-rich phase and netlike iron-rich phase are transformed into small size and high density of dendritic, chinese script shaped and granular. However, excessive Al-3B addition leads to the formation of polygon primary iron rich phase and refined grain size and iron-rich phase.

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引用本文

宋东福,周楠,徐静,王顺成,郑开宏. Mn/B复合添加对铝硅合金富铁相特征的影响[J].稀有金属材料与工程,2016,45(8):2133~2138.[SONG Dong-fu, ZHOU Nan, XU Jing, WANG Shun-cheng, ZHENG Kai-hong. Effect of compound addition Mn/B on the characteristics of iron-rich phase in Al-Si alloy[J]. Rare Metal Materials and Engineering,2016,45(8):2133~2138.]
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  • 收稿日期:2015-11-03
  • 最后修改日期:2016-01-18
  • 录用日期:2016-03-30
  • 在线发布日期: 2016-10-09

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