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| 1 | 返回料及精炼工艺对A356铝合金净化效果的影响显示文摘研究了返回料添加比例对A356铝合金夹杂物尺寸、含量的影响,通过力学性能测试,分析了返回料的添加对A356铝合金力学性能稳定性的影响,并研究了旋转喷吹精炼工艺参数对铝液密度、夹杂物尺寸和含量的影响。结果表明,随着返回料比例增加,合金中夹杂物尺寸增大、含量增加,合金力学稳定性下降。通过适当增加转子转速和气体流量、设置合适的气体压力,可以提高除气、除杂效率。添加30%返回料的A356铝合金熔体的最佳精炼工艺参数:转子转速为550 r/min,气体压力为0.8 MPa,气体流量为20 L/min。在此工艺参数条件下,铝液密度可以达到2.657 g/cm~3,夹杂物体积分数可降低至0.08%,铝液纯净度满足生产要求。 | 程颖 洪涛 魏怀远 韩尚伟 马晗雨 张花蕊 张虎 | 2022 | 特种铸造及有色合金2022，42，11： | 2 |
| 2 | Influence of Al-B grain refiner on porosity formation of directionally solidified Al-Si alloys显示文摘This work aims to present a perspective for porosity formation in three different alloys:A356,A413 and A380.1 by taking into account the addition of Al-B grain refiners:AlTi5B1 and Al3B.The directional solidification method was used,and microstructural changes of the alloys and its correlation with porosity formation were investigated.Pore size,number of pores,average pore length and distribution of pores were statistically analyzed.Also,external shrinkage was examined,and the volume of external shrinkage was calculated.It was found that there was a relationship between external shrinkage and the size and number of pores.As the size and number of pores internally decrease,external shrinkage increases.Additionally,porosity is decreased in all the three Al-Si alloys when Al-B grain refiners are used.The distribution of pore diameters is low when AlTi5B1 is used.Grain refiners have a different effect on porosity formation of Al-Si alloys with regard to their solidification morphology. | Muhammet Uludağ | 2020 | China Foundry2020，17，5： | 0 |
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