Evolution of Primary Phase in A357 Semi-solid Aluminum Alloy During Reheating and Forming Process;
A357半固态初生相在二次加热和成形过程中的演变行为
Correlation between crystallization kinetics of amorphous alloys and primary phases during crystallization;
非晶合金的晶化动力学与初生相的内在联系
Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy;
Y对A356铝合金半固态初生相形貌的影响
Heat transfer in two-stage slitless mold for soft-contact electromagnetic continuous casting and thickness of initial solidified shell were analyzed through numerical simulation method.
利用数值模拟研究了软接触电磁连铸中两段式无缝结晶器的传热及初生坯壳的厚度。
The results indicated that the particles of α-Al phase,which were non-existent for non-stirring casting of Al-20%Mg2Si hypereutectic alloy,appeared for electromagnetic agitation and the primary Mg2Si with cluster distributed on the matrix of alloy.
结果表明:Al-20%Mg2Si过共晶合金在电磁搅拌下出现了非搅拌凝固中所没有的-αAl相晶粒,初生Mg2Si呈簇状分布在基体上,且随着搅拌电压的升高,α-Al相晶粒尺寸减小,Mg2Si团簇尺寸增大;而且电磁搅拌下,Al-20%Mg2Si过共晶合金的硬度随搅拌电压增加而增加。
The experimental results show that the Al-P or Al-Ti-B can refine and modify primary Mg2Si, and the refinement and modification efficiency of Al-P master alloy can be improved after the addition of Al-Ti-B.
结果表明,Al-P和Al-Ti-B中间合金均可对Mg2Si产生较好的细化和变质效果,并且Al-Ti-B对Al-P的细化变质效果有促进作用,初生Mg2Si颗粒形态由枝晶变为多边形,平均颗粒尺寸由100μm以上细化至20μm左右。
Rheological behavior of semisolid A356 alloy with different morphology of primary α phases;
液固温区不同初生α相形态A356合金的流变行为
The crack propagation behavior of primary α phase under tension and cyclic load has been observed in-situ by SEM for near-α type TA15 titanium alloy.
利用带载荷台的扫描电镜原位观察了近α型钛合金TA15中初生α相在单向拉伸和循环交变载荷下裂纹的扩展行为 ,结果表明 :单向拉伸时 ,由于初生α相强度高于基体 β转变组织 ,裂纹遇到初生α相时一般不能穿过而是绕过 ;而在交变载荷下 ,由于基体 β转变组织产生循环硬化 ,其强度水平与初生α相相当 ,裂纹遇到初生α相时可直接贯穿 ,并沿与应力垂直的水平方向扩展。
Effects of Cooling Rate on Primary Si in Hypereutectic Al-Si Alloy;
冷却速度对过共晶Al-Si合金初生Si的影响规律
This thesis studied the effect of cooling rate and the stirring intensity on the equivalent diameter and the aggregation of the primary Si particles during the producing of the semi-solid slurry by electromagnetic stir, so offered foundation for producing largely the hypereutectic Al-Si alloy semi-solid slurry.
本文系统地研究了电磁搅拌制备半固态过共晶Al-Si合金浆料过程中,搅拌强度和冷却速度对浆料组织中初生Si等效直径、聚集现象的影响,从而为工业化电磁搅拌制备半固态过共晶Al-Si合金浆料工艺参数的确定提供依据。
Growth behavior of primary silicon in hypereutectic Al-Si alloy;
过共晶Al-Si合金熔体中初生硅生长特性
The effects of electromagnetic vibration on the distribution and morphology of primary silicon in the Al-18%Si alloy have been investigated systematically.
研究了强磁场与交变电流复合作用产生的振荡对Al-18%Si合金中初生硅分布和形貌的影响规律。
The purification efficiency of Al- Si 24% hypereutectic alloy and the macro-distribution of primary silicon in the same power and different time were investigated through the high frequency magnetic field.
通过高频磁场净化试验研究了Al Si24%过共晶合金在相同功率,不同净化时间下宏观初生硅相的分布成因及净化效率。
The results show that primary silicon crystal fragmentation occurs in the course of stirring,the size of the primary silicon crystal tends to be constant after 20minutes and its phase tends to be in a homogenized distribution.
分别在580℃、600℃下等温搅拌0 m in、10 m in、20 m in和30 m in,实验结果显示:随着搅拌时间的增加,初生硅发生细化,尺寸明显变小且边角更加钝化,分布也更加均匀;当搅拌时间超过20 m in后,初生硅尺寸变化不大,分布趋于均匀。