分级电磁搅拌对半固态Al-Cu合金凝固组织的影响

发布时间：2018-05-03 02:41

  本文选题：ZL铝合金 + 半固态　； 参考：《中国有色金属学报》2015年01期

【摘要】：采用自制变频控制的电磁搅拌装置制备半固态ZL203铝合金浆料,分析不同搅拌时间和搅拌频率下初生α相的形貌和尺寸,研究在连续搅拌过程中变换频率对合金熔体进行分级搅拌的影响。结果表明:分级搅拌可以有效地改善半固态合金浆料的质量;适合于半固态ZL203合金的分级电磁搅拌工艺如下:ZL203合金经670℃浇注后,先在40 Hz的频率下搅拌5 s,再在30 Hz的频率下搅拌10 s,并于620℃温度下保温5 min。经此工艺制备的半固态ZL203合金铸锭具有较好质量:其中心部区域晶粒平均等积圆直径为85.62μm,平均形状因子为0.86;边缘区域晶粒的平均等积圆直径为84.52μm,平均形状因子达到0.85。
[Abstract]:Semi-solid ZL203 aluminum alloy slurry was prepared by a self-made electromagnetic stirring device controlled by frequency conversion. The morphology and size of the primary 伪 phase at different stirring time and frequency were analyzed. The effect of frequency conversion on the graded stirring of alloy melt during continuous stirring was studied. The results show that graded stirring can effectively improve the quality of semi-solid alloy slurry, and the graded electromagnetic stirring process suitable for semi-solid ZL203 alloy is as follows: 1. ZL203 alloy is casted at 670 鈩，

本文编号：1836640