励磁电流-凝固压力协同对真空差压铸造ZL205A合金晶粒尺寸的影响
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摘要
通过测试交变磁场-凝固压力协同场下ZL205A合金晶粒尺寸,研究交变磁场-凝固压力协同场对ZL205A合金晶粒尺寸的影响机理。结果表明,在凝固压力不变的情况下,随着励磁电流强度增加,ZL205A合金试样的平均晶粒尺寸先增大后减小;随着凝固压力增大,当励磁电流强度小于10A时,交变磁场-凝固压力的协同作用将促进合金晶粒长大;而当励磁电流大于10A时,交变磁场-凝固压力的协同作用将抑制晶粒长大。
The effects of alternating magnetic field-solidification pressure on the grain size of ZL205 Aalloy were investigated by observing the grain size in ZL205 Aalloy under the interaction field of alternating magnetic field and solidification pressure.The results reveal that the average grain size of ZL205 Aalloy sample is increased firstly and then decreased with the increase of excitation current intensity.With the increase of solidification pressure,when the excitation current intensity is less than 10 A,the synergistic effect of the variable magnetic field-solidification pressure can promote the grain growth in the alloy,and the average grain size will be coarsened.When the excitation current is more than 10 A,the synergistic effect of the alternating magnetic field-solidification pressure will inhibit grain growth and average grain size is refined.
The effects of alternating magnetic field-solidification pressure on the grain size of ZL205 Aalloy were investigated by observing the grain size in ZL205 Aalloy under the interaction field of alternating magnetic field and solidification pressure.The results reveal that the average grain size of ZL205 Aalloy sample is increased firstly and then decreased with the increase of excitation current intensity.With the increase of solidification pressure,when the excitation current intensity is less than 10 A,the synergistic effect of the variable magnetic field-solidification pressure can promote the grain growth in the alloy,and the average grain size will be coarsened.When the excitation current is more than 10 A,the synergistic effect of the alternating magnetic field-solidification pressure will inhibit grain growth and average grain size is refined.
引文
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[13]杨普超,严青松,芦刚,等.超声功率对差压铸造ZL114A铝合金硬度的影响[J].特种铸造及有色合金,2017,37(10):1 084-1 087.
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[3]严青松,余欢,芦刚,等.结晶压力对真空差压铸造铝合金二次枝晶间距的影响[J].中国有色金属学报,2014,24(5):1 194-1 199.
[4]YAN Q S,YU H,XU Z F,et al.Effect of holding pressure on the microstructure of vacuum counter-pressure casting aluminum alloy[J].Journal of Alloys and Compounds,2010,501:352-357.
[5]SU X,LI M N,ZHANG A P,et al.Effect of electromagnetic field on the micromor phology of twin-roll cast 7075alloy[J].Rare Metal Materials and Engineering,2014,43(10):2 354-2 358.
[6]张丰收,寇宏超,李金山,等.交变磁场作用下特种合金的凝固特性[J].粉末冶金材料科学与工程,2005,10(4):206-210.
[7]李勇,交变磁场对真空差压铸造铝合金铸件组织和性能的影响[D].南昌:南昌航空大学,2013.
[8]陈志俊,高桂丽,张立鑫,等.旋转磁场对Al-4.5%Cu合金凝固组织的影响[J].铸造,2017,66(3):238-241.
[9]何洪亮,郭二军.交替变向电磁场对Al-5Cu合金缩孔和缩松的影响[J].中国有色金属学报,2005,15(6):888-892.
[10]MA J,WANG B X.The penetration rate of solid-liquid phasechange heat transfer interface with different kinds of boundary conditions[J].International Journal of Heat and Mass Transfer,1995,38(13):2 135-2 138.
[11]KIM K H,HYUN J M,KWAK H S.Buoyant convection in a side-heated cavity under gravity and oscillations[J].International Journal of Heat and Mass Transfer,2001,44:857-861.
[12]严青松,余欢,芦刚,等.结晶压力对真空差压铸造铝合金二次枝晶间距的影响[J].中国有色金属学报,2014,24(5):1 194-1 199.
[13]杨普超,严青松,芦刚,等.超声功率对差压铸造ZL114A铝合金硬度的影响[J].特种铸造及有色合金,2017,37(10):1 084-1 087.
[14]胡壮麒,介万奇.凝固技术[M].北京:冶金工业出版社.1988.