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| 1 | 7055高强铝合金大型环件轧制技术研究显示文摘目的获得7055高强铝合金大型整体构件。方法开展了7055高强铝合金大型环件轧制技术研究,制定了7055高强铝合金环件轧制温度、轧制压缩比等工艺参数,制备了轧制试验坯料,对轧制后的大型环件进行了固溶时效强化热处理,并分析了显微组织和力学性能。结果通过研究,最终获得了切向、径向、轴向三向的抗拉强度均高于580 MPa,伸长率均大于8%,尺寸规格为Φ2000 mm级的7055高强铝合金大型环件。结论成功获得了满足研制需求的7055高强铝合金大型整体构件。 | 陈增奎 周卫卫 范新中 陈浩 涂光纯 | 2016 | 精密成形工程2016，8，4： | 6 |
| 2 | Microstructure Refinement of Mg-Gd-Y-Zr Alloy Under Pulsed Magnetic Field显示文摘The effects of pulsed magnetic field on the solidified microstructure of Mg-Gd-Y-Zr alloy were investigated.Fine uniform equiaxed grains are acquired in the whole ingot by the pulsed magnetic field treatment,and the average grain size of the as-castφ50 mm and 100φmm ingots is refined to 37μm and 47μm with the pulsed magnetic field.The macrosegregation of solute elements of Mg-Gd-Y-Zr alloy is also reduced by the pulsed magnetic field treatment.Structure refinement is due to the electromagnetic undercooling zone in front of the solid/liquid interface by the magnetic pressure,and reduction of temperature gradient by the vibration of melt resulted from the pulsed magnetic field,which increases the nucleation rate and prohibits dendrite growth.In addition,primaryα-Mg dendrites break into fine crystals,resulting in a refined solidification structure of the magnesium alloys.The Joule heat effect induced in the melt also strengthens the grain refinement effect and the spheroidization of dendrite arms. | WANG Bin YANG Yuan-sheng | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 6 |
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