动车组用铝合金传动盘锻造组织和各向异性研究
|
摘要
为提高动车组的动力学性能,轻量化是一条必由之路.将空心轴两端的传动盘零件用高强7050铝合金替代35钢,将大幅度减轻车辆的簧下质量.而采用铝合金锻造工艺需要克服的最大难点是力学性能的各向异性.文章研究了减小高强铝合金传动盘各向异性的加工方法.结果表明,采用"预先挤压+墩粗"及"径向拔长自由锻造+两级时效"处理的工艺路线,获得了各向异性较小的7050铝合金传动盘锻件.
Lightweighting is the most profitable trail to take in improving the dynamic performance of EMU.The replacement of 35 steel with a high-strength 7050 aluminum alloy on the transmission disc parts at both ends of the hollow shaft will substantially reduce the unsprung weight of the vehicle.The biggest difficulty that needs to be overcome when using aluminum alloy forging process is the anisotropy of mechanical properties.For this reason,this paper studies the processing method for reducing the anisotropy of the high-strength aluminum alloy drive plate.The results show that the forgings of 7050 aluminum alloy drive plate with smaller anisotropy are obtained by adopting the process route of'pre-extrusion+piercing'and'free radial forging+two-stage aging treatment'.
Lightweighting is the most profitable trail to take in improving the dynamic performance of EMU.The replacement of 35 steel with a high-strength 7050 aluminum alloy on the transmission disc parts at both ends of the hollow shaft will substantially reduce the unsprung weight of the vehicle.The biggest difficulty that needs to be overcome when using aluminum alloy forging process is the anisotropy of mechanical properties.For this reason,this paper studies the processing method for reducing the anisotropy of the high-strength aluminum alloy drive plate.The results show that the forgings of 7050 aluminum alloy drive plate with smaller anisotropy are obtained by adopting the process route of'pre-extrusion+piercing'and'free radial forging+two-stage aging treatment'.
引文
[1]森久史.满足轻量化的铁道车辆用轻质新材料[J].国外铁道车辆,2017,54(3):12-15.
[2]李呈祥,王波.“中国制造2025”之先进的轨道交通装备制造[J].焊接与切割,2016(2):28-31.
[3]过福权.铝合金在铁道车辆上的应用探讨[J].中国金属通报,2011(3):42-43.
[4]梁君海,金泰木.车下水箱组成轻量化及集成化设计[J].机车车辆工艺,2007(2):40-42.
[5]姚曙光,许平.新材料在高速客车上的应用[J].铁道机车车辆,2002(3):24-26.
[6]牟少弟,李智国,李乐营.新型轻量化行李架研究[J].沿海企业与科技,2012(12):13-16.
[7]唐永明.“先锋号”电动车组转向架一系簧下轻量化研究[J].铁道机车车辆,2004,24:43-45.
[8]刘仁民.高速客车车体、转向架轻量结构设计的材料选择和制造工艺问题的探讨[J].铁道车辆,1994(3):4-6.
[9]杜子学,李吉慧,朱兴高.跨坐式单轨车辆转向架构架的轻量化研究[J].城市轨道交通,2012(11):58-60.
[10]张红军,黄成荣,陈国胜,等.高速列车转向架技术[J].机车电传动,2004(3):1-4.
[11]周国伟,李大永,彭颖红.T6态7075铝合金温热下各向异性研究[J].精密成形工程,2011,3(6)9-12:
[12]郭加林,尹志民,商宝川,等.2524铝合金薄板平面各向异性研究[J].航空材料学报,2009,29(1):1-6.
[13]SONG F X,ZHANG X M,LIU S D,et al.Anisotropy of localized corrosion in 7050-T7451Al alloy thick plate[J].Transactions of Nonferrous Metals Society of China,2013,23(9):2483-2490.
[14]甘卫平,杨志强,王慧敏.7475铝合金断裂韧性K Ic的各向异性[J].轻合金加工技术,2002,30(3):43-46.
[2]李呈祥,王波.“中国制造2025”之先进的轨道交通装备制造[J].焊接与切割,2016(2):28-31.
[3]过福权.铝合金在铁道车辆上的应用探讨[J].中国金属通报,2011(3):42-43.
[4]梁君海,金泰木.车下水箱组成轻量化及集成化设计[J].机车车辆工艺,2007(2):40-42.
[5]姚曙光,许平.新材料在高速客车上的应用[J].铁道机车车辆,2002(3):24-26.
[6]牟少弟,李智国,李乐营.新型轻量化行李架研究[J].沿海企业与科技,2012(12):13-16.
[7]唐永明.“先锋号”电动车组转向架一系簧下轻量化研究[J].铁道机车车辆,2004,24:43-45.
[8]刘仁民.高速客车车体、转向架轻量结构设计的材料选择和制造工艺问题的探讨[J].铁道车辆,1994(3):4-6.
[9]杜子学,李吉慧,朱兴高.跨坐式单轨车辆转向架构架的轻量化研究[J].城市轨道交通,2012(11):58-60.
[10]张红军,黄成荣,陈国胜,等.高速列车转向架技术[J].机车电传动,2004(3):1-4.
[11]周国伟,李大永,彭颖红.T6态7075铝合金温热下各向异性研究[J].精密成形工程,2011,3(6)9-12:
[12]郭加林,尹志民,商宝川,等.2524铝合金薄板平面各向异性研究[J].航空材料学报,2009,29(1):1-6.
[13]SONG F X,ZHANG X M,LIU S D,et al.Anisotropy of localized corrosion in 7050-T7451Al alloy thick plate[J].Transactions of Nonferrous Metals Society of China,2013,23(9):2483-2490.
[14]甘卫平,杨志强,王慧敏.7475铝合金断裂韧性K Ic的各向异性[J].轻合金加工技术,2002,30(3):43-46.