7A04高强铝合金的热拉深性能
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摘要
采用模内加热的方式,比较不同加热温度时,在不同工艺条件下0.8 mm厚7A04板料的拉深成形能力,研究7A04高强铝合金板材在热成形条件下的拉深性能。结果表明:随着温度的升高,材料的成形性能得到显著提高,在350~400℃温度区间,极限拉深尺寸达到最大值,相较于常温下的极限拉深直径提高8.8%,拉深件高度提高28.57%。由于加热时间短,不同温度成形材料的相应组织和硬度无明显变化,热拉深后材料仍保持原高强铝合金强度高的特性。
The drawing abilities of sheet metal under different process conditions were compared by using the mould of internal heating at different heating temperatures. The drawing properties of 7 A04 high strength aluminum alloy under the condition of hot forming were studied. The results show that with the increase of temperature, the formability of the material is significantly improved, and the limit drawing size reaches the maximum value at 350-400 ℃, and it is increased by 8.8% compared to that at the normal temperature. The height of drawing part increases by 28.57%. Due to the short heating time, there are no obvious changes of microstructure and hardness in different temperature forming materials. And it still keeps the characteristics of high strength after hot drawing.
The drawing abilities of sheet metal under different process conditions were compared by using the mould of internal heating at different heating temperatures. The drawing properties of 7 A04 high strength aluminum alloy under the condition of hot forming were studied. The results show that with the increase of temperature, the formability of the material is significantly improved, and the limit drawing size reaches the maximum value at 350-400 ℃, and it is increased by 8.8% compared to that at the normal temperature. The height of drawing part increases by 28.57%. Due to the short heating time, there are no obvious changes of microstructure and hardness in different temperature forming materials. And it still keeps the characteristics of high strength after hot drawing.
引文
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[2]李传福,张丽萍.浅谈铝合金材料在未来汽车轻量化中的应用与发展[J].装备制造技术,2015(4):143-145.LI Chuan-fu,ZHANG Li-ping.Discussion on the aluminum alloy materials in automotive lightweight application and development in the future[J].Equipment Manufacturing Technology,2015(4):143-145.
[3]陈婕尔,王孟君,杨刚,周威,李光耀.汽车用5182铝合金板温冲压实验研究及数值模拟[J].中国有色金属学报,2012,22(12):3342-3347.CHEN Jie-er,WANG Meng-jun,YANG Gang,ZHOU Wei,LI Guang-yao.Experimental study and numerical simulation of warm stamping of 5182 aluminum alloy for automotive body[J].The Chinese Journal of Nonferrous Metals,2012,22(12):3342-3347.
[4]ZHOU Jing,WANG Bao-yu,LIN Jian-guo,MA Wen-yu.Forming defects in aluminum alloy hot stamping of side-door impact beam[J].Transactions of Nonferrous Metals Society of China,2014,24(11):3611-3620.
[5]周国伟,李大永,彭颖红.7075-T6高强度铝合金温热条件下的拉深成形性能[J].上海交通大学学报,2012,46(9):1482-1486.ZHOU Guo-wei,LI Da-yong,PENG Yin-hong.Deep drawability of 7075-T6 high strength aluminum alloy at warm condition[J].Journal of Shanghai Jiao Tong University,2012,46(9):1482-1486.
[6]秦清风,谭迎新,杨勇彪,张治民.7A04铝合金车轮半成品热变形行为研究[J].轻合金加工技术,2016,44(4):51-57.QIN Qing-feng,TAN Ying-xin,YANG Yong-biao,ZHANG Zhi-min.Hot deformation behavior of semi-finished wheel rims of 7A04 aluminum alloy[J].Light Alloy Fabrication Technology,2016,44(4):51-57.
[7]魏斌.7075铝合金高温固态-半固态组织演变及变形行为研究[D].哈尔滨:哈尔滨工业大学,2015.WEI Bin.Research on microstructure evolution and deformation behavior of 7075 aluminum alloy in high temperature solid and semi-solid state[D].Harbin:Harbin Institute of Technology,2015.
[8]杨琳,樊奇,曹晓卿,王文先.镁/铝合金双金属叠层板的拉深性能[J].中国有色金属学报,2014,24(9):2213-2219.YANG Lin,FAN Qi,CAO Xiao-qin,WANG Wen-xian.Deep draw ability of Mg/Al bimetal laminated sheet[J].The Chinese Journal of Nonferrous Metals,2014,24(9):2213-2219.
[9]苌群峰,李大永,彭颖红,曾小勤.AZ31镁合金盒形件变压边力温热拉延工艺[J].中国机械工程,2006,17:16-18.CHANG Qun-feng,LI Da-yong,PENG Ying-hong,ZENG Xiao-qin.Warm deep drawing of square parts of AZ31magnesium alloy sheet adopting variable blank holder force[J].China Mechanical Engineering,2006,17:16-18.
[10]杜雪林,曹阳根,陈远怀,杨尚磊,邓沛然.不同冲压速率的DP780杯突试验[J].塑性工程学报,2014(5):15-18.DU Xue-lin,CAO Yang-gen,CHEN Yuan-huai,YANG Shang-lei,DENG Pei-ran.DP780 eriehsen test under different deformation rates[J].Journal of Plasticity Engineering,2014(5):15-18.
[11]张志超,徐永超,苑世剑.5A06铝合金中厚板的拉深变形行为[J].中国有色金属学报,2015,25(7):1764-1772.ZHANG Zhi-chao,XU Yong-chao,YUAN Shi-jian.Deformation behavior of deep drawing of 5A06 aluminum alloy plate[J].The Chinese Journal of Nonferrous Metals,2015,25(7):1764-1772.
[12]李文娟.AZ31B镁合金板料成形性能研究[D].济南:山东大学,2012.LI Wen-juan.Study on formability of AZ31B magnesium alloy sheet[D].Ji’nan:Shandong University,2012.
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[14]胡冬生.高强铝合金复合温挤压成形与微弧氧化处理工艺研究[D].广州:华南理工大学,2013.HU Dong-sheng.Study on the forming of high strength aluminum alloy by warm extrusion and the processing technology of micro arc oxidation[D].Guangzhou:South China University of Technology,2013.
[15]赵长财,曹秒艳,肖宏,董国疆,郝海滨.镁合金板材的固体颗粒介质拉深工艺参数[J].中国有色金属学报,2012,22(4):991-999.ZHAO Chang-cai,CAO Miao-yan,XIAO Hong,DONG Guo-jiang,HAO Hai-bin.Solid granular medium drawing process parameters of magnesium alloy sheet[J].The Chinese Journal of Nonferrous Metals,2012,22(4):991-999.
[16]刘倩.成形速度对B340/590DP板料冲压成形性能影响的研究[D].武汉:华中科技大学,2013.LIU Qian.Effect of forming speed on the formability of B340/590DP sheet metal forming[D].Wuhan:Huazhong University of Science and Technology,2013.
[17]王卫卫.材料成形设备[M].北京:机械工业出版社,2011.WANG Wei-wei.Material forming equipment[M].Beijing:China Machine Press,2011.
[18]杨海虹,胡兴华,王少华,冯朝辉.7085铝合金锻件强度、硬度和电导率关系研究[J].铝加工,2012(4):37-40.YANG Hai-hong,HU Xing-hua,WANG Shao-hua,FENG Zhao-hui.Study on relationship of strength,hardness and electrical conductivity of 7085 aluinum alloy forings[J].Aluminium Fabrication,2012(4):37-40.
[19]符师桦.合金中锯齿形屈服现象的实验和理论研究[D].合肥:中国科学技术大学,2013.FU Shi-hua.Experimental and theoretical investigations on serrated yielding phenomenon in alloys[D].Hefei:University of Science and Technology of China,2013.
[20]彭开萍,陈嘉亮,陈文哲,钱匡武.易拉罐用铝材的锯齿屈服现象[J].中国有色金属学报,2005,15(5):694-699.PENG Kai-ping,CHEN Jia-liang,CHEN Wen-zhe,QIAN Kuang-wu.Serration flow phenomenon of aluminum alloy used for can body stock[J].The Chinese Journal of Nonferrous Metals,2005,15(5):694-699.