李慎兰,黄昌龙,陈维平,黄志其

• 1:广州民航职业技术学院
• 2:华南理工大学机械与汽车工程学院
• 3:中南大学材料科学与工程学院

摘要(Abstract)：

采用分级淬火的实验方法,结合合金淬火态电导率和时效态硬度的测试拟合得到7003铝合金的时间-温度-转化率(TTT)曲线和时间-温度-性能(TTP)曲线,利用透射电镜(TEM)并结合Avrami方程研究了7003铝合金在等温过程中的组织变化。结果表明:当7003铝合金在相同温度下等温时,随保温时间延长,淬火态电导率呈上升趋势,时效态硬度呈下降趋势。透射电镜分析发现,在鼻温附近随保温时间的延长,晶粒内部析出相尺寸和间距变大,晶界析出相尺寸和间距变小,晶界无沉淀析出带变宽。实验用7003铝合金"C"曲线的鼻尖温度约为280℃,其孕育期约为10 s,淬火敏感温度区间较小,仅在鼻温附近淬火敏感性较高,而低温区和高温区淬火敏感性较低。实验用7003铝合金在线淬火时在鼻温附近应该以大于4℃/s的速度冷却,以抑制各种物相的析出。

关键词(KeyWords)： 7003铝合金;TTT曲线;TTP曲线;淬火敏感性

Abstract:

Keywords:

基金项目(Foundation): 2014年民航科技创新引导资金项目(MHRD20140320)

作者(Author): 李慎兰,黄昌龙,陈维平,黄志其

DOI: 10.13289/j.issn.1009-6264.2015.03.014

参考文献(References)：

• [1]Chakrabarti D J,Liu J,Sawtell R R,et al.New generation high strength high damage tolerance 7085 thick alloy product with low quench sensitivity[J].Materials Forum,2004,28:969-974.
• [2]LI Pei-yue,XIONG Bai-qing,ZHANG Yong-an,et al.Quench sensitivity and microstructure character of high strength AA7050[J].Transactions of Nonferrous Metals Society of China,2012,22(2):268-274.
• [3]刘胜胆,李承波,欧阳惠,等.超高强7000系铝合金的淬火敏感性[J].中国有色金属学报,2013,23(4):927-938.LIU Sheng-dan,LI Cheng-bo,OUYANG Hui,et al.Quench sensitivity of ultra-high strength 7000 series aluminum alloys[J].The Chinese Journal of Nonferrous Metals,2013,23(4):927-938.
• [4]刘胜胆,张新明,游江海,等.7055铝合金的TTP曲线及其应用[J].中国有色金属学报,2006,16(12):2034-2039.LIU Sheng-dan,ZHANG Xin-ming,YOU Jiang-hai,et al.TTP curve of 7055 aluminum alloy and its application[J].The Chinese Journal of Nonferrous Metals,2006,16(12):2034-2039.
• [5]刘胜胆,张新明,游江海,等.微量锆对7055型铝合金淬火敏感性的影响[J].稀有金属材料与工程,2007,36(4):607-611.LIU Sheng-dan,ZHANG Xin-ming,YOU Jiang-hai,et al.Influence of trace Zr on quench sensitivity of 7055 type aluminum alloy[J].Rare Metal Materials and Engineering,2007,36(4):607-611.
• [6]张新明,刘文军,刘胜胆,等.7050铝合金的TTP曲线[J].中国有色金属学报,2009,19(5):861-868.ZHANG Xin-Ming,LIU Wen-jun,LIU Sheng-dan,et al.TTP curve of aluminum alloy 7050[J].The Chinese Journal of Nonferrous Metals,2009,19(5):861-868.
• [7]张新明,刘胜胆,游江海,等.时效对7055铝合金淬火敏感效应的影响[J].中国有色金属学报,2007,17(2):260-264.ZHANG Xin-ming,LIU Sheng-dan,YOU Jiang-hai,et al.Influence of aging on quench sensitivity effect of 7055 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2007,17(2):260-264.
• [8]李培跃,熊柏青,张永安,等.7050铝合金淬火特性与微观组织[J].中国有色金属学报,2011,21(3):513-521.LI Pei-yue,XIONG Bai-qing,ZHANG Yong-an,et al.Hardenability characteristic and microstructure of 7050 Al alloy[J].The Chinese Journal of Nonferrous Metals,2011,21(3):513-521.
• [9]Dorward R C.A dynamic quench model for strength predictions in heat-treatable aluminum alloys[J].Journal of Materials Processing Technology,1997,6(1/3):25-29.
• [10]Robinson J S,Cudd R L,Tsnner D A.Quench sensitivity and tensile property in homogenity in 7010 forgings[J].Journal of Materials Processing Technology,2001,119(1/3):261-267.
• [11]LI H Y,GENG J F,ZHENG Z Q,et al.Continuous cooling transformation curve of a novel Al-Cu-Li alloy[J].Transactions Nonferrous Metals Society of China,2006,16(5):1110-1115.
• [12]李红英,唐宜,曾再得,等.Al-Zn-Mg-Cu合金连续冷却转变曲线的测量[J].中国有色金属学报,2008,18(9):1613-1621.LI Hong-ying,TANG Yi,ZENG Zai-de,et al.Testing of continuous cooling transformation curve of Al-Zn-Mg-Cu alloy[J].The Chinese Journal of Nonferrous Metals,2008,18(9):1613-1621.
• [13]HUANG Z Q,ZHOU X,YIN Z M,et al.Research on the quench sensitivity of aluminum alloys used for rail vehicle[J].Light Metal Age,2012,70:46-53.
• [14]肖纪美.合金相与相变[M].冶金工业出版社,北京:2004,310-312.
• [15]Porter D A,Easterling K E.Phase Transformations in Metals and Alloys[M].London:Chapman&Hall Press,1992.
• [16]SHANG B C,YIN Z M,WANG G,et al.Investigation of quench sensitivity and transformation kinetics during isothermal treatment in 6082 aluminum alloy[J].Materials and Design,2011,32(7):3818-3822.
• [17]Staley J T.Quench factor analysis of aluminum alloys[J].Materials Science and Technology,1987,3(11):923-935.
• [18]Evancho J W,Staley J T.Kinetics of precipitation in aluminum alloys during continuous cooling[J].Metallurgical Transactions,1974,5(1):43-47.

文章评论(Comment)：