形变时效处理对铝合金电工圆杆抗拉强度和导电率的影响
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摘要
探究不同变形量形变热处理对铝电工圆杆导电率及抗拉强度的影响。结果表明,随着轧制变形量的增加,试样的导电率先增加后降低,其抗拉强度得到较大的提升。形变时效后,试样的晶界薄化,组织更加均匀,基体中第二相粒子的含量增加,且出现新相SiB_6、Al_(3.21)Si_(0.47)、Cu_3Fe_(17)、Al_2FeSi。通过"535℃×5h固溶处理+83%轧制+190℃×10h时效"的形变热处理后,试样抗拉强度达到234MPa的峰值,导电率为53.45%IACS。
Effect of deformation aging treatment on conductivity and tensile strength of electrical round aluminum rod was explored.The results show that with increase of rolling deformation,electrical conductivity first rises and then drops,and tensile strength is improved obviously.After deformation aging treatment,grain boundary of samples becomes thinner,and microstructure is more uniform and welldistributed.The second phases of specimen rise visibly,and new phases(SiB_6,Al_(3.21)Si_(0.47),Cu_3Fe_(17),and Al_2FeSi)exist in matrix.Tensile strength and electrical conductivity is 234 MPa and 53.45%IACS respectively under thermo-mechanical treatment of 535 ℃×5h solid solution treatment,rolling(83%),and 190 ℃×10h aging treatment.
Effect of deformation aging treatment on conductivity and tensile strength of electrical round aluminum rod was explored.The results show that with increase of rolling deformation,electrical conductivity first rises and then drops,and tensile strength is improved obviously.After deformation aging treatment,grain boundary of samples becomes thinner,and microstructure is more uniform and welldistributed.The second phases of specimen rise visibly,and new phases(SiB_6,Al_(3.21)Si_(0.47),Cu_3Fe_(17),and Al_2FeSi)exist in matrix.Tensile strength and electrical conductivity is 234 MPa and 53.45%IACS respectively under thermo-mechanical treatment of 535 ℃×5h solid solution treatment,rolling(83%),and 190 ℃×10h aging treatment.
引文
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[2]王天资,巫瑞智,张景怀,等.铝导电材料的研究进展[J].材料科学与工艺,2014,22(6):53-61.
[3]KRISTIAN B P,DAVID B,PETER K K,et al.Interface structure and strength of ultrasonically wedge bonded heavy aluminium wires in Si-based power modules[J].J Mater Sci:Mater Electron,2014,25:2863-2871.
[4]MCALLEN P,PHELAN P.Ductile fracture by central bursts in drawn 2011aluminium wire[J].International Journal of Fracture,2005,135:19-33.
[5]韩钰,刘东雨,夏延秋.稀土微合金化对铝合金导电性和耐热性影响的研究[J].热加工工艺,2014,43(14):28-31.
[6]李文浩,徐睿,刘斌.用于大跨越的高强度耐热铝合金导线的研制[J].电线电缆,2008(1):21-25.
[7]李红英,孙远,宾杰,等.Ce对耐热铝导体材料铸态组织和性能的影响[J].中南大学学报(自然科学版),2011,42(10):3026-3032.
[8]刘竞艳,许飞,苗壮.富铈混合稀土对Al-4.5Cu合金微观组织和力学性能的影响[J].稀有金属材料与工程,2011,40(增刊2):573-576.
[9]刘东雨,李文杰,韩钰,等.高电导率耐热铝合金导体材料的合金设计[J].材料热处理学报,2014,35(增刊1):17-21.
[10]MANDAL R K,MANDAL A,MISRA D K,et al.Indentation Characteristics Of Rapidly Solidified AlCu-V And Al-Cu-Ti Alloys[J].Trans.Indian Inst.Met.,2008,61:7-12.
[11]刘东雨,刘静静,侯世香,等.耐热铝合金导线的发展[J].热处理技术与装备,2013,34(3):1-6.
[12]张世兴,蔡刚毅,王鹏辉.形变热处理工艺条件对7075铝合金组织及性能影响[J].轻合金加工技术,2011,39(6):60-63.
[13]钞润泽,管西花,管仁国,等.合金成分对铝导线力学性能与导电性能的影响[J].中国有色金属学报,2014,24(4):3164-3169.
[14]姚洪瀚.7050铝合金一种新型形变热处理工艺研究[D].哈尔滨:哈尔滨工业大学,2013.
[15]尤传永.耐热铝合金导线的耐热机理及其在输电线路中的应用[J].电线电缆,2003,24(4):3-8.
[16]秦兴国,吴玉程,黄新民,等.稀土元素对高强高导铝合金的性能影响[J].金属功能材料,2010,17(6):17-21.
[17]吴璐,董万鹏,龚红英,等.铝合金的形变热处理研究进展[J].热加工工艺,2014(4):27-31.
[18]陈文平.高性能稀土铝合金导体材料研究[D].合肥:合肥工业大学,2013.
[19]马玉龙,张晓燕,黄鑫,等.微合金元素对Al-B电工圆杆性能的影响[J].有色金属(冶炼部分),2015(8):59-61.
[20]王荣莉,何正夫,王如意,等.电工圆铝杆物理性能检测准确性探讨[J].有色金属加工,2010,39(2):13-15.