流变压铸AlSi9Mg合金的热处理工艺Heat treatment process of AlSi9Mg alloy produced by rheo-diecasting
谭建波,侯文杰
摘要(Abstract):
利用自行研制的振动频率可调的倾斜冷却剪切实验装置制备半固态AlSi9Mg合金熔体,并与传统高压铸造工艺衔接,直接进行流变压铸,运用正交试验方法研究了固溶处理温度、保温时间、水淬介质温度对流变压铸试样抗拉强度的影响。结果表明:固溶处理温度为535℃,保温时间4 h,水温60℃,并经175℃×8 h人工时效后,流变压铸件的σb=277 MPa,δ=3.9%。流变压铸可实现低固相率半固态AlSi9Mg合金熔体的低气孔率压铸。与压力铸造相比,流变压铸可提高铸件的致密性和力学性能,伸长率提高尤为明显。
关键词(KeyWords): 流变压铸;固溶处理;AlSi9Mg合金;组织
基金项目(Foundation): 河北省自然科学基金(E2010000880);; 河北科技大学博士基金项目(QD200901)
作者(Author): 谭建波,侯文杰
DOI: 10.13289/j.issn.1009-6264.2010.12.007
参考文献(References):
- [1]郭洪民,杨湘杰.流变压铸YL112铝合金的微观组织特征[J].中国有色金属学报,2008,18(3):400-408.GUO Hong-min,YANG Xiang-jie.Microstructures characteristics of YL112 aluminum alloy produced by rheo-diecasting process[J].The ChineseJournal of Nonferrous Metals,2008,18(3):400-408.
- [2]FAN Z.Development of the rheo-diecasting process for magnesium alloys[J].Mater Sci Eng A,2005,413-414:72-78.
- [3]Midson S P.Rheocasting processes for semi-solid casting of aluminum a11oy[J].Die Casting Engineer,2006,50(1):48-51.
- [4]杨柳青,康永林,张帆,等.A357铝合金半固态流变压铸成形组织工艺研究[J].材料工程,2009(6):64-66.YANG Liu-qing,KANG Yong-lin,ZHANG Fan,et al.Study on microstructure processing relationship of a semi solid rheo-diecasting A357aluminum alloy[J].Journal of Materials Engineering,2009(6):64-66.
- [5]肖泽辉.镁合金半固态流变压铸成形技术的研究[D].华中科技大学,2005:4-6.
- [6]张恒华,许珞萍,邵光杰,等.AlSi7Mg合金半固态压铸件热处理强化机理研究[J].材料热处理学报,2003,24(2):62-65.ZHANG Heng-hua,XU Luo-ping,SHAO Cuang-jie,et al.Study on the heat treatment strengthening of semi solid die casting of A1Si7Mg alloy[J].Transaction of Materials and Heat Treatment,2003,24(2):62-65.
- [7]谭建波,李志勇,王英杰,等.倾斜冷却剪切流变参数对AlSi9Mg组织的影响[J].中国有色金属学报,2009,19(4):607-612.TAN Jian-bo,LI Zhi-yong,WANG Ying-jie,et al.Effect of rheocasting by incline cooling and shearing on microstructures of semi-solid AlSi9Mg[J].The Chinese Journal of Nonferrous Metals,2009,19(4):607-612.
- [8]中国机械工程学会铸造分会.铸造手册(铸造非铁合金)[M].北京:机械工业出版社,2006:103.
文章评论(Comment):
|
||||||||||||||||||
|
||||||||||||||||||