2A12铝合金喷射沉积坯的形状控制及显微组织
Shape Control and Microstructure of Spray Deposited Billets of 2A12 Aluminum Alloy
摘 要
通过运用自主研发的两种(双辊和四辊)流型控制器, 在不同条件下制备了2A12铝合金喷射沉积坯, 观察了沉积坯的形状及显微组织, 获得最适合的工艺。结果表明: 经四辊流型控制器控制沉积后, 可得到宽度较窄(约20 mm)、截面呈明显高斯分布的沉积坯, 基本满足喷射沉积与连续挤压的几何尺寸匹配; 且晶粒为球状, 晶粒尺寸比自由喷射沉积时明显减小; 采用四辊流型控制器控制沉积时, 最适合的雾化气体压力为0.3 MPa。
快速凝固
沉积坯
晶粒尺寸
spray continuous extrusion
rapidly solidification
deposited billet
grain size
Abstract
The deposited billets of 2A12 aluminum alloy using two self-developed flow controllers (two-roller and four-roller), and the shapes and microstructure of deposited billets were observed to get the most suitable process. The results show that a deposited billet in narrow width about 20 mm and showing obvious Gaussian distribution on the cross-section was achieved using four-roller flow controller. The deposited billet satisfied the size matching between spray deposition and continuous extrusion. The grains of deposited billets were spherical and decreased in grain size compared to free spray. The most suitable atomizing gas pressure was 0.3 MPa in deposition process using four-roller flow controller.
中图分类号 TG146 DOI 10.11973/jxgccl201508004
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50874055); 云南省自然科学基金资助项目(2007E0013Z)
收稿日期 2014/3/21
修改稿日期 2015/5/3
网络出版日期
作者单位点击查看
备注郑大亮(1989-), 男, 河南新乡人, 硕士研究生。
引用该论文: ZHENG Da-liang,GAO Peng,YIN Jian-cheng,LIU Ying-li,WANG Yu-feng,ZHONG Yi. Shape Control and Microstructure of Spray Deposited Billets of 2A12 Aluminum Alloy[J]. Materials for mechancial engineering, 2015, 39(8): 22～25
郑大亮,高鹏,尹建成,刘英莉,王宇锋,钟毅. 2A12铝合金喷射沉积坯的形状控制及显微组织[J]. 机械工程材料, 2015, 39(8): 22～25
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参考文献
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【6】GRANT P S. Solidification in spray forming ［J］. Metallurgical and Materials Transactions: A, 2007, 38(7): 1520-1529.
【7】CAI W D, SMUGERESKY J, LAVERNIA E J. Low-pressure spray forming of 2024 aluminum alloy［J］. Materials Science and Engineering: A, 1998, 241: 60-71.
【8】KUDASHOV D V, ZAUTER R, MULLER H R. Spray-formed high-aluminium bronzes［J］. Materials Science and Engineering: A, 2008, 477: 43-49.
【9】SALAMCI E. Directionality in the mechanical properties of spray cast and extruded 7XXX series aluminium alloys［J］. Turkish J Eng Env Sci, 2003,27: 169-176.
【10】徐寒冰, 吴建生, 章靖国.喷射成形技术发展及其工业应用［J］.机械工程材料, 1999,23(12): 1-5.
【11】陈志刚, 陈振华, 王振生, 等. 喷射沉积大尺寸A356铝合金管坯的组织与性能［J］. 机械工程材料, 2011, 35(8): 44-47.
【12】张永安, 熊柏青, 韦强, 等. 喷射成形制备高性能铝合金材料［J］. 机械工程材料, 2001, 25(4): 22-25.
【13】陈飞凤, 严红革, 陈振华, 等. 外框限制轧制工艺在喷射沉积板坯加工中的应用［J］. 机械工程材料, 2007, 31(2): 19-22.
【14】PAYNE R D, MATTESON M A, MORAN A L. Application of neural networks in spray forming technology［J］. Inter J Powder Metall, 1993, 29(4): 345-347.
【15】马万太, 张豪, 张捷, 等. 喷射沉积铝合金管坯工业化生产中的控制系统研究［J］. 粉末冶金技术, 2006(6): 421-426.
【16】曲迎东, 崔成松, 曹福洋, 等. 喷射沉积坯体特征尺寸的神经网络模型建立与仿真［J］. 材料工程, 2005, 29(8): 15-19.
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