AA6061铝合金正方形截面管胀形工艺研究

中国机械工程

AA6061铝合金正方形截面管胀形工艺研究

毕江1,2;赵长财1;杜冰1;陈晓华1;董国疆3

1.燕山大学先进锻压成形技术与科学教育部重点实验室，秦皇岛，066004
2.哈尔滨工业大学先进焊接与连接国家重点实验室，哈尔滨，150001
3.燕山大学车辆与能源学院，秦皇岛，066004

出版日期:2017-06-25 发布日期:2017-06-22
基金资助:
国家自然科学基金资助项目(51305386,51305385);
河北省自然科学基金资助项目(E2013203093)

Research on Bulging Technology of AA6061 Aluminum Alloy Tubes with Square Cross Sections

BI Jiang1, 2;ZHAO Changcai1;DU Bing1;CHEN Xiaohua1;DONG Guojiang3

1.Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education,Yanshan University,Qinhuangdao,Hebei,066004
2.State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin, 150001
3.School of Vehicles and Energy,Yanshan University,Qinhuangdao,Hebei,066004

Online:2017-06-25 Published:2017-06-22

摘要/Abstract

摘要： AA6061铝合金挤压管材在常温下强度高但塑性差，难以成形复杂形状零件。基于此，提出了固溶处理+固体颗粒介质胀形+人工时效的工艺流程，通过固溶、淬火和时效等热处理工艺调整铝合金变形前后的力学性能，应用固体颗粒介质胀形技术实现管件塑性成形。以AA6061挤压铝合金管为研究对象，分析了固溶处理工艺参数对合金力学性能的影响，发现管材经固溶温度560℃且保温120min处理后，其延伸率提高3倍以上，强度和硬度也大幅降低，使合金管材的成形性能指标显著提高，具备了固体颗粒介质胀形管件的条件;对合金固溶处理后再人工时效处理的试验研究表明，人工时效温度180℃且保温360min时合金塑性下降，强度和硬度等性能指标均可恢复至初始状态。基于铝合金热处理工艺特征的研究，采用固溶处理+固体颗粒介质胀形+时效处理的工艺流程，成功试制了AA6061铝合金典型的正方形截面管件，其环向最大展长率可达34%。

关键词: 铝合金管材, 固溶处理, 时效处理, 固体颗粒介质胀形

Abstract: The AA6061 aluminum alloy extruded tube might not be formed into complex parts for its high strength and poor plasticity at room temperature. This paper put forward a new technological process: including solution treatment+solid granule medium bulging+aging treatment. During the processes, the mechanics properties of the tested alloy could be changed by heat treatments to satisfy the process requirements and the processing method of high strength aluminum alloy also could be realized by solid granule medium bulging technology. The AA6061 extruded tubes were investigated to show the effects of solution treatments on mechanics properties. At a solution temperature of 560℃ and time of 120min, the elongations of AA6061 aluminum alloy tubes increase by 300%, the strength and the hardness decrease dramatically too. Therefore, the AA6061 aluminum alloy tubes meet the requirements of bulging by the improvements of formability. The experiments show that the strengths and hardnesses of AA6061 aluminum alloy workpieces recover to the as-received alloy at an aging temperature of 180℃ and time of 360min. The typical tubes with square cross sections were trial-produced in lab by using the present forming method. The forming tests show that, the percentage elongation of AA6061 aluminum alloy tubes in ring direction may reach 34%.

Key words: aluminum alloy tube, solution treatment, aging treatment, solid granule medium bulging

中图分类号:

TG306

毕江, 赵长财, 杜冰, 陈晓华, 董国疆. AA6061铝合金正方形截面管胀形工艺研究[J]. 中国机械工程.

BI Jiang, , ZHAO Changcai, DU Bing, CHEN Xiaohua, DONG Guojiang. Research on Bulging Technology of AA6061 Aluminum Alloy Tubes with Square Cross Sections[J]. China Mechanical Engineering.

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