感应加热工艺对6061-T6铝合金显微组织与硬度的影响

doi:10.13251/j.issn.0254-6051.2025.10.038

金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 237-242.DOI: 10.13251/j.issn.0254-6051.2025.10.038

感应加热工艺对6061-T6铝合金显微组织与硬度的影响

马冬威^1,2, 谭永星¹, 何超^1,2, 陈祥^1,2, 赵齐^1,2, 张春^1,2,3

1.湖北汽车工业学院材料科学与工程学院, 湖北十堰 442002;
2.先进车用铝合金材料十堰市重点实验室(湖北汽车工业学院), 湖北十堰 442002;
3.湖北省汽车零部件轻量化技术转化中试研究基地, 湖北十堰 442002

收稿日期:2025-04-28 修回日期:2025-08-15 出版日期:2025-10-25 发布日期:2025-11-04
作者简介:马冬威(1983—),男,高级实验师,主要研究方向为金属材料强韧化、表面处理及失效分析,E-mail: madongwei107@163.com
基金资助:
湖北省教育厅科学技术研究计划重点项目(D20231804);湖北省技术创新专项(重大项目)(2023BEB023)

Effect of induction heating process on microstructure and hardness of 6061-T6 aluminum alloy

Ma Dongwei^1,2, Tan Yongxing¹, He Chao^1,2, Chen Xiang^1,2, Zhao Qi^1,2, Zhang Chun^1,2,3

1. School of Materials and Engineering, Hubei University of Automotive Technology, Shiyan Hubei 442002, China;
2. Shiyan Key Laboratory of Advanced Automotive Aluminum Alloy (Hubei University of Automotive Technology), Shiyan Hubei 442002, China;
3. Hubei Technological Transformation & Pilot Research Base for Lightweight of Automotive Parts and Components, Shiyan Hubei 442002, China

Received:2025-04-28 Revised:2025-08-15 Online:2025-10-25 Published:2025-11-04

摘要/Abstract

摘要： 针对T6态6061铝合金管材接头部位在磁脉冲焊接、爆炸焊接等加工过程中变形抗力大,难以成型的问题,通过扫描电镜、能谱仪、光学显微镜、显微硬度计等分析手段,研究了感应加热工艺对T6态6061铝合金管材显微组织与硬度的影响。结果表明,感应加热后,6061-T6铝合金中不规则块状粗大第二相的数量和形态没有发生明显变化,细小的第二相质点数量明显增多,并主要沿晶界分布。随着感应加热时间的延长,合金再结晶程度增加,基体中弥散分布的细小第二相质点数量增多。加热时间过长时(达到12.5 s),合金出现晶粒粗大,晶界宽化等过热现象。感应加热后,距管材上端越近的部位,硬度值越低,感应加热时间越长,相同部位的硬度值越低。当感应加热功率为52 kW、频率为7.5 kHz、时间为10.5 s时,6061铝合金管材的硬度可以满足焊接工艺要求。

关键词: 6061-T6铝合金, 感应加热, 显微组织, 硬度

Abstract: Aiming at the problem that large deformation resistance of T6 state 6061 aluminum alloy pipe joint leading to the difficulty of forming in the process of magnetic pulse welding, explosive welding, the effect of induction heating process on the microstructure and hardness of the T6 state 6061 aluminum alloy pipe was studied by means of SEM, EDS, optical microscope and microhardness tester. The results show that after induction heating, the number and morphology of irregular massive coarse second phases in the 6061-T6 aluminum alloy do not change significantly, and the number of fine second phase particles increases significantly, which are mainly distributed along grain boundaries. With the extension of induction heating time, the degree of recrystallization of the alloy increases, and the number of fine second phase particles dispersed in the matrix increases. When the heating time is too long (up to 12.5 s), the alloy appears overheating phenomena such as coarse grain and grain boundary widening. After induction heating, the closer to the upper end of the pipe, the lower the hardness value, and the longer the induction heating time, the lower the hardness value at the same position. When the induction heating power is 52 kW, the frequency is 7.5 kHz and the time is 10.5 s, the hardness of the 6061 aluminum alloy pipe can meet the requirements of welding process.

Key words: 6061-T6 aluminum alloy, induction heating, microstructure, hardness

中图分类号:

TG146.2

马冬威, 谭永星, 何超, 陈祥, 赵齐, 张春. 感应加热工艺对6061-T6铝合金显微组织与硬度的影响[J]. 金属热处理, 2025, 50(10): 237-242.

Ma Dongwei, Tan Yongxing, He Chao, Chen Xiang, Zhao Qi, Zhang Chun. Effect of induction heating process on microstructure and hardness of 6061-T6 aluminum alloy[J]. Heat Treatment of Metals, 2025, 50(10): 237-242.

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感应加热工艺对6061-T6铝合金显微组织与硬度的影响

Effect of induction heating process on microstructure and hardness of 6061-T6 aluminum alloy

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