| SPCC钢与NdFeB永磁体的激光点焊 |
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| 引用本文： | 常保华,白少俊,LI Xiaogang,DING Yuquan,张骅,都东,ZHOU Yunhong.SPCC钢与NdFeB永磁体的激光点焊[J].清华大学学报(自然科学版),2008,48(11). |
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| 作者姓名： | 常保华 白少俊 LI Xiaogang DING Yuquan 张骅 都东 ZHOU Yunhong |
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| 作者单位： | 1. 清华大学,机械工程系,先进成形制造教育部重点实验室,北京,100084,中国
2. 滑铁卢大学机械工程系,滑铁卢N2L,3G1,加拿大 |
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| 基金项目： | 国家自然科学基金
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清华大学先进成形制造教育部重点实验室开放基金
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| 摘 要： | 在电子、汽车及音响器件的制造中,稀土永磁材料NdFeB与钢构件之间连接通常采用机械连接或粘接的方法,而关于钢与磁材料焊接的研究与应用还未见报道.为实现钢磁异质材料之间快速和高质量的连接,该文探索采用激光点焊方法连接SPCC钢与NdFeB永磁体,并对接头的形成过程、硬度、强度和断裂行为进行了研究.结果表明:激光点焊过程中,两种母材受热快速熔化、混合、凝固形成接头;接头中硬度分布不均匀,热影响区的硬度比NdFeB母材低,熔核内熔核线附近区域硬度最高,熔核中部硬度最低;接头断裂应力可达到磁体强度的75%;熔核与磁体界面上容易出现热裂纹,结合较弱,因此剪切试验中接头主要从这一区域发生断裂,断裂为晶间断裂,是典型的脆性断裂.
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| 关 键 词： | NdFeB永磁体 激光点焊 异质材料 热裂纹 脆性断裂 |
Laser spot welding of SPCC steel to NdFeB magnets |
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| CHANG Baohua,BAI Haojun,LI Xiaogang,DING Yuquan,ZHANG Hua,DU Dong,ZHOU Yunhong.Laser spot welding of SPCC steel to NdFeB magnets[J].Journal of Tsinghua University(Science and Technology),2008,48(11). |
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| Authors: | CHANG Baohua BAI Haojun LI Xiaogang DING Yuquan ZHANG Hua DU Dong ZHOU Yunhong |
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| Institution: | CHANG Baohua1,BAI Shaojun1,LI Xiaogang2,DING Yuquan2,ZHANG Hua1,DU Dong1,ZHOU Yunhong2(1.Key Laboratory for Advanced Materials Processing Technology of Ministry of Education,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China,2.Department of Mechanical Engineering,University of Waterloo,Waterloo N2L 3G1,Canada) |
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| Abstract: | Mechanical fastening or adhesive bonding is generally used to join NdFeB permanent magnets to steel components,with no research on the welding of magnets to steel.Here,laser spot welding was used to join a NdFeB permanent magnet to SPCC(steel plate cold commercial) steel in a high speed,high quality joining of dissimilar magnet and steel materials.The joint formation mechanism,hardness,strength,and fracture behavior are analyzed.The results show that during the welding process,the two base metals quickly me... |
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| Keywords: | NdFeB magnet laser spot welding dissimilar materials hot crack brittle fracture |
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