| 摘要: |
| 采用接触反应钎焊法,以铜箔-铝片-铜箔复合中间层替代单层铜箔在真空(真空度为10-3Pa)条件下,改变焊接保温时间焊接泡沫铝,得到不同性能的焊接试样.对焊接接头的宏观、微观组织结构与抗弯强度进行了分析比较.结果表明,在焊接温度570℃的条件下,焊接保温时间为15 min的焊接试样失效发生在母材处,其余试样失效位置均发生在焊缝位置.随着保温时间的增加,焊接接头抗弯强度呈现先升后降的变化趋势.保温时间为15 min条件下所得到的焊接接头抗弯强度最高,且高于母材. |
| 关键词: 泡沫铝 接触反应钎焊 微观组织 力学性能 |
| DOI： |
| 分类号: |
| 基金项目:国家高科技研究发展计划重点项目资助(2009AA050705) |
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| Properties of aluminum foam joints during contact reactive brazing processes |
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CHEN Nannan, FENG Yi, CHEN Jie, LI Bin, CHEN Fanyan
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School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
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| Abstract: |
| Under different brazing time,pure aluminum foams were welded by contact reactive brazing in vacuum environment with multilayer filler metals.The macrostructure and microstructure characteristics and bending strength of the joints were investigated.The specimen,brazed at 570℃ for 15 min, failed through the base metal,while the others fractured through the brazed seam.The bending strength of joints firstly ascended to a peak point and then decreased with the increase of brazing time.The bending strength of joint brazed for 15 min reached the highest,stronger than that of the aluminum foam substrate. |
| Key words: aluminum foam contact reactive brazing microstructure mechanical property |
