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材料研究学报  2015, Vol. 29 Issue (1): 25-31    DOI: 10.11901/1005.3093.2014.317
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钎焊用薄铝层铝/钢复合带材的临界压下量*
李龙,陈鑫,高闯,张小军,周德敬(),凌亚标
银邦金属复合材料股份有限公司 江苏省金属层状复合材料重点实验室 无锡 214145
Effect of Cold Rolling Reduction on Performance of Thin Aluminum Clad Steel Strips for Brazing
Long LI,Xin CHEN,Chuang GAO,Xiaojun ZHANG,Dejing ZHOU(),Yabiao LING
Yin Bang Clad Material Co., Ltd., Jiangsu Key Laboratory for Clad Materials, Wuxi 214145, China
引用本文:

李龙,陈鑫,高闯,张小军,周德敬,凌亚标. 钎焊用薄铝层铝/钢复合带材的临界压下量*[J]. 材料研究学报, 2015, 29(1): 25-31.
Long LI, Xin CHEN, Chuang GAO, Xiaojun ZHANG, Dejing ZHOU, Yabiao LING. Effect of Cold Rolling Reduction on Performance of Thin Aluminum Clad Steel Strips for Brazing[J]. Chinese Journal of Materials Research, 2015, 29(1): 25-31.

全文: PDF(5337 KB)   HTML
摘要: 

通过钎焊后拉剪实验得到了不同压下量下铝/钢复合界面的结合强度, 用扫描电镜观察了不同压下量下的铝/钢复合材料拉剪断口的形貌, 并用能谱仪分析了拉剪断口上的元素。根据拉剪强度并结合断口形貌, 定义了钎焊用冷轧4A60铝/08Al钢复合材料的最小复合压下量为35%, 稳定复合压下量为50%。

关键词 金属材料铝/钢复合带材冷轧复合临界压下量拉剪实验    
Abstract

Thin 4A60 Al-alloy clad 08Al-steel strips were made by cold rolling with different reduction rates. The clad strips were then brazed with a thin film of 3003 Al-alloy. The interfacial bonding strength of aluminum to steel was evaluated by tensile shearing test in order to determine critical rolling reduction of thin aluminum clad steel sheets. The fracture morphology and element distribution were observed and analyzed by means of scanning electron microscope (SEM), energy dispersive spectrometer (EDS), respectively. Finally, a minimum bonded reduction of 35% was suggested and the stable reduction of 50% was proposed based on the measured bonding strength and the observed fracture morphology.

Key wordsmetallic materials    aluminum clad steel strip    cold roll bonding    critical reduction    tension shear testing
收稿日期: 2014-07-02     
基金资助:* 国家高技术研究发展计划项目2013AA031301, 国家国际科技合作专项项目2013DFB50170和江苏省重点实验室项目BM2014006资助。
Materials C Si Mn P S Fe Al
Clad layer 4A60 - 0.83 0.01 - - 0.32 Bal.
Base layer 08Al 0.007 0.14 0.212 0.02 0.004 Bal. -
表1  铝/钢复合带材中组元材料的化学成分
图1  铝/钢复合带材的钎焊工艺
图2  拉剪试样示意图
图3  钎焊后界面附近的SEM形貌和钎焊前后Fe、Al元素的扩散
图4  不同压下量4A60/08Al冷轧复合带材的拉剪实验结果
图5  不同压下量的铝/钢复合带材钢侧的断口形貌
图6  不同压下量铝钢复合带材钢侧的断口形貌
图7  用化学方法处理掉铝层后钢侧结合面的形貌
图8  断口铝残留面积分数与压下量的关系以及残留铝的面积分数与拉剪强度的关系
图9  界面结合强度的实测值和预测值
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