| 钎料对TiC陶瓷/铸铁钎缝处剪应力的影响 |
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| 引用本文： | 张丽霞,冯吉才,李卓然,刘会杰.钎料对TiC陶瓷/铸铁钎缝处剪应力的影响[J].焊接学报,2003,24(5):10-12. |
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| 作者姓名： | 张丽霞 冯吉才 李卓然 刘会杰 |
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| 作者单位： | 哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金(50175021) |
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| 摘 要： | 采用有限元数值模拟方法研究了采用不同钎料对冷却过程中TiC陶瓷／铸铁焊缝处剪应力的影响。结果表明，无论采用Ni基钎料、Ti基钎料还是他基钎料，剪应力均主要集中在TiC陶瓷／铸铁的钎缝端点上。当采用Ni基和Ag基钎料时，剪应力的最大值出现在钎料／TiC陶瓷界而；而采用Ti基钎料时，剪应力的最大值出现在铸铁／钎料界面。当采用Ni基和Ti基钉料时，冷却到室温的钎缝最大剪应力值较大，因此接头的连接强度较低；当采用Ag基钎料时，冷却到室温的钎缝最大剪应力值较小，因此接头的连接强度较高。
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| 关 键 词： | TiC陶瓷／铸铁 钎焊 有限元 数值模拟 剪应力 钎料 |
| 文章编号： | 0253-360X(2003)05-10-03 |
| 收稿时间： | 2003/1/22 0:00:00 |
Effect of brazing fillers on shear stress in brazing fillet of TiC ceramic/cast iron |
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| ZHANG Li-xi,FENG Ji-cai,LI Zhuo-ran and LIU Hui-jie.Effect of brazing fillers on shear stress in brazing fillet of TiC ceramic/cast iron[J].Transactions of The China Welding Institution,2003,24(5):10-12. |
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| Authors: | ZHANG Li-xi FENG Ji-cai LI Zhuo-ran and LIU Hui-jie |
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| Affiliation: | ZHANG Li-xia,FENG Ji-cai,LI Zhuo-ran,LIU Hui-jie National Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | By means of finite element numerical simulation, theeffect of different brazing fillers on the shear stress in brazing fillet was in-vestigated. The results show that no matter what brazing filler is used a-mong Ni-based, Ti-based and Ag-based brazing fillers, the shear stress al-ways concentrates on tip of TiC ceramic/cast iron interface of brazing fil-let. When Ni-based and Ag-based brazing filler are used, the maximumvalue of shear stress occurs on brazing filler/TiC ceramic interface. WhenTi-based brazing filler is used, the maximum value of shear stress occurson iron/brazing filler interface. The quality of the joint brazing filler withAg-based brazing filler is best because of its low shear stress value. |
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| Keywords: | finite element numerical simulation shear stress |
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