TiC金属陶瓷/铸铁钎焊接头热应力的有限元模拟  

Finite element simulation of thermal stress on the brazed TiC cermet/iron joint

作　　者：冯吉才[1] 张丽霞[1] 

机构地区：[1]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

出　　处：《焊接学报》2005年第12期9-12,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金(50325517)

摘　　要：研究了采用Ag-Cu-Zn钎料在1173K温度下钎焊TiC金属陶瓷与铸铁时,接头在冷却过程中的热应力最大值和应力集中区。模拟结果表明,在冷却过程中,铸铁/TiC金属陶瓷接头的剪应力主要集中在界面端点处,且剪应力的最大值出现在Ag-Cu-Zn/TiC金属陶瓷界面处。TiC金属陶瓷下表面的拉应力最大值出现在TiC金属陶瓷的端点处,且随着连接温度的降低拉应力的最大值逐渐降低。TiC金属陶瓷下表面的压应力最大值出现在TiC金属陶瓷中部,且随着连接温度的降低压应力值逐渐增加。Maximum value of thermal stress and stress concentration zones of iron/titanium carbide (TiC) cermet joint brazed at 1173 K during cooling were studied. The results show that the shear stress on iron/TiC cermet joint concentrates on the interface tip and the maximum value of the shear stress appears on the Ag-Cu-Zn/TiC cermet interface. The maximum value of tensile stress along TiC cermet undersurface appears on the tips of TiC cermet undersurface, which decreases when the temperature declines. The maximum value of compressive stress along TiC cermet undersurface appears on the center of TiC cermet undersurface, which increases when the temperature declines.

关 键 词：有限元模拟 TiC金属陶瓷 铸铁 钎焊 

分 类 号：TG404[金属学及工艺—焊接]