【摘要】 用有限元方法计算了Al₂O₃陶瓷与45钢扩散焊接残余应力的分布,研究温度为1130℃,压力为10 MPa,冷却速度为10℃/min,模拟不同的中间层Cu、Ti、Ni分别对残余应力的分布,以及这3种材料自由组合成的不同复合中间层对残余应力的分布规律。结果表明:采用单层中间层时,中间层为Cu对于残余应力的减小效果更加明显;复合中间层为Ti-Cu对于残余应力的减小效果要明显优于单层中间层;对于Ti-Cu组合的复合中间层,钛与铜的厚度配制不同对于应力的改变也各不相同,当钛的厚度为0.4 mm、铜的厚度为0.6 mm时,残余应力的减小效果较好。更多还原

【Abstract】 Residual stress distribution of Al₂O₃ ceramics/45 steel diffusion welding is calculated using finite element method（FEM）. For the present study, the temperature is 1130 ℃, pressure is 10 MPa and the cooling speed is 10 ℃/min.This paper simulates the distribution of residual stress for middle layer of Cu, Ti and Ni as well as the free combination of the three materials of Cu, Ti and Ni into different composite layer, respectively. Results show that when using single middle layer, the effect of the decrease of residual stress for middle layer of Cu is more obvious. The effect of the decrease of residual stress for the composite middle layer of Ti-Cu is significantly superior to the single middle layer. For the composite middle layer of Ti-Cu, the change of residual stress for different thickness preparation of composite middle layer of Ti-Cu is different respectively. When the thickness of titanium is 0.4 mm and the thickness of copper is 0.6 mm,the effect for the decrease of residual stress is better.更多还原