【摘要】 扩散连接接头区域元素浓度的分布是扩散连接技术中影响被连接材料的扩散、相变、界面反应及接头质量的重要因素。为此人们借助于计算技术 ,对其进行数值模拟 ,以便对扩散连接过程及质量进行预测与实时控制。针对异种材料的扩散连接过程 ,以热力学第二定律为基础 ,进行了扩散连接接头区域元素浓度分布的数值分析 ,建立了生成固溶体类型的界面反应模型 ,以使人们能够定性或半定量的分析扩散连接因素对接头性能的影响。利用耐热合金K5与耐热钢 2Cr12NiMoV的扩散连接对建立的模型的试验验证表明 ,模型能够较好的反映元素的分布规律 ,可以为扩散连接工艺参数的制定提供一定的参考更多还原

【Abstract】 Distribution of element at the interface in diffusion bonding is a cross behavior related to diffusion, phase transformation, and interfacial reaction, which affects bond performance. Therefore computing technology and numeric simulation were used in order to control diffusion bonding processes and forecast bond quality. In this paper,aiming to make diffusion bonding of dissimilar materials,on the basis of thermodynamic law,the density distribution of element at the interface of the joint was numerically analyzed ,and a model of interface reaction for establishing a solid solution interface layer was suggested, so that the effect of diffusion bonding parameters on bond performance can been analyzed qualitatively and semi-quantitatively. Diffusion bonding of heat resistant alloy K5 to heat resistant steel 2Cr12NiMoV validated correctness of this model, and which gave reference to establishing diffusion bonding parameters.更多还原