摘要
摩擦堆焊过程中,能量沉积引起耗材端部表层材料的微结构发生改变,形成粘性类液层,类液层连续过渡与母材结合形成堆焊层。利用接触熔化理论建立了摩擦堆焊的物理模型,并进行了分析计算。计算结果表明,类液层厚度在耗材端部中心出现奇异性,随半径的增加类液层厚度逐渐减小。试验观察到的耗材端部凹陷与理论计算结果吻合,验证了接触熔化理论在摩擦堆焊热分析中的可行性。研究成果为摩擦堆焊机理研究提供了理论基础。
During consumable-rod friction surfacing (CFS) process, microstructure of surface layer at the top of consumable-rod changes due to energy concentration, and viscous quasi-liquid layer forms, which goes downwards to join base material. Contact melting theory was introduced to set up physical model for CFS's quasi-liquid layer and correlated calculations were carried out. The results indicated that quasi-liquid layer's thickness was likely to go to singularity at the centre of consumable-rod top surface, and decreased gradually along with radial increase. The results were consistent with experiments, verifying feasibility of using contact melting theory in study of CFS, which formed the theory basis for CFS mechanism.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2005年第6期45-49,共5页
Transactions of The China Welding Institution
