搅拌摩擦焊接过程塑性流动形态与试验分析  

Plastic flow pattern and test analysis in friction stir welding

作　　者：王训宏[1] 王快社[1] 徐可为[2] 胡锴[3] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710048 [3]西安航空发动机(集团)有限公司,陕西西安710021

出　　处：《兵器材料科学与工程》2006年第6期47-50,共4页Ordnance Material Science and Engineering

基　　金：陕西省科技计划项目(2003K07-G8);陕西省教育厅产业化项目(04JC18);西安市工业攻关项目(GG04063)资助

摘　　要：使用FLUENT流体工程仿真软件对搅拌摩擦焊缝金属的塑性流动进行数值模拟,初步得出搅拌摩擦焊焊缝塑性流体流动规律,并进行试验分析与验证。试验结果表明:随着距轴肩和搅拌针距离的增大,速度场开始减弱,焊缝金属由顶面向底面、由搅拌区向旋转区的流动也随之减弱;水平方向计算结果与试验结果基本吻合。搅拌工具旋转速度是影响接头成型形貌的关键原因之一,速度过低有可能会导致隧道型孔洞缺陷。Based on FLUENT simulation software, numerical simulation of the flow pattern in friction stir welding was carried out and the rule of flow pattern was obtained. The result shows that the velocity field decreases with increasing space between shoulder and stir tool and the flow pattern decreases from top to bottom and from stir zone to rotation zone. Result of numerical simulation agrees well with that of testing. Rotation speed is one of the key reasons which are relative to the quality of friction stir welds and tunnel defect existes at lower rotation speed.

关 键 词：搅拌摩擦焊 流动形态 模拟 焊接参数 隧道型孔洞 

分 类 号：TG146.4[一般工业技术—材料科学与工程]