惯性摩擦焊接头非对称性分析

应用无线测温系统和热电偶测温技术,试验测定了惯性摩擦焊旋转端和滑移端试件的温度场,探讨了惯性摩擦焊摩擦界面两侧温度分布的非对称性;统计分析了不同焊接条件下惯性摩擦焊试样焊接区域的几何特征及宏观形貌.结果表明,滑移端的温度及升温速率均高于旋转端,滑移端的轴向缩短量、飞边宽度以及热力影响区(TMAZ)宽度均大于旋转端.分析认为惯性摩擦焊摩擦结合界面两侧温度场的非对称性与焊接区域几何特征的非对称性紧密相连.

Asymmetry of inertia friction welding joint

The temperature fields in inertial friction welded bars, rotating and slipping ones, were measured by thermocouple and wireless temperature-measuring system. The asymmetry of the temperature distribution at both sides of inertial friction interface was investigated. The geometrical feature and macrograph of inertial friction welding zone under different welding conditions were statistically analyzed. It is shown that the temperature and its rising rate at the slipping side are higher than at that one at the rotating side. The axial shortening quantity, flash width and the width of thermal mechanical affected zone(TMAZ) at the slipping side are greater than that one at another side. It is considered that the asymmetry of temperature distributions at both sides of inertial friction interface is closely relevant to the asymmetry of geometrical feature at both sides of the inertial friction welding zone.