Cu-Cr-Zr合金连续驱动摩擦焊接头热力演变

发布时间：2018-05-07 14:49

本文选题：Cu-Cr-Zr合金 + 连续驱动摩擦焊　；参考：《焊接学报》2015年09期

【摘要】：采用热电偶—蓝牙技术测量了Cu-Cr-Zr合金连续驱动摩擦焊接头特征点的温度,并研究接头温度与组织演变的关系.结果表明,各特征点温度均存在一定程度的滞后现象;沿工件径向,2/3R区温度最高;沿工件轴向,摩擦界面处温度最高;旋转工件的温度略低于移动工件.在热力耦合作用下,接头焊合区形成细小的等轴晶粒,热力影响区晶粒被不同程度拉长,呈塑性流线.从轴心到外径动态再结晶区的宽度增加,晶粒粗化,而与其相邻的热力影响区径向塑性流动的趋势减小.此外,与旋转端相比,移动端接头具有较高的峰值温度和再结晶峰值宽度,所对应的焊合区晶粒也较为粗大.
[Abstract]:The characteristic point temperature of friction welding joint driven by Cu-Cr-Zr alloy was measured by thermocouple and Bluetooth technique, and the relationship between joint temperature and microstructure evolution was studied. The results show that the temperature of each characteristic point has a certain degree of hysteresis; the temperature is the highest in the radial region of 2 / 3R of the workpiece; along the axial direction of the workpiece, the temperature at the friction interface is the highest; and the temperature of the rotating workpiece is slightly lower than that of the moving workpiece. Under thermal coupling, fine equiaxed grains were formed in the weld zone of the joints, and the grains in the thermal affected zone were elongated to varying degrees, showing a plastic streamline. The width of the dynamic recrystallization zone from the axis to the outer diameter increases and the grain coarsening, while the radial plastic flow decreases in the adjacent thermodynamic zone. In addition, the moving end joint has higher peak temperature and recrystallization peak width than that of the rotating end, and the corresponding grain size in the welding zone is also relatively large.
【作者单位】：江苏科技大学江苏省先进焊接技术重点实验室;
【基金】：国家自然科学基金资助项目(51375218,51205175) 江苏省重点序列学科建设资助项目(SZB20014-37) 江苏省先进焊接技术重点实验室基金资助项目(JSAWT-11)
【分类号】：TG407

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