超声-脉冲TIG焊中超声振动的作用特点  

Effect of ultrasonic vibration in ultrasonic-assisted pulsed TIG welding

作　　者：林三宝[1] 张勤练[1] 范成磊[1] 杨春利[1] 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,150001

出　　处：《焊接》2011年第11期11-16,70,共6页Welding & Joining

基　　金：国家自然科学基金项目(50975063)

摘　　要：超声辅助TIG焊是近几年开发的一种新型高效TIG焊方法,前期主要研究了超声振动在直流TIG焊中的作用特点,但在脉冲TIG焊中的作用特点尚不清楚。通过不同焊接参数下的焊接试验,探究了超声在空气中的传播形式,讨论了超声振动对焊接熔池的作用特点。研究结果表明:在特定的辐射端高度下声压较强;在较大的脉冲峰值电流下超声振动作用效果明显;不同脉冲频率下,熔深增加程度基本相同但组织细化程度不同。Ultrasonic-assisted tungsten inert-gas (TIG) welding is a new technology with high efficiency. In previous research the effect of ultrasonic vibration in direct current TIG welding was studied. However, the effect of ultrasonic vibration in pulsed TIG welding was still not clear. The characteristic of ultrasonic vibration in atmosphere and the effect ultrasonic vibration on weld pool were studied through different welding experiments. The results show that the ultrasound pressure is strong in specific height. The effect of ultrasonic vibration is favorable in larger pulse peak current. Weld penetration is almost equal at different pulse frequency, but the degree of refinement in weld zone is different.

关 键 词：超声振动 脉冲TIG 晶粒细化 

分 类 号：TG444.7[金属学及工艺—焊接]