CAJ | 학술논문

以8mm厚2219铝合金板为研究对象，开展变极性TIG电弧横焊技术初步研究。在优化焊接参数的基础上，得到不同焊接参数和成形良好的横焊接头，并对接头的组织和力学性能特征进行了分析。结果表明：当焊接速度较快时，接头气孔缺陷较少；多层多道焊接头受多次热循环影响，组织特征较为复杂；焊接参数变化对接头组织特征影响显著；稍大的焊接速度有利于提高接头的抗拉强度和弯曲性能；接头硬度虽然能够反映接头的力学性能，但接头强度还与接头内焊接缺陷的数量和分布密切相关。
이8mm후2219려합금판위연구대상，개전변겁성TIG전호횡한기술초보연구。재우화한접삼수적기출상，득도불동한접삼수화성형량호적횡한접두，병대접두적조직화역학성능특정진행료분석。결과표명：당한접속도교쾌시，접두기공결함교소；다층다도한접두수다차열순배영향，조직특정교위복잡；한접삼수변화대접두조직특정영향현저；초대적한접속도유리우제고접두적항랍강도화만곡성능；접두경도수연능구반영접두적역학성능，단접두강도환여접두내한접결함적수량화분포밀절상관。
The preliminary research on variable polarity TIG arc horizontal position welding technology based on 8mm thickness 2219 aluminum alloy has been carried out. Horizontal position welds with good formation were obtained after the optimization of welding parameters. The characteristics of microstructures and mechanical properties of the joints were analyzed. Results indicated that the porosity welding defects were not serious when the welding velocity was much higher. The characteristics of the microstructures were more complex due to the influence of the repeated thermal cycles. Moreover, the effect of welding current or welding velocity on microstructures was more apparent. The tensile strength and bending properties could be improved using higher welding velocity. The hardness distribution of the horizontal position welding joint could indicate its mechanical properties to a certain extent but the tensile strength of horizontal position weld had a close relationship with the amount and the distribution of welding defects.