不同氟化物对钛合金A-TIG焊接成形和组织的影响
发布时间：2018-11-11 08:12
【摘要】：采用9种氟化物对TC4钛合金进行A-TIG焊接实验,并利用高速摄像机和汉诺威焊接质量分析仪采集焊接过程中的电弧形态和电压信号,对焊后焊接接头的成形参数和宏观组织进行了对比分析。结果表明:9种氟化物中MgF_2活性剂增加焊缝熔深效果最显著,达到无活性剂时的2倍,KF居次,但Li F可降低焊缝熔深;相比MgF_2活性剂,KF活性剂的熔宽小,热影响区宽度窄,接头总宽度小;Na F活性剂获得了最小的热影响区宽度;NaF、KF、MgF_2、Al F3活性剂焊缝的β柱晶生长方向与焊缝中心轴线的倾角比其它活性剂大,柱晶长度由熔深大小决定,柱晶宽度尺寸排序:AlF_3KFMgF_2NaF;热影响区粗晶区晶粒大小排序:MgF_2NaFAlF_3KF。
[Abstract]:The TC4 titanium alloy was welded by A-TIG with 9 kinds of fluoride. The arc shape and voltage signals were collected by high speed video camera and Hannover welding quality analyzer. The forming parameters and macroscopic microstructure of welded joint after butt welding were compared and analyzed. The results showed that the effect of MgF_2 on weld penetration was the most obvious in the nine fluorides, which was 2 times as high as that of non-active agent, followed by KF, but Li F could decrease the weld penetration. Compared with MgF_2 active agent, the width of KF active agent is smaller, the width of heat-affected zone is narrow, and the width of joint total width of; Na F active agent is the smallest. The orientation of 尾 -columnar crystal growth direction of NaF,KF,MgF_2,Al F _ 3 active seam is larger than that of other active agents, and the length of column crystal is determined by the depth of penetration. The order of column width size is: AlF_3KFMgF_2NaF;. Order of grain size in the coarse-grained region of the heat-affected zone: MgF_2NaFAlF_3KF.
【作者单位】： 内蒙古工业大学;
【基金】：国家自然科学基金(51165027)
【分类号】：TG444.74
[Abstract]:The TC4 titanium alloy was welded by A-TIG with 9 kinds of fluoride. The arc shape and voltage signals were collected by high speed video camera and Hannover welding quality analyzer. The forming parameters and macroscopic microstructure of welded joint after butt welding were compared and analyzed. The results showed that the effect of MgF_2 on weld penetration was the most obvious in the nine fluorides, which was 2 times as high as that of non-active agent, followed by KF, but Li F could decrease the weld penetration. Compared with MgF_2 active agent, the width of KF active agent is smaller, the width of heat-affected zone is narrow, and the width of joint total width of; Na F active agent is the smallest. The orientation of 尾 -columnar crystal growth direction of NaF,KF,MgF_2,Al F _ 3 active seam is larger than that of other active agents, and the length of column crystal is determined by the depth of penetration. The order of column width size is: AlF_3KFMgF_2NaF;. Order of grain size in the coarse-grained region of the heat-affected zone: MgF_2NaFAlF_3KF.
【作者单位】： 内蒙古工业大学;
【基金】：国家自然科学基金(51165027)
【分类号】：TG444.74
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