钛和锶对舰船用ER4043铝合金焊丝显微组织和性能的影响

发布时间：2018-04-13 19:38

本文选题：Ti元素 + Sr元素　；参考：《焊接学报》2015年06期

【摘要】：研究了元素Ti,Sr变质对舰船用ER4043铝合金焊丝的显微组织以及焊缝力学性能的影响.结果表明,钛的加入不仅能细化α-Al基体,还能变质共晶硅,促使粗大的片状或针状共晶硅转变为短棒状,提高4043合金轧杆以及接头的抗拉强度,并且当添加量为0.08%(质量分数)时接头强度达到166 MPa,比未变质4043焊缝接头强度提高5.7%;单独添加锶对α-Al晶粒的细化效果更为明显,共晶硅相以粒状均匀分布,并且当Sr元素的添加量为0.02%时,焊缝抗拉强度达到最大值187 MP,比未变质4043焊缝接头强度提高19.1%;通过数据对比可以发现,锶对4043的变质效果明显优于钛对4043的变质效果.
[Abstract]:The effect of modification of ER4043 Sr on microstructure and mechanical properties of welding wire of ER4043 aluminum alloy for ship was studied.The results show that the addition of titanium not only refines 伪 -Al matrix, but also modifies eutectic silicon, which makes the coarse lamellar or needle-shaped eutectic silicon change into short rod shape, and increases the tensile strength of 4043 alloy rod and joint.When adding 0.08 mass fraction, the strength of the joint reached 166MPa, which was 5.7mm higher than that of the unmodified 4043 weld joint, the refinement effect of 伪 -Al grain was more obvious by adding strontium alone, and the eutectic silicon phase distributed uniformly in granular form.The tensile strength of the weld reaches the maximum value of 187 MPP when the addition of Sr is 0.02, which is 19.1mm higher than that of the unmodified 4043 weld joint, and it is found that the modification effect of strontium on 4043 is obviously better than that of titanium on 4043 by comparing the data.
【作者单位】：南京航空航天大学材料科学与技术学院;浙江宇光铝材有限公司;
【基金】：金华市科技计划资助项目(2013-1-076)
【分类号】：TG422.3

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