厂机械工程材料
MATERALS FOR MECHANICAL ENGIMEERIWG D01: 10.11973/jxgccl201607007
2016年7月第40卷第7期Vol,40 No,7 Jul,2016
大厚度TA15钛合金板潜弧焊接头的组织及拉伸性育
能
都强'，倪家强"，邵大伟"，蔡健"，刘艳梅"，常荣辉"
（1.沈阳飞机工业（集团）有限公司，沈阳110850；2.沈阳特种设备检测研究院，沈阳110035；
3.北方重工集团有限公司，沈阳110141）
摘要：在添加TA1纯钛中间层填充板的条件下，对64mm厚TA15钛合金板进行潜弧焊接，分析了焊接接头的显微组织、拉伸性能以及焊缝中氢、氧、氮的含量，并与不添加中间层的普通潜弧焊接头的拉伸性能进行了对比，结果表明：添加中间层后焊接接头的焊缝区组织为较大尺寸的柱状晶，晶内分布着不同方向的针状α相，母材区组织为初生α相和少量3相，热影响区组织中既存在α相，也存在<相；添加中问层后焊接接头的抗拉强度比普通潜弧婵接头的有所降低，但其塑性显著提高，焊缝中氢、氧、氮的含量比母材中的有所降低。
关键词：大厚度板；TA15钛合会；潜弧焊；拉伸性能
中图分类号：TG456.9
文献标志码：A
文章编号：1000-3738(2016)07-0032-03
Microstructure and Tensile Properties of Welded Joints Prepared with Heavy Thickness TA15 Titanium Alloy Plates by Hidden Arc Welding DU Qiang', NI Jia-qiang', SHAO Da-wei', CAI Jian', LIU Yan-mei', CHANG Rong-hui(1.Shenyang Aircraft Corporation, Aviation Industry Corporation of China, Shenyang 110850, China:
2.Shenyang Institute of Special Equipment Inspection &. Research, Shenyang 110035, China;
3.Northern Hervy Industry Group Co. , LTD, Shenyang 110141, China)
Abstract : Under the condition of adding TAl pure titanium middle layer filling plate, hidden are welding test was carried out on TA15 titanium alloy plates with thickness of 64 mm, the microstructure, tensile properties of
welded joint and hydrogen, oxyge joint adding interlayer were c
show that the microstructu
red with that
OTnE
crystal, intracrystalline aciceular
oha
of β phase tissue were in the base metal a
middle layer, the tensile strength of the
veldedioint
analyzed; Tensile properties of the welded velded joint without interlayer. Results
interlay
as larger size of columnar
the primary α phase and a small amount ere found in heat affected zone. After adding ordinary hidden are welded joints, but its
than
plastic increased significantly, the contents of hydrogen, oxygen and nitrogen in the welded joint were lower than those in the base metal.
Key words: heavy thickness plate; TA15 titanium alloy; hidden arc welding ; tensile property
引言 0
钛合金以其比强度高、耐蚀性好、耐高温以及优良的焊接性等特点，广泛应用于现代飞机的制造中[1-2]。
在焊接大厚度钛合金零件时，通常采用钨极氩弧焊对双面开坡口的焊件进行层层堆焊，每层焊道收稿日期：2015-12-22；修订日期：2016-05-05
作者简介：部强（1983一），男，辽宁沈阳人，工程师，学士 32
焊完后都需要等待冷却后再次进行堆焊，并且存在焊接时闻长、零件变形量大、容易生成氧化夹杂等缺点]。随着高能束流焊接技术的快速发展，采用真空电子束焊接技术对大厚度钛合金零件进行焊接的工艺已经趋于成熟，但该工艺存在生产成本高、抽放真空焊接等待时间长、零件尺寸受真空室大小的限制等不足。潜弧焊方法可以在不开坡口的情况下-次性焊接大厚度钛合金零件，摆脱了真空室大小的限制，降低了生产成本。