Microstructure and Tensile Properties of Welded Joints Prepared with Heavy Thickness TA15 Titanium Alloy Plates by Hidden Arc Welding
摘 要
在添加TA1纯钛中间层填充板的条件下, 对64 mm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β相, 热影响区组织中既存在α相, 也存在α′相; 添加中间层后焊接接头的抗拉强度比普通潜弧焊接头的有所降低, 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。
Abstract
Under the condition of adding TA1 pure titanium middle layer filling plate, hidden arc welding test was carried out on TA15 titanium alloy plates with thickness of 64 mm, the microstructure, tensile properties of welded joint and hydrogen, oxygen, nitrogen content in weld seam were analyzed; Tensile properties of the welded joint adding interlayer were compared with that of the ordinary hidden arc welded joint without interlayer. Results show that the microstructure of the weld seam zone of welded joint adding interlayer was larger size of columnar crystal, intracrystalline acicular α′ phase distributed in different directions, the primary α phase and a small amount of β phase tissue were in the base metal area, α phase and α′ phase were found in heat affected zone. After adding middle layer, the tensile strength of the welded joint was lower than ordinary hidden arc welded joints, but its plastic increased significantly, the contents of hydrogen, oxygen and nitrogen in the welded joint were lower than those in the base metal.
中图分类号 TG456.9 DOI 10.11973/jxgccl201607007
所属栏目 试验研究
基金项目
收稿日期 2015/12/22
修改稿日期 2016/5/5
网络出版日期
作者单位点击查看
备注都强(1983-), 男, 辽宁沈阳人, 工程师, 学士。
引用该论文: DU Qiang,NI Jia-qiang,SHAO Da-wei,CAI Jian,LIU Yan-mei,CHANG Rong-hui. Microstructure and Tensile Properties of Welded Joints Prepared with Heavy Thickness TA15 Titanium Alloy Plates by Hidden Arc Welding[J]. Materials for mechancial engineering, 2016, 40(7): 32~34
都强,倪家强,邵大伟,蔡健,刘艳梅,常荣辉. 大厚度TA15钛合金板潜弧焊接头的组织及拉伸性能[J]. 机械工程材料, 2016, 40(7): 32~34
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