| Ti700sr高温钛合金TIG焊接接头组织及性能研究 |
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| 引用本文： | 梅文佳,张云浩,高福洋,闫飞昊,余巍,蒋鹏,朱乐乐,刘茵琪.Ti700sr高温钛合金TIG焊接接头组织及性能研究[J].材料开发与应用,2021,36(4):72-75. |
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| 作者姓名： | 梅文佳 张云浩 高福洋 闫飞昊 余巍 蒋鹏 朱乐乐 刘茵琪 |
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| 作者单位： | 1. 中国船舶重工集团公司第七二五研究所, 河南 洛阳 471023; |
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| 摘 要： | 采用TIG焊接方法对Ti700sr高温钛合金板材进行了焊接,研究了接头的组织形貌、硬度分布及力学性能。结果表明,Ti700sr高温钛合金板材焊接后的接头成形良好,焊缝区组织由粗大的柱状晶及细长的针状α相构成,热影响区组织由细针状α和残余β相构成,热影响区析出相得到有效控制,相边界上无明显硅化物析出;焊接热影响区的硬度相对较高,焊缝的硬度相对较低;接头室温抗拉强度约为903 MPa, 700℃高温抗拉强度为397 MPa,焊缝强度低于母材的。
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| 关 键 词： | 高温钛合金 TIG焊接 组织形貌 力学性能 |
| 收稿时间： | 2020-10-09 |
Research on Microstructure and Properties of Ti700sr High-temperature Titanium Alloy TIG Welded Joint |
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| MEI Wenjia,ZHANG Yunhao,GAO Fuyang,YAN Feihao,YU Wei,JIANG Peng,ZHU Lele,LIU Yinqi.Research on Microstructure and Properties of Ti700sr High-temperature Titanium Alloy TIG Welded Joint[J].Development and Application of Materials,2021,36(4):72-75. |
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| Authors: | MEI Wenjia ZHANG Yunhao GAO Fuyang YAN Feihao YU Wei JIANG Peng ZHU Lele LIU Yinqi |
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| Affiliation: | 1. Luoyang Ship Material Research Institute, Luoyang 471023, China;2. Luoyang Sunrui Precision Casting Titanium Co. Ltd., Luoyang 471023, China;3. National Engineering Research Center for Advanced Titanium and Titanium Alloy Material Technology, Luoyang 471023, China;4. National New Material Production and Application Demonstration Platform(Advanced Marine Engineering and High-tech Ship Materials), Luoyang 471023, China |
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| Abstract: | The welding of Ti700sr high-temperature titanium alloy plate was conducted with TIG technology, and the microstructure, hardness distribution and tensile properties of the welded joints were analyzed. It was confirmed that the joint was well formed after welding. The weld zone was composed of coarse columnar crystal and slender acicular α phase, the heated affected zone was composed of slender acicular α phase and residual β phase. The precipitation in HAZ was effectively controlled, and there was no obvious silicide precipitation on the phase boundary. In general, the hardness of HAZ was relatively higher and the hardness of weld low. The strength of the joint was about 903 MPa at room temperature and 397 MPa at 700 ℃. The strength of the weld was lower than that of the base metal. |
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