| 钛/铝异种金属冷金属过渡增材制造 |
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| 引用本文： | 田银宝,申俊琦,胡绳荪,李桓,勾健.钛/铝异种金属冷金属过渡增材制造[J].焊接学报,2019,40(8):13-17. |
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| 作者姓名： | 田银宝 申俊琦 胡绳荪 李桓 勾健 |
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| 作者单位： | 天津大学材料科学与工程学院,天津 300354;天津大学天津市现代连接技术重点实验室,天津 300354;天津大学天津市现代连接技术重点实验室,天津,300354;天津大学材料科学与工程学院,天津,300354 |
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| 基金项目： | 国家自然科学基金资助项目（51575381）；天津市应用基础及前沿技术研究计划资助项目（15JCZDJC38600） |
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| 摘 要： | 采用TC4和ER2319焊丝直流/变极性冷金属过渡实现异种金属电弧增材制造，通过金相显微镜、扫描电镜、透射电镜、能谱、硬度试验、纳米压痕以及拉伸试验等方法对钛/铝构件界面组织特征与力学性能进行分析.结果表明，在钛合金表面堆积铝合金时，只有少量的钛合金熔化，钛原子扩散到液态铝合金中，形成不同长度的TiAl3金属间化合物.10 μm左右的反应层在钛/铝界面形成.邻近钛侧的反应层均匀连续，靠近铝合金一侧的反应层呈现长条状或块状.界面反应层的显微硬度介于钛合金和铝合金显微硬度之间.构件的最高抗拉强度为111 MPa.
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| 关 键 词： | 钛合金 铝合金 冷金属过渡 增材制造 |
| 收稿时间： | 2018/11/19 0:00:00 |
Ti/Al dissimilar metals fabricated by cold metal transfer additive manufacturing |
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| TIAN Yinbao,SHEN Junqi,HU Shengsun,LI Huan and GOU Jian.Ti/Al dissimilar metals fabricated by cold metal transfer additive manufacturing[J].Transactions of The China Welding Institution,2019,40(8):13-17. |
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| Authors: | TIAN Yinbao SHEN Junqi HU Shengsun LI Huan and GOU Jian |
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| Affiliation: | 1.Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300354, China;School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China2.School of Materials Science and Engineering, Tianjin University, Tianjin 300354, China3.Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300354, China |
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| Abstract: | Dissimilar alloys component was fabricated using TC4 and ER2319 wires by direct/variable polarity cold metal transfer. Microstructure and mechanical properties of Ti/Al component were analyzed by optical microscope, scanning electron microscope, transmission electron microscopy, energy dispersive X-ray spectrometer, nanoindentation, microhardness test and tensile test. The results shown that minute Ti alloy was melted when Al alloy was deposited on the surface of Ti alloy. Ti atoms diffused to liquid Al alloy and the long strip TiAl3 phases were formed with difference length. The reaction layer about 10 μm in thickness was formed at the Ti/Al interface. The reaction layer near the Ti alloy side was continuous. The reaction layer near the Al alloy was long strip or block shape. The microhardness of reaction layer was between Al alloy and Ti alloy. The maximum tensile strength of the component was 111 MPa. Fracture occurred in the Ti/Al reaction layer for all samples. |
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| Keywords: | Ti alloy Al alloy additive manufacturing cold metal transfer |
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