| Ti-3Al-2.5V钛合金精密铸造浇注系统优化研究 |
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| 引用本文： | 李伟淑,田智星,钱巍,崔新鹏,张强,王红红.Ti-3Al-2.5V钛合金精密铸造浇注系统优化研究[J].精密成形工程,2018,10(3):154-162. |
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| 作者姓名： | 李伟淑 田智星 钱巍 崔新鹏 张强 王红红 |
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| 作者单位： | 1. 北京市先进钛合金精密成型工程技术研究中心，北京航空材料研究院，北京 100095；2. 百慕航材高科技股份有限公司，北京 100094,1. 北京市先进钛合金精密成型工程技术研究中心，北京航空材料研究院，北京 100095；2. 百慕航材高科技股份有限公司，北京 100094,1. 北京市先进钛合金精密成型工程技术研究中心，北京航空材料研究院，北京 100095；2. 百慕航材高科技股份有限公司，北京 100094,北京市先进钛合金精密成型工程技术研究中心，北京航空材料研究院，北京 100095,1. 北京市先进钛合金精密成型工程技术研究中心，北京航空材料研究院，北京 100095；2. 百慕航材高科技股份有限公司，北京 100094,百慕航材高科技股份有限公司，北京 100094 |
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| 基金项目： | 工信部民用飞机专项科研项目（MJ-2014-G-25） |
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| 摘 要： | 利用数值模拟方法，研究了重力场和立式离心场下，不同浇注系统（顶-底、螺旋、径向和树形系统）Ti-3Al-2.5V钛合金铸件的充型和凝固过程及缩孔缺陷分布规律，并通过实际铸造实验，对铸件的机械性能及缩孔缺陷进行了检测。结果表明，重力场下的顶-底浇注系统氧含量波动范围大，不同浇注系统对合金力学性能影响不大，缩孔的模拟结果与实际铸造情况都吻合较好。相比而言，重力场下由于金属液的紊流更容易形成夹杂、钛豆、缩孔等缺陷，而离心场下由于离心力的作用，形成缩孔等缺陷的数量相对较少。
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| 关 键 词： | Ti-3Al-2.5V钛合金 铸造 数值模拟 浇注系统 缩孔 |
| 收稿时间： | 2018/4/8 0:00:00 |
| 修稿时间： | 2018/5/10 0:00:00 |
Optimization of the Precision Casting Pouring System of Ti-3Al-2.5V Titanium Alloy |
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| Wei-shu LI,Zhi-xing TIAN,Wei QIAN,Xin-peng CUI,Qiang ZHANG and Hong-hong WANG.Optimization of the Precision Casting Pouring System of Ti-3Al-2.5V Titanium Alloy[J].Journal of Netshape Forming Engineering,2018,10(3):154-162. |
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| Authors: | Wei-shu LI Zhi-xing TIAN Wei QIAN Xin-peng CUI Qiang ZHANG and Hong-hong WANG |
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| Affiliation: | 1. Beijing Engineering Research Center of Advanced Precise Forming of Titanium Alloys, Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. BAIMTEC Material Co., Ltd., Beijing 100094, China,1. Beijing Engineering Research Center of Advanced Precise Forming of Titanium Alloys, Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. BAIMTEC Material Co., Ltd., Beijing 100094, China,1. Beijing Engineering Research Center of Advanced Precise Forming of Titanium Alloys, Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. BAIMTEC Material Co., Ltd., Beijing 100094, China,Beijing Engineering Research Center of Advanced Precise Forming of Titanium Alloys, Beijing Institute of Aeronautical Materials, Beijing 100095, China,1. Beijing Engineering Research Center of Advanced Precise Forming of Titanium Alloys, Beijing Institute of Aeronautical Materials, Beijing 100095, China; 2. BAIMTEC Material Co., Ltd., Beijing 100094, China and BAIMTEC Material Co., Ltd., Beijing 100094, China |
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| Abstract: | The mold filling and solidification process of Ti-3Al-2.5V titanium alloy with different pouring systems (top-bottom, spiral, radial and tree pouring systems) in gravity field and vertical centrifugal field were studied by numerical simulation, and the mechanical properties and shrinkage defects of the castings were tested by actual casting experiments. The results show that the fluctuation range of oxygen content in the top-bottom pouring system under gravity field is large, the different casting systems have little influence on the mechanical properties of the alloy, and the simulation results of the shrinkage defects are well consistent with the actual casting conditions. The defects such as scab, sweat, and shrinkage are easy to produce because of the metal liquid turbulence under the gravity field. By comparison, the number of defects in the centrifugal field is relatively less due to the centrifugal force. |
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| Keywords: | Ti-3Al-2 5V titanium alloy casting numerical simulation pouring system shrinkage |
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