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| 不同工艺下ZTC4钛合金铸件微观组织研究 |
| Microstructure of ZTC4 Titanium Alloy Casting in Different Process |
| Received:April 24, 2018 Revised:May 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.03.005 |
| 中文关键词: ZTC4钛合金 微观组织 晶粒尺寸 片层间距 不同工艺 |
| 英文关键词: ZTC4 titanium alloy microstructure grain size lamella spacing different process |
| 基金项目:工信部民用飞机专项（MJ-2014-G-25） |
| Author Name | Affiliation | | QIE Xi-wang | 1. Baimtec Material Co., Ltd., Beijing 100094, China
2. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
3. Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology, Beijing 100095, China | | FENG Xin | 1. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
2. Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology, Beijing 100095, China | | WU Guo-qing | Beihang University, Beijing 100191, China | | NAN Hai | 1. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
2. Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology, Beijing 100095, China |
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| 中文摘要: |
| 目的 研究不同浇注工艺下ZTC4大型薄壁复杂结构铸件各部位组织的差异。方法 对大型复杂钛合金铸件结构进行分析，确定选取3种不同浇注工艺参数下典型铸件的厚大区、中厚区、薄壁区和厚薄转接区为研究对象，通过铸造钛合金β晶粒及α片层间距定量分析方法，对ZTC4钛合金铸件微观组织进行定量化检测，分析了铸造钛合金不同位置试样的β晶粒尺寸及α片层间距。结果 铸件各部分的β晶粒尺寸、α片层间距与铸件壁厚相关，随着试样厚度的增加，其β晶粒尺寸、α片层间距呈线性增大的趋势；对比不同工艺下1#，2#，3#铸件在相同位置处试样的β晶粒尺寸，发现2#铸件试样的β晶粒尺寸均存在明显的晶粒粗大现象。结论 通过铸造工艺可以调节改善钛合金铸件微观组织。 |
| 英文摘要: |
| The paper aims to research structural difference in each position of ZTC4 large thin-walled complex structure casted in different processes. Structure of large complex titanium alloy castings were analyzed. Thick area, medium-thick area, thin-walled area and thick-thin transformation area of typical castings casted in three different casting parameters were taken as objects of study. Quantification inspection on microstructure of ZTC4 titanium alloy castings were carried out through quantitative analysis on β grain size and α lamella spacing of titanium alloy. The β grain size and α lamella spacing of titanium alloy samples in different positions were analyzed. The β grain size and α lamella spacing of casting were related to the increase of the sample thickness. The β grain size and α lamella spacing of casting increased linearly. Compared with the β grain size and α lamella spacing in the same location of 1#, 2#, 3# castings in different processes, the β grain size in 2# sample casting presented the phenomenon of coarse grains obviously. Finally, the microstructure of ZTC4 can be improved by different casting process. |
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