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| N掺杂型Al-4Ti-1C对A356合金细化及力学性能的影响 |
| Refining and Strengthening Performance of N-doped Al-4Ti-1C Refiner on A356 Alloy |
| Received:August 14, 2017 Revised:September 10, 2017 |
| DOI：10.3969/j.issn.1674-6457.2017.05.005 |
| 中文关键词: Al-4Ti-1C细化剂 A356合金 晶粒细化 力学性能 |
| 英文关键词: Al-4Ti-1C refiner A356 alloy grain refinement mechanical properties |
| 基金项目:国家自然科学基金（51071097） |
| Author Name | Affiliation | | YANG Hua-bing | Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China | | WANG Hai-chao | Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China | | LIU Gui-liang | Shandong Al & Mg Melt Tech. Co., Ltd., Jinan 250061, China | | LIU Xiang-fa | Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China |
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| 中文摘要: |
| 目的 提高A356合金的断裂伸长率。方法 采用铸造法制备了一种N掺杂型Al-4Ti-1C细化剂（简称Al-4Ti-1C），研究了其对A356合金的晶粒细化行为及对力学性能的影响。结果 与传统的Al-5Ti-1B细化剂相比，Al-4Ti-1C不仅能有效细化A356的α-Al晶粒，而且能够明显细化其枝晶臂间距，细化后α-Al的平均晶粒尺寸为231 μm，枝晶臂间距为28 μm；而Al-5Ti-1B细化后分别为253 μm和50 μm。该细化剂对A356合金力学性能的提升也优于Al-5Ti-1B，细化后A356的拉伸强度和伸长率为298 MPa, 4.0%，与Al-5Ti-1B的细化结果(292 MPa, 3.0%)相比，伸长率提高幅度达33%。结论 Al-4Ti-1C是一种有效的A356晶粒细化剂。 |
| 英文摘要: |
| This work aims to improve the elongation at break of A356 alloy. A type of N-doped Al-4Ti-1C (named Al-4Ti-1C) refiner was prepared via casting method, and the refining and strengthening performances of the refiner on A356 alloy were investigated. Compared with the conventional Al-5Ti-1B refiner, Al-4Ti-1C performed well on refining α-Al grains and their dendritic arm spacing, with an average size of 231 μm and 28 μm respectively, while they were just 253 μm and 50 μm when refined by Al-5Ti-1B. The refiner’s improvement on mechanical properties of A356 alloy was also superior to Al-5Ti-1B. When changing refiners from Al-5Ti-1B to Al-4Ti-1C, the ultimate tensile strength (UTS) of A356 increased from 292 MPa to 298 MPa and the elongation increased from 3.0% to 4.0%, with a percentage increase of 33%. Al-4Ti-1C presents to be an effective refiner for A356 alloy. |
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