祁明凡,李静媛,康永林,等.大体积流变浆料制备与压铸成形一体化工艺及其应用[J].精密成形工程,2020,12(3):12-19.
QI Ming-fan,LI Jing-yuan,KANG Yong-lin,et al.Integrated Technology and Application of Large Volume Rheological Slurry Preparation and High-pressure Die-casting[J].Journal of Netshape Forming Engineering,2020,12(3):12-19. |
| 大体积流变浆料制备与压铸成形一体化工艺及其应用 |
| Integrated Technology and Application of Large Volume Rheological Slurry Preparation and High-pressure Die-casting |
| 投稿时间：2020-04-06 修订日期：2020-05-10 |
| DOI：10.3969/j.issn.1674-6457.2020.03.002 |
| 中文关键词: 大体积流变浆料 流变压铸 Al-Si-Fe合金 气冷搅拌棒 力学性能 |
| 英文关键词: large volume rheological slurry Rheo-HPDC Al-Si-Fe alloy air-cooled stirrer rod mechanical properties |
| 基金项目:国家重点研发计划（2018YFB0704102）；中央高校基本科研业务费专项资金（FRF-TP-18-043A1）；中国博士后科学基金（2019M650486） |
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| 中文摘要: |
| 目的 研究气体流量对ACSR流变压铸Al-Si-Fe合金组织的影响，同时研究与对比流变压铸与传统压铸合金的组织性能。方法 通过改变气体流量制备流变压铸Al-Si-Fe合金，采用光学显微镜、扫描电子显微镜、电子探针、万能试验机等研究了合金的微观组织与拉伸性能。结果 随着气体流量由0提高至6 L/s，流变压铸合金中α1-Al平均尺寸由35.6 μm下降到23.9 μm，形状因子由0.71上升到0.82；与传统压铸合金相比，流变压铸合金的抗拉强度和伸长率分别提高了15%和75%。结论 ACSR流变压铸工艺可以制备出组织细小圆整且力学性能高的铸件。 |
| 英文摘要: |
| The work aims to study the effect of gas flow on the microstructure of air-cooled stirring rod (ACSR) rheological high-pressure die-casting (Rheo-HPDC) Al-Si-Fe alloy, and to study and compare the microstructure and properties of Rheo-HPDC alloy and traditional HPDC alloy. The Rheo-HPDC Al-Si-Fe alloy was prepared by changing the gas flow and the microstructure and tensile properties of the alloy were studied by optical microscope, scanning electron microscope (SEM), electron probe micro analysis (EPMA) and universal testing machine. With the increase of gas flow from 0 L/s to 6 L/s, the average size of α1-Al in the Rheo-HPDC alloy decreased from 35.6 μm to 23.9 μm, and the shape factor increased from 0.71 to 0.82. Compared with the HPDC alloy, the tensile strength and elongation of the Rheo-HPDC alloy were increased by 15% and 75%, respectively. The ACSR Rheo-HPDC process can be used to produce the castings with fine and spherical microstructure and high mechanical properties. |
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