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| 挤压速度对Ti3Al基合金包套挤压过程影响的数值模拟 |
| Numberical Simulation on Effect of Extrusion Speed on Sheathed Extrusion Process of Ti3Al-Based Alloy |
| Received:March 07, 2017 Revised:May 10, 2017 |
| DOI：10.3969/j.issn.1674-6457.2017.03.006 |
| 中文关键词: Ti3Al基合金 包套挤压 挤压速度 数值模拟 |
| 英文关键词: Ti3Al-based alloy sheathed extrusion process extrusion speed numberical simulation |
| 基金项目: |
| Author Name | Affiliation | | LIU Shi-biao | Nanchang Hangkong University, Nanchang 330063, China | | WANG Ke-lu | Nanchang Hangkong University, Nanchang 330063, China | | LU Shi-qiang | Nanchang Hangkong University, Nanchang 330063, China | | LI Xin | Nanchang Hangkong University, Nanchang 330063, China | | XU Qiu-xi | Nanchang Hangkong University, Nanchang 330063, China |
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| 中文摘要: |
| 目的 研究挤压速度对Ti3Al基合金包套挤压过程的影响规律。方法 利用数值模拟技术在Deform-2D有限元软件中模拟Ti3Al基合金的包套挤压过程。结果 挤压速度越大，坯料及包套的温度和等效应变越高，并且坯料成形的挤压比也越大；在模拟的挤压速度范围内，挤压速度对坯料的等效应力场和模具载荷影响较小。结论 选择挤压速度时应使坯料温度和应变速率有良好匹配，这样可以提高坯料成形的均匀性，降低模具载荷以及坯料所受到的应力，为Ti3Al基合金的包套挤压开坯过程提供参考。 |
| 英文摘要: |
| The paper aims to study influence rule of extrusion speed on sheathed extrusion process of Ti3Al-based alloy. The sheathed extrusion process of Ti3Al-based alloy was simulated using numberical simulation technique in Deform-2D finite element software. The higher the extrusion speed was, the higher temperature and effective strain of billets and sheath were, and the larger extrusion ratio of billets forming was; the extrusion speed had minor influence on equivalent stress field of billets and die load within the scope of simulated extrusion speed. The extrusion speed must be controlled to obtain a good match between temperture and strain rate of billets, so as to further improve uniformity of billets forming, reduce die load and stress of billets, and provide reference for sheathed extrusion cogging process of Ti3Al-based alloy. |
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