| 模具结构对FGH4096合金挤压变形影响的数值模拟研究 |
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| 引用本文： | 李昌,陈蕾蕾,瞿宗宏,刘奎生,赖运金,梁书锦.模具结构对FGH4096合金挤压变形影响的数值模拟研究[J].粉末冶金技术,2022,40(3):277-283. |
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| 作者姓名： | 李昌 陈蕾蕾 瞿宗宏 刘奎生 赖运金 梁书锦 |
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| 作者单位： | 1.中国航发贵州黎阳航空动力有限公司, 贵阳 550014 |
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| 摘 要： | 采用有限元数值模拟软件与正交试验相结合的方法研究了FGH4096合金包覆热挤压过程，系统分析了模具模角、入口圆角半径和工作带长度对挤压制品有效应变分布、温度分布和挤压载荷的影响。结果表明:模角越大，有效应变分布均匀区域减少，挤压载荷升高，挤压过程中产生的温升效应严重；模角越小，有利于挤压载荷的降低，挤压制品心部温升效应减轻，但心部出现有效应变小于1.500的区域增大。入口圆角半径和工作带长度对挤压制品的有效应变分布、温度分布和挤压载荷影响不大。当模角为45°时，有效应变分布均匀的区域增大，有效应变分布更为均匀。制作挤压模具进行模拟实验验证，结果表明实际挤压过程和数值模拟的数据相吻合，证明模拟参数设置合理，对实际生产具有指导意义。
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| 关 键 词： | 有限元数值模拟 FGH4096 有效应变 热挤压 模具 |
| 收稿时间： | 2021-08-22 |
Numerical simulation study of effect of die structure on the extrusion deformation of FGH4096 alloys |
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| Affiliation: | 1.Guizhou Liyang Aviation Power Co., Ltd., Aero Engine Corporation of China, Guiyang 550014, China2.ERC of 3D Printing Metal Powder Material, Sino-Euro Materials Technologies of Xi’an Co., Ltd., Xi’an 710018, China |
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| Abstract: | A combination of finite element numerical simulation software and orthogonal experiment was used to study the hot extrusion process of FGH4096 alloys. The influence of die angle, entrance fillet radius, and working belt length on the effective strain distribution, temperature distribution, and extrusion load of the extruded products was systematically analyzed. The results show that, with the increase of the die angle, the effective strain distribution area decreases, the extrusion load increases, and the temperature rise effect is serious in the extrusion process. The smaller the die angle, the lower the extrusion load, and the effect of temperature rise in the core of the extruded products is reduced, but the area of effective strain less than 1.500 in the core increases. The radius of the inlet fillet and the length of the working belt have little effect on the effective strain distribution, temperature distribution, and extrusion load in the extruded product. When the die angle is 45°, the area with the uniform effective strain distribution increases and the effective strain distribution becomes more uniform. The extrusion die was made for the simulation experiment verification. In the result, the actual extrusion process and the numerical simulation data are consistent, proving that the simulation parameters are set reasonably, which has the guiding significance for the practical production. |
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