| 7A04合金半固态触变模锻的组织演化 |
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| 引用本文： | 田文彤,杨辉.7A04合金半固态触变模锻的组织演化[J].锻压技术,2008,33(5). |
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| 作者姓名： | 田文彤 杨辉 |
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| 作者单位： | 常州工学院机电工程学院,江苏常州,213002 |
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| 基金项目： | 江苏省高校自然科学基金，常州工学院自然科学研究项目 |
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| 摘 要： | 研究了SIMA法制备的7A04合金在半固态触变模锻工艺中的组织演化规律.结果表明:在半固态重熔加热过程中,随着加热温度的升高和保温时间的延长,晶粒逐渐球化和长大,且加热温度对重熔加热组织的影响比保温时间大;当将具有此特征的坯料进行半固态触变模锻后,其获得的触变模锻件的显微组织与半固态重熔组织密切相关.当模锻温度达到600℃以上时,模锻件的显微组织变化不大,仍是均匀的近球形的显微组织,而且模锻件各区域的合金成分基本一致.揭示了采用半固态触变模锻工艺可获得形状复杂的高质量制件.
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| 关 键 词： | 7A04合金 触变模锻 组织演化 |
Microstructure evolution of 7A04 alloy in semi-solid state thixoforging |
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| TIAN Wen-tong,YANG Hui.Microstructure evolution of 7A04 alloy in semi-solid state thixoforging[J].Forging & Stamping Technology,2008,33(5). |
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| Authors: | TIAN Wen-tong YANG Hui |
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| Affiliation: | TIAN Wen-tong,YANG Hui(College of Mechanical , Electrical Engineering,Changzhou Institute of Technology,Changzhou 213002,China) |
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| Abstract: | The microstructure evolution of 7A04 alloy made by SIMA method in semi-sold thixoforging process was studied.The results show that the grains are grown up and sphericized with the temperature increase and isothermal holding time prolongation during reheating in semi-solid state.Moreover,the heating temperature has a large influence on the reheating microstructure than that of isothermal holding time.When the billets with the same reheating microstructure are thixoforged,it is found that the microstructure o... |
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| Keywords: | 7A04 alloy thixoforging structural evolution |
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