| 7475铝合金大型锻件时效工艺研究 |
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| 引用本文： | 董显娟,李红英. 7475铝合金大型锻件时效工艺研究[J]. 铝加工, 2005, 0(4): 22-26 |
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| 作者姓名： | 董显娟 李红英 |
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| 作者单位： | 中南大学材料科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 测定了7475铝合金双级时效及回归再时效（RRA）工艺状态下的常规拉伸性能和电导率，并通过标准三点弯和圆周切口圆柱试验测定各时效工艺的断裂韧性。从而研究双级时效和RRA工艺对常规力学性能，断裂韧性，电导率和微观组织的影响，结果发现回归再时效工艺并不适用于7475铝合金大型锻件的生产实践。
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| 关 键 词： | 7475铝合金 双级时效 回归再时效（RRA） 断裂韧性 电导率 |
| 文章编号： | 1005-4898（2005）04-0022-05 |
| 收稿时间： | 2004-10-28 |
| 修稿时间： | 2004-10-28 |
Study on Aging Process for Large 7475 Aluminum Alloy Forgings |
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| DONG Xian-juan,LI Hong-ying. Study on Aging Process for Large 7475 Aluminum Alloy Forgings[J]. Aluminium Fabrication, 2005, 0(4): 22-26 |
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| Authors: | DONG Xian-juan LI Hong-ying |
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| Abstract: | Normal stretching property and eletrical conductivity of 7475 aluminum alloy under the conditions of double aging and regression re-aging(RRA) are measured.Fracture toughness at various aging process are measured by standard three-point bend and peripheral cut cylinder test.Thus,the effect of double aging and RRA process on normal mechanical property,fracture toughness,electrical conductivity and microstructure is studied.The result shows that regression re-aging process is not suitable for production of large 7475 aluminum alloy forgings. |
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| Keywords: | 7475 aluminum alloy double aging regression re-aging(RRA) fracture toughness electrical conductivity |
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