高温处理对7175铝合金锻件抗应力腐蚀性能的影响

稀有金属, 2001, 25(3): 235-237. doi: 10.3969/j.issn.0258-7076.2001.03.019

高温处理对7175铝合金锻件抗应力腐蚀性能的影响

林高用 ^1, , 张辉 ^2, , 彭大暑 ^3, , 宛亚坤 ^4,

1.中南大学材料科学与工程系,

2.中南大学材料科学与工程系,

3.中南大学材料科学与工程系,

4.东北轻合金有限责任公司,

基金项目: 国家重点基础研究发展计划(973计划)(G19990649008-5)

关键词： 7175铝合金 , 高温处理 , 抗应力腐蚀

Effect of High Temperature Treatment on Property of Stress Corrosion Resistance of 7175 Aluminum Alloy Forging

研究了锻坯高温处理对 7175 铝合金锻件抗应力腐蚀性能的影响，并对其影响机理进行了分析。高温处理可明显提高7175铝合金锻件的抗应力腐蚀性能；含铬析出相及无析出带(PFZ)的形成，是提高该合金抗应力腐蚀性能的根本原因。

The effects of a kind of special high temperature treatment on stress corrosion resistance of 7175 aluminum alloy forgings were studied, and the mechanism of the effects was explained. The results show that this special heat treatment facilitates precipitating of the fine particles containing Cr element and forming of PFZ (Precipitate Free Zone), which obviously enhance the property of stress corrosion resistance of 7175 aluminum alloy forgings.

参考文献

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[2]	Kroger P W .Manufacturing Method of High Strength Aluminum Alloys Forging and Products[P].US:3791876,1972.
[3]	宛亚坤 .7175铝合金T74态锻件研究[D].中南工业大学,2000.
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[5]	刘伯操.五种新型铝合金材料手册[M].北京:航空工业出版社,1994

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