论文部分内容阅读
对建筑用2024、6063和7075铝合金型材进行了阳极氧化表面改性和热处理,研究了电流密度、冰乙酸浓度和阳极氧化时间等工艺参数对热处理态表面膜层耐热性和显微硬度的影响,并分析了影响机理。结果表明,不同工艺参数下6063合金和7075合金表面氧化膜层的热开裂性能相当,且都高于2024合金表面氧化膜的热开裂性能;3种合金表面氧化膜的显微硬度从高至低依次为6063合金、7075合金和2024合金;显微硬度的差异与氧化膜的孔隙率和孔壁厚度有关。
Anodized surface modification and heat treatment of 2024, 6063 and 7075 aluminum alloy profiles for construction were conducted. The effects of current density, glacial acetic acid concentration and anodization time on the heat resistance and microhardness Influence, and analyze the impact mechanism. The results show that the thermal cracking properties of 6063 alloy and 7075 alloy oxide film under different process parameters are quite high, and are higher than those of 2024 alloy. The microhardness of oxide film on the three kinds of alloy surface is from high to low Followed by 6063 alloy, 7075 alloy and 2024 alloy; microhardness difference with the oxide film porosity and wall thickness related.