本文關(guān)鍵詞： 鋁合金 雙輥鑄軋 固溶處理 顯微組織 力學(xué)性能　出處：《金屬熱處理》2017年01期 　論文類型：期刊論文

【摘要】：通過(guò)雙輥鑄軋法制備了2.41 mm厚的7075鋁合金薄板,采用金相顯微鏡、UTM5305電子萬(wàn)能試驗(yàn)機(jī)及維氏硬度計(jì)等研究了單級(jí)固溶處理對(duì)該鑄軋板顯微組織和力學(xué)性能的影響。結(jié)果表明:固溶處理后鑄軋7075鋁合金表層細(xì)長(zhǎng)枝晶及心部等軸晶均再結(jié)晶變成細(xì)小等軸晶,第二相減少。7075鋁合金的拉伸性能和硬度隨著固溶時(shí)間和溫度的增加先上升后下降,并且最大值均出現(xiàn)在470℃固溶1 h時(shí),此時(shí)抗拉強(qiáng)度為351.69 MPa,硬度為140.3 HV0.2。因此,470℃固溶1 h為7075鋁合金最佳單級(jí)固溶制度。
[Abstract]:A 2.41 mm thick 7075 aluminum alloy sheet was prepared by double roll casting. The effect of single stage solution treatment on the microstructure and mechanical properties of the cast rolling plate was studied by means of metallographic microscope UTM5305 electronic universal tester and Vickers hardness tester. The results show that the thin branches of 7075 aluminum alloy surface after solid solution treatment are cast and rolled. The recrystallization of both crystal and core equiaxed crystal becomes fine equiaxed crystal. The tensile properties and hardness of the second phase reduced. 7075 aluminum alloy first increased and then decreased with the increase of solution time and temperature, and the maximum values appeared at 470 鈩，

本文編號(hào)：1521050