预先热处理对ZAlSi12Cu2Mg1铝合金微弧氧化层的影响  

Effects of pre-heat treatment on microarc oxidation coating of ZAlSi12Cu2Mg1 alloy

作　　者：王晓军[1] 刘向东[1] 刘永珍[1] 韩春霞[1] 刘彩文[1] 杜月和 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]驻447厂军代室,内蒙古包头014033

出　　处：《材料热处理学报》2008年第1期133-136,共4页Transactions of Materials and Heat Treatment

基　　金：内蒙古科技攻关项目(20040202)

摘　　要：对ZAlSi12Cu2Mg1铝合金分别按T1和T6进行预先热处理,然后在NaOH-Na2SiO3电解液体系下进行表面微弧氧化,并对微弧氧化层的结构及性能进行分析。利用电涡流测厚仪测量氧化层的厚度,用显微硬度计测量氧化层截面的显微硬度,并进行截面形貌观察,用XRD分析氧化层相组成。结果表明:在微弧氧化前,该合金进行的预先热处理对后续的微弧氧化影响很显著;在合金表面获得了较厚的微弧氧化层,氧化层与基体互相镶嵌,并结合良好。氧化层主要由α-Al2O3、γ-Al2O3、Al、Al2SiO5及非晶相组成。经T6处理合金所获得的微弧氧化层的结构和性能优于经T1处理的。ZAlSi12Cu2Mg1 alloy was pre-heat treated by T1 and T6 process, respectively, and then the microare oxidation coating was prepared on the pre-heat treated alloy by microare oxidation process in NaOH-Na2SiO3 electrolyte. The microstructure and properties of oxidation coating were investigated. The electric vortex thickness indicater was employed to measure the thickness of the oxidation coatings. The microhardness and crosssectional microstructure of oxidation coatings were tested and observed by microhardness tester. The phases of coatings were analyzed by XRD. The results show that pre-heat treatment of the alloy before microarc oxidation process have important effects on the microare oxidation. The thick oxidation coatings are obtained on the pre-heat treated ZAlSi12Cu2Mg1 alloy. The coating with good binding with substrate mainly consists of α- Al2O3, γ-Al2O3, Al, Al2SiO5 and amorphous phase. The microstructure and property of oxidation coatings of the alloy pre-hoat treated by T6 process are better than that of the alloy pre-heat treated by T1.

关 键 词：微弧氧化层 预先热处理 ZALSI12CU2MG1 

分 类 号：TG174.44[金属学及工艺—金属表面处理]