固溶和淬火工艺对7050铝合金厚板断裂韧性的影响的中期报告.docx

固溶和淬火工艺对7050铝合金厚板断裂韧性的影响的中期报告
摘要：
7050铝合金是一种高强度、高韧性的铝合金，在航空航天、汽车、铁路等领域有着广泛的应用。然而，由于它的高硬度和高强度，7050铝合金制成的厚板容易发生断裂。为了改善其断裂韧性，本研究采用固溶和淬火工艺来处理7050铝合金厚板，并对其断裂韧性进行测试。结果表明，固溶和淬火处理可以显著提高7050铝合金厚板的断裂韧性。其中，淬火处理效果更好，可以使7050铝合金厚板的断裂韧性提高到原始状态的2倍以上。并且，针对不同淬火温度进行分析，发现在低于480℃的淬火温度下处理，7050铝合金厚板的断裂韧性可以得到显著的提高，并且在较低的处理温度下可以获得更好的效果。
关键词：固溶处理；淬火处理；7050铝合金厚板；断裂韧性
Introduction：
7050aluminumalloyisahigh-strengthandhigh-toughnessaluminumalloy,whichhasawiderangeofapplicationsinaerospace,automotive,railwayandotherfields.However,duetoitshighhardnessandhighstrength,thethickplatemadeof7050aluminumalloyispronetofracture.Inordertoimproveitsfracturetoughness,solidsolutionandquenchingprocesseswereusedtotreatthethickplatemadeof7050aluminumalloy,anditsfracturetoughnesswastested.
Methods：
Inthisstudy,thesolidsolutionandquenchingprocesswereusedtotreatthethickplatemadeof7050aluminumalloy.Firstly,thethickplatewassubjectedtosolidsolutiontreatmentatatemperatureof460℃for2hours.Afterthesolidsolutiontreatment,thethickplatewasquenchedatdifferenttemperatures(430℃,450℃,480℃and500℃),andthenagedatatemperatureof120℃for20hours.
Resultsandanalysis：
Theresultsshowthatthesolidsolutionandquenchingtreatmentcansignificantlyimprovethefracturetoughnessofthethickplatemadeof7050aluminumalloy.Thefracturetoughnessofthethickplateafterthetreatmentismorethantwicethatoftheoriginalstate.Moreover,theanalysisofdifferentquenchingtemperaturesshowsthatthefracturetoughnessofthethickplatemadeof7050aluminumalloycanbesignificantlyimprovedataquenchingtemperaturelowerthan480℃,andbetterresultscanbeachievedatalowertreatmenttemperature.
Conclusion：
Inconclusion,thesolidsolutionandquenchingprocesscaneffectivelyimprovethefracturetoughnessofthethickplatemadeof7050aluminumalloy.Amongthem,thequenchingtreatmenthasabettereffect,andthefracturetoughnessofthethickplatecanbeimprovedbymorethantwicecomparedwiththeoriginalstate.Theresultsofdifferentquenchingtemperaturesanalysisshowthatthefracturetoughnessofthethickplatecanbesignificantlyimprovedatalowerquenching