6061铝合金焊接接头的组织与性能分析

6061铝合金焊接接头的组织与性能分析内蒙古工业大学材料学院(呼和浩特市010062)SEM6061-T6:,,,,,,,:6061-T6ASTUDYONTHEMICROSTRUCTURESANDPROPERTIESOFTHEWELDED6061ALUMINIUMALLOYJOINTInnerMongoliaUniversityofTechnologyChangYanjun,DongJunhui,ZhangYiAbstractThemetallurgicalstructures,mechanicalpropertiesandfractographsofEBwelded6061-T6aluminumalloyjointwerestudiedbymeansofmetallography,mechanicaltestandSEMtechnology.Theresultsshowedthatthetensilestrengthofthejointwaslowerthanbasemetal.Thetensilestrengthandplasticityofthejointwasdecreasedbybefore-heatingandremelting,inwhichtheplasticitywasaffectedseverely.ThehardnessoftheweldseamandHAZwerealsolowerthanbasemetalandthatofthejointwasalsodecreasedbybefore-heatingandremelting.Thecrystallizingmorphologyontheweldseamwasequiaxedgrainsanddendritesandthatonthefusionareawerecolumnarcrystals.Thereexistedgraincoarseningontheweldseambecauseofbefore-heatingandremelting.Thefractographsofthetensilespecimenswascaststatewithmanysmalldimples.Keywords:aluminumalloy,6061,electronbeamwelding,microstructureandproperty06061-T6Al-Mg-Si,,,,,:¹,;º,;»;¼;½,;¾,,2~4,,,,,,,,,,[1],,,[1~8],6061-T6,6061-T6#21#2006(1)16061-T6,1ER4043,2120mm@100mm@4.8mm,CVE-CW6012,:A:,;B:,;C:,,;D:C()A3,B~D4,,IA-3001,GBPT2651)198956,SHT420SDHD-187.5A,B,C,D,GBPT231)19845616061-T6(%)CuSiFeMnMgZnTiAl0.15~0.40.4~0.8[0.4[0.040.8~1.2[0.04[0.04[0.152ER4043(%)CuSiFeMnMgZnTiAl0.34.5~6.0[0.6[0.04[0.050.040.103AUPkVIbPmAvP(m#min-1)IfPmAPPa553514901@10-44B~DUPkVIbPmAvP(m#min-1)IfPmAPPa55120.45221@10-455250.44901@10-455200.44901@10-422.114,,303MPa;230MPa;76%,0.76215MPa;71%209MPa;69%191MPa,63%160~170MPa,12,,#22#2006(1)272MPa;215MPa;79%189MPa;69%177MPa;65%156MPa,57%110~120MPa,234,,17.8%;8.0%;45%7.1%;40%6.6%;37%5.2%,29%3,,2.26061-T64,,,,,,AB9mm,C13mm,D15mm,,A,BCD42.36061-T65~8,6061-T6,,,,,[9],;;;6061-T6A~C,,,,,,,6061-T6,Mg2SiAl2CuMg[10],,#23#2006(1)5A6B595e,,2.46061-T6#24#2006(1)99b,,,9a,,,,7C8D#25#2006(1)93(1)60616061-T6,,,(2),,,,(3),,,,,,(4),,,1ChenSC,HuangJC.Comparisonofpost-weldmicrostructuresandmechanicalpropertiesofelectronandlaser-beamwelded8090Al-Lialloyplates.MaterialsTransactions,1999,4(10):1039~10782,,,.2519.,2004,14(6):956~9603,,,..,2002,34(6):864~8684,.LC9CS.,1998(12):58~625,,..,1996,6(2):87~926,,..,1997,7(1):69~747,,.SCC.,1990,11(2):91~988DevincentSM,DevletianJH,GedeonSA.Weldpropertiesofthenewlydeveloped2519-T87aluminumarmoralloy.WeldingJour-nal,1988(3):33~439,..:,198710..:,2002(20051030):常艳君,1972年出生,工程师,在读硕士研究生#26#2006(1)