钛及钛合金焊接接头的组织性能和断裂特性

4(1)(2),,;;(3)1..,1995(2):33352..,1991(2):96102.(20010301):,1941,,(453003),,,:PROPERTIES,MICROSTRUCTUREANDFRACTUREBEHAVIOROFWELDEDJOINTSOFTiANDTiALLOYHenanVocation-TechnicalTeachersCollegeWangHuanqinAbstractThemicrostructure,propertiesandimpactfracturetoughnessofweldedjointsofTiandTialloybyusingtungsten-argonarcweldingwerestudied.Themicrostructureofweldzonechangedintolamellaandneedlemicrostructure,thestrengthofweldedjointscouldreachthestrengthlevelofbasematerial.Theplasticityandtoughnesswasalsohigher,therupturefeaturewasmainlyplastic.Keywords:TiandTialloy,welding,structureandproperty,,,,,,,,1TA2()TC4(+)(Ti-6Al-4V),2mm12mm(TIG),3mm2mm,TA212mmV,=45,3mmTC3(Ti-5Al-4V)8,1001,SEM722001(11)1TIG/mmI/AU/Vv/mmmin-1Q/Lmin-1T/t/minTA225880141512015500301213014018201501565050TC42588014151201565030121301401820150158805022.112TA2TC42mm12:,(+),,,,TA2TC4(),TA2,TIG,(2a)TC4,TIG,,(2b),,110021002.22TA2TC42,TA22mm12mm822001(11),b580600MPaTC4,,b900920MPa,TC3(Ti-5Al-4V)2.33TC43a:TC412mm3b:(+),(+),,I.V.Gorynin:,,2/mmb/MPa0.2/MPa5(%)aKV/Jcm-2b/MPa0.2/MPa5(%)aKV/Jcm-2TA2258558258551051551224252758057557654053554032303112500505510460450455181920520520515470466480242524TC429609689708708708751011109609489558908858901414131291090892086086086289107878799209209258908888851112109292903TC43(1),(2),TA2TC4(3)(20010616):,1950,922001(11)