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X1,2,3(1.100022;2.;3.471031):,()TIGMAGTIG:;;():TG457.5:A:1004244X(2001)06005404,,,,[1]11.1,20500mm,3mm,:,[2]1426L/min,:t=kD2L4ft,D,L,f,k,(1)D50mm,,1(2),2,,,,,(3)(2)3,(4)[1],200mm,,,,,4,,12246200111ORDNANCEMATERIALSCIENCEANDENGINEERINGVol.24No.6Nov.2001X:2000-12-11:,(1963-),,,,,,©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.34(5)[3],5,,,(6),,,6,(7),,,7,(8),,8:,,,,,,5678,,()1.2()[1]()80,(),,,,12500mm,(),,,8001000mm1,21/mmªL/AV/mm/()TGX3082.0-2.61000120-15030T2-4TGX308L2.0-2.61000120-150330-4030-402-4TGX316L2.0-2.61000120-15030T2-4TGX3092.0-2.61000120-150330-4030-402-42CSiMnPSNiCrMo308L0.0180.351.710.0220.00710.1220.12316L0.0200.371.730.0210.00712.3119.252.183090.0590.371.760.0210.00613.1423.61:(1);(2)556:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.;(3);(4)TIG()(),,,33/mmCMnSiNiCrMo3082.0-3.20.061.540.469.3119.6308L2.00.0281.710.459.2619.3316L2.00.0281.630.4713.319.22.31,,,,1.3[4],,,,,1.82.0mm4560A,,,,,,1.41.4.1[5]350mm,,,,,1.4.2TIG[6],,,,,,,,,1.5,,32mm1.0mm,,120s,42s,,,,,;,,,,,,,;,,,10220mm,,16177.8mm,,ª114mm,TIG120mm,,,,,[7][8],GTAW1960,,,Cr-Mo,,,0.10.5mm,300%1.6ABAlfaLaval:,8%10%,,,2%,,,20%,6524©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,9,2%25%,,,5%15%20%,Ar+O2+CO2,MAG2,,44TIGTIGMMAMAG,()TIGMAGN2H2GTAM::[1].().,2000,5.[2].316L.().:,1999,10.[3]G..,1999(1).[4]..,1998(1).[5]..,1997,(1).[6],TIG.,1997(1).[7]TroyPaskell,etal.GTAWfluxweldjointpenetration.WeldingJournal,1997,176(4).[8]BillLucas,etal.ActivationfluximprovingtheperformanceoftheTIGprocess.WeldingandMetalFabrication,2000(2).ProgressinbackingweldtechnologyforstainlesssteeltubesLIZhuoxin1,HUANGPUPing2,WUHongxing3(1.MaterialsInstitution,BeijingUniversityofTechnology,Beijing100022,China;2.ElectromechanicCol2lege,BeijingUniversityofTechnology,Beijing100022,China;3.No.1constructionCompanyofChinaOilandGasIndustry,Luoyang471031,China)Abstract:Theprogressofthebackingweldtechnologyforstainlesssteeltubesisreviewed.Thecharacteristicsandapplica2tionsofallkindsoftechnologiesarepointedout.TheauthorsthinkthatTIGwithflux-coredwire(rod),MAGwiththindiameterwireandgasmixture,aswellasTIGwithsolidwireandgasmixturearepracticalbackingweldtechnologiesinchinaatpresent.Keywords:stainlesssteeltube;backingweld;flux-coredwire(rod)756:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.