钢管整体关联消磁技术

:2002202226;:2002205209:(1973-),,,;(1949-),,,,.254()Vol.25No.420028JOURNALOFHEFEIUNIVERSITYOFTECHNOLOGYAug.2002,,,(,230009):,,,,,,(),,,,,,,,,,,:;;:TM14:A:100325060(2002)0420528203TechniqueofintegralandrelateddemagnetizingofsteeltubesXUMing2liang,HEFu2yun,ZHANGYong,CHENLi2juan(SchoolofComputerandInformation,HefeiUniversityofTechnology,Hefei230009,China)Abstract:Inthesteeltubenondestructiveinspectionbyusingmagnetictechnique,thesteeltubeneedstobemagnetized,thusthemagnetizedsteeltubehasremanence.Thisremanencewillinfluencethesubsequentprocessingandinstallationofthetube,theinstrumentsprecisionandthenormalworkingoftheequipment.Sotheinspectedsteeltubeneedstobedemagnetized.Butthecommondemagnetiza2tiontechniquedoesnotworkwell.Inthispaper,theintegralandrelateddemagnetizingtechniqueisproposed.Thistechniqueisbasedonvectorialresultantofmagneticinduction,andtheoriginaldisor2derstateofmagneticdomainneednotberestored,sothemagnetizinganddemagnetizingcourseofthesteeltubeisconsolidated.Practicalapplicationofthetechniqueprovesthattheequipmentissimple,thepowerconsumptionislow,andthedemagnetizationresultissatisfying.Keywords:thetechniqueofintegraldemagnetizingofsteeltubes;nondestructiveinspection;rema2nence,[1,2],,,,(),,,2,,,,,;,,[3],,,,,,1[4],,2,,,,,,,,,,,,,22.11,,(),1.2.3.12[5],,,,,,,2,,,,33,,,,,,[6],,,,,,1.M2.L333c,,3c,2,LM,,,9254,:2.2,,,,,,50Hz,,11410-4T12347075819564759210245573135,,4210-4T,1.2.V3.4.4,,,,,,,,,2.3,,4,V,,,[6],23,,,,,310-4T,,,,[][1].[J].(),1998,21(1):90-95.[2].[J].,1999,20(1):73-76.[3].[M].:,1987.139-143.[4],.[M].:,1985.223-234.[5].[M]..:,1982.4-5.[6].[M].:,1983.422-458.()035()25