汽轮机叶片金属磁记忆诊断技术

,,1),2)(,150030)::;;;;:TG115.28:A:100026656(2002)1020440203METALMAGNETICMEMORYTESTINGOFTURBINEBLADESCHIYong2bin,LIUYu2zhe,HUXian2long,MADe2ju(HeilongjiangElectricPowerResearchInstitute,Harperbin150030,China)Abstract:Theprincipleandapplicationofmetalmagneticmemory(MMM)testingofturbinebladesaredescribed.MMMtestingtechniquecanbeusedfortherapidandaccuratedetectionofthecracksandstressconcentrationinturbineblades.Keywords:Magnetictesting;Turbineblade;Magneticmemorymaterial;Crack;Stressconcentration,,,,(),,,,,Hp,11.1,:20022092041),1000452),110006(2Cr13,3Cr13)[1],,[2],1.23000r/min,,,,,,,,0442410200210NDTVol.24No.10Oct.2002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,1.31,10mmQ235,1aHpP1,P1P1,,Hp(1b),HpP2,Hp,Hp12,,Hp,,,(2),Hp,;Hp=0Hpmax,;Hp=0(2),,Hp,22,,,Hp,,HpmaxHp=0,HpKHp=0LkK,Hp,2LkK=|Hp|2Lk,K32142433aHp1Hp2HpHp=0,200MW31(Hp=0)(4)Hp,,31,4(1),Hp(2)Hp144:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(a)24HpK10(b)1424321424(3)Hp(4)(a)31(b)31HpK=dH/dxK404200MW:[1],,,.[M].:,2000.[2].[Z].:1998.(439)Wavelet,,,Wavelet,,MatlabC++,C++,Wavelet,,7,,,:[1].[A]./[C].:1999.566-569.[2]MorscherGregoryN.ModelacousticemissionofdamageaccumulationinawovenSiC/SiCcomposite[J].Compos2iteScienceandTechnology,1999,59:687.[3],.[A].[C].:2001.32-38.[4],GormanM,.[J].,2000,22(1):38-41.[5].[D].:,2000.[6],,.[J].,1998,13(12):353-356.[7].[D].:,2000.244:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.