钢网架球管焊缝超声波探伤

(,650032)ULTRASONICINSPECTIONOFTHEWELDSBETWEENTHEBALLSANDPIPESOFSTEELSPACEGRIDSTRUCTURESNIZhen2xin(FirstInstallationEngineeringCompanyofYunnanProvince,Kunming650032,China):TG115.28+5:B:100026656(2001)1020449203,,(1),,,,,(a)2(b)11,1.1:2000211224,;;,,,1.1.1,,,,,6mm6mm,11mm19mm,5mm1.1.2,,,,5MHz1.1.3K,[1]K:2,d1=a+l0Kd2=bKd1,9442310200110NDTVol.23No.10Oct.2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2d2b,,d1+d2T,Ka+b+l0Ta,mmb,mml0,mmT,mma=4mm,b=2mm,l0=5mm,T=4mm,K2.75,K31.1.4,,,,,,,K1.2[2],33a,2,3b1.3(3a)3mm,80%,,4dB,2:(RL)DAC,(SL)DAC-10dB,(EL)DAC-16dB1.4,(a)(b)3,,JGPT3034.11996,,JGJ71991JGJ781991,1.5(1),;,,,(2),,(3),,;,,,(4),,,,,,,;,054:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.215000,4000,30000,20%,3104857,49,,,3(1)K,,(2),,,,(3),,:[1].[M].:,1996.[2]JGPT3034.11996,[S].(448)42bPMPaP%12300.323270.531440.430CrMnSi108010,,,,4,,,,,YB251977,4,,,,,,2002,,1989,,16,,,64,7,28,(62121):20:300220::[phone]E2mail:[e-mail]154:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.