JBT 7717-1995 焊接接头 ECO试验方法

J33JB/T77171995ECO1995-06-201996-01-0111ECO()ECO2GB2106(V)GB2649GB2650GB4159JB4291(COD)33.1AKV(J)(kgf)(m)(J)1kgfm9.8J3.2akV/2(J/cm2)3.3ECOakV/2(J/cm2)EK3.4COD()mm3.5BmmtmmWmmai()mma()mmSmmLmmtiVmmFmaxN1995-06-20ECOJB/T771719951996-01-01JB/T771719952FminNFUNimCV(V)KIdMPamsN/mm2(N/m2)KIcMPamiCODmmJiJN/mm44.14.1.1GB26494.1.2GB26504.24.2.110mm10mm55mmVGB26504.2.210mm5mm55mmJB42914.2.3ECOECOCV4.2.1COD(KId)4.2.255.1GB21065.2JB42915.30.005mm66.16.1.1(1)1.5SB(W–a)2sF0.728SB(W–a)2s16.1.2S4W(2)JB/T7717199536.1.36.1.4200Hz6.2GB2106GB41596.3a1ai6.3.1aa=nanii∑=13nain56.3.2ai–titi6.46.4.16.4.2ECO46.4.3(4)5|ai+1–ai|0.25(mm)46.4.4a1~3mm7(ECO)7.1akV7.2EK(aiakV)A()(80)akVakVEKJB/T77171995427.388.1sbakV8.28.3KIciJi8.48.5EKA()akVmamii∑=1kVa=mamii∑=1mJB/T77171995ECOJB/T77171995*2100044*88012301/161/28,00019951019951015004.00