ASTM A285 qib B rau lub siab ntsha phaj siab

Ntau yam

Dav:Thov nug cov phaj dav dav dua 72 hauv .} lossis ntau dua 120 3}}

Ntev:Thov nug rau phaj ntev tsawg dua li cov npe tsawg kawg lossis ntau dua cov npe siab tshaj .

Cov Khoom Siv Neeg Kho Tshuab

Tensile kev soj ntsuam yog ua nyob rau hauv cov kev taw qhia transverse .

Q1: Yuav ua li cas AstimeM A285 qib b txawv ntawm qib ib?
Siab dua carbon (tsawg dua los yog sib npaug rau 0.22% vs tsawg dua lossis sib npaug rau 0.17%) thiab mangance (0.90%) rau nce zog
Tib lub p / s txwv (p tsawg dua lossis sib npaug rau 0.035%, s tsawg dua lossis sib npaug rau 0.040%)
Tsis muaj cov ntsiab lus tsis sib xws (tseem muaj cov hlua dig cab hlau)
Q2: Cov khoom tseem ceeb ntawm qib B?
Cov Khoom Yuav Tsum Tau Ua
Tensile lub zog 380-515 mpa mpa (55-75 ksi)
Paib lub zog ntau dua los yog sib npaug rau 205 MPa (30 ksi)
Elongation (2 ") ntau dua los yog sib npaug rau 25%
NCO TSEG: ~ 25% muaj zog dua qib A tab sis tsawg dua ductile .
Q3: Puas yog kev cuam tshuam xeem rau ASTM A285 qib b?
Tsis tas yuav tsum tau los ntawm lub neej ntawd
Yog hais tias teev (ib ASTM A20 S5), Charpy V-Ceebtis kuaj:
Yam tsawg kawg 20J (15 ft-lbf) ntawm 16℃(60℃f)
Tseem tsis pom zoo rau subzero kub

Q4: Cov ntawv thov raug rau qib b li cas?
Nruab nrab-siab cov hlab ntsha (tsawg dua los yog sib npaug rau 1.5 MPa tsim siab)
Roj / Dej Cia Tso Tsheb Hlau
Boiler Crushs

Q5: Dab tsi yuav tsum yog nrhiav kev ceev faj txog qib b?
Preheat: 50-100°C for thickness >25mm
Cov Electrodes: E7018 rau smaw, ER70s -6 rau gmaw
PWHT: Yeem hauv qab 32mm Thickness
Kev pheej hmoo: Cov ntsiab lus ntau cov txiaj ntsig ntawm cov ntsiab lus muaj peev xwm ua kom pom tseeb vs me ntsis VS Qib A .