Ntau lawm loj: Thickness: 4mm - 400 hli; Dav: 1000mmm - 4000 hli; Ntev: 4000mm - 12000 hli .
Txoj kev ntau lawm: kub dov, annealing, noraling, tempering .
Cov Lus Qhia Kev:
Kev Kho Cua Sov: Ua li qub, Temked, Tempered, Kev Cuam Tshuam, Kev Cuam Tshuam,.. (Tsis Muaj Lwm yam yog tias tsis muab cov kev cai)
Tshuaj lom neeg muaj pes tsawg leeg (%):
|
Qeb / Khoom Siv |
Lub ntsiab |
Muaj pes tsawg leeg (max-a, min-i) |
|
A387 Qib 12 Chav 1 / A387 Gr12 Cl1 |
C |
0.05-0.17 |
|
Mn |
0.40-0.65 |
|
|
Si |
0.15-0.40 |
|
|
P |
0.035 |
|
|
S |
0.035 |
Cov Cuab Yeej Siv Cov Tshuab (Mpa)
|
Qeb / Khoom Siv |
Tensile Xeem |
Ksi / mpa |
|
A387 Qib 12 Chav 1 / A387 Gr12 Cl1 |
Lub zog tensile |
55-80/380-550 |
|
Yield Breengh |
33/230 |
|
|
Elongation |
18% |
|
|
Kev Ntsuas Kev Cuam Tshuam (yog tias muaj) |
|
Q1: Dab tsi yog qhov tseem ceeb siv tau sib xyaw ntawm ASTM A387 qib 12, thiab nws txawv li cas qib 11?
Alloy System: 1.0% cr -0.5% mo (vs . 1.25% mo nyob qib 11)
Tshuaj Tswj Xyuas Kev Tswj Xyuas: Tsawg dua los yog sib npaug rau 0.15% (qis dua qib 11 tsawg dua lossis sib npaug nrog 0.20% rau kev txhim kho weldability
Manganese (mn): 0.30-0.60% (patanced rau lub zog thiab tawv)
* Lub Hom Phiaj: Zoo rau nce-kub hydrogen kev pab cuam nrog zoo formability tshaj qib {}}} *
Q2: Cov khoom ntiag tug yuav tsum muaj cov khoom ntiag tug rau qib 12 chav kawm 1 chav kawm?
| Ntiag tug | Qhov toob kas | Kuaj Tus Qauv |
|---|---|---|
| Lub zog tensile | 415-585 Mpa (60-85 KSI) | ASTM A370 |
| Paib lub zog | Ntau dua los yog sib npaug rau 220 mpa (32 ksi) | ASTM A370 |
| Elongation (2 ") | Ntau dua los yog sib npaug rau 22% | ASTM A370 |
| Charpy cuam tshuam | 279 @ {-30 degree | ASTM A20 S5 (yog tias teev) |
| * Nco tseg: Chav Kawm 1 yuav tsum taunormolized + temperedmob, kom ua kom cov teeb tsa cov teeb tsa microstructure . * |
Q3: Vim li cas qib 12 chav kawm 1 nyiam rau hydrogen kev pab cuam hauv cov roj ntxiv?
Zoo tshaj qhov rau hydrogen embrittlementVim yog cr-mo carbides
Raws li NACE MR0175 / MR0103Rau qaub (h₂s) ib puag ncig
Lub Sij Hawm Ntev Creep KujTsawg dua li lossis sib npaug rau 450℃(842 Qib F)
Cov Kev Siv Raug:
Hydrotreat reassor shells
Kev Kub Kub Kub Kub Kub Hydrogen Piping
Q4: Qhov yuav tsum tau kho cov cua sov thiab kev soj ntsuam li cas?
Kev Kho Cua Sov:
Li no: 900-940 Qib (1650-1725 Qib F) rau cov qoob loo nplej
Npau taws: 650-730 Qib (1200-1350 Qib F) rau kev ntxhov siab thiab kev nyuaj
Yuav tsum tau xeem:
Kev Kuaj Ultrasonic (ut): ASTM A578 Qib II (rau thickness ntau dua lossis sib npaug rau 6 hli)
Charpy V-Ceeb Toom(yog tias teev nyob rau hauv kev xaj xaj)
Kev soj ntsuam hardness: Max 200 HB kom tsis txhob muaj weld tawg
Q5: Yuav ua li cas cov txheej txheem vuam tau pom zoo rau qib 12 chav 1?
Vuam zoo tshaj plaws kev coj ua:
Preheat: 150–200°C (300–400°F) for thickness >12mm
Cov neeg tau txais kev:
SMAW: AWS E {8018- b2 (1.25cr -0.5 mo) rau cov khoom sib piv
GTAW: ER80S-B2 Muab Tub Ntxhais
Tom qab weld kev kho cua sov (pwht): 620-675℃(1150-1250 Qib F) × 1h / 25mm
Ceeb toom tseem ceeb:Tsis txhob muaj ntev ntev raug rau 400-600℃(750-1110℃f) kom tiv thaiv kom npau taws embittlement {}}
Cim npe nrov: A387 Qib 12 rau siab ntsha phaj phaj, Tuam Tshoj A387 Qib 12 rau siab lub nkoj phaj tsim, cov chaw muag khoom, Hoobkas
