Cov Ntawv Thov:
ASTM A131 DH40 yog siv nyob rau hauv kev tsim kho cov nkoj hulls, offshore cov qauv zoo li roj platform, thiab lwm yam khoom siv marine thiab lwm yam muaj zog thiab lub zog yog qhov tseem ceeb.
Cov yam ntxwv tseem ceeb:
DH40 STEEL muaj kev sib npaug ntawm lub zog siab tensile lub zog, thiab tsis kam mus rau qhov kub thiab txias, ua rau nws zoo tagnrho rau cov tub rog lub nkoj.
Koom Haum Niam Tsev:
Dhenh0, nrog rau lwm qib nyob hauv ASTM A131, feem ntau tau lees paub los ntawm kev faib cov koom txoos zoo li cov neeg Asmeskas cov chaw xa khoom (ABS).
Ntau lawm thiab muab khoom:
Tuam txhab uas zoo li TJC Hlau thiab BBN nkoj Steel tshwj xeeb hauv kev muab ANTM A131 DH40 lub thawv hlau ua nkoj.
1. Dab tsi yog thawj qhov txiaj ntsig ntawm DH40 tshaj tus qauv ah40 hauv nkoj?
Teb:
DH40 muabTxhim Kho Tsawg-Kub Kev KubThaum tswjfwm tib lub zog raws li AH AH40:
Zoo tib yam tawm tswv yim lub zog (ntau dua los yog sib npaug rau 390 mpa)
Txoj kev cuam tshuam stricter uas yuav tsum muaj ntawm -20 degree
Txhim kho cov tawgrau Arctic / Ice-Class Cov Tub Rog
Yuav tsum muaj zoo-lis kev coj uaLos ntawm kev tswj dov (al / nb microalloying)
2. Dab tsi cov cuab yeej kho tshuab yuav tsum DH40 daim hlau los ua rau ib ANTM A131?
Teb:Ntawv pov thawj yuav tsum muaj:
| Ntiag tug | Qhov toob kas | Kuaj Tus Qauv |
|---|---|---|
| Paib lub zog | Ntau dua los yog sib npaug rau 390 mpa | ASTM A370 |
| Lub zog tensile | 510-650 MPa | ASTM A370 |
| Elongation (A50) | Ntau dua los yog sib npaug rau 20% | ASTM A370 |
| Charpy v-imch | Ntau dua los yog sib npaug rau 34J @ -20 degree | ASTM A673 (zaus H) |
| Khoov Xeem Ntawv | 180 Qib (2T RADIUS) | ASTM A370 |
(Nco tseg: tuab tsawg dua los yog sib npaug rau 50mm rau cov qauv txheem; Thicker daim phiaj yuav tsum tau kho cov kev kho kom haum)
3. Qhov twg marine cov ntawv thov tshwj xeeb kom muaj dhec0 steel?
Teb:Tseem ceeb siv suav nrog:
Ice-Chav Nyob Rau Hauv Lub Nkoj Hulls(PC4-PC6 pawg)
LNG Carrier Thib Ob Lub Chaw Haujlwm(-40 Degree Service)
Offshore platform txhais cegHauv cov cheeb tsam arctic
Cov Kev Tshawb Fawb Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob
Hnyav-load thaj chawRaug cov huab cua txias
4. Dab tsi ua vuam txheej txheem ntseeg tias DH40's ua tau zoo?
Teb:Cov Txheej Txheem Tseem Ceeb:
Preheating:150-200℃(nyob ntawm cov tuab)
Cov tub lim hlau:AWS E9018-g rau smaw (txuam lub zog)
Thaum tshav kub kub tswj:Tsawg dua los yog sib npaug rau 25 kj / cm (tiv thaiv haz embrittlement)
Tom qab Weld NDT: 100% UT + MT for thickness >25mm
PVTH Lus Pom Zoo: 600-630°C for thickness >30mm
Ntawv pov thawj & Kev tswj kom zoo
Yuav tsum tau teev cov ntaub ntawv:
En 10204 3.2 Daim ntawv pov thawj nrog ladle / proxection
Transverse + ntev charpy kev xeem
Yeem ntsuas:
CTOD testing for thickness >50 hli
HIC / SSC sim rau Sour kev pabcuam
Pom zoo:ABS, DNV GL, LR, NK Class-ntawv pov thawj
Cim npe nrov: ASTM A131 DH40 shrbuilding steel phaj, Tuam Tshoj ASTM A131 DH40 shrbuilding steel phaj manufacturers, lwm tus neeg, Hoobkas
