SA 387 Qib 22 Chav Kawm 2yog ib qho qis- alloy chromium-molybdenum steel phaj rau cov hlab ntsha siab, dav siv nyob rau hauv siab - kub thiab siab - ib puag ncig siab, ua raws li ASTM cov qauv, muab cov cua sov zoo thiab weldability.
SA 387 GR.22 Qib sib npaug:
| BS | ASTM/ASME | UNS | EN | DIN |
| 622-515B | A387/SA 387 | K21590 | 10 ZPO 910 | 10 ZPO 910 |
Tshuaj muaj pes tsawg leeg ntawm SA387 GR.22 CL.2 Phaj
| C | Mn | P | S | Si | Cr | Mo |
| 0.04 - 0.15 | 0.25 - 0.66 | 0.035 | 0.035 | 0.5 max | 1.88 - 2.62 | 0.85 - 1.15 |
Mechanical Properties ntawm SA 387 GR.22 CL.2 Phaj
| Tensile zog | Yield zog | Elongationin 50mm (%) | Txo thaj tsam hauv% |
| 75-100 ksi, 515-690 MPa | 45 Ksi, 310 MPa | 18 | 45 |
ua
1. Melting thiab Refining
Ua los ntawm hluav taws xob arc rauv (EAF) ntxiv rau LF (ladle furnace) thiab VD (nqus degassing) kom ntseeg tau siab purity.
Kev tswj nruj ntawm cov tshuaj muaj pes tsawg leeg kom ua tau raws li ASME SA-387 cov cai.
Cov ntsiab lus tseem ceeb: C 0.05–0.15%, Cr 2.00–2.50%, Mo 0.90–1.10%, P thiab S Tsawg dua lossis sib npaug li 0.025%.
2. Kub ua hauj lwm (Rolling / forming)
Cua sov: Reheat ingots los yog billets rau 1210-1270℃nrog 6-9 teev tuav lub sij hawm rau homogenization.
Rolling: Pib dov ntawm 1040-1160 degree, tiav dov ntawm 800-850 degree.
Kev tswj kom txias: Tom qab dov, maj mam txias hauv cov pawg insulated saum toj no 500℃rau 70-80 teev kom tsis txhob tawg thiab ua kom zoo ib yam microstructure.
Kub sib sau (piv txwv li, hau): Kub rau 930-960 degree, tuav 1.0-1.5 min / mm, ces cua txias.
3. Kev kho cua sov
Normalizing + Tempering (yuav tsum tau xa):
Normalizing ntawm 900-960 degree, cua txias.
Tempering ntawm 680-750 degree, cua txias.
Lub hom phiaj microstructure: Ntau dua lossis sib npaug li 90% bainite.
Quenching + Tempering (yeem):
quenching ntawm 900-930 degree, dej txias.
Tempering ntawm 710-750 degree.
Simulated Post-Kev kho cua sov (PWHT): 690 ± 14 degree, tuav lub sijhawm raws li tuab (feem ntau 8-26 teev).
4. Vuam
Siv tsawg-hydrogen electrodes lossis vuam hlau.
Preheat kub: feem ntau 200-300℃(nws txawv nrog tuab).
Interpass kub: Tsawg dua lossis sib npaug li 350 degree.
Ncej -Kev kho cua sov (PWHT): 675-705 degree, lub sijhawm tuav tsawg kawg nkaus raws li cov khoom tuab.
5. Machining thiab Fabrication
Zoo machinability nyob rau hauv lub normalized thiab tempered mob.
Siv cov cuab yeej ntse thiab nruab nrab txiav ceev.
Tsis txhob overheating thaum lub sij hawm machining los tiv thaiv softening.
6. Kev tshuaj xyuas thiab kev sim
Ultrasonic kuaj (UT) rau daim hlau.
Tensile, cuam tshuam, thiab hardness kuaj.
Kev ntsuam xyuas microstructure.
Hydrogen{0}}induced cracking (HIC) kuaj yog tias xav tau rau kev pabcuam qaub.
General Industrial Applications
Cov hlab ntsha siab thiab tso tsheb hlau luam hauv refineries thiab petrochemical cov nroj tsuag
Reactors, kab, thiab cov khoom siv hluav taws xob ua haujlwm ntawm qhov kub thiab txias siab
Boilers, superheaters, thiab headers nyob rau hauv lub hwj chim boilers thiab pov tseg tshav kub rov qab boilers
Piping Cheebtsam (piping txhawb, flanges, thiab fittings) nyob rau hauv siab -kev pab kub
Cov phaj siab ntawm lub nkoj rau hydrogenation units, hydrocracking units, thiab hydrotreating units
Cov cheeb tsam thov tseem ceeb
1. Roj Refining thiab Petrochemical
Hydrotreaters thiab hydrocrackers (reactors, furnace tubes, thiab cov hlab ntsha cuam tshuam)
Reformers, isomerization units, thiab lwm yam hydrogen -muaj cov txheej txheem units
Cov tshuaj tua kab mob Amine, cov chaw kho cov tshuaj sulfur, thiab lwm yam khoom siv siab -cov txheej txheem kub
2. Kev tsim hluav taws xob
Boiler siab qhov chaw hauv thermal fais fab nroj tsuag (dej phab ntsa, headers, thiab chav nruas)
Cheebtsam nyob rau hauv lub voj voog ua ke fais fab nroj tsuag (kub rov qab chav generators, HRSG)
Nuclear fais fab nroj tsuag auxiliary systems (tsis yog -nuclear siab hlab ntsha thiab tshav kub exchangers)
3. Kev lag luam tshuaj thiab txheej txheem
Tshuaj reactors rau siab - kub thiab siab - cov txheej txheem siab
Thaum tshav kub kub exchangers thiab condensers tuav cov roj kub, chav, los yog txheej txheem kua
Cov hlab ntsha siab rau hydrogen, ammonia, methanol, thiab lwm yam txheej txheem tshuaj synthesis
4. Lwm Daim Ntawv Thov Tshwj Xeeb
Cov khoom siv ua kua qaub (nrog rau qhov tsim nyog HIC / SCC kuaj thiab tswj)
Offshore thiab onshore roj & roj ua khoom siv
High -kub cia tanks thiab cov hlab ntsha siab nyob rau hauv ntau yam kev lag luam sectors
Tau txais cov lus muaj nuj nqis rau SA 387 Qib 22 Chav Kawm 2, Hu rau GNEE Steel.
Lub ntsiab alloy muaj pes tsawg leeg ntawm SA 387 Qib 22 Chav Kawm 2 yog dab tsi?
Nws cov khoom tseem ceeb yog hlau, 2.25% chromium, thiab 1% molybdenum. Cov kab mob xws li carbon thiab manganese tau ntxiv los txhim kho cov khoom siv dag zog thiab kev ruaj ntseg.
Cov ncej dab tsi -weld kev kho cua sov (PWHT) yuav tsum muaj rau SA 387 Qib 22 Chav Kawm 2?
Common PWHT yog tempering ntawm 620-675 degree, tuav rau lub sij hawm txaus los txo cov kev ntxhov siab, txhim kho ductility, thiab kho cov khoom ua tau zoo tom qab vuam.
Dab tsi yog qhov yuav tsum tau ua kom tiav rau SA 387 Qib 22 Chav Kawm 2?
Qhov saum npoo yuav tsum tsis muaj kab nrib pleb, khawb, thiab kab mob. Nws yog feem ntau muab nrog ib tug pickled los yog blasted tag rau zoo weldability thiab txheej adhesion.
Dab tsi yog lub zog tensile ntawm SA 387 Qib 22 Chav Kawm 2 ntawm qhov kub siab?
Ntawm 500 degree, nws lub zog tensile yog li ntawm 250 MPa, maj mam txo nrog qhov kub thiab txias tab sis tseem txaus rau kev tsim siab -temp loads.
Dab tsi yog kev lag luam feem ntau siv SA 387 Qib 22 Chav Kawm 2?
Nws yog dav siv hauv roj thiab roj, petrochemical, tsim hluav taws xob (boilers, turbines), thiab tshuaj ua lag luam rau cov hlab ntsha thiab cov kav dej.
Puas yog SA 387 Qib 22 Chav Kawm 2 puas muaj kev tiv thaiv corrosion zoo?
Nws muaj qhov nruab nrab corrosion tsis kam rau oxidation thiab hydrogen thaum kub kub. Rau cov xov xwm corrosive hnyav, xav tau txheej txheej ntxiv lossis alloying.
Cov txheej txheem kho cua sov rau SA 387 Qib 22 Chav Kawm 2 yog dab tsi?
Feem ntau normalized (890-940 degree) thiab tempered (620-675 degree) kom kho cov qauv nplej, txhim kho lub zog, toughness, thiab seem stability.
SA 387 Qib 22 Chav Kawm 2 puas tuaj yeem tsim los ntawm kev khoov lossis dov?
Yog, nws muaj zoo formability. Kev sib sau kub (siab tshaj 900 degree) yog pom zoo rau cov phaj tuab; Kev ua kom txias yog ua tau nrog kev ntxhov siab zoo tom qab.
SA 387 Qib 22 Chav Kawm 2 puas tuaj yeem siv rau hauv qhov chaw qis -kub?
Nws tsis yog qhov zoo tshaj plaws rau qhov kub qis dua -29 degree. Nws toughness txo qis ntawm qhov kub thiab txias; Lwm qib zoo li SA 387 Qib 11 yog qhov nyiam rau cov xwm txheej cryogenic.
ASTM tus qauv twg tswj hwm SA 387 Qib 22 Chav Kawm 2?
Nws tau tswj hwm los ntawm ASTM A387 / A387M, tus qauv qhia qis- alloy steel phaj rau cov hlab ntsha siab ua haujlwm ntawm qhov kub thiab txias.