Qhov txawv ntawm SA387 Qib 22 Chav Kawm 2 thiab Qib 11 yog dab tsi?
SA387 Qib 22 Chav Kawm 2yog ib qho qub thiab tempered chromium-molybdenum alloy steel phaj nrog nominal muaj pes tsawg leeg ntawm 2.25% chromium thiab 1% molybdenum, tsim los rau siab - kub thiab siab - kev pab cuam siab nyob rau hauv daim ntawv thov xws li hnyav- phab ntsa reactors thiab hydrocrackers qhov twg superior creep zog yog yuav tsum tau muaj zog.
SA387 Qib 11yog ib qho qis dua -alloy chromium-molybdenum steel phaj, feem ntau muaj li ntawm 1.25% chromium thiab 0.5% molybdenum, feem ntau nkag rau hauv qhov qub thiab tempered, siv nyob rau hauv nruab nrab -kub siab hlab ntsha thiab boiler Cheebtsam qhov twg zoo elevated - khoom vaj tse nyob rau hauv tempered nqi. siab dua -qib alloys.
Qhov sib txawv tseem ceeb ntawm SA387 Qib 22 Chav Kawm 2 thiab Qib 11 yog nyob rau hauv lawv cov ntsiab lus chromium thiab qhov ua rau siab - kub lub zog, corrosion kuj, thiab nqi.
| Feature | SA387 Qib 22 Chav Kawm 2 | SA387 Qib 11 |
|---|---|---|
| Lub Npe | 2¼ Chrome - 1 Moly (2.25Cr-1Mo) | 1¼ Chrome - ½ Moly (1.25Cr-0.5Mo) |
| Kev sib xyaw ua ke | Cr: ~ 2.25%, Mo: ~ 1.0% | Cr: ~ 1.25%, Mo: ~ 0.5% |
| Qhov Tseem Ceeb Distinction | Cov ntsiab lus alloy siab dua rau kev ua haujlwm zoo dua. | Tsawg alloy cov ntsiab lus, kev xaiv nyiaj txiag ntau dua. |
| Siab -Tsub Muaj Zog | Qhov tseem ceeb dua creep zog thiab tso cai rau kev ntxhov siab ntawm qhov kub siab. | Zoo, tab sis qis dua Qib 22 ntawm qhov kub siab tshaj ~ 450℃(850℃F). |
| Max. Pab tau Temp. | Txog li ~ 590℃(~ 1100℃F) rau qee qhov kev siv. | Feem ntau mus txog ~ 540℃(~ 1000℃F). |
| Corrosion / Oxidation Resistance | Zoo dua vim muaj cov ntsiab lus chromium ntau dua. Resistant hydrogen nres zoo dua. | Zoo, tab sis tiv taus tsawg dua qib 22 hauv qhov chaw hnyav. |
| Nqi | Siab dua vim cov ntsiab lus alloy ntau dua (Cr & Mo). | Kev lag luam ntau dua, feem ntau yog qhov kev xaiv nyiam thaum nws cov khoom txaus. |
| Cov ntawv thov siv | Heavy-phab ntsa reactors, chav tsev hydrocracker, siab -kub / siab- kev pabcuam hydrogen. | Boiler nruas, kub exchangers, superheater headers, qis dua -kub siab hlab ntsha. |
Yuav xaiv li cas:
Xaiv Qib 22 Chav Kawm 2 thaum:Tus qauv tsim yuav tsum muaj lub zog siab dua ntawm qhov kub siab tshaj 450℃(850℃F), suav nrog siab - kev pabcuam hydrogen (zoo dua tiv thaiv hydrogen nres), lossis xav tau ntau dua oxidation tsis kam nyob rau hauv corrosive flue gases.
Xaiv Qib 11 thaum:Cov kev khiav hauj lwm yog nruab nrab (feem ntau qis dua 450 degree), thiab cov qauv tsim tso cai rau nws qhov kev cia siab qis dua. Nws muaj tus nqi - daws teeb meem zoo rau ntau daim ntawv thov refinery thiab fais fab boiler.
Cov yam ntxwv tseem ceeb:
Ob leeg yog chromium-molybdenum alloy steels rau cov hlab ntsha siab.
Ob leeg muaj nyob rau hauv Chav Kawm 1 (Annealed) thiab Chav Kawm 2 (Normalized & Tempered).
Ob leeg yuav tsum tau ua tib zoo vuam thiab Post-Weld Heat Treatment (PWHT).
Hauv cov ntsiab lus
Qib 22 yog qib siab dua - qib, muaj peev xwm ntau dua (thiab kim dua) alloy siv rau qhov xav tau tshaj plaws - kub / siab- cov kev pabcuam siab, thaum Qib 11 yog cov hlau ua haujlwm rau cov mob hnyav dua qhov uas tus nqi yog qhov tseem ceeb dua. Qhov kev xaiv yog qhov kawg dictated los ntawm tus tsim kub, siab, thiab corrosive ib puag ncig raws li ib tug siv engineering codes (xws li, ASME BPVC).
1. SA387 Qib 22 Chav Kawm 2 yog dab tsi?
SA387 Qib 22 Chav Kawm 2 yog ib qho kev qhia tshwj xeeb rau chromium-molybdenum alloy steel daim hlau feem ntau siv hauv cov hlab ntsha siab thiab lwm yam siab - cov ntawv thov kev pabcuam kub.
2. Cov tshuaj muaj pes tsawg leeg ntawm SA387 Qib 22 Chav Kawm 2 yog dab tsi?
Nws muaj pes tsawg leeg muaj xws li chromium (2.00-2.50%), molybdenum (0.90-1.10%), nrog carbon, manganese, phosphorus, sulfur, thiab silicon ua rau seem.
3. Dab tsi yog cov khoom siv kho tshuab ntawm SA387 Gr 22 Cl 2?
Cov khoom tseem ceeb muaj xws li lub zog tensile yam tsawg kawg nkaus ntawm 515 MPa (75 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm 310 MPa (45 ksi) rau cov phaj siab tshaj 65 hli tuab.
4. Qhov txawv ntawm SA387 Qib 22 Chav Kawm 1 thiab Chav Kawm 2 yog dab tsi?
Thawj qhov sib txawv yog kev kho cua sov; Cov khoom siv hauv chav kawm 2 yuav tsum tau muab nkag rau hauv cov xwm txheej zoo li qub thiab kub ntxhov, thaum Chav Kawm 1 tsis muaj qhov yuav tsum tau ua, cuam tshuam rau nws lub zog thiab microstructure.
5. Qhov kev pabcuam siab tshaj plaws rau SA387 Qib 22 yog dab tsi?
SA387 Qib 22 feem ntau yog siv rau kev pabcuam kub txog li 550℃(1022℃F), tab sis cov kev txwv tshwj xeeb yog nyob ntawm qhov siab thiab kev ntxhov siab.
6. Puas yog SA387 Qib 22 Chav Kawm 2 sib npaug rau lwm qib khoom siv?
Yog lawm, nws yog dav sib npaug rau ASTM A387 Gr22 Cl2, ASME SA387 Gr22 Cl2, thiab cov khoom siv wrought qib UNS K21590.
7. Yuav ua li cas rau vuam SA387 Qib 22 Chav Kawm 2 hlau?
Vuam feem ntau yuav tsum tau ua ntej- cua sov thiab tom qab-weld heat treatment (PWHT). Common filler metals muaj xws li AWS E9015-B3 rau SMAW lossis cov qhab nia sib raug rau lwm cov txheej txheem kom phim lub hauv paus hlau cov khoom.
8. Kev kho cua sov rau SA387 Gr22 Cl2 yog dab tsi?
SA387 Qib 22 Chav Kawm 2 daim hlau tau muab tso rau hauv qhov qub (ntawm 1650-1750℃F) thiab tempered (ntawm 1250-1350℃F) mob kom ua tiav cov khoom siv kho tshuab.
9. Qhov twg yog SA387 Qib 22 Chav Kawm 2 nquag siv?
Nws yog dav siv nyob rau hauv fabrication ntawm siab hlab ntsha, boilers, thiab reactors rau lub hwj chim tiam, petrochemical, thiab roj & roj industries, tshwj xeeb tshaj yog rau cov khoom raug kub thiab siab.
10. Dab tsi yog qhov yuav tsum muaj hardness rau SA387 Qib 22 Chav Kawm 2?
Thaum lub ASTM / ASME specification tsis txwv ib tug hardness, nws yog feem ntau tswj thaum lub sij hawm kho cua sov. Ib qho kev xav tau hauv kev pabcuam yog kom muaj qhov siab tshaj plaws, feem ntau 225 Brinell (HBW) lossis qis dua, txhawm rau tiv thaiv cov teeb meem xws li hydrogen-induced cracking.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
