SA387 Qib 11 Chav Kawm 2yog ib qho chromium-molybdenum alloy steel phaj them los ntawm ASME SA387 specification, npaj rau welded siab hlab ntsha thiab kev pab cuam ntawm siab kub. Nws cov ntsiab lus alloy muab nws zoo kub-kub lub zog, creep kuj, thiab toughness, nrog rau zoo weldability, yog li nws yog dav siv nyob rau hauv refineries, petrochemical nroj tsuag, thiab boiler Cheebtsam uas txhim khu kev qha kev ua tau zoo nyob rau hauv tshav kub thiab kev ntxhov siab yog qhov tseem ceeb.
Cov yam ntxwv tseem ceeb:
Cov ntsiab lus tseem ceeb: Kwv yees li 1.00-1.50% Chromium (Cr) thiab 0.45-0.65% Molybdenum (Mo).
Cov khoom: Zoo heev oxidation kuj, corrosion kuj (tshwj xeeb tshaj yog nyob rau hauv qaub roj), siab zog ntawm siab kub.
Chav Kawm 2 Mechanical Properties: Siab zog tensile (75-100 ksi los yog 515-690 MPa) thiab yield zog (min 43 ksi los yog 310 MPa) dua Class 1.
Hom khoom: Chrome-Moly Alloy Steel Phaj.
Daim ntawv thov: Boilers, siab hlab ntsha, tshav kub exchangers, thiab piping rau siab kub kev pab cuam.
Standards & Equivalents:
Raws li ASTM A387 thiab ASME SA387.
tuaj yeem muab cov kev kho cua sov tshwj xeeb xws li Normalized & Tempered (N&T) lossis Quenched & Tempered (Q&T) rau cov mob hnyav dua.
Sa 387 Gr 11 Specification
| Qib | SA 387 Gr 11 khoom |
| Pressure Vessel Phaj Specification | ASME SA387 thiab ASTM A387 Gr 11 Chromium-Molybdenum, Alloy Steel |
| Hu rau peb tus thawj coj muag khoom hauv cov chaw no | Mexico, UAE, Abu Dhabi, Singapore, Indonesia, Malaysia, Canada, USA, Pennsylvania, Fabkis, UK, Qatar, Australia, South Africa |
| Qhov ntev |
Qib 11 Dav:1000mm-4500mm Thickness:5mm-150 hli Ntev:3000mm-18000mm |
| Impact kuaj | -52 ° C |
| Siv |
Cov hlab ntsha siab Welded boilers thiab lwm yam kev siv tshuab |
Cov Khoom Siv Tshuaj Rau ASME SA387 Qib 11 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| SA387 Qib 11 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Kev Ntsuas Kub: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 - 0.80 |
| Product Analysis: | 0.44 - 0.86 | |
| Chromium: | Kev Ntsuas Kub: | 1.00 - 1.50 |
| Product Analysis: | 0.94 - 1.56 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.45 - 0.65 |
| Product Analysis: | 0.45 - 0.70 |
txheej txheem siv
1. Steelmaking thiab Refining
Cov txheej txheem Melting: Cov hlau feem ntau yog tsim los ntawm Electric Arc Rauv (EAF) lossis Basic Oxygen Rauv (BOF).
Refining: Txhawm rau kom ntseeg tau siab purity thiab tsis tshua muaj kev suav nrog, nws dhau mus Ladle Furnace (LF) refining thiab Nqus Degassing (VD). Qhov no yog qhov tseem ceeb rau kev tswj cov tshuaj muaj pes tsawg leeg (nominally 1.25% Chromium thiab 0.5% Molybdenum) thiab txo qis cov kab mob phem xws li Phosphorus thiab Sulfur.
2. Rolling thiab tsim
Kub Rolling: Lub refined steel ingots los yog slabs yog reheated thiab dov rau hauv daim hlau ntawm tej thicknesses siv ib tug hnyav phaj zeb.
Microstructure Control: Kev tswj cov dov tsis tau tswj xyuas kom muaj cov qauv zoo li qub ua ntej kev kho cua sov kawg.
3. Kev kho cua sov (tseem ceeb rau chav kawm 2)
Qhov kev xaiv "Class 2" yog hais txog cov kev xav tau ntawm lub zog tensile (siab dua li Chav Kawm 1), ua tiav los ntawm cov txheej txheem kho cua sov hauv qab no:
Normalizing thiab Tempering (N + T): Cov phaj yog rhuab mus rau qhov kub austenitizing (feem ntau tshaj 900℃/ 1650℃F), cua - txias, thiab ces tempered ntawm qhov tsawg kawg nkaus kub ntawm 1150℃F (620℃).
Quenching thiab Tempering (Q + T): Rau cov seem thicker, ceev kom txias (kua quenching) ua raws li tempering yog siv los xyuas kom meej los ntawm - thickness mechanical zog.
4. Fabrication txheej txheem
Vuam: Vim nws cov ntsiab lus alloy, cov khoom raug cuam tshuam rau qhov txias txias. Fabrication yuav tsum tau preheating (feem ntau yog 150℃mus rau 250 degree) thiab siv tsawg-hydrogen electrodes.
Tom qab-Kev Kho Hniav Kub Kub (PWHT): Yuav tsum tau siv rau feem ntau ntawm cov hlab ntsha siab kom txo tau cov kev ntxhov siab uas seem thiab ua kom zoo dua cov qauv nplej hauv Heat Afected Zone (HAZ).
Txiav: CNC Plasma lossis nplaim taws txiav yog tus qauv, tab sis cov npoo feem ntau xav tau kev sib tsoo kom tshem tawm cov cua sov- cuam tshuam txheej ua ntej vuam.
5. Mechanical Property Requirements
Raws li ASME Tshooj II Tshooj A (SA-387) lossis ASTM A387 / A387M specifications:
Tensile zog: 75-100 ksi (515-690 MPa).
Tawm Zog: Tsawg kawg 45 ksi (310 MPa).
Elongation: Yam tsawg kawg 18% mus rau 22% (nyob ntawm qhov ntsuas qhov ntev).
daim ntawv thov
Cov hlab ntsha siab:
Siv nyob rau hauv welded siab hlab ntsha xav tau lub zog thiab creep tsis kam ntawm qhov kub siab, qhov twg cov khoom ruaj khov thiab tsis kam mus rau thermal cycling yog qhov tseem ceeb rau lub sij hawm ntev - kev cia siab thiab kev nyab xeeb raws li xav tau kev khiav hauj lwm.
Cov cuab yeej siv hluav taws xob:
Siv nyob rau hauv refinery kab, reactors, thiab tshav kub exchangers ua hauj lwm nyob rau hauv siab -kub tej yam kev mob, qhov twg cov ntaub ntawv yuav tsum tiv thaiv tsis tu ncua raug rau tshav kub, siab, thiab ntau yam txheej txheem kua thaum tuav tus txheej txheem kev ncaj ncees thiab txo txoj kev pheej hmoo ntawm deformation los yog tsis ua hauj lwm nyob rau hauv lub neej ncua kev pab cuam.
Petrochemical thiab chemical processing:
Siv rau cov txheej txheem cov hlab ntsha thiab cov kav dej hauv cov nroj tsuag petrochemical thiab cov chaw ua tshuaj, qhov twg cov hlau yuav tsum muaj kev tiv thaiv zoo rau siab - qhov kub thiab txias degradation thiab tswj qhov toughness thiab weldability nyob rau hauv ib puag ncig uas muaj corrosive media thiab cyclic loading.
Boilers thiab boiler Cheebtsam:
Haum rau boiler nruas, headers, thiab lwm yam uas yuav tsum tau kub thiab siab, qhov twg cov khoom yuav tsum muaj zoo heev lub zog tuav ntawm qhov kub thiab txias, nrog rau txaus ductility thiab qaug zog tiv thaiv kom rov qab cua sov thiab txias mus.
Kev tsim hluav taws xob:
Ua haujlwm hauv cov cuab yeej siv hluav taws xob uas siab - qhov kev pabcuam kub thiab kev ntseeg siab yog qhov tseem ceeb, xws li hauv cov khoom raug kub hnyiab thiab kev ntxhov siab, xav tau cov ntaub ntawv uas muaj peev xwm tswj tau qhov kev ua tau zoo thiab kev ruaj ntseg hauv ntau xyoo ntawm kev ua haujlwm.
General high -kev pabcuam kub:
Siv nyob rau hauv ntau yam khoom uas yuav tsum tau ua tsis tu ncua nyob rau hauv sustained cua sov thiab mechanical kev nyuaj siab, nrog rau cov qhov cub tawg, siab- muaj cov qauv, thiab lwm yam hnyav - cov khoom siv ua hauj lwm nyob rau hauv hnyav thermal ib puag ncig.
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.
SA387 Qib 11 Chav Kawm 2 yog dab tsi?
SA387 Qib 11 Chav Kawm 2 yog chromium-molybdenum alloy steel phaj raws li ASME SA387 tus qauv, feem ntau yog rau cov hlab ntsha siab welded thiab siab - kev pabcuam kub. Nws muaj qhov zoo siab - kub lub zog, nkag siab, thiab weldability, ua rau nws tsim nyog rau refineries, petrochemical nroj tsuag, thiab boilers qhov twg txhim khu kev qha kev ua tau zoo nyob rau hauv kub thiab kev ntxhov siab yog yuav tsum tau.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 feem ntau muaj chromium thiab molybdenum, uas txhim kho nws qhov siab - qhov kub thiab txias tsis kam. Cov ntsiab lus no kuj txhim kho hardenability thiab toughness, tso cai rau cov hlau kom tswj cov khoom siv hluav taws xob nyob rau hauv lub caij ntuj sov raug. Cov pa roj carbon thiab manganese tam sim no los txhawb lub zog thiab kev tsim kho, thaum lwm cov khoom seem raug tswj xyuas kom ntseeg tau tias weldability thiab cov qauv ruaj khov.
Cov qauv dab tsi suav nrog SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 tau teev tseg hauv ASME SA387 tus qauv, uas tswj hwm chromium-molybdenum alloy steel daim hlau rau kev siv lub nkoj siab. Nws kuj tau hais txog ntau yam ASME Boiler thiab Pressure Vessel Code ntu, kom ntseeg tau tias ua raws li cov khoom siv, kev sim, thiab kev tsim khoom. Cov qauv kev lag luam ntxiv tuaj yeem raug siv nyob ntawm qhov kawg siv thiab kev tswj hwm txoj cai.
Kev kho cua sov dab tsi feem ntau siv rau SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 feem ntau yog muab rau hauv cov xwm txheej zoo li qub thiab tempered. Normalizing refines cov qauv nplej thiab txhim kho lub zog, thaum tempering txo hardness thiab txhim khu lub toughness, txo qhov kev pheej hmoo ntawm tawg thaum vuam los yog kev pab cuam. Qhov kev kho cua sov no ua kom cov hlau ua tau raws li qhov xav tau ntawm cov khoom siv kho tshuab rau siab - qhov kub siab ntawm cov hlab ntsha.
Dab tsi yog cov khoom siv kho tshuab ntawm SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 nthuav tawm lub zog tensile zoo, lub zog tawm los, thiab kev cuam tshuam toughness, tshwj xeeb tshaj yog nyob rau qhov kub siab. Nws tuav nws lub zog nyob rau hauv lub sij hawm ntev tshav kub raug thiab qhia tau hais tias tsis kam mus creep deformation. Cov hlau tseem muaj qhov tsim nyog ductility thiab qaug zog tiv thaiv, tso cai rau nws los tiv thaiv thermal cycling thiab mechanical stress nyob rau hauv siab hlab ntsha.
Cov ntawv thov tseem ceeb ntawm SA387 Qib 11 Chav Kawm 2 yog dab tsi?
SA387 Qib 11 Chav Kawm 2 yog siv dav hauv cov hlab ntsha siab, cov kab refinery, reactors, thiab kub exchangers. Nws kuj yog tsim rau boiler nruas, headers, thiab fais fab nroj tsuag Cheebtsam ua hauj lwm nyob rau hauv high kub. Nws lub peev xwm los tiv thaiv creep thiab tuav lub zog ua rau nws zoo tagnrho rau petrochemical thiab tshuaj ua cov cuab yeej hauv qhov hnyav thermal.
Vim li cas SA387 Qib 11 Chav Kawm 2 haum rau siab -kev pabcuam kub?
SA387 Qib 11 Chav Kawm 2 muaj chromium thiab molybdenum, uas txhim kho nws cov kev tiv thaiv rau kev nkag thiab siab - kub degradation. Cov alloying ntsiab stabilize lub microstructure thiab tiv thaiv softening nyob rau hauv lub sij hawm ntev tshav kub raug. Cov hlau kev kho cua sov ntxiv txhim kho nws lub zog tuav thiab toughness, ua kom ntseeg tau tias kev ua tau zoo hauv kev nce siab -kub siab ntawm cov hlab ntsha.
SA387 Qib 11 Chav Kawm 2 ua haujlwm li cas hauv vuam?
SA387 Qib 11 Chav Kawm 2 muaj qhov zoo weldability thaum ua raws li cov txheej txheem tsim nyog. Preheating thiab post-weld heat treatment feem ntau pom zoo kom txo cov tawv nqaij thiab tiv thaiv kev tawg hauv tshav kub- thaj tsam cuam tshuam. Kev sib piv cov khoom siv nrog cov ntsiab lus chromium thiab molybdenum zoo sib xws ua kom lub suab welds nrog lub zog txaus thiab tawv rau siab - kev pabcuam kub.
Dab tsi yog qhov txawv ntawm Qib 11 Chav Kawm 1 thiab Chav Kawm 2 hauv SA387?
SA387 Qib 11 Chav Kawm 1 thiab Chav Kawm 2 muaj cov chemistry zoo sib xws tab sis txawv ntawm lub zog tensile thiab toughness. Chav Kawm 2 muaj lub zog ntau dua thiab txhim kho kev cuam tshuam cov khoom, ua rau nws tsim nyog rau kev thov cov hlab ntsha siab. Chav Kawm 1 feem ntau yog siv qhov twg lub zog qis dua tau txais, thaum Chav Kawm 2 nyiam rau cov phaj tuab thiab cov kev pabcuam hnyav dua.
Cov kev ntsuam xyuas zoo li cas ntawm SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 feem ntau dhau mus kuaj ultrasonic txhawm rau txhawm rau kuaj qhov tsis zoo, tensile thiab cuam tshuam los kuaj xyuas cov khoom siv kho tshuab, thiab kev sim hardness kom ntseeg tau tias kev kho cua sov zoo. Tshuaj ntsuam xyuas cov ntsiab lus alloy, thiab radiographic lossis lwm yam kev ntsuam xyuas tsis zoo yuav ua raws li cov neeg siv khoom lossis cov cai yuav tsum tau ua kom muaj kev ncaj ncees.
Dab tsi yog qhov txwv ntawm SA387 Qib 11 Chav Kawm 2?
SA387 Qib 11 Chav Kawm 2 muaj kev txwv tsis pub muaj kev tiv thaiv corrosion nyob rau hauv ib puag ncig corrosive heev thiab tej zaum yuav xav tau kev tiv thaiv ntxiv xws li txheej los yog cladding. Nws tseem tsis tau pom zoo rau qhov kub siab heev uas yuav tsum muaj cov hlau alloy ntau dua. Vuam yuav tsum tau ua tib zoo tswj cov txheej txheem kom tsis txhob tawg, thiab cov seem tuab yuav xav tau kev kho cua sov txuas ntxiv kom ntseeg tau tias cov khoom sib xws.