ASTM A387 Qib 22 Chav Kawm 1 yog ib hom chromium-molybdenum (Cr-Mo) alloy steel phaj tsim rau welded boilers thiab siab -kub siab cov hlab ntsha, muab zoo siab - kub lub zog thiab corrosion kuj, nrog "Class 1" qhia tus qauv tensile lub zog theem thiab haum rau daim ntaub ntawv uas qis dua - qhov kub thiab txias, tsis zoo li qhov kub thiab txias. Nws muaj kwv yees li 2.25% chromium thiab 1.00% molybdenum, ua rau nws zoo tagnrho rau petrochemical, roj & roj, thiab hluav taws xob tsim kev lag luam.
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A387 Gr.22 CL.1Tshuaj muaj pes tsawg leeg |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Cr |
Mo |
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A387 Gr.22 Cl.1 |
0.04-0.15 |
0.50 |
0.30-0.60 |
0.035 |
0.035 |
1.88-2.62 |
0.85-1.15 |
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Qib |
A387 Gr.22 CL.1Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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A387 Gr.22 Cl.1 |
mm |
Min Mpa |
Mpa |
Tsawg% |
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t Tsawg dua lossis sib npaug li 50 |
205 |
415-585 |
18 |
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50<> |
- |
- |
- |
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ua
1. Cov txheej txheem kho cua sov
Raws li ASTM A387 tus qauv, Chav Kawm 1 cov khoom siv yuav tsum tau ua kom muaj lub voj voog thermal kom ua tiav nws cov khoom siv kho tshuab:
Annealing: Cua sov rau qhov kub siab tshaj qhov tseem ceeb thiab txias maj mam hauv qhov cub. Qhov no ua rau qhov qis tshaj hardness thiab siab tshaj ductility.
Normalizing & Tempering:
Normalizing: Cua sov rau kwv yees li 900℃-960℃los kho cov qauv nplej, ua raws li cua txias.
Tempering: Reheating rau qhov tsawg kawg nkaus ntawm 675℃(feem ntau siab dua) los txo cov kev ntxhov siab sab hauv thiab txhim kho toughness.
Accelerated Cooling: Rau cov phaj tuab, kua quenching lossis yuam cua txias los ntawm austenitizing kub tau tso cai los xyuas kom meej cov khoom sib xws los ntawm cov tuab.
2. Cov txheej txheem vuam
Vim nws cov ntsiab lus chromium thiab molybdenum siab, A387 Gr 22 Chav Kawm 1 yog qhov cuam tshuam rau qhov txias txias thiab yuav tsum muaj kev tswj xyuas nruj:
Preheating : Qhov tseem ceeb los tiv thaiv hydrogen -induced cracking. Qhov ntsuas kub zoo li ntawm 150℃txog 250℃nyob ntawm lub phaj thickness.
Interpass Kub: Yuav tsum tau khaws cia nyob rau hauv ib qho chaw tshwj xeeb (feem ntau 200℃-350 degree) txhawm rau tiv thaiv cov qoob loo loj hlob lossis tawv.
Ncej - Kev Kho Hniav Kub (PWHT): Qhov tseem ceeb rau kev txo kev ntxhov siab thiab kev kub ntxhov ntawm Heat Afected Zone (HAZ). Standard PWHT tshwm sim ntawm 680℃txog 720℃rau lub sijhawm raws li cov khoom tuab.
3. Fabrication & Tsim
Kub txoj kev: Ua ntawm 900℃thiab 1100 degree. Yog tias qhov kub thiab txias poob qis dua qhov kev hloov pauv, lub phaj yuav tsum tau rov ua dua -kub kho (Normalized / Tempered) los kho cov khoom.
Cold forming: Ua tau, tab sis yuav tsum muaj kev ntxhov siab tom qab yog tias qhov deformation tshaj qhov txwv tshwj xeeb (feem ntau 3-5%).
4. Cov Lus Qhia Tshwj Xeeb
Rau 2026 cov qauv kev lag luam hauv kev lag luam petrochemical thiab nuclear, kev sim ntxiv feem ntau yuav tsum tau:
Kauj Ruam Txias : Ib qho kev ntsuas kub tshwj xeeb uas siv los ntsuas cov khoom ua kom muaj kev cuam tshuam rau Temper Embrittlement.
Simulated PWHT (SPWHT): Daim coupons xeem yog raug rau hauv chav ntsuas kub mus kuaj kom ntseeg tau tias cov khoom khaws nws cov khoom siv kho tshuab tom qab lub nkoj tsim.
daim ntawv thov
Cov Khoom Siv Hluav Taws Xob:
Nws yog feem ntau siv nyob rau hauv reactors, fractionation kab, thiab tshav kub exchangers uas ua hydrocarbons nyob rau hauv hnyav thermal thiab mechanical tej yam kev mob.
Petrochemical cog:
Cov khoom siv yog siv rau hauv reactors, hloov kho, thiab cov hlab ntsha siab tuav ntau yam tshuaj thiab cov txheej txheem kub kub.
Lub zog tiam:
Nws pom siv nyob rau hauv boiler Cheebtsam, headers, thiab lwm yam siab qhov chaw ntawm thermal fais fab nroj tsuag uas lub sij hawm ntev lub zog ntawm siab kub yog qhov tseem ceeb.
Roj thiab roj ua:
Nws yog siv rau hauv cov khoom sib cais, cov tshuab ntxhua khaub ncaws, thiab cov hlab ntsha siab hauv cov dej ntws thiab nruab nrab, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj hydrogen.
Kev ua tshuaj lom neeg:
Cov hlau yog ua haujlwm nyob rau hauv hydrogenation units thiab lwm yam khoom siv uas yuav tsum tau ua hauj lwm rau high-temperature corrosion thiab kev nyuaj siab.
General Pressure Vessel Fabrication:
Nws raug xaiv rau cov hlab ntsha hnyav thiab cov khoom siv uas muaj zog, weldability, thiab cov qauv kev ncaj ncees yog qhov tseem ceeb ntawm kev tsim qauv.
Tiv tauj peb ntawm beam@gneesteelgroup.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
A387 Qib 22 Chav Kawm 1 yog dab tsi?
Nws yog qis- alloy ferritic steel phaj rau cov hlab ntsha siab, muaj 2.25% chromium thiab 1% molybdenum. Tsim los rau siab - kev pabcuam kub, nws muaj kev nkag tau zoo heev thiab oxidation tsis kam, dav siv hauv petrochemical thiab fais fab kev lag luam.
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm A387 Qib 22 Chav Kawm 1?
Nws cov ntsiab lus tseem ceeb yog 2.00-2.50% Cr, 0.87-1.13% Mo, Tsawg dua lossis sib npaug rau 0.17% C, Tsawg dua lossis sib npaug li 0.50% Si, 0.40-0.65% Mn, nrog cov kab P thiab S. Cov ntsiab lus no txhim khu kev tiv thaiv corrosion siab.
Qhov kev pabcuam siab tshaj plaws ntawm A387 Qib 22 Chav Kawm 1 yog dab tsi?
Nws tuaj yeem tiv taus kev pabcuam txuas mus txog 593℃(1100℃F). Tshaj li qhov ntsuas kub no, nws lub zog creep poob qis heev, ua rau nws tsis tsim nyog rau kev ua haujlwm ntev - lub sij hawm siab - kub.
A387 Qib 22 Chav Kawm 1 puas tuaj yeem ua tau txias-?
Nws tuaj yeem ua tau txias - tsim nrog ceev faj, tab sis preheating yog pom zoo rau cov phaj tuab kom tsis txhob tawg. Tom qab- kev kho cua sov yog xav tau los kho cov khoom siv kho tshuab thiab tshem tawm cov kev ntxhov siab uas seem.
Dab tsi yuav tsum tau zam hauv A387 Qib 22 Chav Kawm 1 ntau lawm?
Tseem ceeb tsis xws luag kom tsis txhob muaj xws li porosity, inclusions, thiab intergranular cracking. Kev tswj nruj ntawm cov txheej txheem smelting thiab kev kho cua sov ua kom cov khoom ua tau raws li cov txheej txheem siab ntawm cov hlab ntsha.
Lub thermal conductivity ntawm A387 Qib 22 Chav Kawm 1 yog dab tsi?
Nyob rau hauv chav tsev kub, nws thermal conductivity yog hais txog 42 W / (m·K), txo me ntsis nrog nce kub. Cov cuab yeej no ua kom muaj kev hloov pauv hluav taws xob zoo hauv kev siv cov khoom siv hluav taws xob.
Dab tsi yog qhov coefficient ntawm thermal expansion ntawm A387 Qib 22 Chav Kawm 1?
Nws muaj linear thermal expansion coefficient ntawm 11.7 × 10⁻⁶ /℃(20-100 degree). Qhov no xav tau kev txiav txim siab hauv kev tsim qauv kom tsis txhob muaj kev ntxhov siab thermal tshwm sim los ntawm kev hloov pauv kub.
Dab tsi yuav tsum tau zam hauv A387 Qib 22 Chav Kawm 1 ntau lawm?
Tseem ceeb tsis xws luag kom tsis txhob muaj xws li porosity, inclusions, thiab intergranular cracking. Kev tswj nruj ntawm cov txheej txheem smelting thiab kev kho cua sov ua kom cov khoom ua tau raws li cov txheej txheem siab ntawm cov hlab ntsha.
Dab tsi yog qhov ductility ntawm A387 Qib 22 Chav Kawm 1?
Nws muaj qhov zoo ductility nrog qhov tsawg kawg nkaus elongation ntawm 22% hauv 50mm. Cov cuab yeej no tso cai rau nws tiv taus me ntsis deformation yam tsis muaj kev tawg, ua kom muaj kev ruaj ntseg hauv siab - cov ntawv thov kev coj tus kheej.
Puas yog A387 Qib 22 Chav Kawm 1 xav tau PWHT tom qab vuam?
Yog lawm, PWHT yog qhov yuav tsum tau ua. Nws feem ntau yog ua tiav ntawm 677-760℃kom txo tau cov weld residual kev nyuaj siab, txhim kho toughness, thiab tiv thaiv hydrogen-induced cracking, kom ntseeg tau tias weld sib koom siab ncaj ncees.
Dab tsi yog qhov ceev ntawm A387 Qib 22 Chav Kawm 1?
Nws qhov ceev yog kwv yees li 7.85 g / cm³, tib yam li cov pa roj carbon zoo tib yam. Qhov no ua rau nws yooj yim los xam qhov hnyav hauv engineering tsim, tsis muaj kev txhawj xeeb ntxiv.
Yuav tsum tau kho cua sov dab tsi rau A387 Qib 22 Chav Kawm 1?
Nws feem ntau undergoes normalizing (899-954 degree) ua raws li tempering (677-760 degree). Cov txheej txheem no refines nplej, txo cov kev ntxhov siab sab hauv, thiab optimizes nws cov cuab yeej cuab tam rau kev siv lub nkoj siab.