A387 Qib 5 Chav Kawm 2yog chromium-molybdenum siab nkoj steel phaj npaj rau kev pabcuam ntawm qhov kub siab. Nws muaj lub zog zoo thiab ua haujlwm rau kev nkag thiab oxidation, ua rau nws haum rau boilers thiab siab hlab ntsha ua haujlwm nyob rau hauv hnyav thermal tej yam kev mob. Cov khoom yog ua tiav nrog kev tswj chemistry thiab kev kho cua sov kom ntseeg tau tias cov khoom siv kho tshuab txhim khu kev qha.
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A387 Gr.5 CL.2Tshuaj 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.5 Cl.1 |
0.15 |
0.55 |
0.25-0.66 |
0.035 |
0.035 |
3.90-6.10 |
0.40-0.70 |
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Qib |
A387 Gr.5 CL.2Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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A387 Gr.5 Cl.2 |
mm |
Min Mpa |
Mpa |
Tsawg% |
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t Tsawg dua lossis sib npaug li 50 |
310 |
515-690 |
18 |
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50<> |
- |
- |
- |
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ua
1. Steelmaking & Primary processing
Hluav taws xob Arc Rauv (EAF) Melting: Thawj melting ntawm seem thiab alloys.
Ladle Refining (LRF): Precise chemistry adjustment for Chromium (4.0–6.0%) thiab Molybdenum (0.45–0.65%).
Nqus Degassing (VD): Tshem tawm cov pa yaj (Hydrogen, Oxygen, Nitrogen) los tiv thaiv cov hydrogen sab hauv -induced cracking.
Nruam Casting: Casting cov hlau molten rau hauv slabs.
2. Rolling & Slab kho
Reheating: Cov cua sov slabs rau cov txheej txheem dov kub (kwv yees . 1150℃-1250℃).
Kub Rolling: Ntau- hla kev txo kom ua tiav qhov kawg phaj tuab.
Tswj Cooling: Tswj tus nqi cua txias los npaj cov microstructure rau kev kho cua sov.
3. Kev kho cua sov (tseem ceeb rau chav kawm 2 yam khoom)
Txhawm rau ua tiav cov khoom siv kho tshuab tshwj xeeb ntawm Chav Kawm 2 (75-100 ksi tensile lub zog), cov khoom siv:
Normalizing: Cua sov rau ib qho kub ntawm qhov kev hloov pauv thiab cua txias hauv huab cua kom kho cov qauv nplej.
Tempering: Reheating rau qhov kub hauv qab qhov kev hloov pauv (min{0}}℃F / 620℃) kom ua tiav qhov xav tau ductility thiab toughness.
Accelerated Cooling (Yeem): Qee zaum siv yog tias cov tuab yuav tsum tau ua kom txias kom tau raws li cov lus qhia tshwj xeeb.
4. Fabrication & Machining
Oxy- Roj / Plasma Txiav: Ua kom cov phiaj xwm rau qhov loj me.
Ntug Kev Npaj (Milling): Tsim U-groove lossis V-groove bevels rau vuam.
Khoov / Rolling: Txias los yog kub ua rau hauv cylindrical plhaub rau cov hlab ntsha.
5. Vuam & PWHT (Post- Weld Thaum tshav kub kub kho)
Preheating: Yuav tsum tau preheating (feem ntau 200℃-300 degree) yuav tsum tau ua ntej vuam los tiv thaiv Martensite tsim thiab tawg.
Vuam txheej txheem: Cov txheej txheem feem ntau suav nrog Submerged Arc Vuam (SAW) lossis Gas Tungsten Arc Vuam (GTAW) siv qhov sib txuam Cr-Mo fillers.
Tshaj tawm -Kev Kho Hniav Kub Kub (PWHT): Yuav tsum tau ua kom sov so kom txo tau cov kev ntxhov siab uas seem thiab ua rau lub tshav kub cuam tshuam (HAZ).
6. Kev Ntsuas & Kev Tswj Xyuas Zoo (QC)
Kev Ntsuas Ultrasonic (UT): Ua raws li ASTM A435 lossis A578 txhawm rau txheeb xyuas cov laminations sab hauv.
Mechanical Testing: Tensile, Yield, thiab Charpy V-Ntch impact tests.
PMI (Positive Material Identification): Kev txheeb xyuas cov ntsiab lus alloy ua ntej xa khoom.
Hardness Survey: Xyuas kom cov khoom tsis pub dhau Brinell txwv.
7. Ua tiav
Kev Txhaj Tshuaj Txhaum Cai: Tshem tawm cov nplai zeb thiab oxidation.
Txheej Txheej: Siv cov tshuaj tiv thaiv xeb ib ntus lossis primers.
daim ntawv thov
Weldable Pressure Vessels thiab Industrial Boilers:
Nws yog dav siv nyob rau hauv manufacturing weldable siab hlab ntsha thiab muaj boilers, cov khoom tseem ceeb rau petrochemical, lub zog tsim thiab tshuaj sectors. Nws zoo heev - qhov kub thiab txias ua haujlwm lav kev ua haujlwm ruaj khov nyob rau hauv ntev - lub sij hawm thermal loads, tiv thaiv deformation los yog tsis ua hauj lwm los ntawm huab cua kub thiab siab.
Sour Service Ib puag ncig:
Cov hlau hlau phaj no ua tau zoo nyob rau hauv qhov chaw qaub uas muaj hydrogen sulfide. Nws tiv thaiv hydrogen-induced cracking thiab sulfide kev nyuaj siab corrosion, kom ntseeg tau tias cov cuab yeej muaj kev ruaj ntseg ua hauj lwm nyob rau hauv hnyav roj thiab roj extraction thiab ua scenarios.
Ntau daim ntawv thov:
Tshaj li cov kev lag luam tseem ceeb, nws yog siv rau hauv cov khoom siv thermal ua, siab -cov kav dej kub thiab cov tshuaj tiv thaiv cov hlab ntsha. Nws hloov mus rau ntau hom kev ua haujlwm hnyav, dhau los ua cov khoom siv rau siab - kub thiab siab - siab siv kev lag luam.
Kev siv roj av:
Nws yog qhov tsim nyog rau kev xa cov pa roj, khaws cia thiab ua cov khoom siv. Rau cov pa roj carbon monoxide, cov pa roj carbon monoxide thiab lwm yam kev lag luam gases, nws tiv taus cov xov xwm corrosion thiab siab, kom ntseeg tau tias kev thauj mus los thiab kev siv roj zoo.
Tau txais cov nqe lus hais txog A387 Qib 5 Chav Kawm 2, Hu rau GNEE Steel.
ASTM A387 Qib 5 Chav Kawm 2 piv rau ASTM A387 Qib 11 Chav Kawm 2 li cas?
ASTM A387 Qib 5 Chav Kawm 2 muaj cov ntsiab lus chromium thiab molybdenum qis dua qib 11 Chav Kawm 2, uas ua rau qis qis qis dua - qhov kub thiab txias tsis kam. Qib 11 Chav Kawm 2 yog qhov zoo dua rau kev siv siab dua -kub thiab siab dua - kev siv siab, thaum Qib 5 Chav Kawm 2 yog siv rau cov mob hnyav me ntsis.
Dab tsi yog qhov txawv ntawm ASTM A387 Qib 5 Chav Kawm 2 thiab ASTM A387 Qib 22?
ASTM A387 Qib 5 Chav Kawm 2 muaj cov ntsiab lus qis dua piv rau Qib 22, uas muaj cov chromium thiab molybdenum ntau dua. Qib 22 muaj lub zog nkag siab zoo dua thiab siv rau hauv qhov hnyav dua siab dua - qhov kub thiab txias, thaum Qib 5 Chav Kawm 2 yog siv hauv cov kev pabcuam thermal tsawg dua.
Dab tsi thickness ntau yog ASTM A387 Qib 5 Chav Kawm 2 muaj nyob rau hauv?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau yog tsim nyob rau hauv thicknesses ntawm 1/4 nti mus rau ob peb nti. Cov phaj tuab yuav xav tau kev kho cua sov ntxiv kom ntseeg tau tias cov khoom siv kho tshuab tsis sib xws thoob plaws hauv ntu, tshwj xeeb tshaj yog rau kev siv lub nkoj siab.
Dab tsi yog cov ntsiab lus tseem ceeb hauv ASTM A387 Qib 5 Chav Kawm 2?
ASTM A387 Qib 5 Chav Kawm 2 muaj chromium thiab molybdenum ua cov ntsiab lus alloying, uas txhim kho nws qhov siab - kub lub zog thiab corrosion kuj. Cov pa roj carbon, manganese, silicon, thiab cov khoom me me ntawm lwm cov ntsiab lus tseem tuaj yeem ua kom zoo dua weldability thiab kev ua haujlwm txhua yam thaum tsim khoom thiab kev pabcuam.
Lub zog tensile ntau yam ntawm ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau muaj lub zog tensile ntawm 60 ksi thiab 80 ksi. Qhov ntau yam no muab qhov sib npaug ntawm lub zog thiab kev ua haujlwm zoo, ua rau nws tsim nyog rau cov khoom siv ntawm cov hlab ntsha uas ua haujlwm nyob rau hauv nruab nrab mus rau siab - qhov kub thiab txias.
Cov qauv dab tsi tswj kev xeem ntawm ASTM A387 Qib 5 Chav Kawm 2?
Kev ntsuam xyuas ntawm ASTM A387 Qib 5 Chav Kawm 2 yog tswj hwm los ntawm ASTM cov qauv, suav nrog kev ntsuas tensile, khoov, thiab kev ntsuas cuam tshuam. Cov kev xav tau ntxiv yuav raug teev los ntawm ASME Boiler thiab Pressure Vessel Code thaum siv hauv kev tsim cov hlab ntsha uas tau lees paub.
Lub zog tensile ntau yam ntawm ASTM A387 Qib 5 Chav Kawm 2 yog dab tsi?
ASTM A387 Qib 5 Chav Kawm 2 feem ntau muaj lub zog tensile ntawm 60 ksi thiab 80 ksi. Qhov ntau yam no muab qhov sib npaug ntawm lub zog thiab kev ua haujlwm zoo, ua rau nws tsim nyog rau cov khoom siv ntawm cov hlab ntsha uas ua haujlwm nyob rau hauv nruab nrab mus rau siab - qhov kub thiab txias.
Dab tsi yog qhov tsawg kawg nkaus lub zog yuav tsum tau rau ASTM A387 Qib 5 Chav Kawm 2?
Qhov tsawg kawg nkaus tawm lub zog rau ASTM A387 Qib 5 Chav Kawm 2 feem ntau yog 30 ksi. Qhov no ua kom ntseeg tau tias cov khoom tuaj yeem tiv taus qhov tseem ceeb sab hauv thiab kev thauj khoom yam tsis muaj kev deformation ntau dhau nyob rau hauv siab - qhov chaw ua haujlwm kub.
Dab tsi yog qhov ceev ntawm ASTM A387 Qib 5 Chav Kawm 2?
Qhov ceev ntawm ASTM A387 Qib 5 Chav Kawm 2 yog kwv yees li 0.284 lb/in³, zoo ib yam li lwm cov pa roj carbon thiab qis - alloy steels. Qhov ntom ntom no yog siv los ntsuas qhov hnyav rau cov khoom siv ntawm lub nkoj siab thiab cov qauv tsim.