P420Myog quenched thiab tempered siab -lub zog siab lub nkoj steel phaj teev nyob rau hauv European tus qauv EN 10028-6. Nws yog tsim los siv rau hauv kev tsim cov hlab ntsha siab thiab cov boilers ua haujlwm ntawm qhov kub siab, muab cov khoom siv zoo heev xws li lub zog tensile siab, zoo toughness, thiab txaus siab weldability. Nrog rau qhov tsawg kawg nkaus lub zog ntawm 420 MPa, P420M yog haum rau cov ntawv thov uas yuav tsum tau txhim khu kev qha kev ua tau zoo nyob rau hauv siab siab thiab hnyav kev pab cuam tej yam kev mob.
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TS EN 10028-5 P420MTshuaj muaj pes tsawg leeg |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
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P420M |
0,16 |
0,50 |
1,70 |
0,025 |
0,020 |
0,020 |
0,020 |
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Nb |
V |
Ti |
Ni |
Mo |
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0,05 |
0,10 |
0,05 |
0,50 |
0,20 |
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Qib |
P420MM Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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P420M |
mm |
Min Mpa |
Mpa |
Tsawg% |
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6-16 |
420 |
500-660 |
19% |
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16-40 |
400 |
500-660 |
19% |
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40-63 |
390 |
500-660 |
19% |
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P420M txheej txheem yam ntxwv
Tswj cua sov thiab dov: Txais kev tswj qhov kub thiab txias thaum lub sijhawm cua sov (1100-1250 degree) thiab cov txheej txheem dov. Kev tswj dov refines cov qauv nplej zoo, txhim kho cov hlau lub zog tensile thiab toughness thaum kom ntseeg tau tias cov khoom siv sib xws thoob plaws lub phaj.
Quenching-Tempering (QT) Kev kho cua sov: Cov txheej txheem QT nruj raws li lub hauv paus. Kev nrawm nrawm tsim cov qauv zoo martensitic, thaum lub sijhawm tempering tom ntej (550-650 degree) txo cov kev ntxhov siab sab hauv, sib npaug hardness thiab toughness, thiab ua tiav qhov yuav tsum tau 420MPa yam tsawg kawg nkaus lub zog.
Strict Weldability Assurance: Yuav tsum tau preheating (100–150 degree) thiab post-weld heat treatment (PWHT) kom tsis txhob vuam tawg. Matched welding cov ntaub ntawv thiab cov txheej txheem txheem ua kom zoo weld sib koom ua haujlwm, ua tau raws li kev xav tau ntawm lub nkoj siab.
Siab -Kev Tswj Qhov Nto thiab Dimensional: Ua hauj lwm txhaj tshuaj blasting los yog pickling rau descaling, kom ib tug huv si nto nrog zoo txheej adhesion. Cov txheej txheem dov thiab txiav cov txheej txheem tuav nruj me ntsis kam rau ua, ua kom haum rau qhov tseeb ntawm kev ua haujlwm siab -cov kabmob.
Tag nrho -Kev Saib Xyuas Kev Ua Haujlwm Zoo: Koom nrog ntau- theem tshuaj ntsuam xyuas, suav nrog tshuaj lom neeg kev tshuaj ntsuam xyuas, kuaj xyuas qhov tsis haum ultrasonic, thiab kuaj cov cuab yeej cuab yeej. Txhua kauj ruam ua raws li EN 10028-6 cov qauv, lav cov khoom ruaj khov thiab daim ntawv thov kev nyab xeeb.
qhov zoo
Siab zog thiab zoo toughness: P420M muab qhov tsawg kawg nkaus tawm lub zog ntawm 420 MPa, ua ke nrog zoo heev low -kub toughness. Qhov no tso cai rau nws tiv taus siab thiab hnyav loading thaum tswj cov txheej txheem kev ncaj ncees, ua rau nws tsim nyog rau kev siv cov hlab ntsha tseem ceeb.
Weldability zoo heev: Thaum siv cov preheating tsim nyog thiab tom qab-weld cov txheej txheem kev kho cua sov, P420M pom zoo weldability. Qhov no ua kom ntseeg tau kev sib koom ua ke zoo thiab txo qhov kev pheej hmoo ntawm kev sib tsoo txias, uas yog qhov tseem ceeb rau kev tsim cov khoom siv loj thiab nyuaj.
Superior Kub Resistance: Cov hlau tuav ruaj khov kho cov khoom ntawm qhov kub siab, feem ntau txog li 400 degree. Qhov no ua rau nws zoo tagnrho rau boilers, tshav kub exchangers, thiab lwm yam siab - kub kev pab cuam tej yam kev mob.
Zoo Corrosion Resistance: Thaum tsis yog cov hlau tsis muaj hlau, P420M muaj qhov tsim nyog tiv thaiv rau qhov chaw me me, tshwj xeeb tshaj yog thaum coated los yog tiv thaiv zoo. Qhov no txuas ntxiv lub neej kev pabcuam thiab txo cov kev xav tau ntawm kev saib xyuas.
Raws li kev ua tau zoo thiab kev ntseeg siab: Ua tau raws li kev tswj hwm nruj raws li EN 10028-6, P420M ua kom zoo ib yam microstructure, kev ua haujlwm ruaj khov, thiab qhov raug siab. Qhov kev ntseeg siab no yog qhov tseem ceeb rau kev siv kev nyab xeeb-tseem ceeb.
Tus nqi -Kev ua tau zoo: Piv rau siab dua- alloyed steels, P420M muab qhov sib npaug zoo ntawm lub zog, toughness, thiab tus nqi, ua rau tus nqi -kev xaiv zoo rau lub nkoj siab thiab boiler manufacturers.
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
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.
Dab tsi yog qhov cuam tshuam toughness yuav tsum tau rau P420M?
P420M feem ntau yuav tsum muaj qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog ntawm 40 J ntawm -20 degree, txawm hais tias qee qhov kev qhia tshwj xeeb yuav xav tau kev sim ntawm -40℃rau kev pabcuam hauv cheeb tsam arctic lossis txias. Qhov cuam tshuam toughness ua kom muaj kev tiv thaiv rau cov pob txha tawg nyob rau hauv qhov chaw thau khoom, kev xav txog kev nyab xeeb tseem ceeb hauv cov chaw sab nrauv thiab lwm cov qauv loj.
Qhov kev pabcuam siab tshaj plaws rau P420M yog dab tsi?
P420M feem ntau yog siv rau ntawm qhov kev pabcuam kub ntawm -40℃mus txog 300℃. Nyob rau hauv qhov kub thiab txias, nws lub zog thiab toughness yuav degrade, thiab creep yuav muaj kev txhawj xeeb. Rau siab - daim ntawv thov kub, lwm qib lossis cov khoom siv hluav taws xob tiv taus cua sov tuaj yeem tsim nyog dua, nyob ntawm tus qauv tsim thiab kev thauj khoom tshwj xeeb.
P420M ua haujlwm li cas nyob rau hauv siab - kev ntxhov siab?
P420M tuav cov kev ua tau zoo nyob rau hauv siab - cov kev ntxhov siab vim nws cov txiaj ntsig siab thiab lub zog tensile, ua ke nrog cov khoom tsim nyog thiab tawv. Nws zoo -grained microstructure thiab tsis muaj impurity cov ntsiab lus pab tiv thaiv tsis ua hauj lwm ntxov ntxov, txawm nyob rau hauv dynamic los yog cyclic loading, ua rau nws tsim nyog rau cov txheej txheem tseem ceeb nyob rau hauv offshore thiab hnyav engineering.
Dab tsi yog qhov zoo ntawm kev siv P420M hauv qhov hnyav- cov qauv rhiab heev?
Lub zog siab ntawm P420M tso cai rau cov neeg tsim qauv kom txo cov phaj tuab thiab qhov hnyav tag nrho thaum tswj kev ua haujlwm zoo. Qhov no ua rau kev txuag nqi ntawm cov khoom siv, kev thauj mus los, thiab kev teeb tsa, tshwj xeeb tshaj yog nyob rau hauv cov platforms offshore thiab cov khoom siv loj. Nws zoo weldability thiab toughness kuj yooj yim fabrication thiab txhim khu kev ntseeg nyob rau hauv hnyav-sensitive daim ntaub ntawv.
Dab tsi yog qhov hardness ntau ntawm P420M?
P420M feem ntau muaj Brinell hardness ntau ntawm 180 txog 240 HB, nyob ntawm qhov tuab thiab kev kho cua sov. Qhov ntau yam no sib npaug lub zog thiab toughness, muab cov hardness txaus rau hnav tsis kam thaum tsis txhob hnyav hnyav uas tuaj yeem cuam tshuam cov weldability thiab toughness hauv cov ntu tuab.
Cov kev txhim kho yav tom ntej yuav xav li cas rau P420M thiab cov qib zoo sib xws?
Kev tsim kho yav tom ntej rau P420M thiab cov hlau tsis sib xws hauv ntug dej hiav txwv yuav suav nrog kev txhim kho toughness ntawm qhov kub thiab txias, siab zog dua - rau - qhov hnyav piv, thiab txhim kho weldability. Kev nce qib hauv microalloying thiab thermomechanical kev ua haujlwm tuaj yeem ua rau tus nqi ntau dua - siv tau zoo thiab nthuav dav hauv cov cheeb tsam arctic thiab cov dej tob hauv ntug dej hiav txwv, kev txhim kho kev nyab xeeb thiab kev ua haujlwm zoo.
P420M khaws cia thiab tswj tau li cas los tiv thaiv degradation?
P420M daim hlau yuav tsum tau muab cia rau hauv qhov chaw qhuav, npog kom tsis txhob ya raws qhov nqus thiab qhov chaw corrosion. Lawv yuav tsum tau ua tib zoo saib xyuas kom tsis txhob muaj kev puas tsuaj, tshwj xeeb tshaj yog nyob rau hauv huab cua txias thaum lub zog yuav txo tau. Kev nqa thiab stacking kom zoo pab tiv thaiv kom tsis txhob deformation thiab xyuas kom cov khoom tseem nyob rau hauv specification kom txog rau thaum fabrication.
Dab tsi yog qhov ntev ntawm P420M daim hlau?
P420M daim hlau yog tsim nyob rau hauv ntau qhov dav thiab ntev, feem ntau yog li ntawm 1500 hli mus rau 4000 hli nyob rau hauv dav thiab 6000 hli mus rau 12000 hli ntev, nyob ntawm seb lub zeb muaj peev xwm. Thicknesses ntawm 6 hli mus rau 150 hli yog tus qauv. Cov qhov ntev no muab kev yooj yim rau fabricating loj offshore qauv thiab cov khoom siv hnyav.
Dab tsi yog qhov weldability faib ntawm P420M?
P420M raug suav hais tias muaj qhov zoo weldability, haum rau siv nyob rau hauv welded offshore qauv. Nws feem ntau raug cais raws li qhov yooj yim weldable siab - lub zog steel thaum preheating kom zoo, qis - hydrogen consumables, thiab tswj cov cua sov input yog siv. Qhov kev faib tawm no qhia txog nws lub peev xwm los tsim cov pob qij txha nrog kev toughness thiab lub zog.