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.
P: Qhia nws siv rau Pressure lub hom phiaj (cov nkoj / boilers).
420: Qhia qhov tsawg kawg nkaus tawm lub zog ntawm 420 MParau thicknesses Tsawg dua los yog sib npaug li 16 hli.
M: Qhia qhov kev xa khoom yog Mechanical -thermally dov (TMCP), uas ua kom zoo dua lub zog thiab weldability yam tsis tas yuav tsum tau kho cua sov ntxiv.
Cov tshuaj muaj pes tsawg leeg ntawm steel P420M (1.8824): EN 10028-5-2003
| C | Si | Mn | Ni | P | S | Mo | V | N | Nb | Ti | Al | - |
| max 0.16 | max 0.5 hli | max 1.7 Nws | max 0.5 hli | max 0.025 | max 0.01 Nws | max 0.2 hli | max 0.1 hli | max 0.02 Nws | max 0.05 Nws | max 0.05 Nws | max 0.02 Nws | Cr+Cu+Mo < 0.6, V+Nb+Ti < 0.15 |
Mechanical zog ntawm steel P420M (1.8824)
| Rm- Tensile zog (MPa) | 500-660 |
| Nominal thickness (hli): | rau 16 | 16 - 40 | 40 - 63 |
| ReH- Yam tsawg kawg nkaus tawm lub zog (MPa) | 420 | 400 | 390 |
| KV- Impact zog (J) transverse, | -20 degree 27 |
0 degree 40 |
+20 degree 60 |
| A- Min. elongation ntawm tawg (%) | 19 |
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 ua kom zoo ib yam khoom siv 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.
High -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 fabrication ntawm siab-cov kabmob.
Tag nrho -Kev Saib Xyuas Kev Ua Haujlwm Zoo:
Koom nrog ntau-theem tshuaj ntsuam xyuas, suav nrog tshuaj lom neeg 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.
Kev siv ntawm P420M
Pressure Vessel Fabrication: Raws li daim ntawv thov tseem ceeb, P420M tau dav siv los ua cov hlab ntsha siab rau tshuaj lom neeg, petrochemical, thiab kev lag luam tshuaj. Nws yog qhov tsim nyog rau cov nkoj khaws cia thiab thauj khoom siab - cov xov xwm siab xws li cov pa roj av, cov khoom siv roj av, thiab cov tshuaj reagents, ua tsaug rau nws lub siab zoo heev - cov kabmob muaj peev xwm.
Boiler thiab Thermal Equipment: Nws yog siv nyob rau hauv manufacturing boiler nruas, tshav kub exchangers, thiab thermal hwj chim chaw nres tsheb Cheebtsam. Cov khoom siv no ua haujlwm ntawm qhov kub thiab txias siab, thiab P420M qhov siab zoo - qhov kub thiab txias ua tau raws li qhov yuav tsum tau ua.
Kev lag luam roj thiab roj: Siv nyob rau hauv onshore thiab offshore roj/gas pipelines, wellheads, thiab sib sau ua ke systems. Nws tiv taus corrosion thiab siab, yoog rau qhov hnyav oilfield ib puag ncig xws li salinity siab thiab kub hloov pauv.
Heavy Machinery Manufacturing: Ua hauj lwm hauv kev tsim cov khoom hnyav- lub luag haujlwm tshuab thav duab, hydraulic kheej kheej, thiab siab- cov khoom tiv taus. Nws lub zog tensile siab ua kom lub tshuab ua haujlwm thauj khoom -cov kabmob muaj peev xwm thiab kev nyab xeeb ua haujlwm.
Nuclear Power Auxiliary Equipment: Siv rau cov tsis yog - cov ntsiab lus siab nyob rau hauv nuclear fais fab nroj tsuag, xws li auxiliary containers thiab pipelines, ua raws li nruj kev nyab xeeb thiab cov cuab yeej cuab tam.
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.
Yog tias koj xav paub ntxiv txog GNEE cov khoom, koj tuaj yeem xa email rau beam@gneesteelgroup.com. Peb zoo siab tshaj los pab koj.
Dab tsi yog cov kev siv feem ntau ntawm P420M hauv cov qauv offshore?
P420M yog siv dav hauv cov tsho, decks, ceg, thiab bracings ntawm ntug dej hiav txwv platforms. Nws kuj tseem pom muaj nyob rau hauv subsea manifolds, riser kev txhawb nqa, thiab lwm yam khoom siv raug kev nyuaj siab thiab corrosive marine tej yam kev mob. Nws lub zog siab thiab toughness tso cai rau txo qhov hnyav thiab txhim kho kev ua haujlwm zoo hauv cov ntawv thov tseem ceeb.
P420M tiv thaiv kev qaug zog hauv kev pabcuam offshore li cas?
P420M nthuav tawm kev qaug zog zoo vim nws lub zog tensile siab, zoo microstructure, thiab cov ntsiab lus tsis tshua muaj. Cov xwm txheej no txo qhov pib thiab nthuav tawm ntawm kev qaug zog tawg nyob rau hauv cyclic loading los ntawm nthwv dej, cua, thiab kev ua haujlwm nyuaj. Cov txheej txheem vuam kom raug thiab tom qab- kev kho vuam txuas ntxiv txhim kho kev qaug zog hauv cov qauv sab nrauv.
P420M muaj kev tiv thaiv corrosion dab tsi?
P420M tsis yog qhov muaj zog corrosion heev- tiv taus thiab tso siab rau cov txheej txheem tiv thaiv, kev tiv thaiv cathodic, lossis lwm cov kab ke hauv marine ib puag ncig. Txawm li cas los xij, nws cov chemistry tswj thiab huv steel ntau lawm txo qhov cuam tshuam rau kev ntxhov siab corrosion cracking thiab txhim kho zuag qhia tag nrho durability thaum ua ke nrog tsim nyog kev tiv thaiv corrosion.
P420M puas tuaj yeem siv rau hauv cov ntawv thov sab nrauv?
Yog lawm, P420M tuaj yeem siv rau hauv cov ntawv thov sab saum toj uas xav tau lub zog siab thiab tawv, xws li cov tshuab hnyav, crane booms, lub nkoj siab, thiab cov khoom siv hauv cov chaw tsim hluav taws xob. Nws weldability thiab zoo mechanical zog ua rau nws muaj ntau yam khoom siv rau kev thov onshore engineering tej yaam num uas qhov hnyav txo thiab kev ntseeg tau yog ib qho tseem ceeb.
Dab tsi yog qhov kev tswj xyuas zoo rau P420M?
P420M ntau lawm yuav tsum muaj kev tswj xyuas nruj, suav nrog kev tshuaj xyuas tshuaj, kev sim tshuab (tensile, cuam tshuam, hardness), tshuaj xyuas ultrasonic, thiab kev kuaj pom. Cov phaj yuav tsum ua kom tau raws li cov kev txwv tshwj xeeb rau cov uas tsis yog-cov khoom siv hlau, qhov loj me, thiab microstructure. Kev ua raws li EN 10225 ua kom muaj kev ua tau zoo ib yam hauv cov qauv sab nrauv tseem ceeb.
Tus txheej txheem xa khoom ntawm P420M yog dab tsi?
P420M feem ntau yog muab rau hauv qhov kub thiab txias (Q&T), qee zaum qhia tias QT. Cov phaj kuj tuaj yeem ua rau normalizing lossis thermomechanical ua nyob ntawm thickness thiab daim ntawv thov. Cov khoom xa tuaj ua kom ntseeg tau tias cov hlau ua tau raws li qhov yuav tsum tau muaj lub zog, toughness, thiab weldability rau offshore thiab lwm yam siab - kev siv.
P420M piv rau P355M steel li cas?
P420M muaj qhov tsawg kawg nkaus tawm lub zog (420 MPa vs . 355 MPa rau P355M) thaum tuav zoo toughness thiab weldability. Qhov no tso cai rau P420M siv rau hauv ntau cov qauv thauj khoom hnyav lossis txo cov phaj tuab thiab qhov hnyav piv rau P355M. Ob qib tau teev tseg hauv EN 10225 rau kev siv sab nrauv tab sis ua haujlwm sib txawv.
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.
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 weldability thiab toughness hauv cov ntu tuab.
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 tau muab cais ua ib qho 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.