P355GHyog ib qho kev lees paub dav dav dav hlau qib steel qib qhia meej meej hauv European tus qauv EN 10028-2, uas tswj cov hlau rau siab- cov khoom siv bearing. Raws li tsis yog- alloy, nplua-cov qauv hlau, nws nthuav tawm cov kev ua tau zoo tshaj plaws, suav nrog kev ua haujlwm zoo dua los tiv thaiv cov pob txha tawg, zoo weldability tau sib xws nrog ntau yam txheej txheem vuam, thiab txhim khu kev ntseeg siab - kub ua haujlwm uas txhawb nqa kev ua haujlwm ruaj khov hauv nruab nrab-kub. Cov txiaj ntsig zoo no ua rau nws nyiam cov khoom siv rau kev tsim cov hlab ntsha siab, boilers, thiab cov cuab yeej muaj feem xyuam hauv kev lag luam petrochemical, lub zog tsim hluav taws xob, thiab tshuaj lom neeg kev lag luam.
Mechanical Properties
| Hom | Thickness (hli) | Yield zog MPa (min) |
Tensile zog MPa |
Elongation % (min) |
Impact Zog (KV J) (min) |
||
|---|---|---|---|---|---|---|---|
| -20 degree | 0 degree | +20 degree | |||||
| Li qub | Tsawg dua los yog sib npaug li 16 |
355 | 510 - 650 | 21 | 27 | 34 | 40 |
| 16>mus tsawg dua los yog sib npaug li 40 | 345 | 510 - 650 | 21 | 27 | 34 | 40 | |
| 40>kom tsawg dua los yog sib npaug li 60 | 335 | 460 - 580 | 21 | 27 | 34 | 40 | |
| 60>kom tsawg dua los yog sib npaug li 100 | 315 | 490 - 630 | 21 | 27 | 34 | 40 | |
| 100>los tsawg dua los yog sib npaug li 150 | 295 | 480 - 630 | 21 | 27 | 34 | 40 | |
| 150>mus tsawg dua los yog sib npaug li 250 | 280 | 470 - 630 | 21 | 27 | 34 | 40 | |
Tshuaj muaj pes tsawg leeg
| C | 0.10-0.22 Nws |
| Si | Tsawg dua lossis sib npaug li 0.60 |
| Mn | 0.10-1.70 Nws |
| P | 0.025 |
| S | 0.015 |
| Al | Tsawg dua lossis sib npaug li 0.020 |
| N | Tsawg dua lossis sib npaug li 0.012 |
| Cr | Tsawg dua los yog sib npaug li 0.30 |
| Cu | Tsawg dua los yog sib npaug li 0.30 |
| Mo | Tsawg dua lossis sib npaug li 0.08 |
| Nb | Tsawg dua lossis sib npaug li 0.020 |
| Ni | Tsawg dua los yog sib npaug li 0.30 |
| Ti | 0.03 |
| Vi | Tsawg dua los yog sib npaug li 0.02 |
Txheej txheem yam ntxwv ntawm P355GH hlau
P355GH steel nta cov txheej txheem zoo xws li kev yooj yim, kev hloov pauv siab thiab ruaj khov zoo, uas yog qhov zoo - txuam nrog nws daim ntawv thov hauv siab- cov khoom siv bearing. Cov yam ntxwv tseem ceeb ntawm cov txheej txheem yog raws li nram no:
Kev kho cua sov yooj yim: Cov khoom siv hauv paus txais cov txheej txheem kev kho cua sov ib txwm muaj (880-950℃cua sov + cua txias), tsis muaj kev sib tw los yog cov kauj ruam tempering. Cov txheej txheem no yooj yim rau kev khiav lag luam, tus nqi qis, thiab tuaj yeem ua kom zoo dua cov nplej thiab ua kom cov khoom ruaj khov.
Zoo Weld txheej txheem Compatibility: Nws yog sib xws nrog ntau yam pa arc vuam txheej txheem, nrog tsawg preheating yuav tsum tau. Cov phaj nyias nyias tuaj yeem txuas ncaj qha rau ntawm chav tsev kub, thiab cov phaj tuab tsuas yog xav tau qis - kub preheating (80-150 degree), txo vuam nyuaj thiab txhim kho kev tsim khoom.
Cov txheej txheem kev ua tau zoo heev: Ob qhov txheej txheem kub thiab txias yog ua tau. Kub sib sau muaj ntau qhov kub thiab txias thiab zoo plasticity, ua kom yooj yim shaping; txias txoj kev tso cai rau me ntsis deformation, thiab tsuas yog xav tau preheating rau loj deformation, adapting rau ntau yam kev xav tau kev pab cuam.
Stable Machining txheej txheem: Nws cov qauv microstructure kom ruaj khov kev ua haujlwm thaum lub sijhawm ua haujlwm, nrog cov cuab yeej me me thiab kev ua haujlwm siab. Nws tuaj yeem ua tiav los ntawm kev tig, milling, drilling thiab lwm yam txheej txheem, tsis muaj cov cuab yeej tshwj xeeb machining lossis tsis, haum rau ntau lawm.
Tag nrho cov txheej txheem yog mature thiab standardized, kom ntseeg tau tias zoo ib yam khoom zoo thiab high industrial daim ntawv thov feasibility.
P355GH steel daim ntaub ntawv
P355GH yog ntau yam siab lub nkoj steel ua raws li European EN cov qauv, dav siv hauv kev lag luam uas xav tau kev ua haujlwm ruaj khov nyob rau hauv nruab nrab mus rau qhov kub thiab txias. Nws cov ntawv thov tseem ceeb yog raws li hauv qab no:
Boiler Manufacturing: Nws yog cov khoom tseem ceeb rau boiler siab qhov chaw, xws li nruas plhaub, phab ntsa dej, superheater headers thiab downcomers. Cov Cheebtsam no ua haujlwm nyob rau hauv ntev -lub sij hawm siab- kub (txog 400 degree) thiab siab -siab, thiab P355GH qhov zoo heev thermal qaug zog tiv thaiv thiab weldability kom muaj kev nyab xeeb thiab txhim khu kev qha, ua tau raws li cov kev cai nruj ntawm cov fais fab nroj tsuag thiab muaj boiler systems.
Cov nkoj siab: Nws yog dav siv los tsim cov hlab ntsha siab hauv petrochemical, tshuaj thiab tshuaj lag luam. Cov hlab ntsha no khaws lossis thauj cov xov xwm xws li roj, roj, tshuaj thiab chav dej, qhov twg P355GH cov khoom ruaj khov thiab kev tiv thaiv corrosion tiv thaiv kom tsis txhob tawg thiab deformation, hloov mus rau qhov chaw ua haujlwm hnyav nrog qhov kub thiab txias.
Thaum tshav kub kub Exchangers: Nws ua haujlwm raws li cov khoom siv tseem ceeb rau cov khoom siv hluav taws xob sib hloov, cov ntawv raj thiab cov plhaub. Thaum tshav kub kub exchangers yog qhov tseem ceeb rau kev hloov hluav taws xob hauv kev tsim hluav taws xob, tub yees thiab kev lag luam. P355GH qhov zoo thermal conductivity thiab toughness ua kom muaj kev sib pauv cua sov zoo thaum tiv thaiv kev ntxhov siab, txo cov nqi tu thiab ncua kev pab cuam lub neej.
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 lub zog xav tau rau P355GH?
Rau P355GH, qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog yog 30 J ntawm 20℃. Rau cov kev siv qis - kub, qhov kev ntsuam xyuas cuam tshuam tau ua nyob rau ntawm -20 degree, thiab lub zog cuam tshuam yuav tsum ua kom tau raws li tus qauv yuav tsum tau tiv thaiv cov pob txha tawg.
Lub thermal conductivity ntawm P355GH yog dab tsi?
Lub thermal conductivity ntawm P355GH yog hais txog 45-50 W / (m·K) ntawm chav tsev kub. Qhov zoo thermal conductivity no ua rau nws tsim nyog rau cov khoom siv hluav taws xob xws li cov khoom siv hluav taws xob thiab cov boilers, kom ntseeg tau tias muaj kev hloov pauv tau zoo.
Qhov txawv ntawm P355GH thiab Q355B yog dab tsi?
P355GH yog lub nkoj siab steel (EN tus qauv) nrog kev nruj nruj thiab weldability yuav tsum tau rau kev siv siab. Q355B yog Suav tus qauv qauv steel, feem ntau yog siv rau kev tsim qauv engineering, nrog rau kev ua haujlwm qis dua.
P355GH puas tuaj yeem ua kom sov- kho?
Yog lawm, P355GH tuaj yeem raug kho cua sov zoo li normalization, annealing thiab tempering. Normalization txhim kho nws cov qauv nplej thiab toughness, thaum annealing txo hardness thiab txhim kho machinability rau complex ua.
Lub zog tawm los ntawm P355GH ntawm qhov kub thiab txias yog dab tsi?
Lub zog tawm los ntawm P355GH txo qis nrog qhov kub thiab txias. Ntawm 300 degree, nws lub zog tawm los yog li 280-300 MPa, thiab ntawm 400 degree, nws poob rau ib ncig ntawm 220-240 MPa, uas yuav tsum tau txiav txim siab nyob rau hauv high-temperature tsim.
Dab tsi yog qhov yuav tsum tau kuaj rau P355GH tus me nyuam?
Kev kuaj xa tuaj rau P355GH suav nrog tshuaj lom neeg tshuaj ntsuam xyuas, ntsuas tensile, ntsuas lub zog, ntsuas elongation, ntsuas cuam tshuam thiab ntsuas qhov tawv. Qee qhov kev txiav txim yuav xav tau kev ntsuam xyuas ntxiv xws li kev kuaj xyuas qhov tsis haum ultrasonic.
Yuav khaws P355GH daim hlau li cas?
P355GH daim hlau yuav tsum tau muab cia rau hauv qhov chaw qhuav, zoo - qhov chaw tso cua kom tsis txhob ya raws thiab xeb. Lawv yuav tsum tau muab tso rau ntawm cov ntoo txhawb nqa los tiv thaiv kev sib cuag nrog hauv av, thiab npog nrog cov ntaub ntawv tsis muaj dej yog tias khaws cia sab nraum zoov.
Dab tsi yog qhov siab tshaj plaws P355GH tuaj yeem dais?
Qhov siab tshaj plaws ntawm cov kabmob siab ntawm P355GH nyob ntawm cov yam xws li tuab, kev ua haujlwm kub thiab kev tsim qauv. Feem ntau, nws muaj peev xwm dais nruab nrab siab (1-10 MPa) nyob rau hauv ib txwm kub thiab siab hlab ntsha daim ntaub ntawv, raws li kev xam thiab ntawv pov thawj.
Puas yog P355GH ib txwm ua hlau?
P355GH tuaj yeem xa tuaj rau hauv cov xwm txheej zoo li qub, uas yog lub xeev xa khoom ntau. Normalization muaj cua sov cov hlau mus rau 850-950 degree, tuav rau ib lub sij hawm, thiab txias nyob rau hauv cov huab cua kom refine nplej thiab txhim kho toughness thiab lub zog.
Yuav txheeb xyuas cov ntaub ntawv P355GH li cas?
P355GH cov ntaub ntawv tuaj yeem txheeb xyuas los ntawm kev txheeb xyuas cov ntaub ntawv pov thawj (nrog rau qib, tus qauv, tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab), kos npe saum npoo (qib thiab cov ntaub ntawv tsim khoom), thiab ua rau ntawm - qhov chaw tshuaj lom neeg lossis tshuaj ntsuam xyuas yog tias tsim nyog.