Rau qhov tseebP275N steel phajkev txiav txim, peb lub tuam txhab tau npaj thiab nrog cov neeg siv khoom los ua cov ncauj lus kom ntxaws ntawm -kev tshuaj xyuas qhov chaw ntawm lub tshuab steel, tsom rau cov xwm txheej tsim khoom, kev tswj cov txheej txheem, thiab kev kuaj xyuas zoo.
Kev tshuaj xyuas tau ua raws li EN 10028-3 thiab cov txheej txheem kev pom zoo hauv kev txiav txim.
Order thiab Material Identification
Cov khoom kuaj xyuas yog P275N normalized siab hlab ntsha steel phaj. Ua ntej nkag mus rau thaj chaw tsim khoom, tus neeg siv khoom tau txheeb xyuas cov ntaub ntawv hauv qab no:
Hlau qib: P275N
Txheem: EN 10028-3
Kev xa khoom: Normalized (N)
Kub tooj thiab phaj tooj
Plate marking thiab traceability cov ntaub ntawv
Tag nrho cov phaj cim cim tau zoo ib yam nrog cov ntaub ntawv zeb ntau lawm, kom ntseeg tau tag nrho traceability los ntawm steelmaking rau cov khoom tiav.
Steelmaking thiab Slab Quality Control
Kev tshuaj xyuas pib ntawm ntu steelmaking. Cov neeg siv khoom tau tshuaj xyuas:
Hloov steelmaking txheej txheem
Ladle refining thiab tshuaj hloov kho
Sampling txoj kev rau kev ntsuas kub
Slab nto mob thiab kev tswj xyuas zoo
Slabs siv rau P275N kev txiav txim tau tsim los ntawm cov cua sov uas tsim nyog thiab pom pom ua ntej dov. Slab reheating kub tau kaw thiab saib xyuas.
Kub Rolling txheej txheem tswj
Thaum kub dov, cov kev ntsuas hauv qab no tau kuaj xyuas ntawm qhov chaw:
Rolling sij hawm thiab txo tus nqi
Phaj thickness tswj thaum ua tiav dov
Kub tswj ntawm dov tawm
Phaj dav thiab ntev kam rau ua
Cov neeg ua haujlwm tau lees paub tias qhov kev sib tw dov tau hloov kho raws li phaj tuab kom ntseeg tau tias cov khoom siv kho tshuab tsis sib xws thoob plaws lub phaj.
Normalizing Kev kho cua sov
Tag nrho cov P275N daim hlau rau qhov kev txiav txim no tau txais kev kho cua sov kom zoo. Cov neeg siv khoom tau tshuaj xyuas lub tshuab ua kom muaj cua sov thiab tshuaj xyuas cov ntaub ntawv ntawm lub tshuab hluav taws xob, suav nrog:
Qhov kub thiab txias ntau yam
Tuav lub sijhawm
Txoj kev ua kom txias
Cov txheej txheem normalizing tau ua kom cov qauv ua kom zoo dua qub thiab kev ua haujlwm ruaj khov uas xav tau rau kev siv lub nkoj siab.
Chemical Composition Verification
Kev kuaj tshuaj muaj pes tsawg leeg tau ua nyob rau hauv lub zeb kuaj siv cov qauv coj los ntawm tib lub tshav kub.
Table 1: Tshuaj muaj pes tsawg leeg - P275N Steel Phaj (wt.%)
| Element | C | Si | Mn | P | S | Al |
|---|---|---|---|---|---|---|
| EN 10028-3 Kev xav tau | Tsawg dua los yog sib npaug li 0.20 | Tsawg dua los yog sib npaug li 0.40 | 0.80–1.50 | Tsawg dua lossis sib npaug li 0.025 | Tsawg dua lossis sib npaug li 0.015 | Ntau dua lossis sib npaug rau 0.020 |
| Kev Xeem | 0.14 | 0.29 | 1.34 | 0.019 | 0.006 | 0.038 |
Tag nrho cov ntsiab lus tau ua raws li tus qauv yuav tsum tau ua thiab raug kaw rau hauv daim ntawv qhia txog kev ntsuas kub.
Mechanical Property Testing
Kev ntsuam xyuas tshuab tau ua rau ntawm cov qauv kuaj ib txwm tau npaj los ntawm cov phaj tiav.
Table 2: Mechanical Properties ntawm P275N Steel Phaj
| Cov khoom kuaj | Txuj Kev Cai | Kev Xeem |
|---|---|---|
| Yield zog (MPa) | Ntau dua lossis sib npaug li 275 | 322 |
| Tensile zog (MPa) | 410–560 | 468 |
| Elongation (%) | Ntau dua lossis sib npaug 22 | 29 |
| Impact Test | Raws li teev nyob rau hauv kev txiav txim | Dhau |
Cov txiaj ntsig tau lees paub tias muaj zog ruaj khov thiab txaus ductility rau kev tsim cov hlab ntsha siab.
Ultrasonic kuaj thiab kuaj zaum kawg
Txhua lub phaj tiav tau raug kuaj ultrasonic (UT) raws li qib kev soj ntsuam. Tus neeg siv khoom tau soj ntsuam UT cov haujlwm thiab tshuaj xyuas cov ntaub ntawv tshuaj xyuas.
Kev tshuaj ntsuam zaum kawg kuj suav nrog:
Phaj thickness ntsuas
Flatness thiab ntug mob check
Kev tshuaj xyuas qhov zoo
Phaj marking verification
Tsis muaj qhov tsis txaus ntseeg sab hauv raug kuaj pom, thiab txhua daim ntawv tshuaj xyuas tau ua raws li kev lees paub.
Kev Ntsuam Xyuas Cov Neeg Siv Khoom thiab Kev Txais
Tom qab ua tiav qhov kev tshuaj xyuas, tus neeg siv khoom tau tshuaj xyuas tag nrho cov ntaub ntawv cuam tshuam, suav nrog cov ntaub ntawv tsim khoom, cov ntawv ceeb toom kuaj, thiab UT cov txiaj ntsig.
Raws li nyob rau ntawm - qhov kev txheeb xyuas qhov chaw, cov neeg siv khoom tau lees paub tias P275N steel daim hlau ua tau raws li EN 10028-3 cov kev cai thiab kev txiav txim tshwj xeeb, thiab tau pom zoo txuas ntxiv ntawm kev tsim khoom thiab xa khoom.
Peb yuav txuas ntxiv ua raws li cov txheej txheem tswj xyuas kom ntseeg tau tias muaj kev ntseeg siab thiab zoo ib yam ntawm P275N siab nkoj steel daim hlau rau peb cov neeg siv khoom.
