Los xyuas kom meej qhov kev ua tiav ntawm covP275N steel phajkev txiav txim, peb lub tuam txhab tsis ntev los no tau nrog cov neeg siv khoom mus rau lub tshuab steel rau ntawm -kev tshuaj xyuas qhov chaw tsim khoom thiab cov txheej txheem tswj kom zoo.
Kev tshuaj xyuas tau tsom mus rau qhov tseeb tsim khoom ntawm P275N daim hlau thiab kev pov thawj ntawm kev ua raws li EN 10028-3.
P275N Steel Phaj Ntau Lawm Txheej Txheem
Cov khoom kuaj xyuas yog P275N normalized siab hlab ntsha steel phaj, ua los ntawm nruam casting slabs. Txoj kev tsim khoom tau ua raws li cov qauv zeb kev coj ua, suav nrog kub dov thiab normalizing kev kho cua sov. Phaj tuab, dov kub, thiab txias txias tau kaw thaum lub sijhawm tsim khoom.
Cov neeg siv khoom tau tshuaj xyuas cov ntaub ntawv tsim khoom thiab cov cim qhia cim npe kom paub meej tias tus lej xov tooj cua sov traceability los ntawm steelmaking mus rau daim hlau tiav.
Cov txheej txheem tsim khoom tseem ceeb tau pom
Thaum lub sij hawm mus ntsib lub Hoobkas, cov neeg siv khoom tau tshuaj xyuas cov txheej txheem hauv qab no ncaj qha rau ntawm qhov chaw:
Hloov steelmaking thiab ladle refining
Slab reheating thiab ntxhib dov
Tiav dov thiab thickness tswj
Normalizing cua sov kho rauv
Phaj leveling, txiav, thiab stamping
Mill engineers piav qhia txog yuav ua li cas cov txheej txheem tsis raug tswj xyuas kom ntseeg tau tias cov khoom siv kho tshuab ruaj khov rau kev siv lub nkoj siab.
Chemical Composition Test Results
Cov qauv coj mus kuaj raws li cov txheej txheem kuaj. Tshuaj muaj pes tsawg leeg tau sim nyob rau hauv lub zeb kuaj.
Table 1: Tshuaj muaj pes tsawg leeg ntawm P275N Steel Phaj (Kev Ntsuas Kub, wt.%)
| Element | C | Si | Mn | P | S | Al |
|---|---|---|---|---|---|---|
| EN 10028-3 Limit | Tsawg dua los yog sib npaug li 0.20 | Tsawg dua lossis 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 |
| Ntsuas tus nqi | 0.15 | 0.31 | 1.27 | 0.020 | 0.007 | 0.041 |
Txhua qhov ntsuas qhov ntsuas tau ua tau raws li tus qauv txwv thiab tau sau tseg hauv daim ntawv qhia txog kev ntsuas zeb.
Mechanical Testing ntawm Mill Laboratory
Cov kev ntsuam xyuas tshuab tau ua tiav ntawm cov khoom kuaj ib txwm npaj los ntawm tib lub tshav kub thiab dov batch.
Table 2: Mechanical Properties ntawm P275N Steel Phaj
| Cov khoom kuaj | Kev xav tau | Qhov tshwm sim tiag |
|---|---|---|
| Yield zog (MPa) | Ntau dua lossis sib npaug li 275 | 308 |
| Tensile zog (MPa) | 410–560 | 448 |
| Elongation (%) | Ntau dua lossis sib npaug 22 | 26 |
| Impact Test | Raws li tau teev tseg | Ua raws |
Cov txiaj ntsig tau qhia tias muaj zog ruaj khov thiab txaus ductility haum rau kev tsim cov hlab ntsha siab.
Ultrasonic Test thiab Dimensional Inspection
Tiav daim hlau underwent 100% ultrasonic kuaj raws li qhov tau teev tseg. Thickness, dav, ntev, thiab flatness raug kuaj xyuas thaum kuaj zaum kawg.
Tsis muaj kev tshaj tawm hauv qhov tsis xws luag tau pom, thiab qhov sib txawv ntawm qhov sib txawv tseem nyob hauv qhov tso cai.
Cov neeg siv khoom xyuas thiab kev lees paub
Cov neeg siv khoom tau tshuaj xyuas cov ntaub ntawv tsim khoom, cov ntaub ntawv kuaj sim, thiab UT cov ntaub ntawv ntawm qhov chaw. Tom qab ua tiav qhov kev tshuaj xyuas, tus neeg siv khoom tau lees paub tias P275N steel daim hlau ua raws li EN 10028-3 thiab kev txiav txim yuav tsum tau ua thiab pom zoo txuas ntxiv ntawm kev tsim khoom thiab xa khoom.
Peb yuav txuas ntxiv ua raws li cov txheej txheem zeb zoo los xyuas kom muaj kev sib raug zoo, sib xws, thiab txhim khu kev qha ntawm cov hlab ntsha steel phaj muab rau peb cov neeg siv khoom.
