Cov txheej txheem tsim khoom ntawm UPE / UPN European tus qauv channel steel ua kom zoo los ntawm kev ua raws li EN cov qauv, cov txheej txheem tsim khoom, thiab kev sim nruj heev -txhua yam ua kom zoo sib xws, kev ua tau zoo, thiab ua raws.
Core Quality Assurance Measures nyob rau hauv ntau lawm
Raw Material Control
High -cov ntaub ntawv purity (hlau ore, seem steel) raug xaiv thiab kuaj cov tshuaj muaj pes tsawg leeg (raws li EN 10025-2) kom tsis txhob muaj impurities ntau dhau (piv txwv li, P Tsawg dua lossis sib npaug li 0.035%, S Tsawg dua lossis sib npaug li 0.035%). Cov neeg muag khoom yuav tsum muab daim ntawv pov thawj ntawm kev tshuaj xyuas, thiab cov mills ua haujlwm hauv -tsev spectroscopic kuaj xyuas cov ntsiab lus xws li carbon (max 0.24%), manganese (1.00–1.60%), thiab silicon (max 0.55%)-tseem ceeb rau lub zog thiab weldability.
Precision Kub RollingCov txheej txheem pib nrog cua sov billets mus rau 1100-1250℃rau ductility, ces hla lawv los ntawm calibrated dov stands. Khoos phis tawj-tswj dov mills kom paub meej qhov tseeb (ib EN 10279), nrog rau lub sijhawm saib xyuas qhov siab, flange dav, thiab lub web thickness ntawm laser gauges. Qhov no tiv thaiv kev sib txawv ntawm qhov kam rau ua (piv txwv li, ± 1.0 mm rau qhov siab tsawg dua lossis sib npaug li 100 mm) thiab ua kom cov ntoo khaub lig zoo sib xws - ntu - tseem ceeb rau kev thauj khoom -cov kabmob sib xws. UPE's parallel flanges thiab UPN's tapered flanges yog zoo li tus ntawm tshwj xeeb tuag kom tau raws li cov qauv tsim.
Tswj cua txiasTom qab dov, cov channel tau txais kev tswj kom txias (cua txias lossis ua kom txias txias rau qis- qib alloy) kom tsis txhob muaj kev ntxhov siab thiab ua kom lub cev tsis sib xws. Kev ua kom txias nrawm yog zam kom tsis txhob muaj cov theem nkig (xws li, martensite), thaum lub caij txias qeeb tiv thaiv cov nplej coarsening -ob qho tib si tseem ceeb rau kev ua tiav 355 MPa yield zog thiab 21% elongation xav tau rau S355JR.