1. Dab tsi yog thawj hom steel rails siv thoob ntiaj teb?
Cov kev sib txuas ntawm cov qauv ntawm cov qauv thoob ntiaj teb: UIC60 (Tebchaws Europe), BS90A (Tebchaws 60,. Hnyav-Haul railways feem ntau siv cov qib siab zoo li R350HT nrog 350HB Hardness, Thaum Urban cov kab ke feem ntau qhia cov npoo sib tw zoo li 49E1. Kev xaiv nyob ntawm qag loads (20-40 tons), nrawm (txog li 350 km / h), thiab ib puag ncig cov xwm txheej. Txhua hom muaj cov ntaub ntawv tshwj xeeb tshaj plaws - piv txwv li, Uic60 muaj 172 hli qhov siab thiab 150 hli pib qhov dav.
2. Npaum li cas yog Rail Steel zoo qhia thaum lub caij tsim khoom?
Kev lees paub zoo yog peb theem tseem ceeb: Ua ntej, Molten Steel undergoes spectral tshuaj (0.0-1.5% manganese). Thib ob, dov cov ntsia tau txais kev ntsuam xyuas ultrasonic kom paub txog kev tawm tsam sab hauv tshaj 2 hli. Thib peb, cov hlua khi ua tiav rau cov khoom siv neeg kho tshuab nrog rau tensile muaj zog (min 880MPA rau R260) thiab Hardness (260-300HB). Cov ntawv pov thawj kev lag luam zeb Cov ntaub ntawv pov thawj sau cov ntaub ntawv tso cai rau txhua qhov tsis muaj nrog cov pa kub rau cov khoom siv hluav taws xob.
3. Tus lej cua sov suam npe hauv kev tsim cov tsheb nqaj hlau?
Tus lej cua sov yog tus cim tshwj xeeb rau txhua tus steel yaj batch, tseem ceeb rau kev taug qab zoo. Nws txuas rau kev ntsuas lob ntaiv qhia cov tshuaj lom neeg thiab cov thermo-cov txheej txheem ua cov tsis sib xws. Thaum cov teb tsis tiav, cov neeg kawm txoj moo zoo tuaj yeem twv rov qab rau cov ntaub ntawv ntau lawm siv tus lej no. Niaj hnub niaj hnub mills laser-cim cov calk cov lej ntawm cov webs Daim ntawv pov thawj cov ntaub ntawv li en 10204 3.1 yuav tsum muaj qhov siv no.
4. Vim li cas kev tsheb ciav hlau siv kev tiv thaiv kev khiav kev sib tsoo?
Kev sib tsoo sib tsoo chaw nyob peb lub zog kev coj ua: 1) CORRUGATION los ntawm kev rov ua lub log tsheb, 2) Rolling hu rau kev qaug zog tawg (3-5mm tob), thiab 3) yas deformation ntawm curves. Kev sib tsoo niaj hnub niaj hnub tshem 0.2-0.5mm ntawm cov hlau txhua 15-30 mgt (lab tag nrho (lab tag nrho (lab tag nrho Qhov no txuas lub neej Rail los ntawm 700 MgT mus rau dhau 1500 MGT. Qhov kev coj ua zoo tshaj plaws cuam tshuam nrog profile sib tsoo txhua 12-18 lub hlis siv khoos phis tawj ntsuas ntsuas.
5. Yuav ua li cas muaj kev ua haujlwm kub ntxhov?
Hlau txuas cov teebmeem tseem ceeb: nthuav tawm cov pob qij txha ua kom haum ntev hloov ntev hloov chaw (1.2mm ib meter ib 10℃kub variation). Hauv qab -20 degree, fracture nyuaj zuj zus yuav kom xav tau ntau dua manganese cov ntsiab lus (1.3%). Hauv cov suab puam, cov av xuab zeb tau ua nrawm nrawm looj kev hnav tus nqi los ntawm 40%. Nqaum ib puag ncig ib puag ncig comprosion-resistant alloys nrog 0.3% tooj liab. Arctic cov neeg mob xav tau cov qhab nia qis tsawg-kub nrog rau Nickel ntxiv.