Dab tsi yog tshuaj lom neeg muaj pes tsawg leeg ntawm Q345 hlau?
Cov tshuaj lom neeg muaj kuab lom ntawm Q345 Steel nruj me ntsis ua raws li tus qauv hauv tebchaws GB / t 1591 {{{{{} ecloy {zog cov hlau hluav taws xob hlau. " Nws cov cwj pwm tseem ceeb yog qhov ntxiv ntawm cov ntsiab lus yooj yim xws li manganese (mn) thiab silicon (si) los txhim kho lub zog. Qee qib kawm sib txuas cov ntsiab lus Microalloying xws li Vanadium (V), thiab niobium (NB) kom rov txhim kho cov noob nplej (txuas ntxiv txhim kho kev nruj thiab lub zog). Cov ntsiab lus ntawm cov kev phom sij xws li carbon (c), phosphorus (p), thiab leej faj (cov leeg mos tswj kom tsis txhob txo qis lossis ua rau weld tawg.
Cov tshuaj lom neeg muaj pes tsawg leeg tsis yog tsau; Hloov chaw, nws tau muab faib ua cov nyom raws cov qib zoo (A / B / C / E) thiab tuab tuab yuav tsum muaj stricter sab saud txwv rau qee cov ntsiab lus). Cov hauv qab no yog tus qauv ntawm cov ntsiab lus tseem ceeb tshaj plaws (%), rau cov kev txwv ntawm cov khoom siv xws li C thiab MN me ntsis qis dua; thov saib cov qauv rau cov ntsiab lus)
Cov ntawv tseem ceeb
Lub ntsiab lus ntawm "Xaiv cov ntsiab lus ntxiv": V, ti, thiab NB tsis tsim nyog yuav tsum tau ua ntawm Q345. Cov hlau mills tuaj yeem xaiv ntxiv rau lawv raws li cov txheej txheem ntau lawm (xws li nruam casting thiab dov) thiab kev ua tau zoo. Piv txwv li, v lossis ti yuav muab ntxiv rau kev txhim kho weldability lossis tsawg - kub sab; Ib qho me me ntawm NB yuav tau ntxiv rau kev sib npaug huab cua tsis kam.
Thickness cuam tshuam: rau cov hlau thicknesses loj dua 60mm, kom tsis txhob muaj qhov chaw txwv (tsis pub tshaj) Tsis tas li ntawd, cov kev tswj hwm sab nraud yog muab tso rau P thiab S. Rau cov lus qhia hloov kho lub rooj rau cov hlau ntawm cov thickness sib txawv "hauv GB / T 1591-2018.
Qhov sib txawv los ntawm Q235: Q235: steel hlau) muaj tsis muaj V, Ti, lossis NB, thiab muaj lub zog qis dua Q345. Q345, ntawm qhov tod tes, ua tiav qhov sib npaug ntawm lub zog siab thiab kev nruj me ntsis los ntawm cov kev cuam tshuam ntawm MN thiab Microalloying ntsiab.
Rau qhov ua kom meej cov tshuaj sib xyaw ntau dua (piv txwv li, q345d phaj los ntawm cov ntawv pov thawj steel), xa cov ntawv teev cov khoom siv uas), yuav tsum yog nyob rau hauv cov qauv theem).