Q420qD yog dab tsi
Q420qD yog ib hom ntawm lub zog siab uas tsis tshua muaj alloy cov qauv hlau siv hauv kev tsim choj, nws cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab ua tau raws li qhov yuav tsum tau ua ntawm GB / T 1591-2018 tus qauv thiab JB / T 4730-2005 tus qauv. Q420qD steel muaj cov yam ntxwv ntawm lub zog siab, zoo toughness thiab weldability, thiab lwm yam.
Tsis muaj
Q420qD yog cov hlau tsis tshua muaj hlau, nws cov kev txwv yog raws li hauv qab no:
1. Tshuaj muaj pes tsawg leeg:
Cov pa roj carbon (C): 0.18 feem pua
Silicon (Si): 0.60 feem pua
Manganese (Mn): 1.50 feem pua
Phosphorus (P): 0.025 feem pua
Sulfur (S): 0.015 feem pua
Chromium (Cr): 0.20 feem pua
Nickel (Ni): 0.70 feem pua
Copper (Cu): 0.30 feem pua
Molybdenum (Mo): 0.10 feem pua
2. Mechanical zog:
Yield zog: Ntau dua los yog sib npaug rau 420 MPa
Tensile zog: 500-680 MPa
Elongation: Ntau dua lossis sib npaug li 18 feem pua
Tshooj shrinkage: Ntau dua lossis sib npaug li 45 feem pua
Yam ntxwv
Q420qD yog lub zog muaj zog qis-alloy steel rau kev tsim kho choj, nws cov yam ntxwv tseem ceeb suav nrog cov hauv qab no:
1. Lub zog siab: Q420qD tensile lub zog thiab lub zog tawm los yog siab, tuaj yeem tiv taus ntau qhov kev thauj khoom thiab deformation los xyuas kom muaj kev ruaj ntseg thiab ruaj khov ntawm tus choj.
2. Zoo toughness: Q420qD steel muaj zoo toughness nyob rau tib lub sij hawm siab zog, nws muaj peev xwm ua kom ruaj khov thaum muaj kev cuam tshuam thiab kev co, thiab nws tsis yooj yim rau tawg.
3. Weldability: Q420qD steel muaj qhov zoo weldability thiab tuaj yeem ua tiav thiab tsim tau siv ntau txoj kev vuam.
4. Zoo corrosion kuj: Q420qD steel tau tshwj xeeb kho kom muaj corrosion kuj zoo thiab tuaj yeem siv rau hauv qhov chaw hnyav.
Scope ntawm daim ntawv thov
Q420qD yog tsim rau ntau yam kev tsim kho choj, suav nrog cov hauv qab no:
1. Cov choj loj: Q420qD steel tuaj yeem siv rau kev tsim cov choj kev loj, xws li txuas txuas txuas txuas, txuas txuas txuas txuas txuas, arch txuas hniav, steel truss txuas hniav thiab lwm yam khoom siv.
2. Railroad txuas hniav: Q420qD steel tuaj yeem siv rau kev tsim cov tsheb ciav hlau, xws li steel truss choj, steel truss choj, steel box txuas hniav thiab lwm yam khoom.
3. Lwm qhov chaw: Q420qD steel kuj tuaj yeem siv rau hauv kev tsim cov tsev siab, cov tshuab loj thiab cov khoom siv thiab lwm yam khoom siv uas yuav tsum tau muaj zog thiab zoo toughness.
Siv Teeb meem
1. Welding teeb meem: Q420qD steel muaj siab hardness thiab lub zog, yog li thaum vuam yuav tsum tau them sai sai rau kev xaiv ntawm vuam txoj kev tsim nyog thiab cov txheej txheem tsis txhob tawg, deformation thiab lwm yam teeb meem.
2. Cov teeb meem ua haujlwm: Q420qD steel muaj qhov nyuaj siab, yog li nws yuav tsum tau siv cov cuab yeej tsim nyog thiab cov txheej txheem tsis ua haujlwm hauv cov txheej txheem ntawm kev txiav thiab drilling kom ntseeg tau tias kev ua haujlwm zoo thiab raug ntawm cov khoom ua haujlwm.
3. Anti-corrosion teeb meem: Q420qD steel nyob rau hauv cov txheej txheem ntawm kev siv yuav tsum tau them sai sai rau kev tiv thaiv corrosion, yuav siv tau xws li painting, galvanizing, nyob rau hauv thiaj li yuav mus cuag nws cov kev pab cuam lub neej.
4. Cov teeb meem zoo: Q420qD steel yuav tsum tau kuaj xyuas kom zoo ua ntej siv los xyuas kom meej tias nws ua tau raws li cov kev cai ntawm lub teb chaws cov qauv thiab cov ntawv cog lus kom ntseeg tau tias nws muaj kev nyab xeeb thiab siv tau.
Cim npe nrov: q420qd siab zog tsawg alloy steel, Tuam Tshoj q420qd siab zog tsawg alloy steel lwm tus neeg
