Basic Properties thiab Specifications ntawm S235JR Lub kaum sab xis Steel
Nqe Lus Nug: S235JR lub kaum sab xis steel yog dab tsi, thiab lub npe "S235JR" txhais li cas?
Teb: S235JR lub kaum sab xis steel yog kub- dov cov qauv hlau nrog L-zoo li tus ntoo khaub lig- ntu, dav siv hauv kev tsim kho thiab engineering. Lub npe "S235JR" muab cov ntaub ntawv tseem ceeb txog nws cov khoom: "S" sawv cev rau cov qauv hlau, "235" qhia qhov tsawg kawg nkaus tawm los ntawm 235 MPa, "J" qhia tias nws ua tau raws li qhov yuav tsum tau ua ntawm 20 degree, thiab "R" qhia txog cov txheej txheem dov siv hauv nws cov khoom. Qhov kev sib xyaw ua ke ntawm cov khoom no ua rau nws muaj ntau yam khoom siv, tsim nyog rau kev thauj khoom -cov ntaub ntawv kabmob uas yuav tsum muaj lub zog nruab nrab thiab zoo weldability. Nws yog tus qauv raws li EN 10025-2, kom ntseeg tau tias zoo ib yam thoob plaws cov tuam txhab.
Lus Nug: Dab tsi yog qhov ntev (qhov loj me) ntawm S235JR lub kaum sab xis steel muaj nyob hauv khw?
Teb: S235JR lub kaum sab xis steel muaj nyob rau hauv ntau qhov ntev kom haum rau ntau yam kev siv. Cov ceg ntev ntev (ob sab ntawm L-puab) feem ntau pib ntawm 20mm x 20mm thiab mus txog 200mm x 200mm lossis loj dua, nyob ntawm cov chaw tsim khoom thiab cov qauv hauv cheeb tsam. Lub thickness ntawm ob txhais ceg feem ntau yog li ntawm 3 hli mus rau 25 hli, nrog rau cov ceg ntev ntev feem ntau ua ke nrog cov seem tuab kom muaj kev ncaj ncees. Qhov ntev feem ntau yog tus qauv, nrog rau kev xaiv ntau yog 6 meters, 9 meters, lossis 12 meters, txawm tias qhov ntev ntev tuaj yeem raug txiav txim rau qee qhov haujlwm. Cov qhov ntev no tso cai rau cov engineers xaiv qhov tsim nyog raws li qhov xav tau ntawm kev thauj khoom thiab tsim kev txwv ntawm lawv cov haujlwm
Nqe Lus Nug: Lub zog tensile ntau ntawm S235JR lub kaum sab xis steel yog dab tsi, thiab nws piv rau lwm cov qauv steel li cas?
Teb: Lub zog tensile ntawm S235JR lub kaum sab xis steel feem ntau yog li ntawm 360 MPa txog 510 MPa, uas yog cov yam ntxwv ntawm cov qauv hlau me me. Qhov no tso rau hauv qis rau nruab nrab lub zog qeb piv rau qib siab dua -qib steels xws li S275JR (tensile zog 370-530 MPa) lossis S355JR (470-630 MPa). Nws lub zog tensile nruab nrab ua rau nws zoo tagnrho rau cov ntawv thov uas muaj peev xwm thauj khoom hnyav tsis yog qhov yuav tsum tau ua, xws li hauv kev tsim kho, lub hauv paus, lossis kev txhawb nqa. Txawm hais tias nws yuav tsis phim lub zog ntawm cov qib siab dua, S235JR muaj qhov sib npaug zoo ntawm lub zog, ductility, thiab tus nqi-zoo, ua rau nws yog qhov kev xaiv nrov rau ntau yam kev ua haujlwm.
Nqe Lus Nug: Puas yog S235JR lub kaum sab xis steel weldable, thiab cov txheej txheem vuam dab tsi feem ntau siv rau nws?
Teb: Yog, S235JR lub kaum sab xis steel yog qhov zoo tshaj plaws weldable, uas yog ib qho ntawm nws cov txiaj ntsig tseem ceeb hauv kev siv cov qauv. Nws tuaj yeem ua tau yooj yim welded siv feem ntau cov txheej txheem vuam, suav nrog cov hlau thaiv hlau arc vuam (SMAW, lossis welding), roj hlau arc vuam (GMAW, lossis MIG vuam), thiab flux-cored arc vuam (FCAW). Cov ntsiab lus tsis tshua muaj carbon nyob rau hauv S235JR (feem ntau nyob ib ncig ntawm 0.20% siab tshaj) txo qhov kev pheej hmoo ntawm vuam tawg, thiab nws cov ductility zoo ua kom cov pob qij txha tuaj yeem tiv taus kev ntxhov siab me ntsis yam tsis ua haujlwm. Ua ntej-weld npaj, xws li ntxuav qhov chaw ntawm xeb los yog cov kab mob, yog pom zoo kom muaj zog, txhim khu kev qha welds. Tom qab-weld heat treatment feem ntau tsis tsim nyog rau S235JR, ua kom yooj yim rau txoj kev vuam hauv ntau zaus.
Lus Nug: Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm S235JR lub kaum sab xis steel, thiab nws cuam tshuam nws cov khoom li cas?
Teb: Cov tshuaj muaj pes tsawg leeg ntawm S235JR lub kaum sab xis steel yog nruj tswj xyuas kom ntseeg tau tias kev ua haujlwm zoo ib yam. Nws feem ntau muaj hlau (Fe) ua lub hauv paus hlau, nrog carbon (C) cov ntsiab lus mus txog 0.20%, manganese (Mn) mus txog 1.40%, silicon (Si) mus txog 0.55%, thiab me me ntawm phosphorus (P) thiab sulfur (S), txhua txwv rau 0.045% kom tsis txhob brittleness. Cov ntsiab lus no ua haujlwm ua ke los txheeb xyuas nws cov khoom: carbon pab txhawb lub zog tab sis khaws cia qis kom tswj tau qhov weldability; manganese txhim khu lub zog tensile thiab ductility; silicon ua raws li deoxidizer thaum lub sijhawm tsim khoom, txhim kho kev huv. Cov qib qis ntawm phosphorus thiab sulfur tiv thaiv embrittlement, ua kom cov hlau tseem nyob txawm tias muaj kev ntxhov siab. Qhov kev sib xyaw no ua rau S235JR ob leeg muaj zog txaus rau kev siv cov qauv thiab yooj yim rau kev ua haujlwm nrog hauv fabrication.
