Thaum nws los txog rau kev tsim cov qauv hlau ruaj khov thiab txhim khu kev qha, kev xaiv cov khoom siv ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab tag nrho kev ua tau zoo, kev nyab xeeb, thiab tus nqi - kev ua tau zoo ntawm ib qhov project.
Ntawm ntau hom qauv steel muaj nyob rau hauv Suav lag luam,Q235thiabQ355yog ob qib uas siv ntau tshaj plaws. Ob leeg yog tsawg- alloy carbon steels uas ua tau raws li cov qauv hauv Suav teb (GB/T 700 thiab GB/T 1591 feem), tab sis lawv txawv heev hauv cov khoom siv, tshuaj lom neeg muaj pes tsawg leeg, thiab daim ntawv thov scenarios.
Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau cov engineers, architects, thiab cov kws tshaj lij kev tsim kho uas xav kom sib npaug zog, weldability, thiab pob nyiaj siv.
Q355 Steel yog dab tsi?
Q355 steel yog siab -lub zog qis- alloy (HSLA) cov qauv hlau txhais raws li Suav tus qauvGB/T 1591-2018(uas hloov tus qauv Q345 qub). Tus "Q" sawv cev rau lub zog tawm los, thiab "355" qhia tias nws qhov tsawg kawg nkaus tawm los lub zog yog355 MPa raurau thicknesses Tsawg dua los yog sib npaug li 16 hli.
Thaum Q235 tso siab rau nws cov ntsiab lus carbon rau lub zog, Q355 ua tiav nws cov khoom siv kho kom zoo dua qub los ntawm cov tshuaj ua kom zoo. Nws yog ib qho qis- carbon hlau (feem ntau C Tsawg dua lossis sib npaug li 0.18%) micro- alloyed nrog cov ntsiab lus xws li manganese, vanadium, niobium, thiab titanium. Qhov no grain refinement ho boosts lub zog, toughness, thiab atmospheric corrosion kuj tsis muaj drastic weldability. Rau qhov xav tau daim ntawv thov xws li hnyav- lub luag haujlwm rail fastening systems thiab kev txhawb nqa tshuab hnyav, Q355 yog tus qauv- ua rau muaj kev ntseeg siab.
Q235 Steel yog dab tsi?
Q235 steel yog ib qho dav dav - lub hom phiaj carbon structural steel nrog lub zog tawm ntawm kwv yees li 235 MPa. Nws yog lub npe hu rau nws cov yas zoo, weldability, thiab formability, ua rau nws haum rau ntau yam kev siv xws li lub teeb muaj vaj tse, ib ntus qauv, scaffolding, thiab tsis yog - tseem ceeb load- bearing Cheebtsam.
Vim nws cov ntsiab lus qis dua thiab cov txheej txheem tsim khoom yooj yim, Q235 yog qhov pheej yig dua thiab siv dav hauv cov haujlwm uas muaj zog heev lossis hnyav ib puag ncig tsis muaj kev txhawj xeeb. Nws yog feem ntau xaiv rau kev tsim kho lub hauv paus, cov chaw ua liaj ua teb, thiab cov chaw cia khoom yooj yim.
Q235 vs Q355 Steel: 5 Qhov Tseem Ceeb Qhov txawv
Ntau tus engineers ntsib qhov teeb meem classic: "Kuv puas tuaj yeem siv Q235 rau hnyav- thauj cov ntses, lossis kuv yuav tsum tau hloov mus rau Q355 steel?" Cov lus teb yog nyob rau hauv cov ntaub ntawv. Nov yog tsib qhov sib txawv ntawm ob yam khoom no.
1. Mechanical Properties thiab Yield Strength
Qhov sib txawv yooj yim tshaj plaws yog lub zog. Nrog rau qhov tsawg kawg nkaus lub zog ntawm 355 MPa (tsawg dua lossis sib npaug li 16 hli), Q355 muab kwv yees li51% siab zogtshaj Q235 (235 MPa). Rau kev tsheb ciav hlau clamps ntawm cov kab thauj khoom lossis thauj khoom -cov kab ke ntawm cov qauv, qhov no txhais tau tias Q355 tuaj yeem tiv taus qhov kev ntxhov siab ntau dua li qub thiab tsis muaj zog yam tsis muaj deformation.
2. Tshuaj lom neeg muaj pes tsawg leeg thiab Alloy tsim
Q235 yog cov pa roj carbon monoxide uas tsis tas yuav tsum muaj cov ntsiab lus alloying, ua kom yooj yim thiab pheej yig. Hauv qhov sib piv, Q355 yog HSLA steel. Nws cov ntsiab lus carbon yog capped qis (C Tsawg dua los yog sib npaug li 0.18%), thiab nws leverages ntxiv dag zog xws li Mn (txog 1.70%) thiab nplej- refining ntsiab xws li V, Nb, thiab Ti. Tsis tas li ntawd, Q355 muaj kev tswj hwm tsis zoo (S Tsawg dua lossis sib npaug ntawm 0.020% vs. Q235's S Less dua lossis sib npaug rau 0.040%), ua rau muaj kev huv huv, ntau hom steel qauv.
3. Tsawg-Tsuas Muaj Teeb Meem Toughness
Qhov no yog qhov txiav txim siab rau sab nraum zoov lossis sub-zero daim ntawv thov. Standard Q235B feem ntau haum rau chav - qhov kev pabcuam kub. Thaum Q235D tuaj yeem ua tiav lub zog ntawm 27 J ntawm -20 degree,Q355E qib steel excels nrog lav qhov cuam tshuam lub zog Ntau dua lossis sib npaug rau 27 J ntawm -40 degree. Qhov zoo tshaj no - qhov kub thiab txias toughness tiv thaiv nkig tawg nyob rau hauv rail accessories raug rau lub caij ntuj no hnyav, mining ib puag ncig, los yog txias cia chaw.
4. Corrosion Resistance thiab Service Life
Q235 xav tau cov txheej tiv thaiv zoo li kub-dip galvanizing kom ua tiav lub neej kev pab cuam ntawm kwv yees li 15 xyoo nyob rau hauv qhov chaw sab nraum zoov. Q355, vim nws cov ntsiab lus alloyed (uas txhawb nqa lub patina denser thiab siab dua electrochemical stability), muaj qhov zoo ntawm cov xeb tsis kam. Thaum ua ke nrog cov qauv kev tiv thaiv, Q355 Cheebtsam tuaj yeem ua tiav ib qhokev pab cuam lub neej tshaj 30 xyoo, txo qis ntev - lub sij hawm tu thiab hloov cov nqi rau qhib - huab cua railways los yog ntug hiav txwv infrastructure.
5. Cov txheej txheem ua haujlwm thiab vuam
Q235 yog qhov zam heev, muab cov vuam yooj yim nrog tus qauv J422 electrodes thiab tsis tas yuav tsum tau ua kom sov. Q355 lub zog siab dua yuav tsum tau ceev faj ntau dua. Txhawm rau kom tsis txhob muaj hydrogen- ua kom tawg, cov vuam yuav tsum sivqis-hydrogen electrodes (zoo li J507)thiab siv preheating kom zoo rau cov seem tuab. Thaum nws xav tau kev tswj xyuas nruj dua, qhov hnyav -txuag muaj peev xwm feem ntau offsets me ntsis kev koom tes fabrication.
Hu rau GNEE Steel hnub no.Peb cov kws tshaj lij yuav tshuaj xyuas koj cov xwm txheej thauj khoom, ib puag ncig, thiab pob nyiaj siv kom ntseeg tau tias koj tau txais cov qib steel tiag tiag uas koj xav tau - kev ua haujlwm siab tshaj plaws yam tsis tau them rau qhov tsis tsim nyog tshaj - specification. Thov ib daim ntawv tsocai rau koj qhov project tom ntej thiab paub txog kev ntseeg siab uas los nrog kev xaiv cov khoom zoo.
Suav steel qib Q355 yog dab tsi?
Q355 steel yogSuav cov qauv steel qib uas yog ib feem ntawm GB / T 1591 tus qauv. Nws yog siab -lub zog qis- alloy steel paub txog nws cov khoom siv kho tshuab zoo, ua rau nws tsim nyog rau ntau yam kev siv hauv kev tsim kho thiab engineering.
Qhov txawv ntawm S355 thiab Q355 yog dab tsi?
Q355 thiab S355 tsis yog cov qauv zoo ib yam, tab sis lawv ua haujlwm sib npaug rau feem ntau cov qauv siv. Ob leeg muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa thiab zoo sib xws tensile zog ntau yam. Qhov sib txawv tseem ceeb yog nyob rau hauv cov qauv specifications, tshuaj lom neeg muaj pes tsawg leeg txwv, thiab kev xa khoom
Q235 steel qib yog dab tsi?
Q235 Steel: Hom hlau no tseem hu ua "qis -carbon"los yog "zoo" qib steel thiab nws yog feem ntau siv rau cov hom phiaj, xws li I- kab teeb los yog cov tshooj channel, qhov twg yuav tsum muaj zog thiab ductility tab sis weldability tsis tsim nyog.
Q235 steel qib sib npaug li cas?
Q235 steel yog tus qauv qib hauv Suav teb, nrog cov khoom sib npaug hauv lwm cov qauv thoob ntiaj teb xws liASTM A36 (Tebchaws Asmeskas) thiab S235JR (Tebchaws Europe).
Dab tsi yog qhov txawv ntawm 45 steel thiab Q235 steel?
Paub txog nws tus nqi qis thiab zoo plasticity, Q235 yog dav siv hauv kev tsim kho thiab teeb pom kev lag luam. Hauv qhov sib piv, 45 steel yog nyiam rau nws lub zog siab thiab hnav tsis kam thiab feem ntau yog siv rau hauv kev tsim cov khoom tseem ceeb xws li cov ncej thiab lub zog.
Qhov txawv ntawm SS400 thiab Q235 yog dab tsi?
Q235's yield point yog ntau dua 235 MPa, thaum lub SS400 tawm los point yog 245MPa. SS400 (STEEL rau General Structure) txhais tau hais tias cov qauv hlau dav dav nrog lub zog tensile ntau dua 400MPa. Q235 txhais tau tias cov pa roj carbon zoo tib yam steel ntau dua
