Q620EthiabQ690E yog ob yam khoom tseem ceeb nyob rau hauv 600MPa - qib siab -lub zog qis- alloy structural steel system, ob qho tib si nrog qib "E" uas lav qhov cuam tshuam zoo ntawm -40℃. Qhov sib txawv ntawm 70MPa nyob rau hauv lub zog tawm los tsis yog ib qho yooj yim cov lej sib txawv, tab sis ib qho kev xav ntawm kev sib txawv kev tsim logics, engineering daim ntawv thov qhov tseem ceeb thiab kev ua lag luam. Qhov kev tshuaj ntsuam no rhuav tshem lawv qhov sib txawv tseem ceeb ntawm qhov kev xav ntawmmaterial design philosophy, industrial application scenarios, thiab kev txhim kho yav tom ntej, muab kev xa mus rau - nrhiav kev siv rau kev xaiv cov khoom siv engineering.
Material Design Philosophy: Balanced Strength -Toughness vs Ultra-High Strength Priority
Qhov sib txawv tseem ceeb ntawm Q620E thiab Q690E yog nyob rau hauv lawv cov qauv pib cov ntsiab lus, uas ncaj qha txiav txim siab txog kev sib koom ua ke ntawm cov ntsiab lus alloy thiab kev ua kom zoo ntawm cov txheej txheem ntau lawm.
Q620E: Tus Nqi -Tus Neeg Ua Haujlwm Ua Tau Zoo tsom rau kev ua tau zoo sib npaug
Q620E yog tsim los sib npaug zog, toughness, processability thiab nqi. Nws cov tshuaj muaj pes tsawg leeg siv txoj hauv kev "tsawg-carbon + micro-alloying", feem ntau yog tso siab rau niobium (Nb), vanadium (V) thiab titanium (Ti) rau cov nplej ua kom zoo thiab nag lossis daus. Nws tsis ntxiv ntau ntawm cov khoom siv kim kim xws li molybdenum (Mo) thiab npib tsib xee (Ni), uas tswj cov nqi tsim khoom zoo. Cov pa roj carbon sib npaug (Ceq) nruj me ntsis txwv qis dua 0.48%, kom ntseeg tau tias vuam zoo heev. Txawm tias cov phaj tuab (Ntau dua lossis sib npaug li 50 hli), nws tuaj yeem welded nrog yooj yim preheating, thiab lub zog sib koom ua ke tuaj yeem ncav cuag ntau dua 90% ntawm lub hauv paus hlau. Nyob rau hauv cov nqe lus ntawm microstructure, Q620E tsim ib tug uniform ferrite-pearlite-bainite multiphase qauv los ntawm cov txheej txheem TMCP, uas ua tau zoo sib npaug ntawm cov khoom muaj zog (Ntau tshaj los yog sib npaug rau 620MPa) thiab elongation (Ntau dua los yog sib npaug rau 14%).
Q690E: Lub Siab -Performance Specialist Chasing Ultra-High Strength
Q690E tus qauv tsim yog ua kom tawg los ntawm 690MPa yield zog pib thaum tuav tswj qhov kub zoo heev - kub toughness. Txhawm rau ua tiav lub hom phiaj no, nws cov tshuaj muaj pes tsawg leeg yog qhov nyuaj dua: raws li micro-alloying ntsiab xws li Nb thiab V, nws ntxiv cov nyiaj tsim nyog ntawm molybdenum (tsawg dua lossis sib npaug li 0.30%) thiab boron (tsawg dua lossis sib npaug li 0.004%) txhawm rau txhim kho hardenability, thiab tswj cov phosphorus thiab cov ntsiab lus qis dua 0.5% L. Tsawg dua lossis sib npaug li 0.015%) txhawm rau tshem tawm cov ntsiab lus pib microcrack. Cov txheej txheem tsim khoom yuav tsum tau txais kev kho quenching thiab tempering (Q&T) kev kho: quenching ntawm 880-920℃kom tau martensite, thiab tempering ntawm 580-650℃los hloov mus rau tempered martensite-bainite duplex qauv. Cov qauv no ua kom ntseeg tau tias lub zog tawm los nce siab dua lossis sib npaug rau 690MPa, thiab qhov cuam tshuam lub zog ntawm -40℃tseem zoo dua los yog sib npaug rau 47J, daws qhov kev tsis sib haum xeeb ntawm lub zog siab thiab tsis tshua muaj zog.
Daim Ntawv Thov Kev Lag Luam: General Heavy-Lub Luag Haujlwm vs Extreme Load-Bearing
Qhov sib txawv ntawm kev ua tau zoo txiav txim siab tias Q620E thiab Q690E tau siv rau hauv cov xwm txheej sib txawv kiag li, thiab lawv ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv lawv cov haujlwm.
Q620E: Lub Caj Npab Ntawm General High-Strength Engineering
Q620E tau siv dav hauv cov haujlwm uas xav tau lub zog siab tab sis tsis xav tau qhov hnyav hnyav, tso siab rau nws cov nqi siab ua haujlwm.
- Infrastructure teb: Nws yog siv rau cov truss Cheebtsam ntawm ntev - ncua txoj kev loj choj thiab cov steel qauv thav duab ntawm 200-300m super high -nce vaj tse. Piv txwv li, nyob rau hauv ib tug tej yam nroog viaduct project, Q620E hloov cov tsoos Q355 steel, txo cov steel noj ib kilometer los ntawm 12% thaum ua tau raws li cov seismic thiab cua kuj yuav tsum tau.
- Engineering machinery teb: Nws yog siv rau lub chassis ntawm nruab nrab -tonnage excavators thiab boom ntawm 300-500 tuj cranes. Nws cov txheej txheem ua tau zoo ua rau nws yooj yim rau kev tsim cov khoom sib txuas, thiab tus nqi yog 20% qis dua li ntawm Q690E.
- Lub zog teb: Nws yog siv rau lub cev tseem ceeb ntawm cov av cua zog yees thiab qis - cov kav dej siab ntawm cov roj thiab cov kav dej. Nrog los tiv thaiv - txheej txheej corrosion, nws lub neej kev pabcuam tuaj yeem ncav cuag 30 xyoo, ua tau raws li qhov yuav tsum tau ua ntawm cov khoom siv hluav taws xob dav dav.
Q690E: Cov khoom siv tseem ceeb ntawm kev ua haujlwm siab heev
Q690E yog tsom rau siab- cov cuab yeej siv kawg thiab cov haujlwm tseem ceeb uas yuav tsum tau tiv taus ultra- siab loads thiab hnyav ib puag ncig, thiab nws cov xwm txheej thov tshwj xeeb thiab siab dua - tus nqi.
- Hydropower engineering: Nws yog cov khoom siv rau cov kav dej siab ntawm cov chaw nres tsheb loj xws li Baihetan. Siv Q690E txo cov yeeb nkab phab ntsa thickness ntawm 60mm mus rau 42mm, txuag 12,000 tons ntawm hlau rau ib qhov project, thiab txhim kho cov dej ntws efficiency los ntawm 8%.
- Deep{0}}sea engineering: Nws yog siv rau lub tsho qauv ntawm sib sib zog nqus- hiav txwv drilling platforms thiab lub siab hull ntawm submersibles. Nws tuaj yeem tiv taus qhov ultra-siab siab ntawm 3,000m hauv qab dej thiab qhov kub qis ntawm -40℃hauv hiav txwv polar, tsis muaj pob txha tawg.
- Heavy machinery teb: Nws yog siv rau lub boom ntawm 1,000-tuj tag nrho- struts cranes thiab hydraulic txhawb txhua kab ntawm ultra-thick thee seams. Nws lub zog ultra-siab ua rau cov cuab yeej ua tiav 15-20% qhov hnyav txo thaum txhim kho qhov siab tshaj plaws nqa tau los ntawm 50%.
- High - chaw tsheb ciav hlau ceev: Nws yog siv rau bogie ncej ntawm siab - tsheb ciav hlau ceev. Nws txoj kev qaug zog zoo heev tuaj yeem tiv taus 10 lab lub sijhawm ntawm kev thauj khoom cyclic, uas yog ob zaug ntawm Q620E.
Kev ua thiab kev tsim kho: Yooj yim thiab ua tau zoo vs Precision-Tau
Qhov sib txawv ntawm cov khoom siv ua rau muaj qhov tsis zoo hauv kev ua haujlwm nyuaj thiab kev tsim kho, uas cuam tshuam ncaj qha rau lub voj voog thiab tus nqi.
Q620E: Kev ua haujlwm yooj yim, kev tsim kho qis
Q620E tuaj yeem tsim los ntawm TMCP lossis Q&T txheej txheem, thiab cov txheej txheem ntau lawm yog qhov paub tab. Feem ntau qhov nruab nrab - steel mills tuaj yeem ua tiav cov khoom lag luam ruaj khov. Hais txog ntawm - qhov chaw tsim kho:
- Vuam: Qhov ntsuas kub ua ntej tsuas yog 100-150℃rau cov phaj tuab, thiab cov khoom siv hluav taws xob zoo tib yam shielded vuam (xws li ER50-6) tuaj yeem siv, yam tsis tas yuav tsum muaj kev kho cua sov tom qab vuam rau cov khoom siv dav dav.
- Txiav thiab sib sau: Nplaim txiav yog siv tau rau daim hlau ntawm tag nrho cov thicknesses, thiab txias dabtsi yog khoov tuaj yeem nqa ncaj qha rau cov phaj Tsawg dua lossis sib npaug li 30 hli yam tsis muaj preheating, uas ua rau lub sijhawm siv sijhawm luv.
Q690E:
- Precision processing, kev tsim kho siabQ690E lub zog siab ua rau muaj kev nyuaj siab dua, thiab kev tswj cov txheej txheem nruj yuav tsum muaj nyob hauv txhua qhov txuas:
- Vuam: Tsawg- cov khoom siv hydrogen vuam yuav tsum tau siv kom tsis txhob muaj cov kab mob khaub thuas. Lub preheating kub rau daim hlau loj dua los yog sib npaug rau 20 hli yuav tsum tau nce mus rau 150-200 degree, thiab cov cua sov input yuav tsum tau tswj ntawm 15-25kJ / cm2 los tiv thaiv softening ntawm tshav kub- cuam tshuam cheeb tsam. Tom qab-weld hydrogen tshem tawm kev kho cua sov yog qhov yuav tsum tau ua rau cov khoom tseem ceeb.
- Txiav thiab sib sau: Plasma lossis laser txiav raug pom zoo kom txo cov cua sov- thaj tsam cuam tshuam. Txias dabtsi yog khoov yuav tsum muaj ib tug loj dabtsi yog khoov vojvoog (Ntau tshaj los yog sib npaug zos rau 6 lub sij hawm lub phaj thickness) kom tsis txhob tawg, thiab kub dabtsi yog khoov yog yuav tsum tau rau complex tshwj xeeb - zoo li tus Cheebtsam.
- Kev soj ntsuam zoo: 100% ultrasonic flaw detection yog yuav tsum tau rau cov khoom tiav, thiab batch sampling rau -40℃cuam tshuam kev ntsuam xyuas yog tsim nyog los xyuas kom meej kev ua tau zoo stability.
Kev Ua Lag Luam Zoo Tshaj Plaws thiab Kev Txhim Kho Kev Lag Luam: Scale Popularization vs High-End Upgrade
Tsav los ntawm lub teb chaws "dual carbon" lub tswv yim thiab kev kho dua tshiab ntawm cov cuab yeej tsim kev lag luam, Q620E thiab Q690E qhia txog kev txhim kho sib txawv kiag li.
- Q620E: Mus rau Loj - Daim ntawv thov teev thiab txo nqiQ620E yuav nthuav dav nws daim ntawv thov dav dav dav dav - lub zog muaj zog. Lub hom phiaj ntawm kev txhim kho yav tom ntej yog txhawm rau txhim kho cov txheej txheem TMCP, txo qhov sib ntxiv ntawm cov ntsiab lus alloy, thiab txo tus nqi ntau lawm. Nws cia siab tias los ntawm 2030, nws txoj kev lag luam feem ntau nyob rau hauv siab - lub zog steel teb yuav ntau dua 30%, ua cov khoom siv tseem ceeb rau kev tsim kho hauv nroog thiab nruab nrab - loj engineering machinery.
- Q690E: Mus rau Siab -Txoj kev kho kom haum thiab kev ua tau zooQ690E yuav tsom mus rau kev tshawb fawb thiab kev txhim kho cov qib tshwj xeeb kom tau raws li qhov xav tau ntawm qhov chaw huab cua. Piv txwv li, txhim kho corrosion- qib resistant rau offshore cua zog tej yaam num, ntxiv tooj liab thiab chromium ntsiab los txhim kho corrosion kuj nyob rau hauv ntsev tsuag ib puag ncig; tsim kom muaj ultra- qib kub qis rau kev tsim hluav taws xob polar, uas tuaj yeem tswj tau qhov hnyav ntawm -60℃. Nrog rau txoj kev loj hlob ntawm kev sib sib zog nqus-sea resource exploitation thiab loj-scale hydropower tej yaam num, qhov kev thov rau Q690E yuav loj hlob ntawm ib xyoos twg ntawm 15-20%.
Nyob rau hauv kev tsim kho ntawm lub zog yees, qhov twg yog qhov tsim nyog ntawm Q620E thiab Q690E?
Rau av cua zog yees nrog qhov siab tsawg dua lossis sib npaug li 150m, Q620E yog tus nqi ntau dua - zoo. Nws tuaj yeem ua tau raws li qhov kev thauj khoom -cov kabmob uas yuav tsum tau ua thiab txo tus nqi yuav khoom los ntawm 20%. Rau offshore cua fais fab yees lossis av yees nrog qhov siab siab dua lossis sib npaug li 180m, Q690E yog qhov nyiam. Nws lub ultra{10}}lub zog siab tuaj yeem txo cov phab ntsa ntauwd los ntawm 10-15%, txo qhov nyuaj ntawm kev thauj mus los ntawm ntug hiav txwv thiab kev teeb tsa, thiab txhim kho cov cua tiv thaiv ntawm ntauwd.
Yuav ua li cas cov kev hloov kho yuav tsum tau thaum hloov Q620E nrog Q690E nyob rau hauv lub transformation ntawm thee mine hydraulic txhawb?
Ua ntej,welding txheej txheem kho: Hloov cov khoom siv vuam zoo tib yam nrog qis -hydrogen siab- lub zog vuam hlau, nce qhov kub ntawm qhov kub mus rau 150-200℃, thiab tswj cov cua kub tawm hauv 15-25kJ / cm. Thib ob,tsim cov txheej txheem optimization: Ua kom cov kab mob khaub thuas khoov kom ntau dua lossis sib npaug li 6 npaug ntawm cov phaj tuab, thiab tsis txhob khoov nrawm kom tsis txhob tawg. Peb,post-kev kho cua sov: nqa tawm kev kho hydrogen tshem tawm ntawm 550-600℃tom qab vuam kom tshem tawm cov kev ntxhov siab seem.
Vim li cas Q690E kim dua Q620E, thiab dab tsi cuam tshuam rau tus nqi sib txawv?
Tus nqi sib txawv feem ntau yog los ntawm peb yam: thawj,tus nqi raw khoom: Q690E ntxiv cov khoom siv kim kim xws li molybdenum thiab boron, thiab muaj kev tswj hwm nruj dua cov ntsiab lus tsis huv, uas ua rau cov khoom siv raw khoom nce 15-20%. Thib ob,tus nqi tsim khoom: Q690E yuav tsum tau mus los ntawm quenching thiab tempering kev kho mob, uas siv ntau zog thiab nce tus txheej txheem nqi los ntawm 10-15%. Peb,Cov nqi kuaj xyuas zoo: Q690E yuav tsum tau 100% ultrasonic flaw detection thiab batch cuam tshuam kev ntsuam xyuas, uas tsub kom tus nqi tshuaj xyuas los ntawm 5-10%. Zuag qhia tag nrho, tus nqi lag luam ntawm Q690E yog 20-30% siab dua li ntawm Q620E.
Q620E puas tuaj yeem siv los hloov Q690E hauv cov haujlwm xwm txheej kub ntxhov?
Hloov pauv yogtsis pom zoofeem ntau. Q620E lub zog tawm los yog 70MPa qis dua Q690E, uas tsis tuaj yeem ua tau raws li qhov kev thauj khoom -cov kev cai ntawm cov khoom tseem ceeb. Nyob rau hauv ultra- qhov kub thiab txias ib puag ncig (-40 degree), Q620E qhov cuam tshuam toughness qis dua Q690E, thiab muaj kev pheej hmoo ntawm pob txha tawg. Tsuas yog nyob rau hauv tsis yog{12}}cov qauv tseem ceeb ntawm cov haujlwm uas tsis tshua muaj, thiab thaum qhov kub thiab txias siab tshaj -20 degree, Q620E tuaj yeem suav tias yog qhov hloov pauv ib ntus tom qab kuaj xyuas lub zog ntawm cov qauv.