Q460D thiabQ500D yog ob qho tib si qis- alloy siab- lub zog cov qauv hlau ntawm qib D, uas yuav tsum tau ua kom tau raws li qhov yuav tsum tau muaj kev cuam tshuam toughness ntawm -20℃. Qhov sib txawv ntawm 40MPa hauv lawv lub zog tawm los ua rau muaj qhov sib txawv ntawm cov tshuaj lom neeg tsim, txheej txheem nyuaj thiab kev tso npe thov. Tus qub yog tus nqi -kev xaiv zoo rau cov pa qis- kub siab- cov haujlwm muaj zog, thaum tom kawg yog qhov tsim nyog rau cov xwm txheej uas yuav tsum tau muaj peev xwm thauj khoom ntau dua thiab lub teeb yuag.
Core Mechanical Properties
Qhov sib txawv tseem ceeb ntawm ob lub steels nyob rau hauv lub zog Performance index, thiab muaj kev hloov maj mam nyob rau hauv kev cuam tshuam toughness thiab lwm yam khoom kom phim lawv txoj hauj lwm, uas ncaj qha txiav txim lawv load- bearing peev txwv. Cov kev txwv tshwj xeeb tau qhia hauv cov lus hauv qab no:
| Mechanical Property Indicator | Q460D | Q500D |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | Ntau dua lossis sib npaug rau 460MPa (rau thickness Tsawg dua lossis sib npaug li 16mm) | Ntau dua lossis sib npaug rau 500MPa (rau thickness Tsawg dua lossis sib npaug li 50mm) |
| Tensile Strength Range | 550 - 720MPa | 610 - 770MPa (tuaj yeem ncav cuag 800MPa hauv quenched thiab tempered xeev) |
| -20℃cuam tshuam lub zog | Ua tau raws li tus qauv yuav tsum tau (tus nqi ntau dua lossis sib npaug rau 34J) | Ntau dua lossis sib npaug rau 47J (ntev qauv) |
| Elongation | Ntau dua lossis sib npaug li 18% | Ntau dua lossis sib npaug li 17% |
Q500D muaj cov txiaj ntsig zoo hauv kev tawm dag zog thiab lub zog tensile, thiab nws -20℃cuam tshuam lub zog yog qhov siab dua li ntawm Q460D, uas qhia tau tias muaj kev ntseeg siab qis dua -kub toughness. Txawm hais tias Q500D's elongation yog me ntsis qis dua Q460D's, nws tseem tuav cov yas zoo, uas yog vim nws txoj kev tswj xyuas ntau dua ntawm cov hlau alloy thiab cov txheej txheem ntau lawm optimization. Ob leeg tsim nyog rau qhib-cov haujlwm huab cua hauv thaj chaw txias uas qhov kub thiab txias nyob ib puag ncig -20 degree, tab sis Q500D ruaj khov dua nyob rau hauv huab cua tsis tshua muaj xwm txheej ceev ceev.
Tshuaj muaj pes tsawg leeg thiab cov txheej txheem ntau lawm
Qhov sib txawv ntawm kev ua tau zoo yog cov hauv paus hauv kev tsim cov tshuaj lom neeg muaj pes tsawg leeg thiab txhim kho cov txheej txheem ntau lawm. Ob lub steels tau txais cov txheej txheem sib txawv kom sib npaug tus nqi thiab kev ua haujlwm:
Tshuaj muaj pes tsawg leeg:
Q460D txais yuav tus nqi -cov qauv muaj txiaj ntsig zoo. Cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.20%, cov ntsiab lus manganese tsis tau teev meej meej tab sis feem ntau tswj tau tsawg dua lossis sib npaug li 1.80%, thiab tag nrho cov ntsiab lus ntawm microalloy xws li niobium, vanadium thiab titanium tsawg dua lossis sib npaug li 0.20%. Nws nruj me ntsis tswj cov ntsiab lus ntawm cov teeb meem impurities (phosphorus Tsawg dua los yog sib npaug rau 0.030%, sulfur Tsawg dua los yog sib npaug rau 0.025%), thiab tsis ntxiv ntau qhov siab - nqi alloy cov ntsiab lus. Nws tsuas yog tso siab rau kev sib koom ua ke ntawm cov ntsiab lus sib xyaw thiab ib qho me me ntawm microalloy ntsiab kom ua tiav nws cov ntsuas kev ua tau zoo.
Q500D muaj cov qauv tsim ua kom zoo dua qub. Cov ntsiab lus carbon yog nruj me ntsis tswj ntawm tsawg dua los yog sib npaug rau 0.18% kom txo tau qhov txias tawg rhiab heev. Cov ntsiab lus manganese tsawg dua lossis sib npaug li 1.80%, thiab cov ntsiab lus ntawm microalloy ntsiab yog raug kho kom raug (niobium Tsawg dua lossis sib npaug rau 0.06 - 0.11%, vanadium Tsawg dua lossis sib npaug li 0.12%). Lub caij no, nws nruj me ntsis txwv cov khoom seem (chromium Tsawg dua lossis sib npaug rau 0.60%, npib tsib xee Tsawg dua lossis sib npaug rau 0.80%). Cov ntsiab lus ntawm kev puas tsuaj impurities yog tswj nruj dua (sulfur Tsawg dua los yog sib npaug rau 0.015 - 0.025%), uas zoo txhim kho cov purity thiab kev ua tau zoo ntawm cov hlau.
Txheej txheem ntau lawm:
Q460D feem ntau yog xa mus rau hauv qhov qub dov lossis lub xeev normalized. Nws tsuas yog tso siab rau TMCP (Thermo-Cov Txheej Txheem Kev Tswj Xyuas Txheej Txheem) txhawm rau tswj qhov kub thiab txias txias, tsim cov qauv sib xws, nrog kev paub tab thiab qis- cov txheej txheem nqi, uas yog tsim rau loj - nplai batch ntau lawm.
Q500D txhawb nqa kev xa khoom yooj yim xws li quenching thiab tempering, TMCP lossis normalizing + tempering. Thaum lub sij hawm tsim khoom, nws kuj siv LF refining thiab VD nqus degassing txheej txheem los txo cov ntsiab lus ntawm kev suav. Cov txheej txheem ntau dua ua kom ntseeg tau tias nws tuaj yeem ua tiav lub zog siab dua thaum tswj kev ua haujlwm zoo heev, tab sis qhov sib thooj ntau lawm thiab tus nqi kuj nce ntxiv.
Kev ua tau zoo
Qhov sib txawv ntawm qhov sib xyaw thiab cov qauv ua rau ob lub steels muaj qhov sib txawv rau kev sib txuas xws li vuam thiab kev tsim, uas cuam tshuam rau kev tsim kho thiab kev tswj tus nqi:
Vuam Performance: Q460D muaj qhov zoo weldability, yog sib xws nrog arc vuam, roj shielded vuam thiab lwm yam txheej txheem, thiab tsis muaj qhov yuav tsum tau ntau tshaj ntawm preheating kub. Rau cov phaj tuab, yooj yim preheating tuaj yeem ua tau raws li qhov xav tau ntawm vuam. Q500D muaj cov pa roj carbon sib npaug tsawg dua lossis sib npaug li 0.47%, uas kuj muaj kev vuam zoo, tab sis vim nws cov qib siab zog, nws raug nquahu kom siv qis - cov khoom siv hydrogen welding thaum vuam, thiab tswj cov vuam cua sov kom zoo kom tsis txhob muaj qhov muag ntawm cov cua sov- cuam tshuam lub zog tag nrho.
Kev ua tau zoo: Q460D tuaj yeem ua tiav los ntawm cov pa taws txiav thiab cov txheej txheem txias txias. Thaum txiav, nws tsuas yog yuav tsum tau khaws ib lub qhov 3 - 5 hli lossis qhov nyiaj ua tiav, thiab daim hlau nyias tuaj yeem ua kom txias - tsim ncaj qha nrog lub vojvoog me me. Q500D muaj kev ua haujlwm siab dua. Txawm hais tias nws kuj tseem txhawb cov nplaim taws txiav thiab khoov txias, rau cov phaj tuab lossis cov khoom sib xws - zoo li tus, nws yog ib qho tsim nyog yuav tsum tau ua kom zoo dua cov txheej txheem los tiv thaiv cov kab nrib pleb ntawm qhov chaw, thiab qee zaum kub sib sau los yog xa tawm - kev kho cua sov yog xav tau.
Daim ntawv thov Scenario
Qhov sib txawv ntawm kev ua tau zoo thiab cov nqi ua haujlwm ua rau ob lub steels tsim kom meej daim ntawv ciam teb, uas yog raws li kev taw qhia rau dav dav - zog tej yaam num thiab siab - xav tau cov ntsiab lus tseem ceeb:
Q460D: Nws yog tus nqi -kev xaiv zoo rau cov pa qis- kub siab - cov haujlwm muaj zog thiab tau siv dav hauv ntau yam kev lag luam dav dav. Hauv kev tsim kho thiab kev txuas hniav, nws yog siv rau kev thauj khoom -cov kabmob ntawm cov choj loj thiab cov ntsiab lus tseem ceeb ntawm cov tsev siab - nce siab. Piv txwv li, nyob rau hauv ib co choj tej yaam num nyob rau hauv lub txias qaum teb cheeb tsam, nws ua kom muaj kev ruaj ntseg nyob rau hauv qis - ib puag ncig kub. Hauv kev tsim cov tshuab, nws yog siv rau cov txheej txheem ntawm excavators, cranes thiab cov khoom siv tsuas, ntsuas qhov ua tau zoo thiab cov nqi ntawm cov khoom siv. Tsis tas li ntawd, nws kuj yog siv rau hauv nkoj hull qhov chaw thiab loj welded structural qhov chaw xws li cov khoom hnyav hauv paus.
Q500D: Nws yog tsuas yog siv rau cov khoom tseem ceeb uas xav tau lub zog siab thiab txhim khu kev qha qis -kub toughness, thiab muaj qhov zoo ntawm cov qauv tsim. Nyob rau hauv engineering machinery, nws yog siv los ua excavator booms, crane load- bearing caj npab thiab kuv lub tsheb chassis, uas yuav txo tau qhov hnyav ntawm cov khoom los ntawm 20% - 30% nyob rau hauv tib lub load. Hauv kev tsim kho vaj tse, nws yog siv rau qhov loj -span steel kem girders ntawm cov choj thiab cov kav dej siab ntawm cov chaw nres tsheb hydropower. Tshwj xeeb tshaj yog rau Z35 qib Q500D, nws muaj kev tiv thaiv zoo heev -lamellar tearing kev ua tau zoo thiab tsim nyog rau tuab - phaj cov qauv tseem ceeb. Nyob rau hauv lub zog teb, nws kuj tseem siv tau los ua cov khoom muaj feem xyuam ntawm cov cua zog yees, yoog raws qhov chaw ua haujlwm hnyav ntawm qhov chaw txias.
Cov teeb meem dab tsi yuav tsum tau them sai sai rau thaum hloov Q460D nrog Q500D hauv kev hloov pauv ntawm cov khoom siv crane?
Ua ntej, kho cov txheej txheem vuam. Q500D yuav tsum muaj tsawg- cov khoom siv hydrogen welding, thiab vuam cov cua sov yuav tsum tau tswj nruj me ntsis kom tsis txhob softening ntawm tshav kub- thaj tsam cuam tshuam. Thib ob, optimize cov qauv tsim. Txij li thaum Q500D muaj lub zog ntau dua, qhov loj me ntawm cov qauv tsim tuaj yeem raug txo kom tsim nyog kom paub lub teeb yuag, tab sis nws yog ib qho tsim nyog los txheeb xyuas cov qauv nruj kom tiv thaiv tsis txaus rigidity. Thaum kawg, paub meej tias lub xeev xa khoom. Nws raug nquahu kom xaiv cov quenched thiab tempered Q500D rau cov khoom tseem ceeb-cov kabmob kom ntseeg tau tias kev ua haujlwm ruaj khov.
Vim li cas Q500D ntau dua li Q460D feem ntau xaiv rau cov kav dej siab ntawm cov chaw nres tsheb hauv cov chaw txias?
Qhov laj thawj tseem ceeb yog tias cov kav dej siab ntawm cov chaw nres tsheb yuav tsum tau nqa cov dej loj loj thiab ntsib qhov ntev -lub sij hawm qis- qhov kub thiab txias. Q500D muaj 40MPa siab tshaj tawm lub zog tshaj Q460D, uas tuaj yeem tiv taus lub siab load thiab txo qhov kev pheej hmoo ntawm deformation. Tsis tas li ntawd, nws -20℃cuam tshuam lub zog yog siab li 47J, uas yog ntau dua li ntawm Q460D, uas tuaj yeem zam qhov tawg ntawm cov yeeb nkab steel los ntawm qhov kub thiab txias los ntawm kev hloov pauv tam sim ntawd lossis dej ntws cuam tshuam, thiab txhim kho kev nyab xeeb thiab kev pabcuam lub neej ntawm cov khoom siv hauv chaw nres tsheb hydropower.
Rau me me thiab nruab nrab- cov phiaj xwm choj loj nrog cov peev nyiaj tsawg, nws puas tuaj yeem hloov Q500D nrog Q460D?
Nws ua tau raws li qee yam xwm txheej. Ua ntej, nws yog ib qho tsim nyog yuav tsum ua raws li kev ntsuas lub zog ntawm cov qauv. Rau qhov tsis yog - qhov tseem ceeb load- cov kabmob xws li kev txhawb nqa ntawm cov txuas hniav, Q460D tuaj yeem ua tau raws li qhov yuav tsum tau ua tom qab kuaj xyuas lub zog. Qhov thib ob, qhov loj me ntawm cov khoom tuaj yeem ua kom zoo ntxiv rau qhov tsis muaj zog ntawm Q460D piv nrog Q500D. Txawm li cas los xij, rau cov khoom tseem ceeb- cov kabmob xws li cov kab teeb ci tseem ceeb uas muaj cov khoom loj thiab cov kev ntxhov siab rau lub sijhawm ntev, nws tsis pom zoo kom hloov lawv li casually, txwv tsis pub nws yuav ua rau muaj kev phom sij xws li kev ua haujlwm tsis zoo thiab txo lub neej kev pab cuam.