Q960D thiabQ690D yog ob qho tib si hauv tsev qis- alloy siab- lub zog cov qauv hlau nrog tib qib zoo "D" (ua tau raws li qhov yuav tsum tau muaj qhov hnyav ntawm -20 degree), tab sis muaj qhov sib txawv ntawm qhov muaj zog. Cov kev sib txawv no ua rau muaj qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg, cov kev xav tau ntawm kev ua haujlwm, kev siv cov xwm txheej thiab lwm yam.
Tshuaj muaj pes tsawg leeg
Ob lub steels nruj me ntsis tswj cov teeb meem impurities los xyuas kom meej toughness, tab sis Q960D muaj nruj dua tswj cov phosphorus thiab sulfur cov ntsiab lus kom phim nws ultra{1}siab zog, thiab cov feem ntawm alloy ntsiab yog optimized ntau dua.
| Element | Q960D | Q690D |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.20% | 0.18%-0.28% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.80% | 0.20%-0.80% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 2.00% | 1.20%-1.80% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025% | Tsawg dua lossis sib npaug li 0.025% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015% | Tsawg dua lossis sib npaug li 0.015% |
| Cov hlau alloy | Muaj Cr (Less tshaj los yog sib npaug rau 1.50%), Ni (Less tshaj los yog sib npaug rau 2.00%), Mo (Less tshaj los yog sib npaug rau 0.70%) thiab lwm yam khoom los txhim kho lub zog, thiab ntxiv Nb, Ti thiab lwm yam khoom rau refine nplej | Muaj Cr (0.30%-0.60%), Mo (0.20%-0.40%) thiab lwm yam khoom, thiab micro-alloying ntsiab xws li Nb thiab Ti yog ntxiv kom sib npaug zog thiab toughness |
Mechanical Properties
Qhov tseem ceeb tshaj qhov sib txawv ntawm ob yog nyob rau hauv lub zog tawm los. Q960D belongs rau ultra- siab- lub zog hlau, thaum Q690D yog siab - lub zog steel. Cov ntsuas kev ua tau zoo tshwj xeeb yog txawv heev:
| Performance Indicator | Q960D | Q690D |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 960MPa (rau thickness Tsawg dua lossis sib npaug li 50mm) | Ntau dua los yog sib npaug rau 690MPa (rau thickness Tsawg dua los yog sib npaug rau 16mm; Ntau dua los yog sib npaug rau 630MPa thaum thickness nce mus rau 100mm) |
| Tensile zog | 980 - 1150MPa | 730 - 900MPa |
| Elongation | Ntau dua lossis sib npaug li 10% | Ntau dua lossis sib npaug li 16% |
| Impact toughness | Ua tau raws li qhov yuav tsum tau ua ntawm qhov ntsuas qhov ntsuas ntawm -20 degree, nrog kev ua haujlwm zoo rau cov pob txha tawg | Lub zog cuam tshuam loj dua lossis sib npaug ntawm 34J ntawm -20℃, thiab zoo heev qis -kub los tiv thaiv pob txha |
| Kev ua haujlwm qaug zog | Lub zog tawm los ntau dua ua rau txo qis qaug zog tawg kev loj hlob tus nqi, thiab zoo dua tiv thaiv kev hloov pauv | Kev tiv thaiv zoo - qaug zog ua haujlwm, uas tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov xwm txheej dav dav dav dav (lub neej qaug zog Ntau dua lossis sib npaug li 2 × 10⁶ npaug raws li ISO 12107 tus qauv) |
Kev ua thiab vuam yuav tsum tau
Qhov sib txawv ntawm lub zog thiab cov qauv ua rau lawv cov txheej txheem nyuaj thiab cov txheej txheem tsis sib txawv:
- Q960D: Nws yog xa hauv lub xeev quenched thiab tempered. Rau cov phaj tuab saum toj no 30mm, yuav tsum tau ua kom sov ua ntej ua ntej nplaim taws txiav kom tsis txhob tawv tawv ntawm cov cua sov- thaj tsam cuam tshuam. Thaum vuam, cov pa roj carbon sib npaug yuav tsum tau tswj nruj heev. Txawm hais tias nws cov qauv tsim suav nrog kev ua haujlwm ntawm weldability, kev vuam ntau dua preheating kub thiab kev tswj xyuas cov khoom siv hluav taws xob ntau dua tseem yuav tsum tau tiv thaiv vuam tawg.
- Q690D: Nws tuaj yeem xa hauv ntau lub xeev xws li kub dov, normalizing thiab TMCP. Nws qhov kev ua haujlwm vuam yog qhov sib npaug, nrog cov pa roj carbon sib npaug tsawg dua lossis sib npaug li 0.65%. Nws yog tsim rau arc vuam, roj shielded vuam thiab lwm yam txheej txheem. Cov txheej txheem vuam yog qhov ua tau zoo, thiab qhov tsim nyog tus nqi ntawm welds yog tshaj 98%.
Daim ntawv thov Scenario
Daim ntawv thov teb yog sib txawv raws li kev thauj khoom -cov kev cai thiab cov nqi txiav txim siab:
- Q960D: Nws yog tsuas yog siv nyob rau hauv qhov tseem ceeb load- bearing Cheebtsam nrog lub zog siab. Piv txwv li, nws yog siv rau cov thee mine hydraulic kev txhawb nqa (hloov Q690 steel tuaj yeem txo qhov hnyav ntawm ib qho kev txhawb nqa hydraulic los ntawm 20%), cua zog yees, chaw nres nkoj cranes, thiab siab- tiv taus cov plhaub ntawm qhov tob submersibles. Nws kuj tseem siv tau rau cov thav duab ntawm cov tsheb mining thiab lwm yam khoom siv hnyav uas yuav tsum tau ua kom muaj zog thiab hnyav.
- Q690D: Nws yog dav siv nyob rau hauv dav dav siab -load scenarios. Nyob rau hauv lub tshav pob ntawm infrastructure, nws yog siv rau kab teeb thiab kab ntawm super high -nce vaj tse thiab lub ntsiab load- bearing lug ntawm loj - ncua choj. Hauv kev tsim cov cuab yeej siv, nws yog siv rau lub chassis ntawm cov tsheb hnyav, nkoj decks, thiab cov khoom siv hauv kev tsim kho xws li excavators. Nws kuj tseem siv tau rau cov hlab ntsha siab thiab cov roj thiab cov kav dej hauv lub zog.
Dab tsi yog qhov txawv ntawm cov khoom siv kho tshuab ntawm Q960D thiab Q690D?
Lub ntsiab sib txawv yog nyob rau hauv lub zog tawm los. Q960D yog ib qho ultra-siab- lub zog steel nrog qhov tsawg kawg nkaus lub zog ntawm 960MPa thiab lub zog tensile xws li 980MPa txog 1150MPa, tab sis nws qhov elongation tsuas yog ntau dua lossis sib npaug li 10%. Q690D yog lub siab- lub zog steel nrog qhov tsawg kawg nkaus lub zog ntawm 690MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) thiab lub zog tensile ntawm 730MPa - 900MPa. Nws muaj ductility zoo dua nrog kev elongation ntawm ntau dua lossis sib npaug li 16%. Tsis tas li ntawd, Q960D muaj qhov qaug zog qis dua qhov kev loj hlob thiab muaj zog tiv thaiv kev hloov pauv.
Puas yog Q960D thiab Q690D muaj qhov sib txawv hauv lawv lub xeev xa khoom thiab kev ua haujlwm nyuaj?
Yog, muaj qhov sib txawv pom tseeb. Q960D feem ntau yog xa mus rau hauv lub xeev quenched thiab tempered kom ntseeg tau tias nws ultra- siab zog thiab cov qauv sib xws. Rau cov phaj tuab, preheating yuav tsum tau ua thaum txiav, thiab kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob yog tsim nyog thaum vuam kom tsis txhob tawg. Q690D muaj ntau lub xeev xa khoom yooj yim, suav nrog kub dov, normalizing, TMCP, thiab lwm yam. Nws cov txheej txheem txiav thiab vuam yog ntau cov pa, thiab nws tsis xav tau cov txheej txheem nruj heev, yog li tag nrho cov txheej txheem nyuaj yog qis dua li Q960D.
Hauv kev ua haujlwm ntawm engineering machinery, thaum twg nws tsim nyog xaiv Q960D es tsis txhob Q690D?
Q960D yog qhov zoo dua yog tias cov cuab yeej muaj cov kev cai nruj ntawm kev txo qhov hnyav thaum ua haujlwm siab. Piv txwv li, thaum tsim cov thee mine hydraulic txhawb nqa thiab chaw nres nkoj crane booms, siv Q960D es tsis txhob Q690D tuaj yeem txo qhov hnyav ntawm cov khoom siv li 20% nyob rau hauv tib lub load-cov kabmob muaj peev xwm, uas ua rau cov khoom siv zog ua haujlwm tau zoo thiab ua haujlwm yooj yim. Txawm li cas los xij, yog tias cov cuab yeej tsuas yog xav tau kom ua tau raws li qhov siab dav dav - cov kev xav tau ntawm kev thauj khoom thiab kev siv nyiaj tsawg, Q690D yog tus nqi ntau dua - siv tau.
Puas muaj qhov sib txawv hauv daim ntawv thov ntawm Q960D thiab Q690D hauv lub zog hluav taws xob?
Lawv lub hom phiaj ntawm kev thov yog txawv. Q960D feem ntau yog siv rau qhov tseem ceeb siab - siab thiab siab - lub zog lub zog, xws li siab - cov hlab ntsha hauv lub zog thiab cov tub ntxhais thauj khoom- cov kabmob ntawm cov cua zog yees. Q690D yog siv ntau dua hauv cov khoom siv hluav taws xob zoo ib yam, xws li cov khoom siv hluav taws xob ntauwd, roj thiab roj kav dej, thiab qis -kub cia tanks. Nws tuaj yeem ua tau raws li lub zog thiab qis- qhov kub thiab txias qhov xav tau ntawm cov khoom siv hluav taws xob uas tsis muaj nqi tsim khoom ntau dhau.
Vim li cas Q960D muaj kev tswj hwm nruj dua cov ntsiab lus alloy dua li Q690D?
Vim tias Q960D xav tau kom ua tiav lub zog muaj zog ntau dua li Q690D. Nws tsis tsuas yog tswj cov ntsiab lus ntawm C, Si thiab Mn tab sis kuj ntxiv cov feem ntau dua ntawm Cr, Ni thiab Mo los txhim kho lub zog ntawm cov hlau los ntawm kev daws teeb meem ntxiv dag zog thiab nag lossis daus. Nyob rau tib lub sijhawm, cov ntsiab lus xws li Nb thiab Ti tau ntxiv rau kev ua kom zoo dua cov nplej, uas tuaj yeem ua rau txo cov tawv nqaij los ntawm kev txhim kho lub zog. Q690D tsuas yog xav kom sib npaug ntawm lub zog dav dav thiab kev ua tiav, yog li hom thiab kev faib ua feem ntawm cov ntsiab lus alloy yog qhov nruab nrab.