Q960DthiabQ960Eyog ob qho tib si ntawm Q960 series ntawm quenched thiab tempered ultra- siab- lub zog structural steels, ua raws li Suav tus qauv GB/T 16270. Lawv cov ntsiab lus zoo sib xws nyob rau hauv qhov tsawg kawg nkaus yield zog ntawm 960MPa rau seem tsawg dua los yog sib npaug rau {50mm} lub zog tensile. Txawm li cas los xij, lawv sib txawv hauv qhov qis - qhov kub thiab txias ua haujlwm, tshuaj lom neeg muaj pes tsawg leeg tswj kev ua haujlwm, thiab cov xwm txheej ntawm daim ntawv thov vim muaj qib zoo sib txawv.
Tsawg-kub Impact Performance
Qhov sib txawv tseem ceeb ntawm ob qhov nyob hauv qhov kub thiab txias ntawm Charpy V-qhov ntsuas qhov cuam tshuam thiab cov kev ua tau zoo sib xws, uas tau cuam tshuam los ntawm cov lus "D" thiab "E".
- Q960D: Nws yuav tsum dhau qhov kev ntsuam xyuas qhov cuam tshuam ntawm -20℃, thiab qhov tsawg kawg nkaus longitudinal cuam tshuam lub zog nqus yog 34J. Qhov no ua kom ntseeg tau tias nws yuav tsis ua rau tawg tawg yooj yim thaum siv nyob rau hauv qhov tsis tshua muaj - qhov chaw muaj kev kub ntxhov, ua tau raws li qhov xav tau ntawm feem ntau cov pa txias - ua haujlwm.
- Q960E: Nws muaj cov kev cai nruj dua, yuav tsum tau ua raws li qhov kev ntsuam xyuas qhov cuam tshuam ntawm -40 degree, nrog rau qhov tsawg kawg nkaus longitudinal cuam tshuam lub zog nqus ntawm 27J (qee qhov siab - cov khoom kawg tuaj yeem ncav cuag ntau dua 34J). Nws yog tsim los rau ib puag ncig uas tsis tshua muaj kub, thiab muaj peev xwm tswj tau cov qauv kev ruaj ntseg txawm tias nyob rau hauv qhov txias heev yam tsis muaj nkig tsis ua hauj lwm.
Chemical Composition Control
Txhawm rau kom ua tiav qhov sib txawv qis- qhov kub thiab txias, ob lub steels muaj qhov sib txawv ntawm kev tswj cov khoom tsis zoo thiab qhov sib piv ntawm cov ntsiab lus alloy, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus txwv ntawm phosphorus thiab sulfur uas nquag ua rau cov khoom brittleness:
| Element | Q960D | Q960E |
|---|---|---|
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025% | Tsawg dua lossis sib npaug li 0.020% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015% | Tsawg dua lossis sib npaug li 0.010% |
| Lwm yam alloys | Ib yam li Q960E nyob rau hauv qhov siab tshaj plaws txwv ntawm C (Less tshaj los yog sib npaug rau 0.2%), Si (Less tshaj los yog sib npaug rau 0.8%), Mn (Less tshaj los yog sib npaug rau 2.0%) thiab lwm yam ntsiab lus tseem ceeb; nws tuaj yeem ntxiv Nb, Ti thiab lwm yam nplej - refining cov ntsiab lus, nrog rau cov ntsiab lus tsawg kawg nkaus ntawm tsawg kawg ib lub ntsiab yog 0.015% | Raws li Q960D nyob rau hauv kev faib ua feem ntawm lub ntsiab alloy ntsiab, tab sis cov txheej txheem smelting yog ntau refined los xyuas kom meej tias tag nrho cov impurity cov ntsiab lus yog qis dua, thiaj li mus ntxiv txhim kho qis - kub toughness |
Kev tswj hwm nruj dua ntawm cov khoom tsis zoo hauv Q960E tshem tawm ntau qhov micro - tawg pib cov ntsiab lus, nteg lub hauv paus rau nws zoo heev toughness ntawm ultra- qhov kub thiab txias.
Kev tsim khoom thiab kev ua haujlwm yuav tsum tau ua
- Txheej txheem ntau lawm: Ob leeg txais yuav cov txheej txheem quenching thiab tempering, tab sis Q960E muaj cov kev xav tau ntau dua rau kev smelting thiab kev kho cua sov. Nws feem ntau yog siv cov pa oxygen converters lossis hluav taws xob rauv rau smelting, ua ke nrog lub tshuab nqus tsev degassing los txo cov ntsiab lus roj. Nyob rau hauv lub tshav kub kev kho mob theem, qhov tsis ntawm austenitizing (900 - 950 degree) thiab tempering yog ntau precisely tswj kom tsis txhob muaj qhov txo qis ntawm qis- kub toughness tshwm sim los ntawm uneven grain qauv. Q960D muaj kev tswj xyuas nruj ntawm cov txheej txheem smelting thiab tuaj yeem ua tau raws li cov qauv nrog cov tshuab nqus tsev refining.
- Vuam thiab Machining: Ob leeg yuav tsum muaj kev tswj xyuas nruj ntawm cov khoom siv vuam los tiv thaiv cov kab nrib pleb. Q960E xav tau qhov kub thiab txias dua (150 - 200 degree) thaum vuam, thiab vuam kab hluav taws xob yuav tsum tau tswj ntawm 15 - 25kJ/cm kom tsis txhob softening ntawm tshav kub - cuam tshuam cheeb tsam thiab poob ntawm ultra- qis- kub toughness. Thaum Q960D yog welded, lub preheating kub yuav qis dua me ntsis (100 - 150℃). Nyob rau hauv cov nqe lus ntawm machining, Q960E yuav tsum tau ultra- zoo grain cemented carbide cov cuab yeej los txo cov thermal stress, thaum Q960D tuaj yeem siv cov pa siab - lub zog steel machining cov cuab yeej.
Daim ntawv thov Scenario
Qhov sib txawv ntawm kev ua tau zoo txiav txim siab lawv qhov sib txawv daim ntawv thov kev taw qhia hauv engineering:
- Q960D: Nws yog dav siv nyob rau hauv dav low -kub thiab hnyav- load scenarios, xws li cov booms thiab winch nruas ntawm nruab nrab thiab loj excavators, lub ntsiab lug ntawm cov choj zoo tib yam, cov hydraulic txhawb nqa ntawm cov mines nyob rau sab qaum teb Tuam Tshoj thiab lwm yam khoom siv thiab cov qauv. Nws tuaj yeem sib npaug kev ua tau zoo thiab tus nqi, thiab yog qhov kev xaiv tseem ceeb hauv Q960 series rau kev ua haujlwm siab -lub zog loj.
- Q960E: Nws yog tsuas yog siv nyob rau hauv tsis tshua muaj - kub thiab siab - kev nyab xeeb - xav tau teb. Piv txwv li, lub crane caj npab thiab chassis ntawm engineering machinery nyob rau hauv alpine cheeb tsam xws li Qinghai - Tibet Plateau, cov txheej txheem ntawm offshore platforms nyob rau hauv lub polar seas, lub hulls ntawm lub nkoj sailing nyob rau hauv frigid zones, thiab txawm lub tiv thaiv qauv ntawm lub teeb armored tsheb ua hauj lwm nyob rau hauv lub txias. Nws kuj tseem tuaj yeem siv rau hauv cov kab kev txhawb nqa ntawm super siab- cov tsev nce siab hauv cov cheeb tsam txias kom ntseeg tau cov qauv kev nyab xeeb thaum lub caij ntuj no.
Nqi thiab khoom siv
Q960E muaj cov nqi tsim khoom ntau dua vim kev tswj cov txheej txheem smelting nruj dua, cov txheej txheem kho cua sov ntau dua thiab cov khoom tsim nyog qis dua. Nws tus nqi lag luam feem ntau yog 15% - 30% siab dua li ntawm Q960D. Hais txog kev muab khoom, Q960D muaj cov cuab yeej tsim khoom lag luam thiab cov peev txheej loj hauv tsev, uas tuaj yeem ua tau raws li loj - batch xaj. Q960E muaj kev cuam tshuam ntau dua, thiab tsuas yog ob peb lub tshuab steel loj (xws li Wuyang Hlau thiab Hlau) muaj peev xwm tsim khoom ruaj khov, thiab lub voj voog khoom siv ntev dua.
Dab tsi yog qhov "D" thiab "E" hauv Q960D thiab Q960E sawv cev rau dab tsi, thiab lawv qhov tseem ceeb cuam tshuam rau kev ua haujlwm yog dab tsi?
Cov lus kawg "D" thiab "E" sawv cev rau cov qib zoo ntawm cov hlau, uas feem ntau yog qhov txawv ntawm lawv qhov qis- qhov ntsuas kub ntawm qhov ntsuas kub raws li tau teev tseg hauv Suav tus qauv GB/T 16270. Q960D yuav tsum dhau Charpy V- qhov ntsuas qhov cuam tshuam ntawm -20℃Jtion , nrog qhov tsawg kawg nkaus ntawm 3 qhov kev cuam tshuam. Q960E muaj cov kev cai nruj dua, yuav tsum tau muaj qhov kev ntsuam xyuas qhov cuam tshuam ntawm -40 degree, thiab qhov tsawg kawg nkaus qhov ntev ntawm lub zog nqus yog 27J (cov khoom siv zoo tuaj yeem tshaj 34J). Qhov sib txawv no txiav txim siab lawv qhov kev hloov pauv mus rau qhov chaw qis qis.
Cov kev txwv ntawm cov teeb meem tsis zoo xws li phosphorus thiab sulfur txawv li cas ntawm Q960D thiab Q960E, thiab lub luag haujlwm no txawv li cas?
Q960D tso cai rau cov ntsiab lus phosphorus mus txog 0.025% thiab cov ntsiab lus sulfur mus txog 0.015%. Rau Q960E, cov ntsiab lus phosphorus raug txwv kom tsawg dua lossis sib npaug rau 0.020% thiab sulfur kom tsawg dua lossis sib npaug li 0.010%. Ob lub ntsiab lus no nquag ua rau cov khoom siv brittleness. Kev tswj nruj dua ntawm lawv cov ntsiab lus hauv Q960E txo qis cov ntsiab lus pib ntawm microcracks hauv cov hlau, uas yog ib qho tseem ceeb lav rau cov hlau kom muaj zog zoo heev hauv ultra{10}} qis- qhov kub thiab txias thiab tsis txhob tawg tawg.
Cov qib steel thoob ntiaj teb twg tuaj yeem Q960D thiab Q960E sib haum, thiab dab tsi yog qhov tseem ceeb ntawm cov ntawv xov xwm no?
Q960D yog sib npaug rau S960Q qib hauv European tus qauv EN10025 - 6, thaum Q960E sib npaug rau S960QL qib hauv tib tus qauv European. Cov ntawv xov xwm no yog qhov tseem ceeb rau kev hla - ciam teb engineering tej yaam num. Q960D tuaj yeem hloov S960Q ncaj qha rau hauv ib puag ncig kom ua tau raws li cov kev xav tau sib xws ntawm European - ua cov khoom siv pa. Q960E, sib xws rau S960QL uas hais txog qhov toughness zoo dua thiab weldability, tuaj yeem ua tau raws li qhov kev kuaj xyuas nruj thiab kev ua haujlwm ruaj khov ntawm European siab -kawg polar khoom thiab cov khoom tseem ceeb.