| Kev xaiv cov khoom siv casting ntau | |
| Khoom siv | Nta thiab Daim Ntawv Thov |
| Grey cam khwb cia hlau | Zoo fluidity, me me shrinkage tus nqi thaum lub sij hawm txias, tsis muaj zog, plasticity thiab toughness, elastic modulus txawv ntawm 80000 ~ 140000MPa nrog txawv microstructures, compressive zog yog 3 ~ 4 zaug siab dua tensile zog, hnav-resistant zoo pkev ua haujlwm thiab kev vibration absorption.Nws tsis rhiab rau kev txiav thiab muaj kev ua haujlwm zoo.Vuam kev ua haujlwm tsis zoo.Nws tsis tuaj yeem siv tau ntev dua 300 ~ 400℃.85% ~ 90% tus nqi ntawm cov khoom cam khwb cia hlau. |
| Malleable cam khwb cia hlau | Qhov kev ua tau zoo tshaj plaws yog qhov phem tshaj ntawm cov hlau cam khwb cia grey thiab zoo dua li cov hlau cam khwb cia.Nws yog siv los tsim me me nyias-walled castings uas muaj qee yam kev xav tau rau lub zog thiab toughness.Zoo corrosion kuj thiab kev ua haujlwm zoo.Qhov cuam tshuam toughness yog 3 ~ 4 npaug loj dua li ntawm grey cam khwb cia hlau. |
| Hlau Hlau | Qhov kev ua tau zoo ntawm casting yog qhov phem dua li cov hlau cam khwb cia grey, thiab nws muaj qhov tsis xws luag.Kev ua tau zoo ntawm kev txiav yog qhov zoo, thiab kev kho cua sov tuaj yeem ua rau nws qhov kev ua tau zoo hloov pauv ntau yam.Lub zog tensile yog siab dua li cov cam khwb cia hlau thiab cam khwb cia hlau, thiab qhov sib piv ntawm cov khoom muaj zog rau tensile lub zog yog siab tshaj malleable cam khwb cia hlau thiab hlau.Lub plasticity yog qhov zoo tshaj plaws nyob rau hauv cam khwb cia hlau, thiab qhov cuam tshuam toughness tsis zoo li cov hlau, tab sis ntau loj dua li ntawm grey cam khwb cia hlau.Nws muaj qhov kub thiab txias ua haujlwm zoo.Lub zog qaug zog yog siab, ze rau 45 steel, tab sis qhov rhiab heev rau kev ntxhov siab concentration yog qis dua cov hlau.Zoo hnav tsis kam, kub tsis kam thiab corrosion kuj.Qhov kev co attenuation ratio ntawm steel, ductile hlau thiab grey hlau yog 1: 1.8: 4.3.nce dav siv los ua qhov tseem ceeb. |
| Compacted Graphite Hlau | Cov khoom siv hluav taws xob ntawm vermicular graphite cam khwb cia hlau yog nruab nrab ntawm grey cam khwb cia hlau thiab ductile hlau, thiab nws muaj zoo compactness, kub tsis kam thiab hnav tsis kam.Nws qhov kev ua tau zoo casting yog zoo dua li ntawm cov hlau ductile thiab ze rau ntawm grey cam khwb cia hlau.Nws lub zog zoo ib yam li cov hlau nplaum, thiab nws muaj qhov zoo sib xws los tiv thaiv kev co, thermal conductivity thiab casting zog rau grey hlau, tab sis zoo plasticity thiab qaug zog tsis kam tshaj grey hlau.Compacted graphite cam khwb cia hlau yuav inevitably muaj ib tug npaum li cas ntawm nodular graphite.Qhov nce ntawm nodular graphite yuav ua rau nws lub zog thiab rigidity, tab sis nyob rau hauv tus nqi ntawm impairing lub peev xwm ntawm molten hlau thiab deteriorating lub workability thiab thermal conductivity ntawm castings. |
| cam khwb cia hlau | Qhov kev ua tau zoo ntawm casting yog qhov tsis zoo, qhov dej tsis zoo, thiab qhov shrinkage loj, tab sis nws muaj ntau dua kev siv tshuab, uas yog, muaj zog dua, toughness thiab plasticity.Lub zog tensile thiab compressive zog yog ze li sib npaug.Qee cov cam khwb cia tshwj xeeb muaj cov khoom tshwj xeeb xws li kub tsis kam thiab corrosion kuj |
| Casting aluminium alloy | Aluminium alloys tsuas yog 1/3 qhov ntom ntawm hlau thiab siv los ua ntau yam teeb pom kev zoo.Qee cov aluminium alloys tuaj yeem ua kom muaj zog los ntawm kev kho cua sov kom lawv muaj cov khoom zoo dua.Raws li phab ntsa thickness nce, lub zog txo qis heev. |
| cam khwb cia tooj liab | Nws tau muab faib ua ob pawg: tin bronze thiab Wuxi bronze.Tin bronze muaj qhov hnav zoo thiab corrosion tsis kam, siab zog thiab hardness, tsis zoo casting kev ua tau zoo, thiab nws yooj yim rau kev sib cais thiab shrinkage.Quenching tsis muaj zog ntxiv.Wuxi bronze feem ntau yog siv hauv txhuas bronze lossis txhuas bronze, uas muaj kev ua haujlwm tsis zoo.Aluminium bronze muaj lub zog siab, hnav tsis kam thiab corrosion kuj.Lead bronze muaj zog qaug zog, muaj zog thermal conductivity thiab acid kuj |
| Cast Brass | Loj shrinkage, feem ntau muaj zog, zoo plasticity, zoo corrosion kuj thiab hnav tsis kam.Kev ua tau zoo txiav |
| Kev sib piv ntawm cov khoom siv hlau cam khwb cia rau casting | ||||
| Hom Hlau | Grey Hlau | Malleable Hlau | Hlau Hlau | Compacted Graphite Hlau |
| Daim ntawv Graphite | Flake | Flocculent | kheej kheej | worm zoo li |
| Txheej txheem cej luam | Cam khwb cia hlau tau los ntawm kev ua tiav thawj theem | Dawb cam khwb cia hlau yog lub zog siab thiab tawv cam khwb cia hlau tau los ntawm graphitization annealing kev kho kom tau nodular graphite los ntawm spheroidization thiab inoculation kev kho kom tau vermicular graphite los ntawm vermicularization thiab inoculation kev kho mob | Nodular graphite tau los ntawm spheroidization thiab inoculation kho | Vermicular graphite tau los ntawm vermicularization thiab inoculation kho |
| Castability | Zoo | Phem tshaj grey cam khwb cia hlau | Phem tshaj grey cam khwb cia hlau | Zoo |
| Machining kev ua tau zoo | Zoo | Zoo | Zoo | Zoo |
| Abrasion tsis kam | Zoo | Zoo | Zoo | Zoo |
| Lub zog / Hardness | Ferrite: TsawgPearlite: siab dua | siab tshaj grey cam khwb cia hlau | siab heev | siab tshaj grey cam khwb cia hlau |
| Plasticity / Toughness | qis heev | ze rau cam khwb cia hlau | siab heev | siab tshaj grey cam khwb cia hlau |
| Daim ntawv thov | Lub tog raj kheej, flywheel, piston, nres log, siab valve, thiab lwm yam. | Cov khoom me me thiab nruab nrab nrog cov duab nyuaj uas cuam tshuam, xws li wrenches, kev ua liaj ua teb, lub zog | Cov khoom uas muaj zog thiab toughness yuav tsum tau, xws li combustion engine crankshafts, li qub | Cov khoom uas muaj kev ruaj ntseg nyob rau hauv thermal shock, xws li diesel cav lub tog raj kheej taub hau |
| Lus ceeb toom | low notch rhiab heev | Tsis tuaj yeem forged | High tshav kub kuj, corrosion kuj, qaug zog zog (ob zaug grey cam khwb cia hlau) | Thermal conductivity, thermal qaug zog tsis kam, kev loj hlob tsis kam thiab oxidation kuj |
Post lub sij hawm: Nov-02-2022