INCONEL 625 alloy (UNS NO 6625) INCONEL 625 tshuaj muaj pes tsawg leeg thiab cov qauv siv
Alloy 625 (UNS 6625) yog austenitic super tshav kub-resistant alloy nrog npib tsib xee ua lub ntsiab tivthaiv. Nws muaj cov khoom zoo heev ntawm kev tiv thaiv oxidation thiab corrosion, thiab yog tsim rau siv nyob rau hauv dav hlau aircraft engine ib puag ncig, aviation, thiab tshuaj ua. Ntau teb. Cov hlau tseem muaj qhov ua rau qaug zog tsis zoo ntawm qhov kub thiab txias li 2, 000 degrees Fahrenheit (1,093 degrees Celsius). Lub zog ntawm 625 alloy los ntawm cov khoom siv ntxiv dag zog ntawm molybdenum thiab niobium muaj nyob rau hauv nickel-chromium alloy. Cov ntsiab lus no kuj muab cov alloy zoo heev corrosion-resistant zog. Thaum lub alloy yog tsim los rau lub zog nyob rau hauv high-kub ib puag ncig, nws cov alloyed muaj pes tsawg leeg muab ib tug high degree ntawm tsis kam mus rau corrosion, raws li zoo raws li tsis kam mus rau ntau yam ntawm oxidizing thiab non-oxidizing ib puag ncig. Cov ntsiab lus chromium thiab molybdenum ua rau cov hlau zoo heev hauv kev tiv thaiv corrosion los ntawm chloride ions.
Cov yam ntxwv, cov ntsiab lus siab nickel txhim kho cov hlau tsis kam rau chloride kev nyuaj siab corrosion cracking. Cov khoom siv tau zoo heev thiab yooj yim rau vuam dua li ntau cov nickel-based alloys. Txawm tias thaum raug welded, lub alloy tseem resistant rau intergranular corrosion.
Corrosion thiab oxidation tsis kam
Cov ntsiab lus siab ntawm chromium thiab titanium nyob rau hauv alloy 625 muab lub alloy nrog ib tug high degree ntawm tsis kam mus pitting corrosion thiab fission corrosion. Nws muaj kev tiv thaiv corrosion nyob rau hauv chloride-contaminated media, xws li seawater, nruab nrab ntsev thiab dej ntsev. Cov hlau yog resistant rau ntau yam ntawm corrosive media xws li los ntawm oxidizing ib puag ncig mus rau nruab nrab mitigated oxidizing ib puag ncig. Geothermal ntsev dej ntsuas cov qhabnias qhia tau hais tias 625 alloy muaj qhov ua haujlwm siab heev rau cov dej hauv dej, thiab nws cov corrosion kuj yog piv rau lwm yam titanium. Simulated pipeline gas desulfurization ib puag ncig kev ntsuam xyuas qhia tau hais tias 625 alloy muaj corrosion kuj tsis tshua muaj siab piv nrog 316L khoom, thiab nws corrosion kuj yog piv rau 276 alloy.
Antioxidant zog
Alloy 625 muaj cov khoom zoo heev ntawm kev tiv thaiv oxidation thiab phosphorus zoo li corrosion nyob rau hauv qhov kub thiab txias txog 2000 degrees Fahrenheit (1093 degrees Celsius). Nyob rau hauv cyclic cua sov thiab txias tej yam kev mob, 625 alloy outperforms lwm high-temperature resistant alloys.
Inconel625 ua daim ntawv thov
Thermal processing:
1. Lub thermal ua haujlwm kub ntau ntawm Inconel625 yog 1150 degree ~ 900 degree, thiab txoj kev txias yog dej quenching lossis lwm txoj kev ua kom txias.
2. Yuav kom tau txais kev ua haujlwm zoo tshaj plaws thiab kev tiv thaiv corrosion, kev kho annealing yuav tsum tau nqa tawm tom qab ua haujlwm kub.
3. Thaum cua sov, cov khoom tuaj yeem ncaj qha mus rau hauv lub cub tawg uas tau ua kom sov rau qhov siab tshaj plaws ua haujlwm kub. Tom qab khaws cia kom sov rau lub sijhawm txaus (60 feeb ntawm lub sijhawm tuav yog xav tau rau txhua 100mm thickness), nws tuaj yeem raug tso tawm sai sai ntawm lub cub tawg thiab ua haujlwm thermally hauv qhov kub thiab txias ntawm qhov ntsuas kub. Thaum cov khoom kub poob qis dua qhov kev ua haujlwm thermal, nws yuav tsum tau rov ua dua.
Ua haujlwm txias:
1. Cov khoom ua haujlwm txias yuav tsum nyob hauv lub xeev annealed. Kev ua haujlwm hardening ntawm Inconel 625 yog ntau dua li ntawm austenitic chromium-nickel stainless hlau, yog li cov khoom siv yuav tsum tau xaiv.
2. Thaum lub sij hawm ua hauj lwm txias, intermediate annealing yog yuav tsum tau.
3. Thaum lub ntim ntim ntau dua 15%, kev kho annealing yuav tsum tau ua tom qab ua haujlwm kub.
Nplai tshem tawm thiab pickling:
1. Qhov saum npoo oxide ntawm Nicrofer6020hMo alloy thiab adhesion ntawm vuam slag nyob ib ncig ntawm lub vuam yog muaj zog dua li ntawm cov hlau tsis tshua muaj hlau alloy. Nws raug nquahu kom siv cov khoom siv zoo-grained abrasive siv los yog nplua-grained sib tsoo log rau kev sib tsoo.
2. Cov oxide zaj duab xis yuav tsum tau tawg los ntawm kev sib tsoo los yog ntsev da dej pretreatment ua ntej pickling nrog H NO 3 / HF tov kua qaub ntawm lub sij hawm thiab kub.
tshuab
Inconel 625 yuav tsum tau machined tom qab kev kho cua sov. Vim yog kev ua haujlwm hardening ntawm cov khoom, nws yog qhov zoo dua los siv cov hlau qis dua li cov tshuab
Standard austenitic stainless hlau yog machined nrog tsawg txiav speeds thiab hnyav feeds kom tau nyob rau hauv lub chaw ua hauj lwm-hardened nto.
vuam
Inconel 625 yog tsim rau vuam siv cov txheej txheem vuam ib txwm, xws li tungsten electrode inert gas shielded vuam, plasma arc vuam, phau ntawv sub-arc vuam, hlau ncej inert roj shielded vuam, thiab melting ncej inert roj shielded vuam. Cov ntaub ntawv yuav tsum tau welded yuav tsum nyob rau hauv ib tug daws-kho lub xeev kom tshem tawm cov nplai, roj stains thiab ntau yam cim thiab cim. Kev ua haujlwm vuam yuav tsum tau ua raws li cov lus qhia uas tsis muaj cua sov, nrog rau qhov kub ntawm qhov sib txawv tsis tshaj 150 degree. Kev kho cua sov ua ntej thiab tom qab vuam tsis tas yuav tsum tau ua lawm.
