1. Dab tsi yog qhov kev txhais cov ntsiab lus metallurgical thiab ntxiv dag zog rau kev siv tshuab ntawm Inconel 718 uas ua rau nws cov kab ke muaj txiaj ntsig zoo rau kev kub siab?
Inconel 718 (Tsis yog N07718) yog ib qho nag lossis daus {2} chromium zoo nkauj ntawm ultra {4} lub zog zoo, teeb meem, thiab ib puag ncig tsis kam. Daim Ntawv Line Bar yog qhov tseem ceeb raw cov khoom siv rau machining tseem ceeb. Nws cov khoom yog tau los ntawm nws cov kev siv tshuaj thiab kev kho cua sov tshwj xeeb.
Gamma ob npaug ntawm Prime (') ntxiv dag zog: Tus Alloy's Esceting Feature yog nws txoj kev txhawb nqa los ntawm kev sib koom ua ntej theem hu ua gamma ob yam prime (ni₃nb). Cov theem no yog qhov ua tau zoo ntawm pining dislocations nyob rau hauv tus qauv crystal, ua rau nws cov txiaj ntsig zoo tshaj plaws thiab tensile lub zog. Cov qeeb tsim kev tsim kho Kinetics ntawm cov theem no yog tus yuam sij rau inconel 718 zoo heev weldability tsis muaj kev sib tsoo uas lwm lub siab- lub zog superalloys.
Kev sib xyaw: Cov ntsiab lus Nickel siab (50-55%) muab cov Austenicial Ausenitic Matrix thiab xam tawm tsam chloride kev ntxhov siab corrosion thiab txo cov cua. Chromium (17-21%) tso rau cov neeg ua kom muaj oxidation thiab sulfidation tsis kam. Niobium (NB) yog qhov tseem ceeb tshaj plaws rau '' tsim, thaum Molybdenum muaj zog txhawb nqa cov tshuaj muaj zog ntxiv thiab txhim kho pittings.
Kev kho cua sov: lub voj voog bar yog feem ntau muab rau hauv kev daws anealed mob (muag rau machining) thiab yog tom qab {{0} {{tawv. Cov qauv kev laus kev kho mob (laus nyob rau 720℃rau 8 teev, ua kom muaj zog, hloov lub bar rau hauv cov khoom siv siab.
Qhov kev sib xyaw ua ke no tso rau cov chaw tsim khoom siv los tshuab cov khoom siv nyuaj uas, tom qab kev kho cua sov, yuav ua kom muaj kev ntxhov siab rau hauv ib puag ncig loj.
2. Rau qhov khoom tseem ceeb ntawm ntau yam kev lag luam yog inconel 718 puag ncig bar cov khoom siv rawer zoo?
Inconel 718 puag ncig bar yog teev rau cov khoom uas tsis ua hauj lwm. Nws siv yog tsav los ntawm cov cai rau lub zog, nkees tsis kam, thiab kev ntseeg tau nyob hauv cov xwm txheej huab.
Aerospace thiab dav hlau siv: Qhov no yog thawj daim ntawv thov. Cov kab ke sib txuas yog tshuab ua cov khoom tseem ceeb xws li turbine hniav, disks, shakeners, rollees, bolts, thiab nplhaib. Cov ntu no yuav tsum tiv thaiv lub zog loj heev hauv Centrifugal, kev kub siab, thiab kev co kom zoo nkauj.
Roj & Roj (Sour Service): Tseem ceeb rau cov cuab yeej downhole, valve ntoo, thiab siab {{} lub zog bolting. Nws cov tsis sib xws los ua kom sulfide kev ntxhov siab tawg (SSC) rau ib puag ncig ua rau nws xaiv cov pa roj suraction.
Lub zog loj: siv rau cov roj turbine li, discs, rotors, rotors, thiab fasteners nyob rau hauv av - ua haujlwm turbines. Kuj siv nyob rau hauv nuclear reactors rau cov khoom tseem ceeb vim nws qhov kev ua tau zoo hauv high- kub dej.
Tshuaj lom neeg: machined rau hauv lub twj tso kua mis, valve kev xav tau, thiab reactor interlals uas yuav tsum muaj lub zog loj txuas nrog ntau yam tshuaj lom neeg.
High - Performance Automotive Carotive, Li Lwm Yam, Thiab Lwm Yam Kev Nyuaj Siab, Siab}}-}}} qhov chaw dej khov.
Qhov chaw sib tw ua yog qhov zoo tagnrho rau cov ntawv thov no vim tias nws tuaj yeem muab rau hauv kev sib hloov duab zoo ib yam nrog cov khoom siv zoo ib yam thoob plaws.
3. Dab tsi yog qhov kev kho cua sov sib txawv uas cov kev kho mob 718 puag ncig yog muab khoom, thiab lawv cuam tshuam li cas thiab cov khoom kawg li cas?
Cov kev kho cua sov ntawm kev hloov pauv thaum yuav khoom yog qhov kev txiav txim siab tseem ceeb uas cuam tshuam kev ua haujlwm, tus nqi, thiab ib feem ntawm kev ua haujlwm, thiab ib feem ntawm cov khoom siv ua haujlwm.
Daws annealed mob (ONS 5662): Qhov no yog cov khoom siv uas tseem ceeb tshaj plaws rau puag ncig rau machining.
Txheej txheem: rhuab rau 1700-1800℃f (927-982 degree) thiab txias txias.
Qhov tshwm sim: Ib qho muag muag, ductile micrubtructure nrog alloying ntsiab hauv cov teeb meem. Cov khoom muaj qhov hnyav dua (feem ntau ~ HB 300).
Feem: Zoo Saib Rau Machining. Nws yog qhov yooj yim rau tshuab, zom, thiab ua haujlwm txias hauv lub xeev no. Nws tsim tawm cov cuab yeej ntev dua, zoo dua saum npoo av, thiab tso cai rau cov khoom tsis sib haum ntau dua. Tom qab machining, cov sib xyaw ua ke yog raug rau kev ua haujlwm kev laus tag nrho kom ua tiav nws lub zog kawg.
Siv annealed thiab muaj hnub nyoog muaj hnub nyoog (Ams 5662): Tus bar tau muab rau hauv nws cov cua sov {} {{2} {4} lub zog ntawm lub xeev.
Qhov tshwm sim: cov khoom siv tau ntawm nws tag nrho hardness (ntau dua los yog sib npaug ntawm HRC 40) thiab lub zog (tawm los ntawm ntau dua lossis sib npaug nrog 150 ksi / 1034 MPA).
Cuam tshuam: tsis yooj yim rau tshuab. Machining hauv tus mob no yog qhov ua tau tab sis nyuaj. Nws yuav tsum tau muab cov cuab yeej siv tawv heev (carbide lossis tej hub), maj nrawm, thiab lub teeb. Nws yog feem ntau tsuas yog ua rau kev ua tiav me me. Tus mob no yog xaiv rau cov geometries yooj yim lossis thaum post {{}} tshuab kho cua sov yog impractical.
Annealed thiab ncaj ncaj: rau cov khoom uas yuav tsum tau tseem ncaj tom qab kub ua haujlwm, lawv feem ntau analaled los daws kev ntxhov siab thiab tiv thaiv kev tawg.
Qhov kev xaiv yog kev ua lag luam - tawm: machining nyob rau hauv lub peev xwm zoo dua, tab sis xav tau cov neeg lag luam muaj cov kev laus tom ntej kev kho mob.
4. Dab tsi yog qhov kev sib tw tseem ceeb thiab cov kev coj ua zoo tshaj plaws hauv machining Inconel 718 puag ncig bar, tshwj xeeb hauv kev tsis paub tab?
Machining Inconel 718, txawm tias nyob rau hauv nws "softer" anealed nyuaj vim nws lub zog siab, ua haujlwm} kev ua haujlwm hnyav, thiab kev ua kom tiav.
Cov nyom:
Ua haujlwm hnyav: cov khoom siv sai sai - Hardens thaum lub sijhawm txiav, ua rau thaj chaw tsuas yog txiav kom nyuaj dua li cov khoom siv ua hauv paus. Qhov no ua rau cov cuab yeej siv sai sai thiab tuaj yeem ua rau cov npoo tsis zoo yog tias cov cuab yeej tsis ntse.
Siab txiav: Nws lub zog siab yuav tsum siv tshuab cov cuab yeej siv hluav taws xob thiab txhim kho kom tsis txhob muaj kev sib tham thiab deflection.
Cov kev hnav muaj abrasive: cov carbides tawv nyob rau hauv lub micructure nyob rau hauv lub microstructure yog cov abrasive heev, ua rau ailming hnav thiab frank hnav rau tej cov cuab yeej.
Cov cua kub heev: Cov cua kub tseem ceeb yog tsim ntawm kev txiav ntug, uas tuaj yeem ua cov cuab yeej tsis ua ntej.
Cov kev coj ua zoo tshaj plaws:
Tooling: Siv cov ntse, muaj lub ntsej muag zoo li lub ntsej muag carride nrog cov txheej txheem tshwj xeeb (piv txwv li, pvd altin). Ceramic lossis CBN cov cuab yeej yog siv rau high - nrawm xov.
Cov tsis muaj: Siv qis rau kev txiav khiav ceev thiab qib siab. Lub siab pub ua kom ntseeg tau qhov kev txiav yog ua hauv qab ua haujlwm - Hardened txheej los ntawm cov dhau los. Tsis txhob cia cov cuab yeej nyob hauv kev txiav.
Coolant: Siv siab - h siab, siab-} pa tawg, thiab ntxuav cov chips kom tiv thaiv recutting.
Rigidity: xyuas kom lub workpiece, cov cuab yeej siv hlau, thiab tshuab yog tsis tshua muaj neeg tawv los tawm tsam qhov siab txiav.
5. Yuav ua li cas kev ua yeeb yam ntawm Inconel 718 puag ncig ntawm kev sib piv rau lwm qhov siab- lub zog bar piv zoo li ti-6al-4V lossis 17-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4
Kev xaiv yog nyob ntawm tus thawj tsav tsheb: lub zog tshwj xeeb, corrosion tsis kam, lossis muaj peev xwm kub.
Vs. Titanium alloy ti - 6 teev {}} 40): TiCE} 410) Txawm li cas los xij, inconel 718 vasterly outperforms titanium hauv peb qhov tseem ceeb:
Qhov kub thiab txias: Titanium poob ntau dua 400℃(750℃f) thiab yog tus ua rau piolen emeeslement. 718}} kev ua tau zoo txog 700 degree.
Corrosion Kuj: 718 muaj ntau cov xeb dav dav, tshwj xeeb tshaj yog hauv oxidizing thiab qaub ib puag ncig.
Hnav thiab galling: 718 tau zoo dua qub ua tsis kam thiab yog tsawg dua mus rau galling.
Vs . 17-4 Phos hlau stainless: 17 {{{}}}}}}}}}}} ishipitation stainless hlau uas yooj yim rau tshuab thiab tsis tshua kim.
Lub zog thiab ntsuas kub: hnub nyoog 718 tau ntxig ob npaug rau cov txiaj ntsig ib lub zog ntawm 17-4PH thiab khaws lub zog no rau ntau qhov kub ntau dua.
Corrosion Kuj: 718 Muaj Finonor RefinTorinity zoo tshaj rau pitting, corrosion corrosion, thiab chloride scc, ua rau nws yuav tsum tau siv rau sab nrauv thiab cov ntawv thov kev pabcuam.
Hauv cov ntsiab lus, Inconel 718 puag ncig kev xav tau lub zog ntau tshaj plaws, thiab / lossis loj dua rau nws cov nqi ntau dua thiab machining cov nyom ntau dua.
