Dab tsi yog siab temp alloys?
High-kub alloy yog ib qho alloy raws li hlau, npib tsib xee thiab cobalt cov ntsiab. Nws yog cov khoom siv hlau uas tuaj yeem ua haujlwm ntev ntev ntawm qhov kub siab dua 600 degree thiab nyob rau hauv qee yam kev ntxhov siab; Nws muaj cov khoom siv zoo xws li lub zog kub, oxidation tsis kam, qaug zog tsis muaj zog, kev ua kom muaj zog thiab kev ntseeg tau ntawm ntau qhov kub. Raws li cov kev ua tau zoo saum toj no thiab cov ntsiab lus siab, nws tseem hu ua "high-high-kub alloy". Nws yog dav siv nyob rau hauv aviation, aerospace, roj av, kev lag luam tshuaj thiab lwm daim teb, thiab yog cov khoom tseem ceeb rau cov nkoj.
Kev faib tawm high-kub alloys
Hom Hom, Alloy Dag Zog Hom, Cov Qauv Tsim.
Raws li cov ntawv sib dhos, cov khoom siv kub siab tau muab faib ua hlau-raws li kev siv npib, thiab kev cobalt-raws li kev kub siab. Kev ua haujlwm ntawm cov hlau-raws li cov high-kub alloys tuaj yeem tsuas yog ncav cuag 750 ~ 780 degree. Txog kev tiv thaiv tshav kub siv tau siv ntau dua li kub thiab txias dua, npib tsib xee thiab refractory alloys tau siv. Nickel-based high-kub alloys nyob ib txoj haujlwm tseem ceeb nyob rau hauv tag nrho cov chaw kub thiab yog cov kub tshaj plaws ntawm ntau qhov chaw muaj roj av tshuab.
Kev faib tawm los ntawm Matrix El Hom
▪ Fe-ni-CR / FE-FE-CR-MN SIAB KUB HEEV ALLOY
Hlau-based tshuab cua sov kuj tseem tuaj yeem hu ua tshav kub-resistant alloy hlau, uas yog tsim los ntawm kev ntxiv ib qho me me ntawm cov alloy ntawm alloying cov khoom xws li ni thiab cr kom lom zem. Tshav kub-resist alloy steel tuaj yeem faib ua martensitic, ustenitic, pearlitic thiab ferritic tshav kub-resistant steel raws li nws cov kev xav tau.
▪ Xee qab-raws li cov tshuab ntsuas kub siab
Nickel-based kub alloy muaj cov ntsiab lus npib tsib xee ntawm 50% lossis ntau dua, thiab cov kev kho kom zoo dua los ntawm cov kev daws teeb meem thiab kev laus. Tam sim no, daim ntawv thov ntau ntawm cov nickel-raws li kev kub siab ntau dua li ntawm cov hlau-based thiab kev kub raws li kev kub siab. Ntau lub cav tshuab turbine, txawm tias lub tshuab cua tshuab thiab cov chav lim dej ntawm Turbochargers yog ua los ntawm cov neeg npib tsib xee.
▪ Cobalt-based tshuab siab kub alloy
Qhov muaj pes tsawg leeg ntawm kev cobalt-based kev kub siab yog li 60%, thiab ntxiv rau ntawm cov ntsiab xws li CR thiab NI tuaj yeem txhim kho. Txawm hais tias hom kev kub siab no muaj cov cua sov tsis kam, cov txiaj ntsig ntawm kev cobalt yog qhov tsawg thiab kev ua yog qhov nyuaj. Feem ntau nws yog siv los tsim cov khoom uas muaj qhov kub (600 ~ 1000 degrees, kev nyuaj siab disks, combusion cov pob zeb thiab kub kawg ntawm cov cav dav hlau. Txhawm rau kom tau txais tshav kub ua kom zoo dua, cov ntsiab xws li W, Mo, thiab feem ntau ntxiv rau thaum lub sijhawm npaj ua kom nruj thiab qaug zog.
Kev faib tawm los ntawm Alloy Ntxiv Hom
Raws li cov allots ntxiv dag zog hom, kev kub siab alloys tuaj yeem faib ua cov khoom siv kub ntau ntxiv ua ke muaj kev kub ntxhov.
▪ Cov Khoom Siv Daws ntxiv dag zog siab Alloy
Cov tshuaj kho zog ntxiv dag zog tag nrho alloy yog hais txog qhov sib ntxiv ntawm qee qhov kev siv kub ua ke los tsim ib qho-theem Austenite qauv. Lub solution atoms distort cov khoom daws teeb meem matrix lattice, nce cov khaub ncaws tsis kam nyob rau hauv cov kev daws teeb meem, thiab ntxiv dag zog rau nws. Qee yam solution atoms tuaj yeem txo cov txheej txheem delamination ntawm cov txheej txheem alloy, nce kev txiav txim siab nyiam ntawm kev tsis sib haum xeeb, thiab ua rau sab nraud ntawm qhov nyuaj.
▪ Sawv Cev Zes Dag Zaus Kub Alloy
Qhov thiaj li hu ua kev laus dag zog los ntawm kev kho mob kub thiab tom qab ntawd cov kev ua haujlwm yooj yim los tswj nws qhov kev ua tau zoo ntawm qhov kub siab dua lossis txias. Piv txwv li, qhov siab tshaj plaws tau muaj zog lub zog ntawm inconel 718 alloy ntawm 650 degree} mpa, thiab cov alloy tuaj yeem npaj ntawm 950 degree.
Kev faib tawm los ntawm cov khoom tsim qauv
Raws li cov ntaub ntawv tsim qauv, nws tau muab faib ua cam high-requal mowots, thiab cov hmoov tsis zoo li cas ntawm cov hmoov av, thiab cov tshuaj lom neeg ntau dua qub
Nrog nws cov kev ua tau zoo heev, muaj kev kub siab ntau siv nyob rau hauv lub teb ntawm Aerospace thiab lub zog, thiab nws cov peev txheej siv rau 40% ~ 60% ntawm lub cav tag nrho. Noj inconal 718 Alloy ua piv txwv, nws yog cov dav siv ntau xws li bolts, compressors, impellers thiab roj npog ntawm Turbooshaul
. Ib qho ntxiv, nws kuj yog siv rau cov teeb meem, cov nplhaib, cov npe thiab cov nozzles. Lub superheaters thiab reseaters ntawm high-traperical elev boilers ntawm Coal-rollow fais fab tsis kam thiab zoo heev corrosion. Turbine yas thiab coj cov roj teeb hluav taws xob-tua hluav taws xob nroj tsuag, nuclear fais tshav kub yeeb nkab dej chav taws, thiab lwm yam.
