Koj puas paub cov khoom siv alloy inconel706 yog dab tsi?
Inconel 706 (abbreviated li IN 706) yog cov nag lossis daus-lub zog Ni-Fe-Cr raws li alloy. Nws muaj cov yam ntxwv ntawm cov tshuaj tsim nyog, ob peb metallurgical tsis xws luag, tsis tshua muaj kev sib cais, kev ua haujlwm zoo, thiab tus nqi qis. Yog li ntawd, nws tuaj yeem siv los tsim cov khoom loj loj thiab ultra-loj-loj-kub siab alloy khoom kom tau raws li qhov xav tau ntawm kev lag luam hnyav. Tsis tas li ntawd, cov alloy muaj lub zog siab ntawm 700 degree thiab zoo tiv thaiv oxidation thiab corrosion nyob rau hauv ib tug dav kub thiab nruab nrab ntau yam, yog li nws muaj zoo heev technical thiab economic tseem ceeb.
Nrog rau txoj kev loj hlob sai ntawm cov cav turbine, roj turbines thiab kev lag luam nuclear, cov khoom lag luam loj loj-kub kub tau nce ntxiv. Qhov no tau ua rau ob qho teeb meem, ib qho yog cov khoom sib cais ntawm cov khoom loj loj thiab kev tswj hwm ntawm ntau yam kev tsis xws li metallurgical, thiab lwm yam yog nws cov txheej txheem thiab kev tsim tshuab. Nws yog ib qho nyuaj rau yav dhau los npib tsib xee-raws li high-temperature alloys xws li IN 718 kom tau raws li qhov yuav tsum tau ua. Yog li ntawd, nyob rau xyoo 1970, ib hom tshiab ntawm Ni-Fe-based high-temperature alloy IN 706 tau tsim los ntawm American International Nickel Company. Nws cov khoom siv lub cev yooj yim tau teev nyob rau hauv Table 1. Cov alloy no suav tias yog ib qho ntawm cov khoom lag luam zoo tshaj plaws nyob rau hauv cov khoom siv kub kub rau kev lag luam hnyav. Vim li no, lub rooj sib tham thoob ntiaj teb ntawm cov hlau no tau muaj nyob hauv Tebchaws Meskas hauv xyoo 1994. Nws tuaj yeem pom tau tias qhov kev nce qib tshiab hauv kev tshawb fawb ntawm nws tab tom ua haujlwm zoo. Txawm li cas los xij, cov khoom siv tam sim no tsis tshua muaj kev kawm hauv Suav teb. Tsab ntawv xov xwm no tshuaj xyuas qhov kev tshawb fawb zaum kawg ntawm no alloy txawv teb chaws.
2. Kev sib xyaw thiab theem kev hloov pauv ntawm cov alloys
Cov muaj pes tsawg leeg ntawm no alloy tau hloov me ntsis txij li thaum nws tsim nyob rau hauv lub xyoo 1970s, thiab Table 2 muab tus qauv muaj pes tsawg leeg ntau yam rau no alloy. Yog vim li cas vim li cas IN 706 alloy yog nyiam los ntawm tib neeg yog tias nws muaj cov khoom siv hlau zoo thiab kev ua haujlwm, uas yog ncaj qha sib cais los ntawm cov muaj pes tsawg leeg. Piv nrog rau IN 718 alloy, nws cov ntsiab lus Nb thiab Ni raug txo. Lub ntsiab Mo raug tshem tawm thiab cov ntsiab lus Ti tau nce. Tag nrho cov kev hloov pauv no cuam tshuam ncaj qha rau metallurgy, kev ua haujlwm thiab cov khoom siv hluav taws xob ntawm cov hlau. Vim li no, cov alloy muaj pes tsawg leeg yuav tsum tau kawm.
Nb thiab Ti ntsiab: Lawv yog lub hauv paus txhawb zog theem tsim cov ntsiab lus hauv Taijin thiab ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov hlau. Kev ntsuam xyuas tau ua pov thawj tias (Ti + Nb) cov ntsiab lus thiab Ti / Nb piv yuav tsum tau tswj kom raug. Thaum tag nrho cov nyiaj ntawm (Ti + Nb) nce los ntawm 3.99% mus rau 4.77wt%, alloy hardness thiab lub zog nce, thiab durability thiab tawg toughness kuj nce. Txawm li cas los xij, thaum tag nrho cov nyiaj ntawm (Ti + Nb) tshaj 4.81%, chav tsev kub plasticity txo qis. Lub pob txha ruaj khov kuj txo qis vim tias Ti / Nb piv yog me me, uas cuam tshuam rau cov duab, qhov loj me thiab kev faib tawm ntawm cov dej nag, yog li cuam tshuam rau kev ua haujlwm. Txog rau qhov kawg no, tag nrho cov nyiaj ntawm (Ti + Nb) yuav tsum tswj hwm ntawm thaj tsam 4.7%, thiab Ti / Nb piv yuav tsum nyob ib puag ncig 0.68, txhawm rau kom tau txais kev ua tau zoo tag nrho. Yog vim li cas vim li cas cov ntsiab lus Nb nyob rau hauv IN 706 alloy yuav tsum tau txo yog vim hais tias nws yog ib tug muaj zog point bias tsim lub caij. Qhov no yog raws li qhov tseeb tias qhov kev tsis ncaj ncees yog tshwm sim los ntawm Nb- thiab Mo-nplua nuj laves theem.
Al element: Nws yog ib qho ntawm cov ntsiab lus tseem ceeb ntawm Ni₃ (Al, Ti, Nb) theem (tseem hu ua 'theem). Hauv IN 706 alloy, cov ntsiab lus Al raug txo los ntawm kwv yees li 0.2% piv nrog IN 718, thiab nws lub hom phiaj yog txhawm rau txhim kho kev ua haujlwm ntawm machining thiab vuam kev ua tau zoo. Qhov txo qis hauv Al cov ntsiab lus ua rau muaj kev hloov pauv hauv lub koom haum ntawm Y theem thaum muaj kev kho cua sov sib txawv. Piv txwv li, thaum cov ntsiab lus Al tsawg dua {{10}}.2%, thaum lub alloy nyob rau hauv ib tug me ntsis hnub nyoog, tus qauv Y yog lub cev-centered square, feem ntau sawv cev los ntawm Y". cuam tshuam rau dislocations muaj zog tshaj lub ntsej muag-centered cubic Y theem, thiab qhov loj ntawm qhov tseem ceeb particle thaum nag lossis daus yog me me, yog li lub chav tsev kub lub zog yog siab. Raws li cov ntsiab lus Al nyob rau hauv lub alloy nce, lub ntsej muag-centered cubic Y qauv. ua lub ntsiab qauv ntawm precipitated theem, nyob rau hauv cov ntaub ntawv no, lub lattice tas li ntawm Y thiab lub kaw-packing Thaum cov qauv hloov, qhov tseem ceeb loj ntawm precipitated hais, uas yuav txo tau cov hindrance rau dislocation txav thiab txo lub zog. tau ua pov thawj tias Al ntsiab lus nyob rau hauv thaj tsam ntawm 0.2 txog 0.4% yog haum rau IN 706 alloy.
Si element: Nws ncaj qha cuam tshuam rau theem laves. Cov ntsiab lus Si muab rau hauv tus qauv yog qis dua {{0}}.35wt%, tab sis nyob rau ntawm qhov txwv siab tshaj ntawm qhov no, ib theem laves yuav raug tsim. Nyob rau lub sijhawm no, lub network ntawm laves theem feem ntau yog tsim nyob rau ntawm cov ciam teb nplej, ua rau Charpy cuam tshuam toughness yog txo qis heev. Vim li no, Si cov ntsiab lus yuav tsum tau tswj qis dua 0.1%, uas yuav tiv thaiv kev tsim ntawm laves theem.
C element: Cov ntsiab lus ntawm C lub ntsiab lus cuam tshuam rau qhov toughness thiab kev ua haujlwm ntawm cov khoom. Kev ntsuam xyuas tau pom tias thaum C cov ntsiab lus txo qis los ntawm {{0}}.03% mus rau 0.01wt%, Charpy cuam tshuam tus nqi toughness yuav nce [1]. Txo cov ntsiab lus C kuj txhim kho cov txheej txheem los ntawm kev txo cov carbide tsim.
O thiab N cov ntsiab lus: Lawv cuam tshuam ncaj qha rau kev tsim cov pob dawb hauv cov hlau, vim tias cov pob dawb yog depleted thaj chaw ntawm Nb thiab Ti, thiab cov cheeb tsam no yeej ib txwm muaj ntau cov ntsiab lus O thiab N. Kev ntsuam xyuas tau ua pov thawj tias txo O thiab N cov ntsiab lus yuav txo qhov tsim ntawm cov pob dawb, yog li txhim kho kev ua haujlwm qis qis qis. Tsis tas li ntawd, txo O thiab N cov ntsiab lus tseem yuav txwv kev tsim cov oxide thiab nitride impurity pawg. Txhawm rau txo cov teebmeem no, nws cov ntsiab lus yuav tsum tsawg dua 50wt ppm.
Rau IN 706 alloy, nws lub ntsiab nag lossis daus theem tau teev nyob rau hauv Table 3. Lawv qhov kev hloov pauv kub-lub sij hawm-hloov tus nqi kev sib raug zoo nkhaus yog qhia hauv daim duab 1. Cov nag lossis daus kab ntawm MC muaj feem xyuam rau cov txheej txheem annealing ntawm cov khoom.
