Lub cev tsis xws luag hauv kev tsim cov titanium alloy forgings
Lub cev tsis xws luag hauv kev tsim cov titanium alloy forgings
1. Qhov kev cais hom tsis meej
Ntxiv rau greg cais, β chaw, titanium-nplua nuj kev sib cais thiab cov kab txaij greg sib cais, qhov txaus ntshai tshaj plaws yog interstitial α segregation ruaj khov (hom I α cais cais), uas feem ntau nrog cov qhov me me thiab cov kab nrib pleb, muaj cov pa oxygen, nitrogen thiab lwm yam gases , Lub brittleness ntau dua. Kuj tseem muaj al-alpha ruaj khov cais sib cais (hom II alpha segregation), uas tseem ua rau muaj qhov tsis zoo txaus ntshai vim cov kab nrib pleb thiab nkig, thiab kuj tseem txo qhov thermal stability ntawm cov alloy.
2. Kev suav
Muaj cov kab ke nyob rau saum npoo ntawm qhov khoob, thiab cov kab nrib pleb feem ntau tsim nrog cov sib xyaw thaum lub sijhawm forging, lossis pom lub cev txawv teb chaws tshwm sim tom qab lub forging yog corroded, feem ntau yog cov hlau suav nrog lub siab melting thiab qhov ntom ntom. Nws yog tsim los ntawm qhov tsis txaus melting ntawm lub siab melting qhov taw tes thiab lub siab ntom ntom khoom hauv titanium alloy muaj pes tsawg leeg kom nyob twj ywm hauv cov lej (xws li molybdenum suav nrog), thiab tseem muaj cov cuab yeej carbide chippings sib xyaw hauv smelting raw cov ntaub ntawv (tshwj xeeb yog cov khoom siv rov qab) lossis tsis raug cov txheej txheem electrode vuam (Titanium alloy smelting feem ntau siv lub tshuab nqus hluav taws xob electrode remelting txoj kev [ii]), xws li cov khoom siv hluav taws xob ntau sab laug los ntawm tungsten arc vuam [iii], xws li suav nrog rau hauv tungsten, ntxiv rau titanium suav, thiab lwm yam. nrog rau kev suav nrog tsis tso cai muab tso rau siv.
3. Qhov
Lub qhov tsis tas yuav muaj nyob ntawm tus kheej, tab sis kuj yuav muaj nyob rau hauv ntau qhov ntom ntom, uas yuav ua kom nrawm nrawm nrawm nrawm qis dhau los ua kom lub cev thiab ua rau lub cev tsis ua hauj lwm zoo ua ntej.
4. Nrib pleb
Feem ntau yog hais txog forging tawg. Titanium alloys muaj siab viscosity, tsis hais kev tsis haum, thiab cov thermal conductivity tsis zoo. Yog li ntawd, thaum lub sijhawm forging deformation txheej txheem, vim yog qhov loj loj txhuam, qhov tsis sib xws sab hauv deformation thiab qhov kub loj sib txawv ntawm sab hauv thiab sab nraud, nws yooj yim sab hauv lub forging. Cov xov txiav (cov kab ua haujlwm) tau tsim tawm, thiab cov kab nrib pleb tshwm sim raws cov lus taw qhia ntawm qhov siab tshaj plaws deformation kev nyuab siab hauv cov xwm txheej hnyav.
5. Kev tswjhwm ntau
Titanium alloys muaj cov thermal ua tsis zoo. Ntxiv nrog rau qhov overheating ntawm qhov tsis nco qab lossis cov ntaub ntawv nyoos tshwm sim los ntawm kev ua tsis muaj cua sov thaum lub sijhawm ua haujlwm kub, cov txheej txheem forging tseem muaj qhov kub nyhiab vim yog cov cua sov thaum lub sijhawm deformation, ua rau microstructure hloov, uas ua rau Widhestatten tus qauv [iv].
Txhawm rau kom ntseeg tau qhov zoo ntawm titanium alloy tsis nco qab, ntxiv rau kev tswj hwm nruj ntawm cov khoom nyoos, kev saib xyuas kuj yuav tsum tau them rau ultrasonic qhov khuam pom ntawm lub forging blanks thiab cov khoom tiav ib nrab kom tiv thaiv qee qhov deformation thiab cov yam ntxwv ntawm lub cev uas yuav hloov thaum txheej txheem cua kub tom ntej.
