Yuav ua li cas kom ua tiav superplasticity ntawm titanium alloy?

Superplasticity tau dhau los ua ib qho tseem ceeb ntawm cov khoom siv uas yuav tsum tau tsim los ua cov duab nyuaj lossis siv rau hauv cov khoom siv high-precision. Titanium alloys, paub txog lawv lub zog siab, lub teeb yuag thiab corrosion kuj, kuj tau pom tias muaj superplasticity nyob rau hauv qee yam mob. Txawm li cas los xij, qhov txwv elongation thiab strain rate rhiab heev ntawm titanium alloys ua rau nws nyuaj kom ua tiav kev txhim khu kev qha superplastic deformation. Hmoov zoo, qhov kev txhim kho thev naus laus zis tshiab tau txhim kho cov superplasticity ntawm titanium alloys thiab nthuav dav lawv cov ntawv thov hauv ntau qhov kev lag luam. Lub superplasticity ntawm titanium alloy txhais tau hais tias nyob rau hauv lub kub kub thiab siab strain tus nqi tej yam kev mob, cov khoom yuav undergo loj deformation tsis tawg. Kev ua tiav superplasticity hauv titanium alloys feem ntau suav nrog kev ua cov thermomechanical thiab superplastic txoj kev tsim. Cov hauv qab no yog qee cov txheej txheem uas tau siv los txhim kho lub peev xwm ntawm superplastic deformation ntawm titanium alloys:

Los ntawm kev txo qhov loj ntawm titanium alloy nplej, cov khoom siv kho tshuab, suav nrog superplasticity, tuaj yeem txhim kho tau zoo. Ib txoj hauv kev kom ua tiav cov nplej zom yog siv cov yas deformation hnyav (SPD) xws li vaj huam sib luag channel angular extrusion (ECAP) lossis siab torsion (HPT). Cov txheej txheem no ua rau muaj qhov loj ntawm shear strain, ua rau cov khoom tawg mus rau qhov me me. Grain refinement tuaj yeem ua tiav los ntawm kev tswj cov kev kho cua sov ntawm cov hlau. Cov nplej me me ua rau cov khoom siv zog thiab plasticity.
Cov txheej txheem zoo tshaj plaws xws li kev sib tsoo-ntawm-kev sib tsoo (COLA) tuaj yeem siv los npaj superplastic titanium alloys.

Lwm txoj hauv kev los txhim kho lub superplasticity ntawm titanium alloys yog los ntawm kev siv cov txheej txheem thermomechanical. Piv txwv li, cov txheej txheem forging tuaj yeem ua kom zoo dua cov nplej loj thiab txhim kho qhov kev ntxhib los mos ntawm cov khoom, ua rau zoo dua superplasticity. Tsis tas li ntawd, superplasticity ntawm titanium alloys kuj tuaj yeem txhim kho los ntawm kev kho cua sov xws li kev laus thiab kev sib tsoo.
Kev kho cua sov: Lub plasticity ntawm titanium alloys tuaj yeem txhim kho los ntawm kev ua cov tshuaj kho thiab kev laus kev kho mob ntawm qhov kub thiab txias. Cov tshuaj kho mob pab txhim kho qhov sib xws ntawm cov hlau, thaum kev laus kev kho mob pab ua kom muaj zog.
Thermomechanical forming: Los ntawm kev ua cov txheej txheem thermomechanical xws li ncab, extrusion los yog forging ntawm qhov kub thiab txias, cov qauv kev hloov pauv xws li cov nplej refinement thiab tsim tuaj yeem qhia los txhim kho superplasticity.

Superplastic forming (SPF) yog cov txheej txheem tsim khoom siab heev uas siv cov khoom siv superplastic deformation los tsim cov khoom sib xws. Cov txheej txheem suav nrog cua kub ntawm titanium alloy mus rau qhov kub thiab txias uas nws nthuav tawm superplastic tus cwj pwm thiab tom qab ntawd siv cua siab los tsim cov khoom siv rau hauv cov duab uas xav tau. SPF yog ib qho kev daws teeb meem zoo rau kev tsim cov khoom zoo thiab cov khoom sib txuam uas tsis tuaj yeem tsim los siv cov txheej txheem ib txwm muaj.
Isothermal forming: Isothermal forming yog isothermal stretching, extrusion los yog twisting ntawm titanium alloy ntawm kub kub kom ua tau superplastic deformation. Cov thev naus laus zis tshiab tau ua tiav qib siab dua ntawm cov yas deformation los ntawm kev ua kom zoo dua cov txheej txheem isothermal thiab nthuav dav daim ntawv thov teb ntawm titanium alloys.
Kub tuag forging: Siv cov txheej txheem tshwj xeeb ntawm kev kub siab, xws li kub tuag forging, tuaj yeem ua tiav loj deformations ntawm titanium alloys.
Kub expansion forming: Thaum kub kub, titanium alloys yog kub-expanded los ntawm cov pa hnab los yog hydraulic systems los tsim complex Cheebtsam.

Los ntawm kev tsim cov tshuaj lom neeg muaj pes tsawg leeg ntawm titanium alloys, cov kws tshawb fawb tuaj yeem kho cov ntsiab lus hauv cov hlau kom ua tiav kev tswj hwm ntawm superplasticity. Cov thev naus laus zis tshiab no ua rau muaj kev hloov pauv tshiab hauv kev tsim cov alloy los ntawm kev sib xyaw ua ke ntawm lub computer simulation thiab kev sim tshuaj xyuas.
Los ntawm kev tsim cov tshuaj lom neeg muaj pes tsawg leeg ntawm titanium alloys, cov ntsiab lus tseem ceeb hauv cov hlau tuaj yeem hloov kho los txhim kho nws cov superplasticity. Ntxiv cov kab ntawm cov ntsiab lus alloying, xws li hlau, txhuas, boron, thiab lwm yam, tuaj yeem txhim kho lub superplasticity ntawm titanium alloys.
Feem ntau hais lus, kev tshawb fawb ntawm superplastic titanium alloys koom nrog ntau yam, suav nrog kev tswj hwm ntawm cov khoom siv thiab cov khoom, kev ua kom zoo ntawm cov txheej txheem thermomechanical, thiab kev siv cov txheej txheem tshiab superplastic forming technologies. Nrog rau txoj kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis, cov txheej txheem tshiab thiab cov thev naus laus zis niaj hnub tau npaj los txhim kho cov superplastic deformation peev xwm ntawm titanium alloys. Cov thev naus laus zis tshiab no ua rau nws tuaj yeem txhim kho lub peev xwm superplastic deformation ntawm titanium alloys, yog li nthuav dav lawv cov ntawv thov hauv ntau qhov kev lag luam. Los ntawm daim ntawv thov ntawm grain refinement, thermomechanical ua thiab superplastic txoj kev, titanium alloys yuav siv tau los tsim high-zoo complex qhov chaw nrog zoo heev mechanical zog.