Titanium qws yas ua
Plastic processing metallurgy yog kev kawm txog kev txav ntawm cov hlau siv lead ua cov qauv. Nws yog qhov yooj yim txoj kev xav rau kev tswj thiab txhim kho thermodynamic thiab mechanical tej yam kev mob nyob rau hauv thiaj li yuav ua tau cov yas zoo tshaj plaws txoj kev. Nws yog tsim los ntawm kev qhia txog cov txiaj ntsig thiab kev ua tau zoo ntawm kev tsim cov yas kev lag luam xyoo dhau los. Nws txoj haujlwm tseem ceeb ntawm kev tshawb fawb yog tshawb nrhiav cov thermodynamic thiab cov khoom siv kho kom haum rau deformation ntawm cov hlau thiab lawv cov alloys, thiab nrhiav cov txheej txheem uas txhim kho deformation kev ua tau zoo, txo deformation kuj, tsis txhob muaj qhov tsis xws luag, thiab ua tiav qhov zoo tshaj plaws crystalline qauv hauv lub xeev thiab kev ua haujlwm tom qab deformation, txhawm rau kom tau txais Cov Khoom Siv nrog qhov zoo tshaj plaws sab hauv thiab sab nrauv zoo thiab ua tau raws li cov qauv kev txuag hluav taws xob. Nws cov ntsiab lus tshawb fawb tseem ceeb suav nrog: titanium rods
(1) Mechanism ntawm hlau yas deformation. Hlau yas ua yog tsim kom ruaj khov thiab tas mus li deformation ntawm cov hlau raug rau sab nraud quab yuam kom muab cov khoom xav tau thiab cov qauv. Nws yog ib qho tseem ceeb heev uas yuav tsum paub txog cov txheej txheem ntawm deformation thiab nws lub luag haujlwm hauv cov yas deformation, nws cov kev hloov pauv thiab nws cov txiaj ntsig. Raws li kev txais txiaj ntsig ntawm kev paub txog cov qauv siv lead ua nyob rau hauv cov khoom siv qhuab qhia, peb yuav nkag siab txog cov kev xav hauv pliaj thiab dislocation thiab tsim lub hauv paus rau kev nkag siab tob ntawm cov yas deformation.
(2) Hlau tawm los thiab deformation kuj. Hlau tuaj yeem hloov los ntawm elastic deformation mus rau yas deformation nyob rau hauv ib qho kev quab yuam sab nraud. Lub xeev no hu ua yielding. Tus nqi kev ntxhov siab thaum cov hlau yields sawv cev rau qhov kev ntxhov siab uas cov hlau tau pib ntws, yog li kev coj tus cwj pwm ntawm cov hlau polycrystals yuav tsum tau kawm. Polycrystals yog tsim los ntawm ntau cov khoom siv lead ua ib leeg nrog cov kev taw qhia sib txawv. Yog li ntawd, peb yuav tsum xub kawm ib co yielding cwj pwm ntawm ib tug crystals thiab qhia meej lawv lub hauv paus chiv keeb, yog li ntawd peb yuav tsum tau kom raug cov yas deformation ntawm hlau polycrystals. Yielding tsuas yog txhais tau hais tias cov hlau tau pib yas deformation, thaum S ntawm kev ua cov yas yog xav kom cov hlau deform mus rau qhov loj me me los hloov cov duab thiab qhov loj ntawm qhov qub, txhim kho cov khoom siv kho tshuab, thiab tau txais cov khoom tsim nyog. Lub zog siv sab nraud nce nrog qhov nce ntawm deformation. Txhawm rau ua tiav cov txiaj ntsig ntawm cov hlau thiab tswj kom ruaj khov tsis tu ncua deformation, nws yog ib qho tsim nyog yuav tsum kawm txog lub peev xwm ntawm cov hlau los tiv thaiv cov kev xav no nyob rau hauv ntau yam xwm txheej - qhov deformation tsis kam ntawm hlau.
(3) Thermodynamic tej yam kev mob rau hlau yas deformation. Hlau yuav tsum raug rau sab nraud quab yuam nyob rau hauv tej yam kev kho tshuab thiab thermodynamic tej yam kev mob nyob rau hauv thiaj li yuav undergo lub xav deformation. Thermodynamic tej yam kev mob muaj xws li kub, degree thiab tus nqi ntawm deformation, uas txwv tsis pub txoj kev vam meej los yog tsis ua hauj lwm ntawm yas deformation. Yog li ntawd, xaiv thiab txiav txim siab qhov kub thiab txias deformation ntau, deformation tus nqi thiab deformation ceev yog qhov yooj yim tshaj plaws kev paub rau kev hloov cov ntsiab lus ntawm cov qauv sab hauv ntawm hlau.
(4) Hlau yas deformation thiab kev hloov hauv lub koom haum cov khoom. Lub hom phiaj ntawm kev ua cov yas hlau yog tsim kom muaj kev pom zoo los txhawb qhov kev xav tau hloov pauv thiab cov qauv kev hloov pauv ntawm cov khoom ua haujlwm thaum lub sijhawm ua haujlwm deformation, thiab kom tau txais cov khoom zoo uas yuav tsum tau ua. Tsis ntev los no, nyob rau hauv tus txheej txheem ntawm kev tsim cov ntaub ntawv tshiab, cov khoom tsim los ntawm cov pa ntxiv cov txheej txheem yog qhov nyuaj rau kev ua tau raws li qhov yuav tsum tau ua vim cov qauv tsis zoo lossis cov khoom. Yog vim li cas yog qhov tsim ntawm deformation kev ntxhib los mos thiab recrystallization kev ntxhib los mos. Txhawm rau kom tswj tau qhov tsim thiab muaj nyob ntawm kev ntxhib los mos thiab txo cov kev tsis zoo, kev tshawb fawb ntawm cov txheej txheem annealing thiab recrystallization, qauv thiab lwm yam tshwj xeeb lub koom haum tsim mechanisms thiab tswj technologies yuav siv tau los npaj cov ntaub ntawv uas muaj cov ntaub ntawv tshwj xeeb raws li kev nkag siab txog lawv txoj cai. Cov khoom siv nrog cov kev xav tau ntawm kev ua haujlwm.
(5) Plasticity thiab tawg ntawm cov hlau. Cov hlau tuaj yeem ruaj khov rau cov yas deformation yam tsis muaj kev puas tsuaj, uas yog ib qho cim qhia tias cov hlau muaj plasticity. Kawm txog lub peev xwm ntawm cov hlau kom tiv taus cov yas deformation yam tsis muaj kev puas tsuaj nyob rau hauv qee yam kev mob, cov xwm txheej rau kev txhawb nqa hlau kom ncav cuag nws lub xeev zoo thiab txoj hauv kev los txhim kho nws cov plasticity. titanium hlau
(6) Tsis sib xws deformation thiab residual stress. Txhua yam txheej txheem yas deformation yog nyob rau hauv lub xeev tsis sib xws, yog li qhov tshwm sim thiab kev loj hlob ntawm deformation thiab qhov tshwm sim ntawm kev ntxhov siab, kev nyuaj siab thiab kev ua tau zoo yog tag nrho hauv lub xeev tsis sib xws. Yog li ntawd, nws yog ib qho tsim nyog los kawm txog cov laj thawj, qhov tsis zoo thiab kev tiv thaiv kev ntsuas ntawm qhov tshwm sim thiab nthuav dav ntawm qhov tsis sib xws ntawm deformation thiaj li ua tiav cov txheej txheem deformation zoo li ntau li ntau tau thaum lub sijhawm tsim khoom.
