Phase transformation yog qhov tseem ceeb rau kev kho cua sov ntawmtitanium alloys. Txhawm rau txhim kho lawv cov khoom, ntxiv rau kev sib xyaw kom zoo, kev kho cua sov tsim nyog yog tsim nyog. Muaj ntau ntau hom kev kho cua sov rau titanium alloys, feem ntau suav nrog annealing, kev laus kev kho mob, deformation tshav kub kho, thiab tshuaj kho cua sov.
Niaj hnub no, peb yuav ua tib zoo saib cov txheej txheem annealing rau titanium alloys:
Kev kho mob Annealing
Annealing yog haum rau ntau yam titanium alloys. Nws lub hom phiaj tseem ceeb yog txhawm rau txo kev ntxhov siab, txhim kho cov hlau ntawm plasticity, thiab ruaj khov nws cov microstructure. Annealing txoj kev muaj xws li kev ntxhov siab-relief annealing, recrystallization annealing, ob chav annealing, isothermal annealing, thiab nqus annealing.
Ordinary annealing muaj cua sov ntawm qhov kub ntawm 20℃mus rau 250℃hauv qab qhov kev hloov pauv kub ntawm cov hlau thiab tom qab ntawd cua txias lossis cua txias. Tag nrho annealing (recrystallization annealing) suav nrog cua sov thiab tuav ntawm qhov kub siab tshaj qhov kub ntawm recrystallization tab sis qis dua qhov kev hloov pauv kub, ua raws li cua txias lossis cua sov kom tau txais cov qauv recrystallized thiab txhim kho plasticity.
Ob chav annealing suav nrog cua sov thiab cua txias ntawm qhov kub ntawm 250℃txog 450℃hauv qab qhov kev hloov pauv kub ntawm cov hlau tom qab tag nrho annealing, ua raws li cua txias. Isothermal annealing muaj cua sov thiab tuav ntawm qhov kub ntawm 20℃mus rau 160℃hauv qab ntawm qhov kev hloov pauv ntawm cov hlau, tom qab ntawd hloov mus rau lub cub tawg ntawm qhov kub ntawm 350℃mus rau 450℃hauv qab qhov kev hloov pauv kub lossis qhov cub txias rau qhov ntsuas kub no thiab tuav ua ntej cua txias lossis cua txias. annealing yuav tsum annealing ntawm qhov tsim nyog kub saum toj no transformation kub ntawm alloy. Kev ntxhov siab nyem annealing txo cov kev ntxhov siab nyob hauv cov khoom tsis ua rau recrystallization ntawm cov qauv, yog li tshem tawm cov kev ntxhov siab hauv lub sijhawm ua haujlwm.
(1) Kev ntxhov siab -relief annealing. Kev ntxhov siab-relief annealing yog siv los tshem tawm cov kev ntxhov siab sab hauv tsim thaum lub sij hawm casting, txias deformation, thiab vuam. Qhov kub thiab txias yuav tsum qis dua qhov kub ntawm recrystallization, feem ntau 450 ~ 650 degree. Lub sijhawm yuav tsum tau nyob ntawm qhov chaw ua haujlwm tus ntoo khaub lig- ntu qhov ntev, ua keeb kwm, thiab qib kev ntxhov siab xav tau.
(2) Ordinary annealing. Nws lub hom phiaj yog txhawm rau tshem tawm cov kev ntxhov siab hauv titanium alloy semi- cov khoom tiav thiab kom ua tiav lub zog siab thiab plasticity raws li kev xav tau. Qhov kub annealing feem ntau sib npaug los yog qis dua qhov kub ntawm recrystallization pib. Cov txheej txheem annealing no feem ntau yog siv thaum cov khoom siv hlau tawm hauv lub hoobkas, yog li nws tuaj yeem hu ua Hoobkas annealing.
(3) Tag nrho annealing. Nws lub hom phiaj yog kom tshem tawm tag nrho kev ua hauj lwm hardening, stabilize lub microstructure, thiab txhim kho plasticity. Cov txheej txheem no feem ntau suav nrog recrystallization, yog li nws tseem hu ua recrystallization annealing. Qhov kub ntawm qhov annealing yog qhov zoo tshaj plaws ntawm qhov ntsuas kub ntawm recrystallization thiab theem transformation kub. Yog tias nws tshaj qhov kub hloov pauv theem, Widmanstätten qauv yuav tsim, deteriorating lub alloy lub zog. Hom, kub, thiab txias txoj kev ntawm annealing sib txawv rau ntau hom titanium alloys.
(4) Ob chav annealing. Ob chav annealing tuaj yeem siv los txhim kho cov yas, tawg toughness, thiab ruaj khov microstructure ntawm alloys. Lub annealed alloy microstructure yog ntau yam sib xws thiab ze rau qhov sib npaug. Hom annealing no feem ntau yog siv rau cov cua sov- tiv taus titanium alloys los xyuas kom meej qhov ruaj khov ntawm lawv cov microstructure thiab cov khoom nyob rau hauv qhov kub thiab txias thiab ntev -lub sij hawm kev ntxhov siab. Muab ob npaug rau annealing muaj cua sov thiab cua-cooling ob zaug. Thawj qhov siab -kub annealing yog ua nyob rau ntawm qhov kub siab tshaj los yog ze rau lub recrystallization tiav qhov kub thiab txias, tso cai rau recrystallization mus rau tag nrho yam tsis muaj tseem ceeb grain loj hlob, thiab tswj lub ntim feem ntawm lub ap theem. Tom qab cua txias, lub microstructure tseem tsis ruaj khov txaus, yuav tsum muaj qhov qis thib ob -kub annealing. Qhov kub annealing qis dua qhov kub ntawm recrystallization, thiab lub sij hawm tuav yog ntev dua los tso cai rau cov theem metastable tau los ntawm qhov kub siab tshaj - kub annealing kom tag nrho decompose.
(5) Isothermal annealing. Isothermal annealing yields qhov zoo tshaj plaws plasticity thiab thermal stability. Hom annealing no yog tsim rau duplex titanium alloys nrog cov ntsiab lus siab ntawm -stabilizing ntsiab. Isothermal annealing siv cov txheej txheem txias txias, piv txwv li, tom qab cua sov kom siab tshaj qhov ntsuas kub ntawm recrystallization thiab tuav, nws tam sim ntawd hloov mus rau lwm lub qhov cub ntawm qhov kub qis (feem ntau 600 ~ 650 degree) rau tuav, thiab tom qab ntawd cua - txias rau chav sov.
E-mail:garychen3215@hotmail.com
Chaw nyob: No.35, Baoti Rd, Baoji nroog, Shaanxi Province, Suav
Hu rau: Mr. Gary Chen
Xov tooj: +86-917-8883215
Txawb/WhatsApp: +86 13092900605
