Nitinol yog lub cim xeeb alloy, uas yog ib qho tshwj xeeb alloy uas tuaj yeem rov qab kho nws tus kheej cov yas deformation rau nws cov duab qub ntawm qhov kub thiab txias. Nws txoj kev ncab yog siab dua 20 feem pua, lub neej qaug zog nce mus txog 1 * 10 mus rau 7th lub zog, cov yam ntxwv damping yog 10 npaug siab dua li cov springs zoo tib yam, thiab nws cov corrosion kuj zoo dua li qhov zoo tshaj plaws kev kho mob stainless hlau tam sim no, yog li nws muaj peev xwm ua tau raws li ntau yam engineering. thiab Nws yog ib qho khoom siv zoo heev rau kev siv tshuaj.
Ntxiv nrog rau nws cov cim cim xeeb muaj nuj nqi, nco alloys kuj muaj cov yam ntxwv zoo xws li hnav tsis kam, corrosion kuj, siab damping thiab superelasticity.
Segment Performance thiab nta:
) Kev hloov pauv theem thiab kev ua haujlwm ntawm Nitinol
Raws li lub npe qhia, Nitinol yog binary alloy uas muaj cov nickel thiab titanium. Vim qhov kev hloov pauv ntawm qhov kub thiab txias, muaj ob theem sib txawv ntawm cov qauv siv lead ua, uas yog austenite theem thiab martensite theem. Theem transformation sequence of nickel-titanium alloy thaum lub caij txias yog niam txiv theem (austenite theem)-R theem-martensite theem. R theem yog lub rhombus, thiab lub austenite yog lub voos xwmfab thaum qhov kub thiab txias (ntau dua li qub: uas yog, qhov kub ntawm austenite pib), lossis thaum lub load raug tshem tawm (deactivation los ntawm sab nraud quab yuam). Cov duab yog qhov ruaj khov. Lub sijhawm martensite yog lub xeev thaum qhov kub thiab txias tsis tshua muaj (tsawg dua Mf: qhov kub ntawm qhov martensite xaus) los yog thauj khoom (tsim los ntawm sab nraud quab yuam), hexagonal, ductile, rov ua dua, tsis tshua muaj zog, thiab yooj yim dua ntawm cov duab.
2.) Cov khoom tshwj xeeb ntawm Nitinol
01. Shape memory shape memory txhais tau hais tias thaum lub sij hawm niam txiv ntawm ib tug tej yam zoo li txias los ntawm saum toj no lub Af kub mus rau hauv qab lub Mf kub los ua martensite, lub martensite yog deformed ntawm ib tug kub hauv qab Mf thiab rhuab mus rau hauv qab ntawm Af kub. Nrog rau qhov hloov pauv hloov pauv, cov khoom yuav rov qab tau nws cov duab hauv niam txiv theem. Nyob rau hauv qhov tseeb, cov duab nco nyhuv yog lub tshav kub-induced theem transformation txheej txheem ntawm nickel-titanium alloy.
02. Superelasticity Lub npe hu ua superelasticity yog hais txog qhov tshwm sim uas cov qauv ua rau muaj qhov hnyav ntau dua li qhov kev txwv elastic nyob rau hauv qhov kev txiav txim ntawm ib qho kev quab yuam sab nraud, thiab cov kab mob tuaj yeem tuaj yeem rov qab thaum tshem tawm. Ntawd yog, nyob rau hauv lub xeev ntawm cov niam txiv theem, vim yog qhov kev txiav txim ntawm kev ntxhov siab sab nraud, kev ntxhov siab vim kev hloov pauv ntawm martensitic tshwm sim, yog li ntawd cov hlau ua rau cov neeg kho tshuab tus cwj pwm txawv ntawm cov ntaub ntawv zoo tib yam, thiab nws cov kev txwv elastic yog ntau dua. uas yog cov ntaub ntawv zoo tib yam, thiab nws tsis ua raws li txoj cai Hu Gram lawm. Nyob rau hauv sib piv rau lub cim xeeb zog, superelasticity tsis muaj thermal kev koom tes. Tag nrho cov nyob rau hauv tag nrho cov, hyperelasticity txhais tau hais tias qhov kev ntxhov siab tsis nce nrog rau qhov nce ntawm strain nyob rau hauv ib tug tej yam deformation ntau yam, thiab superelasticity yuav muab faib ua linear hyperelasticity thiab nonlinear hyperelasticity. Nyob rau hauv lub qub kev nyuaj siab-strain nkhaus, kev sib raug zoo ntawm kev nyuaj siab thiab strain yog ze rau linear. Nonlinear hyperelasticity yog hais txog qhov tshwm sim ntawm kev ntxhov siab vim kev hloov pauv martensitic thiab nws qhov hloov pauv hloov pauv thaum lub sijhawm thauj khoom thiab tshem tawm hauv qee qhov kub siab tshaj Af, yog li nonlinear superelasticity kuj hu ua theem hloov pauv pseudoelasticity. Cov theem hloov pseudo-elasticity ntawm nickel-titanium alloy tuaj yeem ncav cuag li 8 feem pua. Lub superelasticity ntawm Nitinol tuaj yeem hloov pauv nrog kev hloov pauv ntawm kev kho cua sov. Thaum lub archwire yog rhuab tshaj 400ºC, lub superelasticity pib poob.
03.) rhiab heev rau qhov kub thiab txias hloov nyob rau hauv lub qhov ncauj kab noj hniav: lub orthodontic quab yuam ntawm stainless hlau hlau thiab CoCr alloy orthodontic hlau yog yeej tsis cuam tshuam los ntawm kub nyob rau hauv lub qhov ncauj kab noj hniav. Lub orthodontic quab yuam ntawm superelastic nickel-titanium alloy orthodontic hlau hloov nrog kev hloov ntawm qhov ncauj qhov ntswg. Thaum tus nqi ntawm deformation yog tas li. Raws li qhov kub thiab txias nce, qhov kev kho quab yuam nce. Ntawm qhov tod tes, nws tuaj yeem ua kom nrawm nrawm ntawm cov hniav, vim tias qhov kub thiab txias hloov ntawm lub qhov ncauj kab noj hniav yuav txhawb nqa cov ntshav ntws hauv qhov tsis txaus ntawm cov ntshav ntws los ntawm capillary stagnation tshwm sim los ntawm cov cuab yeej orthodontic, kom kho. cov hlwb tuaj yeem txhawb nqa tag nrho thaum lub sijhawm txav ntawm cov hniav, tswj nws qhov tseem ceeb thiab ua haujlwm zoo. Ntawm qhov tod tes, orthodontists tsis tuaj yeem tswj xyuas lossis ntsuas qhov kho kom raug nyob rau hauv qhov chaw ntawm qhov ncauj.
04.) Kev tiv thaiv corrosion: Cov kev tshawb fawb tau pom tias corrosion kuj ntawm nickel-titanium hlau zoo ib yam li cov hlau tsis muaj steel hlau.
05.) Anti-toxicity: Nitinol zoo nco alloy muaj cov tshuaj lom neeg tshwj xeeb, uas yog, nws yog ib qho atomic alloy xws li npib tsib xee thiab titanium, muaj li ntawm 50 feem pua nickel, thiab npib tsib xee paub tias muaj cov kab mob carcinogenic thiab mob qog noj ntshav. Feem ntau, txheej txheej titanium oxidation ua raws li kev thaiv, ua rau Ni-Ti alloys muaj biocompatibility zoo. TiXOy thiab TixNiOy hauv txheej txheej tuaj yeem cuam tshuam qhov tso tawm Ni.
06.) Lub zog orthodontic: Tam sim no, orthodontic hlau xaim siv lag luam suav nrog austenitic stainless hlau xaim, cobalt-chromium-nickel alloy hlau, nickel-chromium alloy hlau, Australian alloy hlau, kub alloy hlau thiab ß-titanium alloy hlau. Load-displacement curves rau cov xov hlau orthodontic nyob rau hauv kev sim tensile thiab peb-point dabtsi yog khoov kuaj tej yam kev mob. Lub toj siab ntawm lub unloading nkhaus ntawm npib tsib xee-titanium alloy yog qhov qis tshaj plaws thiab flattest, qhia tau hais tias nws muaj peev xwm muab lub zog ruaj khov thiab muag muag.
07.) Cov yam ntxwv zoo ntawm kev poob siab: qhov ntau dua qhov kev co tshwm sim los ntawm zom thiab bruxism ntawm lub koov hlau, qhov ntau dua qhov kev puas tsuaj rau cov hauv paus hniav thiab cov ntaub so ntswg. Raws li cov txiaj ntsig ntawm kev sib txawv archwire attenuation thwmsim, nws pom tau hais tias qhov kev vibration amplitude ntawm stainless hlau hlau yog loj dua li ntawm superelastic npib tsib xee-titanium hlau, thiab qhov pib vibration amplitude ntawm superelastic nickel-titanium archwire tsuas yog ib nrab ntawm. uas yog cov hlau stainless hlau. Kev noj qab haus huv ntawm kev kho hniav yog qhov tseem ceeb heev, thiab cov kab ke ib txwm muaj xws li cov hlau tsis muaj steel zoo li ua rau cov hauv paus resorption.
