Dab tsi yog npib tsib xee-titanium alloy?
Npib tsib xee-titanium alloy
Nickel-titanium alloy yog cov duab nco tagnrho. Cov duab nco tagnrho Alloy yog ib qho tshwj xeeb alloy uas tuaj yeem rov qab nws cov khoom siv yas ntxiv rau nws cov qauv qub ntawm ib qho kub. Nws tus nqi nthuav dav yog saum toj 20%, thiab nws lub neej qaug zog yog 1 * 10 txog 7 lub zog 7. Nws cov yam ntxwv damping yog 10 lub sij hawm siab dua li cov neeg txawv txawv. Nws corrosion tsis kam yog qhov zoo dua li qhov kev kho mob kho mob zoo tshaj plaws uas muaj. Yog li ntawd, nws tuaj yeem ua tau raws li cov ntawv thov yuav tsum muaj ntawm kev tsim khoom thiab kev kho mob thiab yog cov khoom ua haujlwm zoo.
Ntxiv rau nws cov cim cim cim xeeb kev ua haujlwm, cov cim nco tau muaj xws li kev coj tsis kam, corrosion tsis kam, siab damping thiab superelasticity.
Kev ua tau zoo thiab yam ntxwv
(I) theem hloov pauv thiab ua haujlwm ntawm npib tsib xee-titanium alloy
Raws li lub npe qhia, npib tsib xee-titanium alloy yog ib qho binary alloy muaj cai ntawm npib tsib xee thiab titanium. Vim tias hloov qhov kub thiab txias thiab siv cov qauv crystal sib txawv theem, uas yog Austenite theem thiab Martite theem. Cov theem hloov pauv ntawm Nickel-Titanium Alloy thaum cua txias yog theem niam txiv (Austenite theem) -R theem-martensite theem. Lub R Pase yog ib theem rhombus, thiab lub xeev thaum kub thiab txias dua (ntau dua li mf: qhov kub tshaj plaws uas tau tshem tawm (ntau dua li ntawm cov khoom siv hluav taws xob), uas yog lub voos xwmfab thiab nyuaj. Cov duab yog qhov sib luag. Lub Martensite theem yog lub xeev thaum qhov kub thiab txias dua mak: qhov kub thiab txias, tsis muaj zog, tsis ruaj khov, thiab yooj yim rau deform.
(II) Cov khoom tshwj xeeb ntawm Nickel-Titanium alloys
1. Cov qauv cim xeeb (duab nco) Cov cim xeeb ntawm niam txiv yog qhov txias dua, thiab tom qab ntawd cov khoom kub siab rau hauv qab no, thiab tom qab ntawd cov khoom siv tau rov qab ua dua hauv niam txiv theem. Qhov tseeb, cov qauv nco tau yog ib qho kev hloov pauv theem hloov pauv ntawm npib tsib xee-titanium alloys.
2. Superelasticity qhov thiaj li hu superelastic yog hais txog qhov tshwm sim nyob rau hauv kev txiav txim siab ntawm kev quab yuam sab nraud, thiab cov leeg tuaj yeem rov qab thaum tsis yooj yim. Ntawd yog, hauv theem pib niam txiv, vim muaj kev ntxhov siab sab nraud, yog li ntawd cov khoom siv tsis sib haum xeeb txawv dua li ntawm cov khoom noj distified? Piv nrog cov duab nco cov khoom, superelasticity tsis muaj kev koom tes thermal. Hauv ntej, superelasticity txhais tau tias tsis pub dhau qee yam deformation ntau, kev nyuaj siab tsis nce ntxiv nrog kev nce ntawm. Superelasticity tuaj yeem muab faib ua linear superelasticity thiab nonlinear superelelasticity. Hauv kev ntxhov siab-lim nkhaus ntawm cov qub, qhov kev ntxhov siab thiab kev sib cav yog ze rau txoj kev sib raug zoo linear. Nonlinear superers yog hais txog qhov tshwm sim ntawm kev ntxhov siab theem kev hloov pauv thaum lub sij hawm thauj khoom thiab tsis tau hu ua theem hloov pseudoelasticity. Theem Hloov Pseudoelasticity ntawm Nickel-Titanium Alloy tuaj yeem ncav cuag txog 8%. Lub superelasticity ntawm npib tsib xee-titanium alloy tuaj yeem hloov pauv nrog kev hloov pauv ntawm kev kho cua sov. Thaum lub hneev kooj yog rhuab mus rau saum 400 degree, lub superelasticity pib txo qis.
