Nitinol Hlau Ua Haujlwm li cas

Nitinol Hlau Ua Haujlwm Li Cas?

Nitinol hlau yog paub txog nws cov khoom tshwj xeeb thiab ntau yam kev siv hauv biomedical, aerospace, thiab automotive industries, thiab lwm yam. Nitinol, tseem hu ua npib tsib xee-titanium alloy, yog lub cim xeeb alloy uas nthuav tawm superelasticity thiab cov duab cim xeeb ntawm qhov sib txawv. Nws ua haujlwm li cas? Hauv tsab xov xwm no, peb yuav tshawb txog cov txheej txheem tsim khoom, cov khoom siv lub cev, thiab kev siv ntawm nitinol hlau.

Nitinol Hlau yog dab tsi?

Nitinol hlauyog ib hom kev nco alloy uas yog ua los ntawm kwv yees li 50 feem pua ​​​​nickel thiab 50 feem pua ​​​​titanium los ntawm qhov hnyav. Nws tau pom nyob rau xyoo 1962 los ntawm William Buehler thiab Frederick Wang ntawm US Naval Ordnance Laboratory. Nitinol muab nws lub npe los ntawm nws cov muaj pes tsawg leeg, xws li npib tsib xee (Ni), titanium (Ti), thiab Naval Ordnance Laboratory (NOL). Nitinol hlau tau txais kev saib xyuas tseem ceeb vim nws cov khoom tshwj xeeb, suav nrog nws cov superelasticity, cov nyhuv nco, biocompatibility, thiab corrosion kuj. Cov khoom no ua rau nws yog cov khoom siv zoo tshaj plaws rau ntau yam kev siv, xws li stents, orthodontic xov hlau, lim ntshav txhaws, thiab cov khoom siv hauv tsheb.

Yuav Ua Li Cas Nitinol Hlau?

Cov txheej txheem ntau lawm ntawm nitinol hlau muaj ob peb kauj ruam, suav nrog alloy melting, casting, kub dov, txias dov, annealing, thiab hlau kos duab. Thawj kauj ruam yog kom yaj cov npib tsib xee thiab titanium ua ke hauv lub tshuab nqus tsev nyob rau hauv kev tswj xyuas kom ua tiav qhov xav tau muaj pes tsawg leeg thiab purity. Tom ntej no, lub molten alloy yog cam khwb cia rau hauv ib tug ingot zoo thiab kub dov rau hauv ib daim ntawv nyias. Daim ntawv yog txias dov mus rau hauv qhov xav tau ntsuas, ua raws li los ntawm annealing kom tshem tawm cov residual stresses thiab txhim khu cov khoom ductility. Thaum kawg, daim ntawv annealed yog kos los ntawm ntau qhov tuag kom tau qhov xav tau txoj kab uas hla, nto tiav, thiab ncaj. Nitinol hlau tuaj yeem ua rau ntau hom, xws li puag ncig, tiaj tus, thiab duab plaub, nyob ntawm daim ntawv thov.

Dab tsi yog Cov Khoom Ntawm Nitinol Hlau?

Nitinol hlau muaj ntau yam khoom tshwj xeeb uas ua rau nws muaj txiaj ntsig zoo hauv ntau qhov kev lag luam. Ib qho ntawm cov khoom muaj npe nrov tshaj plaws yog nws cov duab cim xeeb. Nitinol hlau tuaj yeem "nco" nws cov duab qub thiab tuaj yeem rov qab mus rau nws tom qab deformed nyob rau hauv qee yam mob. Piv txwv li, yog hais tias ib tug nitinol hlau yog khoov rau hauv ib tug tshwj xeeb zoo ntawm qhov kub thiab txias, thaum tshav kub kub, nws yuav rov qab mus rau nws cov qub duab. Ntxiv mus, nitinol nthuav tawm superelasticity, tseem hu ua pseudoelasticity, qhov twg cov khoom tuaj yeem tiv taus cov kab mob loj yam tsis muaj deformation mus tas li. Cov cuab yeej no ua rau nws zoo tagnrho rau cov ntawv thov uas xav tau kev hloov pauv thiab ua haujlwm ntev, xws li stents thiab orthodontics. Tsis tas li ntawd, nitinol hlau yog biocompatible, txhais tau tias nws tsis tsim cov lus teb tsis zoo hauv tib neeg lub cev, ua rau nws zoo tagnrho rau siv hauv cov khoom siv kho mob.

Yuav Ua Li Cas Zoo Nitinol Hlau?

Shaping nitinol hlau yuav tsum muaj kev nkag siab txog nws cov lus teb rau kev hloov kub.NitinolNws muaj ob theem sib txawv: austenite thiab martensite, uas muaj nyob ntawm qhov kub sib txawv. Ntawm qhov kub thiab txias, nitinol yog nyob rau theem martensite, uas yog mos thiab yooj yim rau khoov tab sis yuav tsis rov qab mus rau nws qhov qub. Ntawm qhov kub thiab txias, nitinol hloov mus rau theem austenite, qhov twg nws nyuaj dua thiab tuaj yeem rov qab tau nws cov qub qub thaum deformation. Yog li ntawd, txhawm rau tsim cov nitinol hlau, nws yuav tsum tau ua kom sov siab tshaj nws qhov kev hloov pauv kub, feem ntau ntawm 500 txog 600 degree, mus rau theem austenite. Thaum nws zoo li tus, cov nitinol hlau tuaj yeem txias mus rau theem martensite kom kaw nws cov duab tshiab. Cov cua sov ntawm nitinol hlau yuav ua rau nws rov qab mus rau nws qhov qub.

Yuav Siv Nitinol Hlau Li Cas?

Nitinol hlau muaj ntau daim ntawv thov thoob plaws ntau lub lag luam. Ib qho kev siv ntau tshaj plaws ntawm nitinol hlau yog nyob rau hauv kev kho mob kev lag luam, qhov twg nws yog siv nyob rau hauv stents, orthodontics, thiab phais cov cuab yeej. Nitinol stents yog siv los ua kom cov hlab ntsha qhib, thaum siv cov hlua orthodontic siv los kho cov hniav. Tsis tas li ntawd, nitinol hlau yog siv nyob rau hauv kev lag luam aerospace rau lub cim xeeb actuators nyob rau hauv aircraft, vim nws yog lub teeb thiab ruaj. Nitinol hlau kuj tseem siv rau hauv tsheb engineering rau kev nkag siab lub cav vibrations, tshawb nrhiav suab nrov attenuation schemes, thiab damping mechanism.

Xaus

Hauv kev xaus, nitinol hlau yog ntau yam khoom siv nrog cov khoom tshwj xeeb uas ua rau nws muaj txiaj ntsig hauv ntau daim ntawv thov. Nkag siab txog nws cov txheej txheem tsim khoom, cov khoom siv lub cev, thiab cov ntawv thov tuaj yeem pab tib neeg txaus siab rau cov khoom siv no lub peev xwm thiab ntau yam. Nrog nws cov superelasticity, zoo li lub cim xeeb nyhuv, durability, thiab biocompatibility, nitinol hlau tseem nyob rau hauv lub forefront ntawm kev vam meej technology.

Cov ntaub ntawv:

1. http://journals.sagepub.com/doi/full/10.1243/095441105X69847

2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4230702/

3. https://www.thoughtco.com/nitinol-373296 ib

4. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4665485/

5. https://www.mechanicalbooster.com/2016/10/what-is-nitinol-alloy-how-it-works.html