Titanium rodstau dav siv hauv kev lag luam tshuaj, khoom siv kho mob, high-kawg neeg siv khoom siv hluav taws xob, thiab siab - qhov kub thiab txias resistant yam ntxwv vim lawv zoo heev tshwj xeeb lub zog thiab biocompatibility. Txawm li cas los xij, tom qab kev sib xyaw ua ke, kev kho cua sov thiab kev siv tshuab tshuab, lawv qhov chaw yuav ua rau tsis muaj oxide txheej, cov yeeb yaj kiab nitride thiab cov kab mob seem. Txawm hais tias cov txheej txheem saum npoo no muaj kev tiv thaiv tsis muaj zog, lawv muaj qhov ua rau tsis sib xws ntawm qhov zoo nkauj, qhov sib txawv ntawm qhov sib txawv, thiab kev ruaj ntseg tsis zoo hauv kev vuam tom ntej, anodizing, thiab precision machining. Hauv cov xwm txheej hnyav, cov oxides seem thiab microdefects yuav txo tau qhov ntev - lub sij hawm corrosion kuj ntawm titanium substrates. Yog li ntawd, ua kom tiav thiab cov txheej txheem kev kho saum npoo yog qhov tseem ceeb los tshem tawm cov txheej txheem tsis raug, sib koom ua ke ntawm lub xeev, thiab txhim kho tag nrho cov kev tiv thaiv kev tiv thaiv ntawm titanium rods.
Tag nrho cov txheej txheem kev kho mob ua raws li cov txheej txheem kev ua haujlwm zoo ntawm kev tshem tawm qhov tsis xws luag, theem qhov chaw thiab kev ua kom muaj zog, feem ntau suav nrog kev kho tshuab ua ntej, tshuaj tua kab mob, kev ua kom pom tseeb, kev ntxhov siab thiab kev ua haujlwm, nrog rau kev xaiv ua haujlwm hloov kho.
Mechanical pretreatment yog lub hauv paus tseem ceeb ntawm tag nrho cov txheej txheem.
Tig thiab ntxhib sib tsoo yog siv los tshem tawm cov tawv nqaij dub, oxide nplai thiab microcracks, thaum ntsuas qhov sib npaug thiab ncaj ntawm titanium rods. Xav txog qhov qis thermal conductivity thiab kev ua haujlwm- kev sib zog ntawm titanium alloys, tsis tshua muaj kab nrawm, tus nqi pub loj thiab cua txias txaus yuav tsum tau ua thaum txiav kom tsis txhob hlawv. Raws li qhov no, sandblasting lossis txhaj tshuaj peening tuaj yeem tshem tawm cov tawv nqaij kub- ua cov oxides thiab tsim ib qho micro- ntxhib nto, uas zoo txhim kho lub zog sib txuas ntawm cov txheej txheem tom ntej. Nws yog ib qho tseem ceeb kom tshem tawm tag nrho cov embedded abrasive hais tom qab sandblasting kom tsis txhob muaj kab mob txawv teb chaws.
Raws li cov txheej txheem tseem ceeb, tshuaj pickling txiav txim siab qhov kawg ntawm qhov zoo thiab kev nyab xeeb ntawm titanium rods.
Lub hauv paus pickling system txais kev sib xyaw nitric acid thiab hydrofluoric acid, nrog rau qhov sib piv ntawm 30% -50% nitric acid thiab 3% -8% hydrofluoric acid. Hydrofluoric acid sai dissolves titanium oxide thiab ua micro-etching ntawm lub substrate, thaum nitric acid inhibits corrosion ntau heev thiab txhawb kev tsim dua tshiab ntawm passive films. Cov tshuaj tiv thaiv kub yog tswj ntawm 20-40℃, thiab lub sijhawm ua haujlwm yog li ntawm kaum vib nas this mus rau ob peb feeb kom txog rau thaum cov nyiaj tsis sib xws - grey metallic nto tshwm. Tom qab pickling, kom huv si deionized dej yaug thiab alkaline neutralization yuav tsum tau tshem tawm cov residual acid. Rau siab -load Cheebtsam, lub tshuab nqus tsev dehydrogenation annealing ntawm 650-750℃yog tsim nyog kom tsis txhob muaj hydrogen embrittlement txaus ntshai.
Brightening kho yog customized raws li cov khoom precision qauv.
Semi- polishing tiav tshem tawm qhov me me ntawm qhov tsis sib xws kom ncav cuag Ra 1.6–3.2 μm, muab lub hauv paus zoo ib yam rau kev ua tiav. High-paj precision mechanical polishing tuaj yeem ua tiav ultra- qhov chaw du hauv qab Ra 0.2 μm, haum rau siab -kawg saib accessories thiab precision structural qhov chaw. Sib txawv ntawm kev siv tshuab, electrolytic polishing ua tsis muaj haujlwm ua haujlwm- txheej tawv los yog qhov seem tensile kev nyuaj siab, xa cov khoom sib xws thiab ntws- cim- cov npoo dawb, uas yog cov txheej txheem zoo rau kev kho mob titanium implants xws li pob txha pins thiab cov khoom siv kho hniav.
Passivation thiab ci ntsa iab annealing yog cov kauj ruam tseem ceeb los txhim kho corrosion kuj thiab seem stability.
Bright annealing nyob rau hauv lub tshuab nqus tsev los yog argon tiv thaiv tshem tawm cov machining residual kev nyuaj siab thaum tuav cov thawj metallic luster thiab kho cov khoom yas. Tshuaj passivation siv dilute nitric acid tov generates ib ntom nano -scale titanium dioxide zaj duab xis rau ntawm qhov chaw, kho microscopic defects tsim nyob rau hauv cov txheej txheem yav dhau los thiab zoo heev txhim kho cov tsis kam mus rau acid, chloride thiab ntsev tsuag corrosion.
Rau cov xwm txheej tshwj xeeb ntawm daim ntawv thov, muaj kev pab txhawb nqa kev kho mob.
Anodization tuaj yeem tsim cov oxide zaj duab xis nrog cov xim zoo nkauj thiab txhim kho qhov tawv tawv, tswj cov titanium biocompatibility. Kev ua haujlwm txau ntawm PTFE, ceramic lossis DLC txheej txheej zoo txhim kho qhov hnav tsis kam, siab - qhov kub thiab txias kev ua haujlwm ntawm cov titanium rods.
Hauv kev tsim khoom tiag tiag, cov txheej txheem kev sib xyaw ua ke yog tsim raws li kev pabcuam. Ordinary industrial titanium rods txais pretreatment, pickling thiab passivation; kho mob- cov khoom qib siv cov hydrogen nruj heev- tswj kev khaws cia, electrolytic polishing thiab lub tshuab nqus tsev annealing; siab- cov neeg siv khoom kawg siv daim iav polishing thiab xim anodization; hnav-tiv taus thiab siab- cov khoom kub yuav tsum tau sandblasting roughening thiab ceramic txheej. Tsuas yog los ntawm kev tswj hwm tag nrho - cov txheej txheem tsis tu ncua thiab kev huv tuaj yeem ua tiav cov oxide-dawb, muaj kuab paug-dawb thiab siab- xeb- tiv thaiv qhov chaw, muab kev ua si tag nrho rau kev ua tau zoo ntawm cov ntaub ntawv titanium alloy.
Nyeem ntxiv:Yuav Ua Li Cas Titanium Hlau Thiab Titanium Rods Ntau dua hnav-Resistant