Dab tsi yog txoj kev kho saum npoo rau titanium alloys?
titanium alloy yog dav siv nyob rau hauv aviation, tshuaj kev lag luam thiab biomedical teb. Txawm li cas los xij, lawv cov hardness tsawg thiab tsis muaj hmoo tus yeeb ncuab ntawm hnav thiab tiv tauj cov khoom txo qis txwv lawv cov ntawv thov. Kev siv cov kev hloov kho saum npoo av los ua haujlwm ntawm cov khoom siv sab nrauv ntawm titanium alloy tau kos rau ntau qhov kev xav. Kev kho tshuaj lom neeg lossis tshuaj oxidation feem ntau yog txoj hauv kev zoo tshaj plaws rau kev ua kom lub zog sib txuas ntawm cov substrate thiab txheej txheej thiab qhov chaw tiv thaiv corrosion. Txawm li cas los xij, txawm li cas los xij, cov oxide zaj duab xis tau los ntawm cov tshuaj oxidation yog nyias thiab tsis zoo corrosion kuj thiab kav ntev. Chemical plating thiab electroplating ntawm titanium yog qhov nyuaj vim yog oxide zaj duab xis ntawm nws qhov chaw. Hauv qhov sib piv, kev kho micro-arc oxidation feem ntau suav tias yog qhov kev cog lus zoo tshaj plaws titanium alloy nto kho txoj kev tam sim no.
Feem ntau, titanium thiab titanium alloys muaj kev hnav tsis zoo dua li cov khoom siv roj ntsha feem ntau CoCr alloy thiab 316L stainless hlau, thiab cov hmoov coj los ua yuav muaj kev cuam tshuam tsis zoo hauv lub cev lom neeg. Yog li ntawd, qee qhov tsim tshiab titanium alloys rau kev siv tshuaj lom neeg feem ntau xav tau kev kho kom zoo rau saum npoo los txhim kho lawv cov hnav ua ntej siv hauv vivo. Txhawm rau txhim kho corrosion kuj, hnav tsis kam, fretting kuj, kub oxidation tsis kam, thiab lwm yam ntawm titanium alloys, kev kho deg ntawm titanium alloys yog ib txoj hauv kev zoo ntxiv rau kev nthuav dav ntawm kev siv titanium alloys. Nws tuaj yeem hais tias kev siv hlau tam sim no Yuav luag tag nrho cov txheej txheem kho saum npoo tau siv rau kev kho saum npoo ntawm titanium alloys, xws li hlau plating, tshuaj plating, thermal diffusion, anodizing, thermal spraying, low-pressure ion technology, electronics. thiab laser nto alloying, thiab non-equilibrium magnetron sputtering txheej. , ion nitriding, PVD zaj duab xis ntau lawm, ion plating, nanotechnology, thiab lwm yam Nws zoo li qhov tsim ntawm TiO, TiN, thiab TiC infiltration coatings rau saum npoo ntawm titanium alloys thiab qhov chaw oxidation kho ntawm TiAlN multilayer nanofilms los txhim kho lawv qhov hnav tsis kam. tseem yog lub hom phiaj ntawm kev tshawb fawb.
Liquid deposition:Ua kua deposition bioceramic txheej ntawm TC4 nto. Nyob rau hauv xyoo tas los no, kev tshawb nrhiav kev tshawb fawb txog kev npaj cov txheej txheem bioceramic rau saum npoo ntawm titanium alloy matrix implants los ntawm kev kho tshuaj tau tshaj tawm rau pej xeem. Piv txwv li, ob-kauj ruam kev kho alkali txheej txheem tau npaj los ntawm kev siv cov txheej txheem kev kho mob siab NaOH lossis H2O2, thiab qee cov neeg tau qhia txog cov khoom siv xws li vinyl triethoxysilane thiab sodium polyacrylate kom tau txais cov txheej txheem bioceramic. Tom qab yooj yim acid-base pretreatment, TC4 titanium alloy yog immersed thiab tso rau hauv ib tug ceev calcification tov (FCS) uas simulates lub cev kua, thiaj li yuav tau gradient-bound titanium-based HA bioceramic txheej composites nrog zoo lom. Txoj kev kawm ntawm txoj kev no muaj qhov tseem ceeb theoretical tseem ceeb thiab muaj peev xwm nyiaj txiag muaj txiaj ntsig rau kev siv ncaj qha ntawm titanium alloys ua cov ntaub so ntswg tawv.
Kev kho deg oxidation:Piv nrog rau lwm cov thev naus laus zis kho deg, ion implantation qhia tau ntau yam zoo. Piv nrog rau lub cev los yog tshuaj vapor deposition, lub ntsiab zoo yog: ① Cov zaj duab xis yog zoo ua ke nrog lub substrate, thiab muaj zog tsis kam mus rau txhua yam thiab tshuaj los tsis tev tawm; ② Implantation Cov txheej txheem tsis tas yuav tsum tau nce hauv qhov kub thiab txias, yog li tswj cov geometric raug ntawm lub workpiece; ③ Cov txheej txheem muaj qhov rov ua tau zoo, thiab lwm yam. Ntau tus kws tshawb fawb tau tshaj tawm tias nitrogen ion implantation muaj txiaj ntsig zoo rau kev txhim kho cov txheej txheem saum npoo, microstructure, hardness thiab tribological zog ntawm Ti6Al4V titanium alloy. TiC kuj yog ib theem superhard, yog li ion implantation ntawm carbon rau hauv titanium alloys kuj tseem ntxiv dag zog rau saum npoo ntawm titanium alloys. Txawm li cas los xij, txij li thaum plasma-based ion implantation tsis yog txheej txheem tas mus li, thaum txhua qhov tsis zoo mem tes muaj peev xwm siv tau, vim tias cov mem tes muaj peev xwm poob los ntawm xoom mus rau lub hav tus nqi, thiab tom qab ntawd nce rov qab mus rau xoom, ob txheej txheem, sputtering thiab implantation, tshwm sim. Yog hais tias lub plasma muaj hlau los yog carbon ions, thaum lub mem tes muaj peev xwm yog xoom, ib txheej carbon deposition yuav raug tsim nyob rau hauv tej yam kev mob. Nyob rau hauv ib tug tej yam mem tes voltage (10~30kV), cov qauv ntawm cov pa roj carbon ib txheej no yuav yog pob zeb diamond zoo li carbon (DLC). Yog li ntawd, cov txheej txheem kev hloov kho saum npoo nrog qis coefficient ntawm kev sib txhuam thiab kev hnav zoo dua li cov txheej txheej nitrogen-txheej tuaj yeem tau txais. Cov pa roj carbon ib txheej ntawm qhov chaw tau sim txiav txim siab ua ib zaj duab xis DLC. Qhov saum npoo hardness ntawm titanium alloy kho nyob rau hauv txoj kev no yog nce 4 zaug. Thaum cov khoom siv tib yam tsim ib qho kev sib txhuam, nyob rau hauv qhov kev sib txhuam qhuav, qhov sib txhuam coefficient poob ntawm 0 · 4 mus rau 0 · 1, thiab hnav tsis kam yog ntau tshaj 30 npaug siab dua qhov tsis muaj ion implantation. .
Ion beam enhanced deposition (IBED):CrC nyuaj zaj duab xis tau npaj siv ion beam enhanced deposition (IBED), uas yuav siv tau rau fretting hnav tiv thaiv ntawm titanium alloys. Kev tshawb fawb qhia tau hais tias CrC qhia qhov zoo tshaj plaws fretting qaug zog yam ntxwv; thiab CrC zaj duab xis coated tom qab txhaj tshuaj peening qhia qhov siab tshaj plaws fretting hnav tsis kam. Ion bombardment: Tom qab kev kho deg ntawm TC11 titanium alloy los ntawm nitrogen ion foob pob, cov txheej txheem hloov kho ntawm TiN thiab Ti2N tuaj yeem tau txais ntawm qhov chaw, nrog lub hardness ntawm 600 ~ 800HV; Qhov nce hauv qhov tawv tawv yog qhov tsim nyog rau kev txhim kho qhov hnav tsis kam ntawm TC11 titanium alloy. Plasma nitriding thiabtxhaj tshuaj peening:DC pulse plasma fais fab mov khoom siv yog siv los nitriding nto ntawm Ti6Al4V titanium alloy, thiab txhaj tshuaj peening deformation ntxiv dag zog rau (SP) yog siv los ua cov txheej txheem nitriding tom qab. TiN, Ti2N, thiab Ti2A1N tau txais nyob rau saum npoo ntawm titanium alloy. Ib txheej txheej nitrided uas muaj cov theem sib npaug, cov txheej txheem hloov kho no tuaj yeem txhim kho cov pa hnav thiab fretting hnav (FW) tsis kam ntawm titanium alloys, tab sis txo cov FF tsis kam ntawm cov khoom siv hauv paus. Kev sib txhuam-txo thiab tiv thaiv hnav cov khoom ntawm nitrided txheej ua haujlwm sib koom ua ke nrog qhov seem seem compressive kev ntxhov siab qhia los ntawm SP, ua rau titanium alloy FF tsis kam tshaj li ntawm SP ib leeg. Kev txhim kho cov tawv tawv ntawm cov txheej nitrided yog qhov tseem ceeb heev rau kev txhim kho FF thiab FW cov khoom
ntawm titanium alloys. DLC membrane:Composite carbon daim nyias nyias muaj lub cev, txhua yam thiab tshuaj lom neeg, thiab nws tau raug siv los ua cov khoom ntawm ntau cov kev tshawb fawb. Lub hom phiaj tseem ceeb ntawm kev siv xov tooj cua zaus plasma txhim kho cov tshuaj vapor deposition txoj kev los npaj cov pob zeb diamond zoo li cov pa roj carbon films yog los txhim kho cov tawv tawv thiab kev sib txhuam ntawm titanium alloys. Cov txiaj ntsig kev sim qhia tau hais tias yog cov ntsiab lus titanium hauv zaj duab xis tshaj 9%, qhov hardness ntawm zaj duab xis yuav txo qis, thiab lub zog sib txuas ntawm lub hauv paus zaj duab xis kuj tseem txwv.
AC micro-arc oxidation:Micro-arc oxidation (MAO) yog cov cuab yeej tshiab rau kev loj hlob oxide ceramics ntawm cov hlau. Nws tsim los ntawm anodizing, tab sis nws siv lub siab voltage ntawm ob peb puas volts, tawg los ntawm voltage txwv ntawm anodizing. Cov tshuab no ncaj qha hloov cov hlau hauv paus rau hauv oxide ceramics los ntawm instantaneous high-temperature thiab high-pressure sintering nyob rau hauv micro-arc paug cheeb tsam, thiab tau ib tug thicker oxide zaj duab xis. Rau lub micro-arc oxidation zaj duab xis nyob rau saum npoo ntawm titanium alloy, lub hardness ntawm cov zaj duab xis tau yog siab thiab nws yog zoo ua ke nrog cov hlau matrix. Nws txhim kho cov hnav tsis kam, corrosion kuj, thermal shock kuj thiab rwb thaiv tsev cov khoom ntawm titanium alloy nto, thiab muaj daim ntawv thov kev cia siab hauv ntau qhov chaw.
