Hauv ob kab lus dhau los, peb tau tshuaj xyuas cov hauv paus hauv paus thiab kev kho kom raug rau cov tshuaj tsis sib xws ntawm titanium alloys. Pib los ntawm kev faib tawm tsis xws luag, peb tau qhia meej txog cov txheej txheem tom qab txiv kab ntxwv tev, cov cim ntws, thiab pitting. Tom qab ntawd peb tau tham txog cov txheej txheem tseem ceeb ntawm cov txheej txheem sib txawv -HF / HNO₃ piv, tswj qhov kub thiab txias, da dej aging, thiab dej dynamics -ua kom pom tseeb tias qhov tsis sib xws tsis yog qhov tsis xws luag tab sis qhov tshwm sim ntawm qhov tshwm sim ntawm qhov tsis sib haum xeeb sab nraum lawv qhov kev pom zoo.
Txawm li cas los xij, txawm tias cov txheej txheem polishing zoo kawg nkaus tuaj yeem raug puas tsuaj los ntawm kev kho tsis zoo tom qab. Hauv qhov thib peb ntu no, peb tsom mus rau cov kauj ruam ua raws li polishing: yaug, passivation, ziab, thiab kev txiav txim siab tshwj xeeb. Peb yuav piav qhia tias yog vim li cas "ob peb kauj ruam kawg" feem ntau dhau los ua qhov tseeb ntawm qhov tsis xws luag, thiab muab cov chaw kuaj xyuas kom paub meej tias cov txhuam tsis sib xws tau khaws cia mus txog qhov ua tiav.
7. Tshaj tawm -Kev kho polishing: Rinsing, Passivation, thiab ziab
Txawm tias ib qho polished zoo kawg nkaus tuaj yeem rhuav tshem los ntawm kev tsis raug cai - kho. Tom qab tshem tawm ntawm polishing da dej, lub workpiece nqa ib txheej ntawm acidic tov uas txuas ntxiv mus yog tsis rinsed. Kev yaug yaug ua rau cov cim tsis sib xws raws li cov kua dej ntws tawm thiab cov pas dej ntawm qhov chaw.
Kev pom zoo ua ntu zus: tam sim ntawd tso rau hauv cov dej deionized ntws, ua raws li qhov thib ob yaug hauv dej tshiab deionized. Rau cov ntawv thov tseem ceeb, cov tshuaj yaug tsis zoo hauv 3-5% nitric acid tshem tawm cov fluorides seem thiab txhawb kev tsim cov txheej txheem huv, tsis tu ncua. Nitric acid yog ib qho zoo passivating tus neeg sawv cev rau titanium, thiab cov kauj ruam no zoo heev txhim kho corrosion kuj uniformity.
Kev ziab yuav tsum tau ua nrog huv, lim cua sov. Cov khoom siv hauv huab cua tsaws rau ntawm qhov chaw ntub dej polished yuav ua rau cov pob zeb uas tsis tuaj yeem tshem tau yooj yim yam tsis muaj re- polishing. Rau siab - cov khoom muaj nqis, qhov kawg dej kub deionized yaug tom qab centrifugal los yog lub tshuab nqus tsev ziab kom tshem tawm cov dej- pom tag nrho.
8. Alloy-Kev txiav txim siab tshwj xeeb
Txawv titanium alloys teb txawv rau tshuaj polishing. CP titanium (Qib 1–4), ua ib zaug -theem, feem ntau polishes ntau uniformly tshaj + alloys zoo li Ti-6Al-4V (TC4) los yog ze - alloys zoo li Ti-10V-2Fe-3Al (TB6). Hauv ob-theem alloys, cov theem muaj cov cwj pwm electrochemical sib txawv dua li theem. Nyob rau hauv qee qhov HF / HNO₃ ratios, theem dissolves nyiam, ua ib tug micro-roughness uas tshwm li txiv kab ntxwv tev ntawm macro scale.
Rau ob-theem alloys, me ntsis siab dua HNO₃ concentrations nyob rau hauv ntau qhov kev lees paub pab tswj theem kev tawm tsam los ntawm kev txhawb nqa cov yeeb yaj kiab tsis zoo. Nyob ze - thiab cov alloys, qee cov kws kho mob txo cov HF concentration mus rau 2-3% thiab ua kom lub sijhawm ua haujlwm sib raug zoo kom ua tiav qib uas tsis muaj qhov sib txawv ntawm kev tawm tsam. Tsis muaj daim ntawv qhia thoob ntiaj teb- kev sim batch ntawm cov qauv piv txwv yog qhov tseem ceeb thaum hloov cov qib alloy.
Xaus
Titanium tshuaj polishing tsis yog-uniformity tsis yog ib qho kev tsim khoom tsis raug, tab sis qhov kev kwv yees tau tshwm sim ntawm cov txheej txheem tshwj xeeb sib txawv ua haujlwm sab nraud lawv qhov kev pom zoo. Cov hauv paus ntsiab lus feem ntau ua rau-HF/HNO₃ qhov piv tsis sib xws, qhov kub thiab txias gradients, da dej aging, tsis txaus agitation, thiab inconsistent ua ntej-kev kho mob- yog tag nrho hais txog los ntawm kev qhuab qhia txheej txheem.
Rau cov khw muag khoom uas muaj teeb meem tsis sib xws, ib qho kev soj ntsuam xyuas ntawm tsib qhov kev ntsuas no yuav txheeb xyuas qhov tseem ceeb hauv feem ntau. Txoj kev daws teeb meem tsis tshua xav tau cov chemistry lossis khoom siv. Hloov chaw, nws xav tau kev saib xyuas rau cov hauv paus ntsiab lus: kev tswj qhov kub thiab txias, kev ua kom muaj zog, kev tu da dej tsis tu ncua, thiab nruj ua ntej - ntxuav. Thaum cov ntsiab lus no tau tswj xyuas kom zoo, titanium tshuaj polishing xa cov ci ntsa iab, zoo li qhov chaw uas cov txheej txheem muaj peev xwm ua tau.
