Cov lus Askiv luv luv ntawm micro-arc oxidation yog MAO, thiab nws lwm lub npe yog micro-plasma oxidation, thiab cov lus Askiv luv yog MPO. Los ntawm kev sib xyaw ntawm cov electrolyte thiab cov khoom siv hluav taws xob sib txuas, cov txheej txheem ceramic feem ntau yog ua los ntawm cov hlau oxide matrix loj hlob rau saum npoo ntawm aluminium, magnesium, titanium, thiab nws cov alloys los ntawm kev cia siab rau qhov kub thiab txias sai sai thiab siab siab tsim los ntawm arc tawm.
Noj cov microarc plasma oxidation ntawm txhuas thiab nws cov alloys ua piv txwv, txhuas thiab nws cov alloys muab tso rau hauv ib qho kev daws teeb meem electrolyte, thiab cov pa paug tawm yog tsim nyob rau hauv micropores ntawm cov khoom los ntawm high-voltage paug. Raws li kev sib koom ua ke ntawm -Al203-raws li thiab r-Al203- muaj txheej txheej tawv ceramic, txheej txheej tawv ceramic yog tsim rau ntawm nws qhov chaw. Lub hauv paus ntsiab lus ntawm microarc oxidation tshuab zoo ib yam li cov tshuab anodic oxidation, qhov sib txawv yog tias cov tshuaj tiv thaiv ntawm cov anode yog txhim kho los ntawm plasma paug.
Microarc oxidation yog nyob rau hauv lub txim hluav taws xob cheeb tsam, thiab qhov voltage yog kuj siab. Thaum lub anodic oxidation voltage ntau tshaj ib tug nqi, oxide zaj duab xis nrog ib tug tej yam degree ntawm rwb thaiv tsev nyob rau hauv lub qhov chaw yog tawg, tsim micro-arc paug, thiab tsim ib tug instantaneous ultra-siab kub cheeb tsam (nyob rau hauv lub cheeb tsam no, lub oxide. Los yog lub hauv paus hlau yog melted los yog txawm gasified, nyob rau hauv kev sib cuag nrog cov electrolyte, cov khoom molten yog chilled los ua ib tug non-metallic ceramic txheej; zaj duab xis txheej yog uniform thiab ntom, thiab lub pores kuj loj. , thiab kev ua tau zoo ntawm cov zaj duab xis txheej tau zoo heev.Vim lub peev xwm ntawm cov zaj duab xis txheej yuav tsum tau tawg nyob rau hauv qhov kev txiav txim ntawm high-voltage hluav taws xob teb, lub diffusion muaj peev xwm ntawm zoo thiab tsis zoo ions nyob rau hauv zaj duab xis txheej. Txhim kho, thiab microarc oxidation tuaj yeem tau txais cov zaj duab xis tuab dua li anodic oxidation. kuj yuav tau. Txij li thaum lub micro-arc oxidation ceramic yog dense ceramic txheej, nws tuaj yeem txhim kho cov hlau nto, nws tuaj yeem txhim kho cov hluav taws xob, thiab kev kub ntxhov ntawm cov khoom nws tus kheej.
Nws cov txheej txheem tseem ceeb yog:
Degreasing - dej ntxuav - micro-arc oxidation - ntxuav dej ntshiab - sealing - ziab
Da dej / Khoom siv
Qhov sib xyaw ntawm micro-arc oxidation tov yog qhov yooj yim. Tam sim no, feem ntau cov da dej yog feem ntau tsis muaj zog alkaline aqueous daws. Sodium silicate, sodium aluminate, lossis sodium phosphate feem ntau ntxiv rau cov tshuaj da dej tiag tiag. Txhawm rau kom tau txais cov yeeb yaj kiab micro-arc oxidation ntawm ntau cov xim, cov hlau sib txawv kuj tuaj yeem muab ntxiv, thiab cov hlau sib txawv tuaj yeem tso thiab doped hauv micro-arc oxidation zaj duab xis kom tau txais cov xim sib xws, xws li Na2WO4, NH4VO3, thiab lwm yam.
Txheej txheem piv txwv:
Electrolyte muaj pes tsawg leeg: K2SiO3 5-10g/L, Na2O2 4-6g/L, NaF 0.5-1g/L, CH3COONa 2-3g/L, Na3VO 4 1-3g/L; tshuaj pH yog 11-13; kub yog 20- 50 degree ; cov khoom siv cathode yog stainless hlau phaj; txoj kev electrolysis yog kom ceev qhov voltage mus rau 300V thiab khaws cia rau 5-10s, ces nce anodic oxidation voltage rau 450V thiab ua electrolysis rau 5-10 feeb.
Schematic daim duab ntawm microarc oxidation khoom:
Kev thov txheej txheem
Lub microarc oxidation zaj duab xis txheej muaj hnav tsis kam, corrosion kuj, siab hardness, tsis tshua muaj hnav, thiab kub tsis kam. Nws feem ntau yog siv rau hauv tsheb, aerospace, nkoj, riam phom, thiab lwm yam lag luam, xws li tsheb motors, pistons, bearings, thiab lwm yam txhuas alloys. Kev kho deg yog siv lub siab hardness thiab tsis tshua hnav cov yam ntxwv ntawm micro-arc oxidation zaj duab xis txheej. Tseem muaj nkoj impellers, connectors, yeeb nkab fittings, thiab lwm yam uas siv lawv cov yam ntxwv corrosion kuj.
Cov yam ntxwv txheej txheem
- Qhov saum npoo hardness ntawm cov khoom tau zoo heev. Lub microhardness muaj li ntawm 1000 txog 2000HV, mus txog 3000HV, uas yog piv rau cov cemented carbide, thiab zoo heev tshaj li cov high-carbon steel, high-alloy steel thiab high-ceev cuab yeej steel tom qab kev kho cua sov. hardness;
- Zoo hnav tsis kam;
- Zoo kub tsis kam thiab corrosion kuj. Qhov no tseem ceeb kov yeej qhov tsis txaus ntawm txhuas, magnesium, thiab titanium alloy cov ntaub ntawv hauv daim ntawv thov, yog li cov thev naus laus zis no muaj cov ntawv thov dav dav;
- Nws muaj kev rwb thaiv tsev zoo, thiab cov rwb thaiv tsev tiv thaiv tuaj yeem ncav cuag 100MΩ.
- Kev daws yog ib puag ncig tus phooj ywg thiab ua tau raws li kev tiv thaiv ib puag ncig emission.
- Cov txheej txheem yog ruaj khov thiab txhim khu kev qha, thiab cov cuab yeej siv tau yooj yim.
- Cov tshuaj tiv thaiv yog nqa tawm ntawm qhov kub thiab txias, thiab kev ua haujlwm yog yooj yim thiab yooj yim rau tus tswv.
- Ceramic zaj duab xis yog loj hlob nyob rau hauv situ ntawm lub substrate, kev sib xyaw ua ke yog ruaj, thiab ceramic zaj duab xis yog ntom thiab uniform.