Dab tsi yog txoj kev kho saum npoo rau aluminium alloy castings?

Aluminium alloy castings yog tsim los siv siab- cov txheej txheem tuag casting / xuab zeb casting, muaj cov yam ntxwv ntawm lub teeb yuag, lub zog siab, corrosion tsis kam, thiab thermal conductivity, ua rau lawv tsim nyog rau cov qauv tsim. Qhov saum npoo yog kho nrog cov txheej txheem xws li anodizing thiab txau, nrog rau qhov ntev ntawm kev tswj tsis pub dhau ± 0.05 hli. Lawv tau siv dav hauv cov twj tso kua mis thiab cov npog, cov khoom siv tsheb, cov pwm pwm, thiab lwm yam kev lag luam, txhawb kev tsim khoom kom tau raws li qhov hnyav thiab tus nqi - cov kev xav tau zoo.

 

Cov txheej txheem kho saum npoo rau aluminium alloy castings feem ntau suav nrog kev siv tshuab, kev kho tshuaj, electroplating, txau, thiab lwm yam kev kho mob. Nov yog qee cov txheej txheem:

 

I. Mechanical processing
1. Sib tsoo: Siv cov cuab yeej sib tsoo thiab abrasives, qhov chaw ntawm aluminium alloy casting yog finely polished kom zoo tshem tawm cov teeb meem me me thiab tsis sib xws, txhim kho qhov chaw tiav. Qhov no feem ntau yog siv rau aluminium castings xav tau qhov zoo ntawm qhov chaw, xws li precision ntsuas qhov chaw.
2. Polishing: Siv polishing log, polishing pastes, thiab lwm yam cuab yeej thiab cov ntaub ntawv, qhov saum npoo ntawm aluminium alloy casting yog raug siab -kev sib txhuam ceev thiab kev sib tsoo kom txhim kho qhov chaw tiav, ua tiav daim iav- zoo li cov nyhuv thiab txhim kho cov tsos thiab luster. Qhov no feem ntau yog siv rau cov hniav aluminium castings, xws li txhuas qhov rooj thiab qhov rais thiab rooj tog fittings.
3. Sandblasting: Siv cov cua compressed los project xuab zeb hais los yog lwm yam abrasives mus rau saum npoo ntawm aluminium alloy casting kom tshem tawm oxide nplai, burrs, roj stains, thiab lwm yam impurities. Qhov no kuj tsim qhov roughness, ua rau adhesion ntawm cov txheej tom ntej los yog kev kho mob. Dav siv rau pretreatment ntawm ntau yam aluminium alloy castings, xws li automotive cav blocks thiab mechanical qhov chaw.

 

II. Tshuaj kho mob
1. Acid Pickling: Siv cov tshuaj acidic xws li sulfuric acid thiab hydrochloric acid kom tshem tawm oxide nplai, xeb, thiab av ntawm qhov chaw ntawm aluminium alloy casting. Tom qab pickling, qhov saum npoo yuav huv dua, muab lub hauv paus zoo rau kev kho mob tom ntej. Txawm li cas los xij, kev tu kom huv thiab nruab nrab yuav tsum tau ua tom qab pickling los tiv thaiv residual acid los ntawm corroding aluminium casting.
2. Kev Tu Alkaline: Siv cov tshuaj alkaline xws li sodium hydroxide thiab sodium carbonate kom tshem tawm cov roj, cov roj stains, thiab lwm yam khoom muaj kuab paug los ntawm qhov chaw ntawm aluminium alloy casting. Alkaline ntxuav kuj tuaj yeem qhib qhov chaw ntawm aluminium alloy castings, ua rau lawv cov tshuaj reactivity thiab yooj yim rau kev kho mob tom ntej xws li electroplating thiab txheej.
3. Anodizing: Aluminium alloy casting yog siv los ua cov anode thiab muab tso rau hauv cov tshuaj electrolyte. Los ntawm electrolysis, ib qho nyuaj, hnav-resistant, thiab corrosion-resistant oxide zaj duab xis yog tsim rau ntawm nws nto. Cov oxide zaj duab xis no tsis tsuas yog txhim kho corrosion kuj thiab hnav tsis kam ntawm aluminium alloy casting, tab sis kuj tuaj yeem dyed kom tau txais cov xim sib txawv thiab cov teebmeem zoo nkauj. Nws yog dav siv nyob rau hauv txhuas castings nyob rau hauv aerospace, automotive, thiab electronics teb.
4. Kev kho mob Passivation: Ib daim nyias nyias, tuab tiv thaiv zaj duab xis yog tsim rau ntawm aluminium nto los ntawm cov txheej txheem tshuaj los txhim kho nws cov corrosion kuj. Feem ntau siv los ua ib feem ntawm kev tiv thaiv corrosion, nws muab kev tiv thaiv corrosion zoo rau txhuas castings nyob rau hauv atmospheric ib puag ncig, thiab cov txheej txheem yog yooj yim thiab tsawg - nqi. Feem ntau siv rau aluminium castings nyob rau hauv kev lag luam kev siv.

 

III. Kev kho electroplating
1. Chromium plating: Cov chromium plating txheej muaj siab hardness, hnav tsis kam, thiab corrosion kuj, ho txhim kho qhov tawv hardness thiab hnav tsis kam ntawm txhuas castings thaum muab lawv ib tug kaj tsos. Nws yog feem ntau siv rau txhuas castings xav tau siab hardness, siab hnav tsis kam, thiab cov khoom zoo nkauj, xws li cov khoom siv tsheb thiab cov khoom siv tshuab.
2. Nickel plating: Cov nickel plating txheej txhim kho corrosion kuj thiab hnav tsis kam ntawm aluminium alloy castings thiab feem ntau yog siv rau cov khoom siv hluav taws xob thiab cov khoom zoo nkauj.
3. Zinc plating: zinc plating txheej muab kev tiv thaiv electrochemical zoo rau aluminium alloy castings, tiv thaiv corrosion. Zinc plating yog qhov pheej yig thiab muaj kev tiv thaiv corrosion zoo thiab cov khoom zoo nkauj thiab yog dav siv hauv aluminium castings hauv kev tsim kho thiab kev tsim khoom.
4. Tin plating: suav nrog cov txheej txheem xws li crystalline tin plating, qhov no yog txheej txheem kho kom zoo nkauj saum npoo uas cuam tshuam nrog kev tso cov tin txheej ntawm cov hlau nto hauv cov theem thiab siv cov yam ntxwv ntawm melting thiab crystallization ntawm tin los ua peb - qauv. Nws yog tsuas yog siv rau saum npoo kho kom zoo nkauj ntawm txhuas thiab txhuas alloy khoom xws li cov khoom siv niaj hnub thiab cov khoom siv hauv tsev.
5. Electroless tooj liab plating Electroplating tooj liab: Electroless plating siv cov tshuaj tiv thaiv kom tso cov hlau los yog alloy plating txheej rau saum npoo ntawm aluminium alloy castings yam tsis muaj lub zog sab nraud. Nws yog ib qho yooj yim rau kev khiav lag luam thiab tsim ib tug niaj hnub, ntom plating txheej nrog zoo corrosion kuj thiab hnav tsis kam, haum rau aluminium alloy castings nrog complex duab. Electroplating tooj liab suav nrog tso cov txheej tooj liab rau saum npoo ntawm aluminium alloy castings los ntawm electrolysis, txhim kho conductivity thiab cov khoom zoo nkauj.

 

IV. Txau txheej kho
1. Txau Painting: Cov xim ua kua yog txau rau saum npoo ntawm aluminium alloy castings siv rab phom txau, tsim cov xim pleev xim rau cov yeeb yaj kiab. Nws muaj ntau yam xim thiab sib txawv gloss ntau ntau kom tau raws li kev xav tau ntawm kev kho kom zoo nkauj, thaum tseem muab kev tiv thaiv corrosion. Feem ntau siv hauv aluminium castings rau tsheb, maus taus, thiab rooj tog kev lag luam.
2. Powder Txheej: Cov hmoov txheej yog siv rau saum npoo ntawm aluminium alloy castings siv txoj kev xws li electrostatic spraying lossis fluidized txaj txau thiab tom qab ntawd kho rau hauv zaj duab xis los ntawm kev kub siab - ci. Hmoov txheej muaj qhov zoo xws li ib puag ncig tus phooj ywg, kev ua haujlwm zoo, thiab cov txheej txheem muaj zog thiab ruaj khov, muab kev tiv thaiv corrosion zoo heev, hnav tsis kam, thiab cov khoom zoo nkauj. Siv dav hauv lub tsev qhov rooj thiab qhov rais, cov khoom siv hauv tsev, thiab cov khoom siv tsheb.

V. Lwm yam kev kho mob
3. Electrophoretic Txheej: Aluminium alloy casting yog muab tso rau hauv cov xim electrophoretic tank raws li anode los yog cathode, thiab cov resin hais nyob rau hauv cov xim yog muab tso rau saum npoo ntawm aluminium casting los ntawm electrophoresis los ua ib zaj duab xis xim. Electrophoretic txheej muaj qhov zoo xws li cov yeeb yaj kiab tuab, muaj zog adhesion, thiab zoo corrosion kuj thiab feem ntau yog siv rau kev kho deg ntawm tsheb thiab khoom kho vajtse.
4. Phosphating Treatment: Ib qho phosphate hloov dua siab tshiab zaj duab xis yog tsim rau saum npoo ntawm aluminium alloy casting, uas txhim kho corrosion kuj thiab txheej adhesion ntawm aluminium alloy casting, muab lub hauv paus zoo rau cov txheej txheem tom ntej los yog lubrication. Feem ntau siv nyob rau hauv automotive thiab machinery manufacturing industries.