Cov zaj duab xis anodic oxide ntawm cov khoom siv aluminium alloy hauv tsheb ua haujlwm zoo li ib txheej hlau tiv thaiv ntawm lawv qhov chaw. Nws tsim ib txheej tiv thaiv ntom ntom ntawm qhov chaw aluminium alloy, ua kom cov khoom tiv taus corrosion thiab ntev lawv lub neej kev pabcuam. Lub caij no, cov zaj duab xis oxide muaj qhov nyuaj siab, uas tuaj yeem txhim kho qhov hnav tsis kam ntawm qhov chaw aluminium alloy.
Cov zaj duab xis anodic oxide ntawm txhuas alloy yog tus cwj pwm los ntawm qhov tuab me me thiab qhov nyuaj siab. Nws yog qhov tsim nyog los xaiv cov khoom siv kuaj uas haum rau micro hardness kom tsis txhob muaj kev puas tsuaj rau txheej zaj duab xis los ntawm lub indenter. Yog li ntawd, peb pom zoo kom siv lub micro Vickers hardness tester nrog lub zog xeem ntawm 0.01-1 kgf los kuaj nws qhov nyuaj thiab tuab. Ua ntej Vickers hardness xeem, cov khoom ua haujlwm uas yuav tsum tau kuaj yuav tsum tau ua rau hauv cov qauv. Cov khoom siv xav tau yog lub tshuab metallographic mounting (cov kauj ruam no tuaj yeem tshem tawm yog tias cov khoom ua haujlwm muaj ob qhov chaw tiaj tus) los teeb tsa cov khoom ua haujlwm rau hauv cov qauv nrog ob qhov chaw tiaj tus, tom qab ntawd siv lub tshuab sib tsoo thiab polishing metallographic los sib tsoo thiab polishing cov qauv kom txog thaum tau txais qhov chaw ci ntsa iab. Lub tshuab mounting thiab sib tsoo & polishing tshuab tau qhia hauv daim duab hauv qab no:
1. Cov Kauj Ruam Npaj Qauv (Siv Tau Rau Kev Ntsuas Qhov Nyuaj Thiab Qhov Thickness)
1.1 Kev Kuaj: Txiav ib qho qauv ntawm kwv yees li 10mm × 10mm × 5mm ntawm cov khoom uas yuav tsum tau kuaj (zam thaj chaw ntxhov siab ntawm cov khoom), thiab xyuas kom meej tias qhov chaw kuaj yog qhov chaw qub ntawm zaj duab xis oxide.
1.2 Kev Teeb: Teeb cov qauv nrog cov khoom siv teeb tsa kub (piv txwv li, epoxy resin), qhia qhov chaw ntawm zaj duab xis oxide thiab qhov seem (qhov seem yog qhov yuav tsum tau rau kev sim tuab) kom tiv thaiv cov qauv deformation thaum sib tsoo.
1.3 Kev Sib Tsoo thiab Kev Txhuam: Ua ntej, ua cov kauj ruam sib tsoo ntub nrog 400 #, 800 #, thiab 1200 #. Tom qab ntawd txhuam nrog 1μm thiab 0.5μm pob zeb diamond polishing pastes. Thaum kawg, xyuas kom meej tias qhov sib txuas ntawm cov zaj duab xis oxide thiab lub substrate tsis muaj khawb thiab pom tseeb (qhov seem hla yog siv rau kev soj ntsuam tuab).
2. Txoj Kev Ntsuas: Vickers Microhardness Method (HV)
2.1 Lub Ntsiab Cai Tseem Ceeb: Siv lub pob zeb diamond pyramid indenter los siv ib qho me me (feem ntau yog 50-500g) rau ntawm qhov chaw ntawm zaj duab xis los tsim ib qho indentation, thiab xam qhov nyuaj raws li qhov ntev ntawm qhov indentation.
2.2 Cov Kev Ntsuas Tseem Ceeb: Lub nra yuav tsum phim lub thickness ntawm zaj duab xis (xaiv lub nra <100g thaum lub thickness ntawm zaj duab xis <10μm kom tsis txhob muaj kev nkag mus rau hauv lub substrate)
Qhov tseem ceeb yog xaiv ib qho khoom thauj uas phim lub thickness ntawm zaj duab xis thiab tiv thaiv kom tsis txhob muaj ntau dhau los nkag mus rau hauv zaj duab xis oxide, uas yuav ua rau cov txiaj ntsig ntsuas tau suav nrog tus nqi hardness ntawm cov khoom siv aluminium alloy (qhov nyuaj ntawm cov khoom siv qis dua li ntawm cov zaj duab xis oxide).
Yog tias qhov tuab ntawm zaj duab xis oxide yog 5-20μm: Xaiv qhov hnyav ntawm 100-200g (piv txwv li, 100gf, 200gf), thiab qhov txoj kab uas hla ntawm qhov nkag yuav tsum raug tswj tsis pub dhau 1/3 ntawm qhov tuab ntawm zaj duab xis (piv txwv li, rau qhov tuab ntawm zaj duab xis 10μm, qhov kab pheeb ces kaum ntawm qhov nkag ≤ 3.3μm).
Yog tias cov zaj duab xis oxide tuab yog < 5μm (zaj duab xis nyias heev): Xaiv qhov hnyav qis dua 50g (piv txwv li, 50gf), thiab yuav tsum siv lub lens tsom iav loj (40x lossis siab dua) los saib xyuas qhov nkhaus kom tsis txhob nkag mus.
Thaum ua qhov kev sim qhov nyuaj, peb xa mus rau tus qauv: ISO 10074: 2021 "Kev Qhia Txog Kev Siv Cov Tshuaj Anodic Oxide Rau Aluminium thiab Aluminium Alloys", uas qhia meej txog cov zog sim thiab cov qib nyuaj uas yuav siv thaum ntsuas ntau hom oxide coatings nrog lub micro Vickers hardness tester. Cov lus qhia ntxaws ntxaws tau qhia hauv lub rooj hauv qab no:
Rooj: Cov nqi lees txais rau Vickers microhardness xeem
| Cov hlau nplaum | Kev nyuaj me me / HV0.05 |
| Chav Kawm 1 | 400 |
| Chav Kawm 2(a) | 250 |
| Chav Kawm 2(b) | 300 |
| Chav Kawm 3(a) | 250 |
| Chav Kawm 3(b) | Yuav tsum tau pom zoo |
Lus Cim: Rau cov yeeb yaj kiab oxide uas muaj tuab ntau dua 50 μm, lawv cov nqi microhardness qis heev, tshwj xeeb tshaj yog cov txheej sab nraud ntawm zaj duab xis
2.3 Kev Ceev Faj:
Rau tib qho khoom, 3 lub ntsiab lus yuav tsum tau ntsuas hauv txhua 3 thaj chaw sib txawv, thiab tus nqi nruab nrab ntawm 9 lub ntsiab lus ntaub ntawv yuav tsum tau coj los ua qhov nyuaj kawg kom tsis txhob muaj kev cuam tshuam ntawm cov yeeb yaj kiab hauv zos rau cov txiaj ntsig.
Yog tias muaj "cov kab nrib pleb" lossis "cov interfaces tsis meej" tshwm sim ntawm ntug ntawm qhov indentation, nws qhia tau tias qhov hnyav loj dhau thiab tau nkag mus rau hauv txheej zaj duab xis. Qhov hnyav yuav tsum tau txo qis thiab qhov kev sim yuav tsum tau rov ua dua.
Lub sijhawm tshaj tawm: Cuaj hlis-08-2025
