I. Visual Inspection: Thawj Qhov Zoo
High-zoo chrome- cov pas nrig plated yuav tsum muaj qhov du thiab tiaj tus nrog daim iav zoo ib yam- zoo li luster, tsis muaj qhov tsis xws luag pom ntawm qhov muag liab qab. Ua tib zoo saib xyuas qhov muaj cov txiv kab ntxwv tev kev ntxhib los mos, npuas, tawg, tev, khawb, lossis xim txawv. Lub plating hloov ntawm cov npoo thiab cov ces kaum yuav tsum yog ntuj, tsis muaj kev txuam nrog lossis tsis tiav plating. Qhov chaw ntxhib los yog nplaum nplaum yuav qhia tau tias kev ua haujlwm tsis txaus lossis tsis txaus- ua tiav.
II. Plating Thickness: Ib qho tseem ceeb Parameter cuam tshuam kev ua tau zoo
Platinum thickness ncaj qha txiav txim siab hnav tsis kam thiab kev pabcuam lub neej. Kev ua haujlwm chrome plating txheej (xws li cov siv rau piston rods thiab kev taw qhia rails) feem ntau yog nruab nrab ntawm 50 thiab 200 micrometers, nrog rau qee qhov siab - thauj khoom mus txog 300 micrometers. Ib txheej plating uas nyias dhau yog yooj yim hnav, poob nws txoj haujlwm tiv thaiv; ib txheej uas tuab heev yuav ua rau tawg los yog tev vim muaj zog sab hauv. Tsis yog-kev kuaj kev puas tsuaj tuaj yeem ua tau siv X-ray fluorescence spectrometry lossis lub ntsuas hlau sib nqus kom ntseeg tau tias qhov tuab ntawm qhov tseem ceeb ua tau raws li cov qauv tsim.
III. Adhesion Test: Core Verification for Preventing Delamination
Tsis muaj zog adhesion ntawm lub plating thiab substrate yog ib qho tseem ceeb ua rau tsis ua hauj lwm thaum ntxov. Cov txheej txheem muaj xws li:
Hla- txiav kev xeem: Siv cov hniav txiav 1mm × 1mm daim phiaj ntawm qhov chaw, siv daim nplaum tshwj xeeb, thiab tom qab ntawd sai sai tev tawm. Saib seb puas muaj tev. Haum rau plating thicknesses tsawg dua 50μm.
Bending Test: Khoov tus qauv 180℃nyob ib ncig ntawm lub mandrel thiab xyuas seb qhov chaw khoov puas tawg lossis tev. Haum rau malleable substrates.
Thermal Shock Test: Thaum tshav kub kub rau 200 degree, tuav rau ib lub sij hawm, thiab ces txias sai. Rov ua ob peb zaug thiab saib seb puas muaj bubbling lossis delamination. Simulates stability nyob rau hauv huab mob.
Cov txheej txheem dhau los yog tsis pom tseeb tev, flaking, lossis tawg tawm.
IV. Hardness thiab Abrasion Resistance: Hard Indicators rau Durability
chrome plating txheej yuav tsum muaj siab hardness los tiv thaiv kev sib txhuam thiab hnav. Feem ntau, qhov tawv tawv yuav tsum ncav cuag HRC58 lossis siab dua. Vickers hardness nyob rau hauv thaj tsam ntawm 7355MPa rau 7845MPa muab kev tiv thaiv zoo dua. Thaum kuaj, Vickers lossis Rockwell hardness tester tuaj yeem xaiv raws li cov txheej txheem txheej, kom ntseeg tau tias qhov tob tob tsis tshaj 1/7 txog 1/10 ntawm cov txheej txheej kom tsis txhob cuam tshuam los ntawm substrate. Kev tiv thaiv kev puas tsuaj tuaj yeem raug ntsuas los ntawm kev ntsuas kev sib txhuam los yog kev txhaj tshuaj, sau cov nqi hnav lossis lub sijhawm hnav.
V. Corrosion Resistance: Kev lees paub tseem ceeb rau kev ua haujlwm hnyav
Txawm hais tias chromium nws tus kheej yog corrosion-resistant, micropores thiab kab nrib pleb tseem tuaj yeem ua rau substrate corrosion. Kev kuaj ntsev ntsev yog qhov kev sim siv ntau tshaj plaws, muab cov qauv tso rau hauv 5% sodium chloride atomized ib puag ncig thiab kuaj raws li GB / T 10125 tus qauv. Lub siab - zoo chromium plating txheej yuav tsum tiv taus ntau tshaj 96 teev yam tsis muaj kev xeb; siab- cov ntawv thov kawg xws li cov khoom siv tsheb yuav tsum tau 240 teev lossis ntev dua. Porosity testing can also assess the coating density to prevent the spread of localized corrosion.
VI. Lwm Cov Khoom Siv Ua Haujlwm Tseem Ceeb
Nto Roughness: Rau precision guiding daim ntaub ntawv, Ra tsawg dua los yog sib npaug rau 0.4μm yuav tsum tau; rau siab - daim ntawv thov precision, Ra Tsawg dua los yog sib npaug rau 0.1μm yuav tsum tau tswj, uas tuaj yeem ntsuas tau siv qhov profileometer.
Ncaj thiab kam rau ua: Thaum siv nyob rau hauv linear bearings, qhov dabtsi yog khoov ib meter yuav tsum tsawg tshaj li 0.1 hli los xyuas kom meej kev ua haujlwm du.
Hydrogen Embrittlement Risk Control: Cov txheej tuab tuaj yeem yooj yim ua rau hydrogen nkag mus rau hauv cov substrate, txo qis qaug zog. Kev saib xyuas tshwj xeeb yuav tsum tau them rau kev tshem tawm hydrogen, tshwj xeeb tshaj yog rau siab - lub zog steels.
