Laser cladding cov ntaub ntawv yuav tsum raug xaiv raws li txoj kev sib txuam ntawm qhov kev xav tau ntawm kev ua haujlwm thiab cladding matrix.
Hauv qee qhov chaw ua haujlwm, muaj cov txheej txheej ua kom zoo rau cov npliag rau qee qhov substrate. Tam sim no, seb cov khoom siv txheej puas muaj qhov sib txuam zoo tau dhau los ua lub ntsiab lus tseem ceeb ntawm laser cladding thev naus laus zis.
Tus qauv tsim thiab xaiv ntawm laser cladding cov ntaub ntawv tsuas yog xav txog yam hauv qab no:
01. Cov kab sib txuas loj tshaj tawm yog sib npaug. Ib qho ntawm cov laj thawj tseem ceeb rau kev tawg nyob rau hauv laser cladding txheej yog qhov sib txawv ntawm linear expansion coefficient ntawm cov khoom siv cladding thiab lub hauv paus hlau. Yog li, qhov sib txuam ntawm linear expansion coefficient ntawm cladding txheej thiab substrate yuav tsum raug txiav txim siab ua ntej thaum xaiv cov khoom cladding. Txoj kab sib tshooj nthuav dav txheej ntawm txheej cladding txheej thiab cov txheej hauv qab yog qhov sib txuam zoo, uas tuaj yeem txhim kho qhov kev sib txuas ntawm lub zog, thermal kev co tsis kam, kev pib tawg thiab muaj peev xwm tshaj tawm. Yog tias linear expansion coefficient ntawm ob yog txawv dhau, txheej cladding yooj yim rau pob, tawg thiab txawm tev thaum lub sijhawm laser cladding.
02. Melting point txuam: cov txheej txheej nrog cov khoom sib xyaw kom haum melting taw tes txheeb ze rau cov substrate yuav tsum tau siv rau hauv laser cladding. Ntawd yog hais, lub ntsiab lus melting ntawm lub hauv paus hlau ntawm cov khoom siv cladding yuav tsum tsis txhob sib txawv, txwv tsis pub nws nyuaj rau txheej txheej txheej txheej txheej nrog cov xim hlau zoo thiab dilution degree nrog lub substrate, cladding zoo yuav raug txo kom tsawg, thiab cov xim hlau zoo sib txuas tsis tau tsim. Nyob rau hauv dav dav, yog hais tias lub melting kis ntawm laser cladding cov khoom yog siab dhau heev thiab lub teeb meem melting ntawm laser cladding cov khoom yog tsawg dua thaum cua sov, lub saum npoo roughness ntawm txheej yuav ntau, los yog lub siab lub teeb ntawm cladding txheej yuav tau nce vim ntau lub teeb meem melting. ntawm substrate nto, thiab txheej cladding yuav hnyav paug; yog tias lub ntsiab lus melting ntawm cov khoom siv cladding tsawg dhau, cov kab noj hniav thiab cov koom ua ke yuav tsim nyob rau hauv txheej txheej vim ntau cov khoom siv ntau dhau ntawm cov khoom cladding, lossis txheej saum npoo ntawm cov hlau tsis yooj yim nws yog qhov nyuaj rau kev ua ib qho kev sib koom tes ntawm cov txheej cladding thiab lub substrate vim melting zoo. Yog li ntawd, nyob rau hauv laser cladding, cladding cov ntaub ntawv nrog qhov zoo sib xws taw tes rau lub hauv paus hlau feem ntau xaiv.
03. Lub ntub dej ntawm cov khoom siv cladding mus rau txheej txheej yuav tsum tsis txhob tsuas xav txog cov khoom thermophysical ntawm cov khoom cladding, tab sis kuj xav txog nws qhov kev npliag thiab tshuaj lom neeg ruaj khov nyob rau hauv cov laser ceev ceev, lub ntub dej ntawm cov theem tawv thiab cov theem sib khi ntawm cov hlau, thiab cov theem hloov pauv yam ntxwv ntawm qhov kub thiab txias ceev ceev. Wettability tseem yog qhov tseem ceeb hauv txheej txheem cladding. Hauv kev tshwj xeeb, txhawm rau kom tau txais kev txaus siab cermet txheej, nws yog ib qho tsim nyog yuav tsum xyuas kom meej tias cov hlau ntu thiab cov xeb tau muaj kev ntub dej zoo. Lub ntub dej muaj feem cuam tshuam txog thaj tsam nro ntawm cov ntaub ntawv. Qhov me me ntawm qhov sib haum saum npoo zoo dua, qhov ua tau zoo dua ntawm cov kua ua kua, thiab qhov yooj yim dua yog ua kom cov kua cladding kua tusyees kis tau rau ntawm cov nplaim hlau. Ntawd yog hais, cov khoom siv nrog kev ntub dej zoo tuaj yeem tau txais cov txheej txheej txheej txheej txheej kom zoo rau txheej txheem nyob rau hauv cov txheej txheem laser cladding Cov nplais hluav taws xob ntawm cov khoom siv ntau thiab qhov txo ntawm cov dej-sib cuam tshuam rau lub zog tau sib tham.
