Cov ntaub ntawv xav tau ua ntej-Kev kho cua sov ua ntej txheej txheem Laser Cladding
I.Introduction: Qhov yuav tsum tau ua ua ntej-Kev kho cua sov hauv Laser Cladding
Laser cladding yog ib qho kev hloov kho saum npoo av zoo heev uas tsim tau lub siab -kev ua tau zoo metallurgical bonding txheej ntawm lub substrate nto los ntawm melting cladding cov ntaub ntawv thiab substrate nto nrog lub siab - lub zog laser beam. Txawm li cas los xij, rau qee yam khoom siv, ncaj qha Laser Claddingyam tsis muaj ua ntej-kev kho cua sov feem ntau ua rau muaj qhov tsis xws luag xws li tawg, qhov hws, lossis kev sib txuas tsis zoo hauv txheej txheej cladding. Ua ntej- kev kho cua sov feem ntau txo qhov kub ntawm qhov sib txawv ntawm thaj tsam cladding thiab cov substrate, alleviates thermal stress generated thaum lub sij hawm cua kub ceev thiab txias txheej txheem, thiab txhim kho cov microstructure thiab mechanical zog ntawm lub substrate, yog li nteg lub hauv paus ruaj khov rau siab - zoo cladding. Kev xaiv cov ntaub ntawv uas xav tau ua ntej- kev kho cua sov yog ze ze rau lawv cov tshuaj muaj pes tsawg leeg, cov ntsiab lus carbon, thiab thermal conductivity.
Ⅱ.Main Categories of Materials Requiring Pre-Kev kho cua sov
High-carbon thiab siab- alloy steels yog cov ntaub ntawv tseem ceeb uas tswj hwm ua ntej- kho cua sov ua ntejLaser Cladding. Cov hlau uas muaj cov ntsiab lus carbon siab dua 0.4%, xws li 45 # steel, T10 cov cuab yeej hlau, thiab ntau yam hlau hlau uas muaj chromium, molybdenum, lossis vanadium, muaj cov thermal conductivity tsis zoo thiab hardenability siab. Thaum lub sij hawm ncaj qha laser cladding, qhov kub ceev nce thiab poob yuav ua rau thermal stress nyob rau hauv lub substrate, yooj yim inducing kab nrib pleb nyob rau hauv ob qho tib si cladding txheej thiab tshav kub - cuam tshuam cheeb tsam. Tsis tas li ntawd, cam khwb cia hlau, tshwj xeeb tshaj yog siab -chromium cam khwb cia hlau thiab nodular cam khwb cia hlau, kuj yuav tsum tau ua ntej - cua sov. cam khwb cia hlau muaj graphite theem nrog kev faib tsis sib npaug, thiab qhov siab - laser irradiation tau yooj yim ua rau graphite oxidation thiab ntim nthuav dav, ua rau muaj kev ntxhov siab sab hauv; ua ntej-kev kho cua sov tuaj yeem ua kom qhov kub thiab txias thiab txo qhov kev pheej hmoo. Qee cov hlau refractory thiab lawv cov alloys, xws li titanium alloys thiab npib tsib xee-raws li superalloys siv nyob rau hauv aerospace teb, kuj yuav tsum tau tsim nyog pre{14}}kev kho cua sov vim lawv rhiab heev rau thermal shock.
Ⅲ.Qhov tseem ceeb ntawm Pre-Kev kho cua sov rau Cladding Quality
Rau cov ntaub ntawv hais saum toj no, ua ntej- kev kho cua sov tsis yog txheej txheem xaiv tab sis yog qhov tseem ceeb rau kev ua tiav ntawmLaser Cladding. Kev tsim nyog ua ntej- cua sov tuaj yeem tsis tsuas yog tiv thaiv kev tsim cov kab nrib pleb thiab lwm yam tsis xws luag tab sis kuj tseem txhim kho lub wettability ntawm cov hmoov cladding ntawm lub substrate nto, txhawb kev tsim cov hlau nplaum sib txuas sib txuas. Ntxiv mus, ua ntej- kev kho cua sov tuaj yeem kho cov substrate microstructure, txo qhov sib txawv ntawm hardness ntawm cladding txheej thiab cov substrate, thiab txhim khu lub zuag qhia tag nrho hnav tsis kam, corrosion kuj, thiab qaug zog tsis kam ntawm cladded ib feem. Nws yuav tsum raug sau tseg tias qhov ua ntej - kub thiab tuav lub sij hawm yuav tsum tau tswj kom meej raws li cov khoom siv tshwj xeeb thiab qhov loj me; ntau dhau ua ntej- cua sov tuaj yeem ua rau cov qoob loo loj hlob ntawm cov substrate, thaum tsis txaus ua ntej- cua sov tsis tuaj yeem ua tiav qhov kev xav tau kev ntxhov siab.