Stainless hlau yog cov khoom siv tshuaj siv nyob rau hauv ntau yam kev siv vim nws qhov kev tiv thaiv corrosion, kub oxidation tsis kam, thiab lub zog. Kev sib koom ua ke ntawm cov hlau tsis sib xws ntawm cov txheej txheem vuam siv hluav taws xob siab yog nyiam dua lwm txoj hauv kev vuam lossis adhesion hauv ntau lub tsheb, kev kho mob, thiab tub rog thiab aerospace (MIL / AERO) daim ntawv thov vim laser welded pob qij txha muab lub zog siab tshaj plaws thiab ntau yam. cov txiaj ntsig. Cov no suav nrog:
Me me HAZ cheeb tsam:Stainless hlau pob qij txha feem ntau yuav tsum tsis yog tsuas yog muaj zog tab sis feem ntau kom zoo nkauj huv si. Lub laser muaj qhov tsawg tshaj plaws tshav kub cuam tshuam cheeb tsam, los yog "HAZ." Qhov no kuj ua rau laser vuam zoo tagnrho rau cov khoom uas muaj intricate weld qauv, los yog qhov chaw uas yuav tsum tau welded yog nyuaj mus cuag. Vim tias lub laser beam tuaj yeem tsom mus rau qhov tseeb, tsis tshua muaj qhov ua rau puas tsuaj, pitting, lossis deforming qhov chaw nyob ib puag ncig, thiab.
Cov txheej txheem huv:Vim hais tias kev lag luam laser vuam tsuas yog kev sib txuas ntawm cov hlau, muaj (feem ntau) tsis xav tau cov ntaub ntawv muab tub lim, thiab tsis muaj kev pheej hmoo ib puag ncig ntxiv. Qhov no feem ntau ua rau laser vuam qhov kev xaiv zoo tshaj plaws thiab tus phooj ywg zoo. Thiab nyob rau hauv qhov kawg cov khoom, xws li stainless hlau raj siv nyob rau hauv cov khoom siv kho mob thiab kev phais daim ntawv thov, lub laser tag nrho huv si xyuas kom meej cov khoom raug xa dawb ntawm cov kab mob thiab burrs.
Tsawg corrosion:Hauv cov pa TIG lossis MIG welding, cov electrode siv rau vuam muaj cov kab dej noo. Qhov kub ntawm cov vuam ua rau cov dej decompose sai, thiab ua li ntawd, nws tso tawm hydrogen uas nkag mus rau hauv cov hlau ua rau nws tsis yooj yim. Vim hais tias laser vuam tsis cia siab rau lub electrode los ua cua sov, tsis muaj kev pheej hmoo ntawm tus kheej-inflicted corrosion.
Precision:Lub zog tso zis, qhov loj ntawm qhov vuam, qhov tob ntawm qhov vuam, qhov nrawm ntawm vuam, thiab kev khiav ntawm lub laser beam ntawm stainless hlau nto yog tag nrho cov tswj tau heev. Qhov tshwm sim yog ib tug meej heev weld. Cov ntawv nyias nyias ntawm stainless kuj tuaj yeem ua laser welded vim qhov kev tswj kom zoo.
Txo Thermal Distortion:Ib qho txiaj ntsig ntxiv los ntawm laser welding stainless hlau yog txo thermal distortion thiab residual stresses thaum piv rau cov pa vuam cov txheej txheem. Qhov no yog qhov tshwj xeeb tshaj yog rau cov hlau tsis muaj steel uas muaj 50% ntau dua thermal expansion dua li cov pa roj carbon steel.
Automation:Lwm qhov txiaj ntsig ntawm cov txheej txheem tswj tau zoo yog tias laser vuam yog qhov programmable thiab robotic heev. Txij li nws yooj yim dua rau automate piv rau hlau inert gas (MIG) * lossis tungsten inert gas (TIG) * txoj kev vuam, ntau dua rov ua dua thiab nrawm dua tuaj yeem ua tiav.
Nkag siab txog 4 hom khoom siv stainless hlau
Stainless hlau tau piav qhia raws li cov khoom siv ntawm txhua hom. Cov no yog cov kev xav ntawm laser vuam thiab yuav tsum tau rau txhua tus.
Austenitic stainless hlau
300 series ntawm stainless hlau yog austenitic stainless hlau. Cov hlau stainless no yog siv rau hauv cov ntawv thov uas xav tau kev tiv thaiv corrosion thiab toughness, thiab thaum muaj teeb meem cuam tshuam txog thermal distortion yog xav txog. 300 series stainless hlau tuaj yeem pom nyob rau hauv ntau yam kev siv hauv roj av, kev thauj mus los, tshuaj lom neeg, thiab kev lag luam tsim hluav taws xob. Cov hlau tsis muaj steel no tshwj xeeb tshaj yog muaj txiaj ntsig zoo nyob rau hauv qhov chaw kub kub. Qhov no series ntawm stainless hlau yog haum rau ob leeg pulsed thiab nruam yoj (CW) laser vuam. Laser welding stainless hlau muab me ntsis zoo dua weld nkag qhov tob thiab nce vuam ceev thaum piv rau cov hlau tsis tshua muaj vim qhov qis thermal conductivity ntawm feem ntau austenitic stainless hlau. Kev nrawm dua los ntawm laser vuam kuj tseem muaj txiaj ntsig zoo hauv kev txo qis kev cuam tshuam rau corrosion los ntawm nag lossis daus ntawm chromium carbides ntawm cov ciam teb. Chromium carbides nag lossis daus tuaj yeem tshwm sim thaum cov cua kub nkag siab dhau thaum lub sijhawm vuam txheej txheem.
Ferritic stainless hlau
Lub ferritic 400 series ntawm stainless hlau feem ntau muaj me ntsis kom tsis muaj npib tsib xee thiab tsis muaj zoo li laser weldability thaum piv rau cov qib austenitic. Laser vuam cov qib ferritic stainless hlau nyob rau hauv qee kis, impairs sib koom tes toughness thiab corrosion kuj. Qhov kev txo qis hauv cov tawv nqaij yog ib feem ntawm kev tsim cov pob zeb ntxhib hauv thaj chaw uas muaj kev kub ntxhov thiab kev tsim martensite, uas tshwm sim hauv cov qib siab carbon cov ntsiab lus. Lub tshav kub-tshuaj tiv thaiv tej zaum yuav muaj ib tug hardness ntau dua vim lub ceev ceev ceev, uas ua rau kom lub brittleness.
Martensitic stainless hlau
The martensitic 400 series of stainless steel is more challenging to laser weld than the austenitic and ferritic grades. Laser welding high carbon martensitic grades (>{{0}}.15% carbon) tuaj yeem ua rau cov khoom nkig hauv thaj chaw uas muaj cua sov. Yog hais tias martensitic stainless hlau nrog cov ntsiab lus carbon saum toj no 0.1% yuav tsum tau welded, ces siv cov khoom siv austenitic stainless hlau muab tub lim tuaj yeem txhim kho qhov tawv tawv thiab txo qhov cuam tshuam rau kev tawg tab sis tsis tuaj yeem txo qhov brittleness nyob rau hauv tshav kub-cuam tshuam cheeb tsam. Ua ntej cua sov cov khoom ua ntej welding los yog tempering cov khoom ntawm 650-750 degree tom qab laser vuam yuav pab kom txo tau cov brittleness nyob rau hauv lub tshav kub-cuam tshuam cheeb tsam.
Duplex stainless hlau
Duplex stainless hlau yog sib xyaw ntawm austenitic-ferritic stainless hlau. Cov hlau tsis muaj hlau no yog tus cwj pwm los ntawm ob-theem microstructure uas muaj austenite thiab ferrite. Lub volumetric feem ntawm austenite thiab ferrite yog roughly sib npaug. Lub ntsiab alloying ntsiab yog chromium, nickel, thiab molybdenum. Duplex stainless hlau feem ntau kuj yog alloyed nrog me me ntawm nitrogen. Cov khoom siv duplex feem ntau yog weldable nrog cov txiaj ntsig zoo.