Laser hardeningyog cov txheej txheem kev lag luam siv los ua kom hnav tsis kam, qaug zog, thiab hardness ntawm cov hlau. Nws suav nrog kev tsom mus rau lub zog loj laser beam mus rau qhov chaw ua haujlwm kom ua rau cov cua sov hauv zos sai, yaj, thiab quenching. Tab sis yuav ua li cas raws nraim lub laser hardening lub taub hau, lub ntsiab tivthaiv uas muab lub zog laser, ua hauj lwm los hloov cov hlau lub zog?
Hauv tsab xov xwm no, peb yuav tshuaj xyuas cov khoom ntawm lub taub hau laser hardening, kev sib cuam tshuam ntawm cov nqaj laser thiab hlau nto, thermal thiab metallurgical teebmeem, thiab tag nrho cov txiaj ntsig ntawm kev kho laser hardening. Nyeem rau kom paub seb qhov kev siv thev naus laus zis no tau siv li cas siv lub zog laser meej los txhim kho cov hlau ua haujlwm thiab ua haujlwm ntev.
Cov Cheebtsam ntawm Laser Hardening Head
Lub taub hau laser hardening muaj cov ntsiab lus tseem ceeb uas tsim, ua kom pom tseeb, thiab xa cov teeb ci siab siv laser rau cov hlau qhov chaw. Ntawm no yog cov khoom tseem ceeb thiab lawv txoj haujlwm:
- Laser generator - Ua kom muaj lub zog loj laser beam ntawm qhov xav tau wavelengths, feem ntau nyob rau hauv ntau infrared. Cov lasers uas siv xws li Nd:YAG, diode, thiab fiber ntau lasers.
- Beam xa system - muaj optics zoo li iav thiab lo ntsiab muag uas channel lub laser beam los ntawm qhov system thiab focal lens.
- Focal lens - luv focal ntev optics uas tsom lub nqaj mus rau ib qho me me, siab siv qhov chaw ntawm workpiece.
- Txias qhov system - Tshem tawm cov cua sov tsim tawm hauv lub taub hau kom tswj tau qhov kub thiab txias. Qhov no suav nrog cov dej txias, cua kub exchangers, thiab twj tso kua mis.
- Nozzle thiab dav hlau xa - Muab cov pa pab xws li nitrogen thiab huab cua los tiv thaiv optics thiab thaj chaw yaj.
- Tswj thiab automation - Ua kom tsis muaj zog xws li lub zog, nrawm, thiab qhov chaw loj kom zoo rau daim ntawv thov tawv.
Ua ke, cov ntsiab lus no tso cai rau lub taub hau laser hardening scan thiab kho thaj chaw loj ntawm qhov tseeb thiab nrawm.
Laser Beam Interactions nrog hlau
Thaum lub siab siv lub tshuab nqus laser beam ntaus lub ntsej muag ua haujlwm, lub teeb lub zog yog absorbed nyob rau hauv ib tug nyias txheej txheej. Qhov no tsim cov nyhuv photothermal sai heev nyob rau hauv ib cheeb tsam.
Lub workpiece absorbs lub zog laser thiab heats sai sai rau qhov kub thiab txias mus txog thiab luv luv tshaj lub melting point nyob rau hauv ob peb milliseconds. Qhov no ua rau cov txheej txheej nyias nyias kom yaj mus txog li 1 mm tob.
Lub pas dej me me tom qab ntawd dissipates cua sov rau hauv cov hlau ib puag ncig, ua rau ultrafast quenching thiab cua txias tshaj 1010 degree / s. Qhov no thermal gradient inducesmartensitic microstructural theem transformations uas ua rau kom hardness thiab hnav tsis kam.
Metallurgical teebmeem ntawm Laser Hardening
Lub voj voog nrawm nrawm thiab quenching los ntawm kev ua laser hloov cov hlau microstructure uas twb muaj lawm nrog ob peb lub zog hardening:
- Ceev ceev solidification los ntawm yaj cov ntaub ntawv zoo metastable martensitic theem nyob rau hauv cov txheej txheem kho uas nyuaj heev thiab ruaj.
- Cov cua txias nrawm nrawm tsim cov theem softer xws li ferrite thiab pearlite uas txo lub zog.
- Cov kua nplaum muaj zog nce ntxiv vim carbides dissolving rau hauv austenite ua ntej quenching.
- Me me martensite grain loj tshwm sim los ntawm kev ua kom txias sai dua piv rau cov qauv quenching, ntxiv hardness ntxiv raws li Hall-Petch kev sib raug zoo.
- Shock hardening tuaj yeem tshwm sim los ntawm compressive stresses induced thermal expansion thiab contraction thaum cua sov thiab txias.
Kev sib xyaw ua ke ntawm cov txheej txheem no tso cai rau laser hardening los ua kom tawv tawv thiab hnav tsis kam 2 txog 10 npaug ntau dua li cov hlau tsis kho.
Cov txiaj ntsig ntawm Laser Hardening Treatment
Piv nrog rau cov txheej txheem hardening zoo li nplaim taws lossis induction hardening, laser hardening muaj ntau yam zoo:
- Nce hardness mus txog 70 HRC nyob ntawm cov hlau alloy
- Kev ua haujlwm nrawm nrawm mus txog 10 npaug sai dua li lwm txoj hauv kev
- Kev tswj xyuas meej ntawm qhov tob hardening ntawm 0 1-1 0 hli los ntawm kev sib txawv ntawm lub zog laser thiab scanning ceev
- Qhov tsawg kawg nkaus distortion vim tsuas yog qhov saum npoo yog rhuab tawm hauv qhov tseem ceeb
- Xaiv hardening ntawm complex geometries los ntawm leej laser beam tso thiab manipulation
- Automated txheej txheem rau cov txiaj ntsig zoo ib yam thiab txhim kho tus nqi ntau lawm
- Cov txheej txheem tsis sib cuag tiv thaiv kev puas tsuaj lossis kev sib kis los ntawm cov khoom siv sib txuas lossis kev sib txuas lus
- Txhim kho qaug zog, tiv thaiv corrosion, thiab kub tsis kam
- Cov txheej txheem huv ib puag ncig tsis muaj cov kuab tshuaj lossis cov roj quenching yuav tsum tau ua
Nrog rau cov txiaj ntsig no, laser hardening ua rau muaj kev xaiv zoo tshaj plaws ntawm qhov tawv tawv kom haum rau cov kev cai tshwj xeeb ntawm txhua daim ntawv thov. Kev lag luam siv cov thev naus laus zis no ntau yam los ntawm tsheb thiab aerospace mus rau kev tsim hluav taws xob, kev ua haujlwm hlau, thiab kev kho mob.
Nyob rau hauv cov ntsiab lus, niaj hnub no lub laser hardening taub hau marshal meej laser zog kom yaj thiab sai quench hlau nto rau harness metallurgical zog mechanisms. Qhov no hloov cov khoom ntawm lub cev ntawm cov khoom kho kom tau raws li qhov xav tau ntawm cov ntawv thov kev lag luam. Kev nkag siab txog yuav ua li cas cov thermal kinetics thiab theem kev hloov pauv tsim cov teebmeem no muab kev pom rau ntau yam thiab qhov zoo ntawm niaj hnub laser hardening.
Xi'an Guosheng Laser Technology Co., Ltd. yog ib lub tuam txhab high-tech tshwj xeeb hauv R & D, tsim thiab muag cov tshuab laser tsis siv neeg cladding, high-speed laser cladding tshuab, laser quenching tshuab, laser vuam tshuab thiab laser 3D tshuab luam ntawv. Peb cov khoom raug nqi zoo thiab muag hauv tsev thiab txawv teb chaws. Yog tias koj txaus siab rau peb cov khoom, thov hu rau peb ntawmbob@gshenglaser.com.