1.1 Txhawm rau tshem tawm kev ua haujlwm nyuaj thiab rov ua haujlwm dua
Thaum lub sijhawm ua haujlwm txias, cov qauv nplej ntawm cov tooj liab ntshiab yog distorted, elongated, thiab compressed. Dislocations multiply thiab accumulates nyob rau hauv cov hlau, inhibiting ntxiv yas deformation. Raws li qhov tshwm sim, cov khoom yuav nyuaj, lub zog nce, tab sis elongation thiab formability txo qis.
Annealing tshem tawm cov kev cuam tshuam sab hauv thiab txo qis qhov ntom ntom. Nws rov ua dua qhov qub softness thiab ductility ntawm cov tooj liab ntshiab, tso cai rau cov khoom siv los ua cov txheej txheem txias txias xws li kev sib sib zog nqus nqus, khoov, lossis ntau daim duab kos.
1.2 Txhawm rau txo qis kev ntxhov siab
Loj yas deformation thaum lub sij hawm ua hauj lwm txias qhia siab residual kev nyuaj siab nyob rau hauv lub tooj liab tivthaiv.
Cov kev ntxhov siab no tuaj yeem ua rau ntau yam teeb meem:
Dimension instability thiab warping thaum lub sij hawm cia los yog siv
Kev nyuaj siab corrosion cracking los yog deformation hauv machining tom ntej
Txo qaug zog ua haujlwm
Los ntawm cua sov mus rau qhov tsim nyog kub, atomic txav yog kho kom zoo, thiab cov kev ntxhov siab seem yog maj mam tso tawm. Annealing zoo stabilizes cov duab thiab loj ntawm cov ntshiab tooj liab qhov chaw.
1.3 Txhim kho hluav taws xob thiab thermal conductivity
Ntshiab tooj liab yog dav siv nyob rau hauv hluav taws xob thiab thermal daim ntaub ntawv vim nws high conductivity. Txias deformation distors cov siv lead ua lattice thiab nce electron tawg, me ntsis txo hluav taws xob thiab thermal conductivity.
Recrystallization annealing tsim cov qauv tshiab, tsis tu ncua, thiab tsis muaj qhov tsis xws luag. Qhov no txhim kho cov txheej txheem sab hauv purity thiab optimizes hluav taws xob thiab thermal conductivity, uas yog tshwj xeeb tshaj yog tseem ceeb rau conductors, busbars, cables, thiab tshav kub exchangers.
1.4 Txhawm rau txhim kho cov qauv qoob loo thiab txhim kho qhov sib xws
Kev ua haujlwm hnyav hnyav ncab cov nplej rau hauv cov duab fibrous, ua rau anisotropic mechanical zog. Kev sib xyaw kom zoo ua rau cov khoom siv rov ua dua tshiab, tsim cov tshiab, equiaxed, thiab cov nplej tsis zoo. Qhov no homogenizes lub microstructure thiab mechanical zog, kom ntseeg tau tias kev ua tau zoo ib yam nyob rau hauv kev lag luam kev siv.
