Muaj teeb meem nrog lub plhaub ci rauv taws

Lub plhaub ci rauv tuaj yeem hloov lub microstructure ntawm hlau los ntawm kev kho cua sov, yog li txhim kho nws cov kev ua tau zoo. Kev kho cua sov tuaj yeem txhim kho cov cuab yeej cuab tam ntawm cov hlau thiab txuas ntxiv lub neej kev pab cuam ntawm lub tshuab qhov chaw. Txoj kev kho cua sov tsim nyog tuaj yeem tshem tawm ntau yam tsis xws luag los ntawm cov txheej txheem ua haujlwm kub xws li casting, forging, thiab vuam, ua kom zoo nplej, tshem tawm kev sib cais, txo cov kev ntxhov siab sab hauv, thiab ua rau cov qauv thiab cov khoom ntawm cov hlau zoo ib yam.
Lub hom phiaj tseem ceeb ntawm lub plhaub ci rauv yog dab tsi? Dab tsi yog qhov feem ntau siv annealing ua haujlwm hauv kev tsim khoom? Txheeb xyuas qhov kev thov ntawm kev ua haujlwm annealing.
Yog vim li cas: (1) Kev sib koom ua ke ntawm cov tshuaj muaj pes tsawg leeg thiab cov qauv ntawm cov hlau, ua kom cov nplej loj, kho cov tawv tawv, tshem tawm cov kev ntxhov siab sab hauv thiab ua haujlwm tawv, txhim kho kev ua haujlwm ntawm cov hlau, thiab npaj cov microstructure rau tom qab quenching.
(2) Feem ntau siv annealing ua haujlwm hauv kev tsim khoom muaj xws li ua tiav annealing, isothermal annealing, spheroidizing annealing, thiab kev ntxhov siab annealing.
(3) Ua kom tiav annealing thiab isothermal annealing yog siv rau castings, forgings, thiab kub dov profiles ntawm carbon steel thiab alloy steel nrog hypoeutecoid steel muaj pes tsawg leeg. Qee lub sij hawm kuj siv rau vuam cov qauv. Spheroidizing annealing yog tsuas yog siv rau carbon steel thiab hlau alloy nrog eutectoid los yog hypereutectoid compositions. Kev ntxhov siab kev ntxhov siab feem ntau yog siv los tshem tawm cov kev ntxhov siab sab hauv hauv castings, forgings, welded qhov chaw, txias stamped qhov chaw (los yog txias qhov chaw), thiab machining.
Dab tsi yog spheroidization annealing? Vim li cas eutectoid hlau yuav tsum tau spheroidization annealing es tsis txhob ua kom tiav annealing?
Yog vim li cas: (1) Ua kom sov cov hlau qhov chaw rau 30-50 degree saum AC1, ua kom sov rau ib lub sijhawm, thiab maj mam txias rau 600 degree nrog rau lub cub tawg ua ntej tso tawm rau cua txias.
(2) Thaum lub microstructure ntawm hypereutectoid hlau yog tsim los ntawm txheej carbides thiab network thib ob carbides, tsis tsuas yog hardness siab thiab nyuaj rau txiav, tab sis kuj lub brittleness ntawm cov hlau yog nce, uas yog feem ntau quenching deformation thiab cracking. Los ntawm spheroidizing annealing, cov txheej thiab network carbides tau hloov mus rau hauv spherical carbides kom txo hardness, ua tau zoo microstructure, thiab txhim kho machinability.