Kev kho cua sov ntawm cov hlau feem ntau suav nrog quenching, tempering thiab annealing.Kev kho cua sov ntawm cov hlau cuam tshuam cov khoom ntawm cov khoom siv hlau.
1, Quenching: Quenching yog kom sov cov hlau mus rau 800-900 degrees, khaws cia rau ib lub sijhawm, thiab tom qab ntawd maj mam txias nws hauv dej lossis roj, uas tuaj yeem txhim kho qhov tawv thiabhnav tsis kam ntawm cov hlau, tab sis nce lub brittleness ntawm cov hlau.
Tus nqi cua txias txiav txim siab quenching nyhuv.Qhov txias dua, qhov siab dua qhov hardness thiab hnav tsis kam ntawm cov hlau, tab sis qhov ntau dua qhov brittleness.Cov cuab yeej quenching ntawm steel nce nrog nce cov ntsiab lus carbon.Cov hlau nrog cov ntsiab lus carbonqis dua 0.2% tsis tuaj yeem quenched thiab hardened.
Thaum cov yeeb nkab yog welded nrog flange, lub tshav kub nyob ze ntawm lub vuam yog sib npaug rau quenching, uas yuav ua rau hardening.Txawm li cas los xij, cov pa roj carbon tsawg nrog cov ntsiab lus tsawg dua 0.2% yuav tsis hardened los ntawm quenching, uas yog ib qho ntawm cov laj thawj vim li cas cov pa roj carbon tsawg muaj qhov zoo weldability.
2. Tempering: Cov hlau quenched yog ib qho nyuaj thiab nkig, thiab nws kuj ua rau muaj kev ntxhov siab sab hauv.Txhawm rau txo cov tawv nqaij tawv no thiab tshem tawm cov kev ntxhov siab sab hauv, cov hlau quenched feem ntau yog cua sov kom qis dua 550 ° C, thiab tom qab ntawd txias tom qab kev txuag hluav taws xob los txhim kho cov tawv thiab plasticity ntawm cov hlau thiab ua tau raws li qhov yuav tsum tau siv.
3. Annealing: Txhawm rau txo cov tawv nqaij thiab txhim kho cov yas ntawm cov hlau, pab txhawb kev ua haujlwm, lossis tshem tawm cov tawv brittleness thiab kev ntxhov siab sab hauv tsim thaum lub caij txias thiab vuam, cov hlau tuaj yeem ua kom sov rau 800-900 degrees, thiab maj mam txias tom qab kev txuag hluav taws xob. ua tau raws li qhov yuav tsum tau siv.Piv txwv li, cov hlau dawb annealed ntawm 900-1100 degrees tuaj yeem txo qhov hardness thiab brittleness thiab tau txais cov malleability.
Post lub sij hawm: Nov-24-2022