Cov txheej txheem los tiv thaiv oxidative decarburization ntawm sim hluav taws xob rauv cov khoom ua haujlwm

1. Txheej txheej txheej

Cov txheej txheem ntawm txheej muab tshuaj txhuam rau ntawm qhov chaw ntawm lub workpiece yog tus nqi qis, yooj yim hauv kev ua haujlwm, thiab tsis tas yuav tsum muaj cov cuab yeej tshwj xeeb.

Txawm hais tias txoj kev siv cov tshuaj txhuam hniav yog qhov yooj yim thiab yooj yim, muaj qhov txaus ntshai ntawm kev tawg thiab tev tawm ntawm cov tshuaj txhuam thaum lub sij hawm cua sov, uas tseem yuav ua rau oxidation hauv zos thiab decarburization. Nyob rau tib lub sijhawm, cov tshuaj nplaum muaj nyob rau saum npoo ntawm lub workpiece, uas yuav cuam tshuam rau qhov zoo ntawm quenching, thiab quenched workpiece tsis yooj yim los ntxuav. Thiab, cov khoom ua haujlwm coated nrog muab tshuaj txhuam yuav tsim kom muaj pa taws ntau thaum cua sov, uas yuav cuam tshuam rau kev siv lub tshuab hluav taws xob.

2. Charcoal hmoov npog

Siv charcoal hmoov, los yog ntxiv cov nyiaj tsim nyog ntawm cov ntaub ntawv hlau thiab slag (grain loj 1 ~ 4mm) rau cov hmoov txhuam hniav ua cov tshuaj tiv thaiv, npog cov khoom ua haujlwm thiab ua kom sov rau hauv qhov cub, uas tuaj yeem tiv thaiv cov khoom ua haujlwm los ntawm oxidizing decarburization cov tshuaj tiv thaiv. Txoj kev no yog qhov yooj yim thiab yooj yim rau kev siv, thiab tus nqi qis, tab sis lub sijhawm cua sov yuav tsum tau txuas ntxiv kom tsim nyog.

3. Kev tiv thaiv tshwj xeeb-puab workpieces

Rau qee qhov tshwj xeeb-zoo li tus workpieces, nws yog ib qho nyuaj rau tiv thaiv oxidative decarburization los ntawm paste txheej los yog charcoal hmoov txheej. Nyob rau lub sijhawm no, qee qhov nyiaj ntawm charcoal hmoov tuaj yeem muab tso rau hauv lub qhov cub nrog lub tais, thiab tom qab ntawd qhov kub ntawm lub cub tawg tuaj yeem nce mus rau qib siab dua. Qhov kub yuav tsum siab tshaj 30 ~ 50 ℃, yog li cov hluav taws xob sib cuam tshuam nrog huab cua los tsim kom muaj cov pa roj carbon ntau txaus, kom cov pa roj hauv lub cub tawg nyob rau hauv qhov nruab nrab, thiab tom qab ntawd cov khoom tshwj xeeb raug thauj khoom, uas tuaj yeem txo lossis tiv thaiv qhov tshwm sim ntawm oxidative decarburization.