Vim muaj coob tus impurities nyob rau hauv cov hlau thaum lub sij hawm mining, nws lub cev thiab tshuaj muaj zog tsis ruaj tsis khov nyob rau hauv kev siv. Los ntawm kev kho cua sov, nws tuaj yeem ua kom huv si zoo thiab txhim kho nws cov purity sab hauv. Kev kho cua sov thev naus laus zis kuj tseem tuaj yeem txhim kho nws qhov zoo thiab ua kom nws qhov kev siv tiag tiag. Kev kho cua sov thev naus laus zis hais txog cov txheej txheem uas cov khoom ua haujlwm tau muab tso rau hauv qee qhov nruab nrab rau cua sov thiab ncav cuag qhov kub thiab txias. Tom qab khaws cia ntawm qhov kub thiab txias rau ib lub sijhawm, cov khoom ua haujlwm txias txias ntawm qhov sib txawv.
Daim duab piav qhia (50 lo lus feem ntau)
Raws li ib qho ntawm cov txheej txheem kev kho mob tseem ceeb tshaj plaws hauv kev tsim cov khoom siv, cov cuab yeej siv hluav taws xob kho cua sov muaj txiaj ntsig zoo piv nrog lwm cov txheej txheem ua haujlwm. Hauv kev kho cua sov hlau, "plaub hluav taws" xa mus rau annealing, normalizing, quenching (kev daws) thiab tempering (aging). Thaum lub workpiece yog rhuab mus rau ib tug tej yam kub, txawv tuav lub sij hawm yog siv raws li qhov loj thiab cov khoom ntawm lub workpiece, thiab ces lub workpiece yog txias maj mam. Qhov no yog hu ua annealing. Lub hom phiaj tseem ceeb ntawm annealing yog kom tsim nyog txo cov hardness ntawm cov khoom, txhim kho cov yas ntawm cov khoom, pab txhawb kev ua haujlwm tom qab, txo cov kev ntxhov siab, thiab sib npaug ntawm cov khoom sib xyaw thiab cov qauv ntawm cov khoom.
Daim duab piav qhia (50 lo lus feem ntau)
Mechanical processing yog ib qho kev siv tshuab uas siv cov cuab yeej siv tshuab los ua cov khoom. Mechanical processing yuav ua cov txheej txheem kev kho cua sov ua ntej thiab tom qab kev ua haujlwm. Nws txoj haujlwm yog:
1. Tshem tawm qhov kev ntxhov siab sab hauv ntawm qhov khoob. Nws yog tsuas yog siv rau castings, forgings thiab weldments.
2. Txhim kho cov txheej txheem ua kom cov ntaub ntawv yooj yim rau kev ua haujlwm. Xws li annealing, normalizing, thiab lwm yam.
3. Txhim kho cov cuab yeej cuab tam ntawm cov khoom siv hlau. Piv txwv li, quenching thiab tempering kho.
4. Nws tuaj yeem txhim kho qhov hardness ntawm cov ntaub ntawv. Piv txwv li, quenching, carburizing quenching, thiab lwm yam
Yog li ntawd, ntxiv rau kev xaiv cov khoom tsim nyog thiab ntau yam txheej txheem, kev kho cua sov feem ntau yog qhov tseem ceeb.
Kev kho cua sov feem ntau tsis hloov cov duab thiab tag nrho cov tshuaj muaj pes tsawg leeg ntawm lub workpiece, tab sis endows los yog txhim kho kev ua hauj lwm ntawm lub workpiece los ntawm kev hloov lub internal microstructure ntawm lub workpiece los yog hloov cov tshuaj muaj pes tsawg leeg ntawm lub workpiece nto. Nws feature yog los txhim kho lub sab hauv zoo ntawm lub workpiece, uas yog feem ntau tsis pom ntawm qhov muag liab qab.