Thaum lub sijhawm ua cov txheej txheem calcination, lub tshuab microscopic uas "overburning" ua rau txo qis qhov ceev tiag tiag yog feem ntau cuam tshuam nrog cov ciam teb oxidation lossis yaj, kev loj hlob tsis zoo ntawm cov noob, thiab kev puas tsuaj ntawm cov qauv, raws li tau soj ntsuam ntxaws hauv qab no:
- Kev oxidation lossis yaj ntawm ciam teb ntawm cov noob: Kev poob ntawm lub zog sib txuas ntawm cov noob
Kev tsim cov theem eutectic uas yaj tsawg: Thaum qhov kub ntawm calcination tshaj qhov chaw yaj ntawm cov eutectics uas yaj tsawg hauv cov khoom siv, cov qauv eutectic ntawm cov ciam teb ntawm cov noob feem ntau yaj, tsim cov theem kua. Piv txwv li, hauv cov hlau txhuas, cov pob zeb rov yaj lossis cov cheeb tsam peb ceg rov yaj yuav tsim, thaum nyob rau hauv cov hlau carbon, cov ciam teb ntawm cov noob oxidation lossis cov yaj hauv zos yuav tshwm sim.
Kev Nkag Mus Rau Hauv Cov Pa Oxidizing: Thaum kub siab, cov pa oxidizing (xws li oxygen) kis mus rau cov ciam teb ntawm cov noob thiab ua rau muaj cov khoom hauv cov khoom, ua rau muaj cov oxides. Cov oxides no ua rau lub zog sib txuas ntawm cov noob tsis muaj zog, ua rau cov noob sib cais.
Kev puas tsuaj rau cov qauv: Tom qab cov ciam teb ntawm cov noob yaj lossis oxidation, lub zog sib txuas ntawm cov noob poob qis heev, ua rau muaj cov kab nrib pleb me me lossis cov qhov hauv cov khoom. Qhov no txo qhov hnyav uas siv tau rau ib chav, ua rau qhov ceev tiag tiag txo qis. - Kev loj hlob ntawm cov noob tsis zoo: Kev nce ntxiv ntawm cov qhov tsis zoo sab hauv
Cov nplej zom vim yog kub dhau: Kev kub hnyiab ntau dhau feem ntau nrog rau kev kub dhau, qhov twg qhov kub thiab txias siab dhau lossis lub sijhawm tuav ntev ua rau cov nplej austenite loj hlob sai. Piv txwv li, cov hlau carbon yuav tsim cov qauv Widmanstätten tom qab kub dhau, thaum cov hlau cuab yeej yuav tsim cov ledeburite zoo li pob txha ntses.
Kev nce ntxiv ntawm cov qhov tsis zoo sab hauv: Cov noob nplej ntxhib yuav muaj ntau qhov tsis zoo xws li kev tawg thiab qhov khoob, uas ua rau cov khoom siv tsis ntom. Tsis tas li ntawd, cov qhov roj lossis cov kab nrib pleb me me yuav tshwm sim thaum lub sijhawm loj hlob ntawm cov noob, ua rau qhov hnyav ib chav tsev txo qis.
Txo qhov hnyav uas siv tau: Kev loj hlob ntawm cov noob tsis zoo ua rau cov qauv sab hauv xoob hauv cov khoom siv, txo qhov hnyav uas siv tau ib chav thiab ua rau qhov ceev tiag tiag txo qis. - Kev puas tsuaj rau cov qauv me me: Kev puas tsuaj ntawm cov khoom siv
Cov pob zeb uas yaj dua thiab cov cheeb tsam uas yaj dua peb ceg: Hauv cov hlau txhuas thiab lwm yam khoom siv, kev hlawv ntau dhau tuaj yeem ua rau muaj cov pob zeb uas yaj dua lossis cov cheeb tsam uas yaj dua peb ceg ntawm cov ciam teb noob. Qhov muaj cov cheeb tsam no cuam tshuam cov khoom siv txoj kev sib txuas thiab ua rau muaj porosity ntau ntxiv.
Kev nthuav dav ntawm ciam teb ntawm cov noob thiab cov kab nrib pleb me me: Tom qab kub hnyiab dhau, cov ciam teb ntawm cov noob yuav nthuav dav vim yog kev oxidation lossis yaj, nrog rau kev tsim cov kab nrib pleb me me. Cov kab nrib pleb me me no tuaj yeem nkag mus rau hauv cov khoom, ua rau qhov ceev tiag tiag txo qis.
Kev tsis rov qab tau ntawm cov khoom: Qhov kev puas tsuaj me me ntawm cov qauv uas tshwm sim los ntawm kev kub hnyiab ntau dhau feem ntau tsis rov qab tau, thiab txawm tias kev kho cua sov tom qab ntawd kuj yuav tsis rov qab tau tag nrho cov khoom qub.
Piv txwv thiab kev txheeb xyuas
Kev Kub Hnyiab Ntau Dhau ntawm Cov Hlau Aluminium: Thaum qhov kub ntawm cov hlau aluminium alloys kub tshaj qhov kub eutectic uas yaj tsawg, cov ciam teb ntawm cov noob yuav ntxhib lossis yaj, tsim cov pob zeb rov yaj lossis cov cheeb tsam peb ceg rov yaj. Qhov muaj cov cheeb tsam no ua rau cov khoom siv qhov ceev tiag tiag txo qis thaum ua rau cov khoom siv kho tshuab poob qis.
Kev Kub Hnyiab Ntau Dhau ntawm Cov Hlau Carbon: Tom qab kub hnyiab ntau dhau, cov hlau carbon yuav tsim cov khoom xws li hlau oxide lossis manganese sulfide ntawm cov ciam teb ntawm cov noob, uas ua rau lub zog sib txuas ntawm cov noob tsis muaj zog thiab ua rau cov noob sib cais. Tsis tas li ntawd, kev kub hnyiab ntau dhau yuav ua rau muaj cov qauv Widmanstätten, ua rau cov khoom ntom ntom dua.
Lub sijhawm tshaj tawm: Plaub Hlis-27-2026