Tsev > Exhibition > Ntsiab lus
Forging los tsis xws luag
Jan 07, 2017
Casting ua tau hlawv yog hais txog cov hlau VOJVOOS cov cua sov sov hauv high school los yog kub cua sov koog tsev kawm ntawv lub sij hawm nyob tau ntev, cua sov cov pa thiab cov lwm oxidation deev roj allergic seeping rau xov lis ntawm txoj kev qhib rau koj dawb xwb, thiab thiab hlau, thiab leej faj, thiab cov pa roj carbon, oxidation, ua tau yooj yim yaj ntawm oxide ntawm tag nrho cov nyiaj siv lead ua , puas muaj lis ntawm rau, ua rau cov khoom uas muaj yas tag txo. Hlawv hlau loj, tshwm sim thaum twg ib tug nias speed, ncab yuav ntab rau deg transverse cracking ntawm cov hluav taws.
Cracking saum nplaim tooj-brittleness nyob hauv lub forging. Thaum pub rau siab magnification, yog daj daj tooj (tooj los yog tau kua) faib raws tus lis Area. Billet cua sov, rauv remnants ntawm tooj liab oxide, thiab revert rau cov dawb tooj liab oxidation ntawm kub hlau, molten hlau raws tus austenite lis ciam Atomic expansion tiv thaiv cov kev txuas ntawm cov nplej. Tsis tas li, rau siab tooj liab ntawv nyob hauv cov hlau [> 2% (huab hwm coj feem)], xws li cua kub hauv oxidizing cua, oxide laj txheej bacteria tooj nplua nuj yuav ua nyob rau hauv daim tawv nqaij, yuav muab hlau nkig.
Kub yus thiab kub thiab txias tsis nruj Area overheating. Feem ntau lis ntab mus rau oxidation deg thiab txiav txim taws yaj ua nta. Rau cov hlau, thiab intergranular melting, tsis yooj yim oxidation thaum tab tom hla hlawv cuab tam steel (HSS, Cr12 steel) thaum twg overburning, lis ciam vim melting thiab ua tus Fishbone ledeburite. Txhuas hlawv dua thaum twg cov lis ciam daim duab peb sab ntawm melted thiab molten pob. Tom qab forging qhov hlawv, tsis tseg, feem ntau yuav tsum tau seem.
Nyob rau sab lus cua kub uas loj ingots steel thiab tsis thermal conductivity uas muaj alloy steel thiab kub kub alloy billets thaum twg, yog theem kub thiab txias tsis muaj cua sov ceev dhau heev, teb kom loj kub sib txawv hauv sab nraum zoov, muaj txoj kev thermal kev nyuab siab heev. Dawb paug zaum no vim yog tus tsis kub thiab uas tsis muaj plasticity, thermal kev nyuaj siab tsis pub tshaj tus nqi ntau tshaj ntawm cov Tshuag zog, yuav tau ua los ntawm cov nrib pleb central cua kub radiating ib ncig los, kom lub tseem Tshooj phua.