crucibles yog dab tsi?

Cov muaj pes tsawg leeg ntawmcruciblecov ntaub ntawv thiab lawv qhov tseem ceeb hauv metallurgy

Crucible yog ib qho khoom siv tseem ceeb hauv kev lag luam metallurgical, siv los ntim thiab kub ntau yam hlau thiab alloys. Txawm li cas los xij, cov khoom muaj pes tsawg leeg ntawm crucible ncaj qha cuam tshuam rau nws cov kev ua tau zoo thiab lub neej nyob rau hauv qhov kub thiab txias. Yog li ntawd, kev nkag siab txog qhov muaj pes tsawg leeg ntawm cov khoom siv crucible yog qhov tseem ceeb rau kev xaiv qhov zoo crucible rau daim ntawv thov metallurgical. Kab lus no yuav tshawb txog cov khoom tseem ceeb ntawm cov crucibles thiab lawv qhov tseem ceeb hauv kev siv metallurgical.

1. Graphite crucible
Graphite crucible yog ib qho ntawm ntau hom. Vim nws zoo heev kub tsis kam thiab tshuaj stability, nws yog dav siv nyob rau hauv lub smelting ntawm non-ferrous hlau xws li txhuas, tooj liab, thiab kub. Cov khoom tseem ceeb ntawm graphite crucible yog carbon, uas muaj cov thermal conductivity zoo heev, tso cai rau cov hlau kom sov sai thiab sib npaug, yog li txo lub sijhawm smelting. Tsis tas li ntawd, graphite crucible muaj qhov zoo corrosion kuj thiab tuaj yeem tiv taus qhov yaig ntawm feem ntau acidic thiab alkaline molten tshuaj.

2.Silicon carbide crucible
Silicon carbide crucibles yog nyiam los ntawm kev lag luam metallurgical rau lawv cov hardness zoo heev thiab oxidation tsis kam. Silicon carbide yog cov khoom siv tawv heev uas tuaj yeem tiv taus kub heev yam tsis muaj deforming. Piv nrog rau graphite crucibles, silicon carbide crucibles muaj lub neej ntev kev pab cuam thiab tshwj xeeb tshaj yog haum rau melting hlau, hlau thiab lwm yam high-temperature hlau. Tsis tas li ntawd, cov khoom siv silicon carbide muaj qhov zoo thermal shock stability, txo qhov kev pheej hmoo ntawm kev puas tsuaj rau lub crucible vim yog kub hloov ceev.

3. Ceramic crucible
Ceramic crucibles yog tsim los ntawm cov ntaub ntawv ceramic xws li alumina thiab zirconia. Cov crucibles no muaj cov tshuaj lom neeg zoo heev thiab tsim nyog rau kev ua cov hlau thiab cov hlau uas muaj corrosive rau lwm cov ntaub ntawv. Lub siab melting point ntawm ceramic crucibles ua rau lawv nyob ruaj khov nyob rau hauv ultra-siab kub tej yam kev mob thiab yog dav siv nyob rau hauv lub chaw soj nstuam thiab ib co tshwj xeeb muaj kev siv. Txawm li cas los xij, ceramic crucibles yog cov nkig thiab yuav tsum tau ceev faj thaum siv kom tsis txhob tawg vim muaj kev cuam tshuam rau txhua yam.

4. Hlau crucible
Steel crucibles feem ntau yog siv nyob rau hauv loj hlau smelting ua hauj lwm, xws li foundries. Steel crucibles feem ntau yog ua los ntawm cov cua sov-resistant steel alloys thiab muaj zoo heev mechanical zog thiab kub tsis kam. Txawm hais tias steel crucibles tsis yog thermally conductive li graphite crucibles, lawv tuaj yeem tiv taus lub cev muaj zog, ua rau lawv tsim nyog rau kev ua haujlwm melting uas yuav tsum tau nquag thauj khoom thiab tshem tawm lossis hloov chaw.

5. Lwm yam khoom siv
Ntxiv nrog rau cov khoom siv crucible uas tau hais los saum toj no, kuj tseem muaj qee cov ntaub ntawv tshwj xeeb siv rau lub hom phiaj tshwj xeeb. Piv txwv li, tungsten crucibles feem ntau siv nyob rau hauv high-temperature thwmsim vim lawv tsis tshua muaj melting point thiab corrosion kuj. Titanium crucibles yog siv los smelt tshwj xeeb alloys vim hais tias lawv tsis hnov ​​mob nrog ntau hlau.

Hauv kev xaus
Cov khoom muaj pes tsawg leeg ntawm lub crucible tsis tsuas yog txiav txim siab nws stability thiab durability nyob rau hauv high kub ib puag ncig, tab sis kuj ncaj qha cuam tshuam rau efficiency thiab kev ruaj ntseg ntawm cov txheej txheem smelting. Yog li ntawd, thaum xaiv lub crucible, cov khoom siv tshuaj lom neeg, thermal conductivity, mechanical zog thiab kev pab lub neej yuav tsum raug xam raws li cov kev thov tshwj xeeb. Crucibles ntawm cov ntaub ntawv sib txawv ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev lag luam metallurgical, muab kev lees paub txhim khu kev qha rau kev ua haujlwm zoo thiab nyab xeeb.