Taw qhia rau tsib qhov kev thov loj ntawm Silicon Nitride Ceramics

Taw qhia rau tsib qhov kev thov loj ntawm Silicon Nitride Ceramics

1, Kev siv hauv kev lag luam metallurgy

1. Sintered silicon nitride muaj cov coefficient tsawg ntawm linear expansion, yog li nws muaj thermal shock tsis kam, thib ob tsuas yog quartz thiab microcrystalline iav;

2. Silicon nitride muaj qhov sib txhuam coefficient tsawg thiab nws tus kheej lubricating zog, ua rau nws yog ib qho zoo heev hnav-resistant khoom nrog zoo heev hnav tsis kam;

3. Silicon nitride muaj lub zog txhua yam thiab tsis tshua muaj kev kub ntxhov;

4. Muaj cov khoom siv hluav taws xob zoo heev;

5. Nws muaj cov tshuaj zoo heev thiab tuaj yeem tiv taus corrosion los ntawm tag nrho cov inorganic acids thiab qee cov hauv paus tshwj tsis yog hydrofluoric acid.

2, Daim ntawv thov hauv kev lag luam chemical

1. Kev siv hauv kev lag luam xws li txhuas, tooj liab, thiab zinc smelting

Nyob rau hauv aluminium casting thiab dov cov kab ntau lawm, nrog rau kev ua haujlwm ntawm aluminium smelting thiab melting, silicon nitride ceramics tuaj yeem siv los ua qhov ntsuas kub ntsuas lub tes tsho thermocouple, nrog rau hauv ob sab phlu rau aluminium smelting furnaces, "baozi" hauv ob sab phlu rau txhuas kua, crucibles, thiab txawm lub twj tso kua mis, kav dej, li qub, thiab pwm rau txhuas casting uas thauj txhuas kua, tag nrho cov uas tuaj yeem ua los ntawm silicon nitride.

2. Daim ntawv thov hauv kev lag luam steelmaking thiab dov

Lub luag haujlwm tseem ceeb tshaj plaws ntawm silicon nitride ua cov khoom siv refractory hauv kev lag luam steelmaking yog raws li lub nplhaib sib cais rau kab rov tav nruam casting. Nyob rau hauv kab rov tav nruam casting, lub nplhaib sib cais faib cov hlau ntws mus rau hauv molten steel cheeb tsam thiab steel solidification pib cheeb tsam, ua si lub luag hauj lwm nyob rau hauv sib cais cov kua-khoom interface ntawm cov hlau, thiab ua si lub luag hauj lwm zoo nyob rau hauv kev tswj kom ruaj khov steel solidification pib. point thiab casting billet zoo.

3. Daim ntawv thov hauv kev lag luam hlau

Nyob rau hauv xyoo tas los no, tau muaj kev loj hlob sai hauv kev siv cov khoom siv silicon nitride thiab silicon carbide hauv cov tshuab hluav taws xob tawg. Kwv yees li 61% ntawm qhov cub tawg hauv Suav teb tau txais nws, tshwj xeeb tshaj yog cov tshuab hluav taws xob loj loj nrog lub cub tawg txoj kab uas hla ntawm 12-15m. Qhov kev sim qhia tau hais tias silicon nitride muaj cov slag corrosion kuj thiab oxidation tsis kam.

4. Daim ntawv thov hauv kev lag luam hlau kub kho

Siv silicon nitride ceramics los ua ib tug spindle los tuav lub iav kom ua tiav, nws yog rhuab los ntawm chav tsev kub mus rau 900 degree nyob rau hauv ib tug induction rauv rau 45 vib nas this, thiab ces quenched nrog iav roj. Cov txheej txheem no rov ua dua, nrog 5000 kev ua haujlwm hauv ib lub lis piam thiab siv tas li rau ib xyoos. Txawm li cas los xij, luxurious ceramic spindle tsuas yog qhia me ntsis hnav. Silicon nitride ceramics yog haum rau fixtures rau workpieces thiab hooks rau cua sov ntsiab nyob rau hauv lub tshuab nqus tsev kho cua sov, raws li lawv muaj cov yam ntxwv ntawm kub tsis kam thiab seem stability ntawm high kub.

5. Kev npaj cov porous ceramics

Porous silicon nitride ceramics muaj cov khoom ntawm silicon nitride ceramics thiab cov khoom ntxeem tau. Lawv tsis tsuas yog muaj cov yam ntxwv ntawm lub zog siab, zoo toughness, zoo creep kuj, zoo structural stability, nag corrosion kuj, thiab zoo heev thermal poob siab kuj ntawm silicon nitride ceramics, tab sis kuj muaj cov yam ntxwv ntawm tsawg ntom, tsis tshua muaj dielectric tsis tu ncua, thiab tsawg. dielectric poob ntawm cov khoom porous. Yog li ntawd, porous silicon nitride tuaj yeem siv rau hauv aviation thiab aerospace teb raws li cov kav hlau txais xov npog cov khoom siv rau hauv qhov chaw hnyav. Cov kav hlau txais xov radar npog ua los ntawm silicon nitride ceramics tuaj yeem siv rau hauv cov dav hlau ceev ntawm 6-7 Ma, nrog lub zog siab, zoo tiv thaiv thermal shock thiab nag yaig.

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