Si3N4 cov khoom pob tawb zoo nkauj
Silicon nitride ceramic npas muaj lub zog loj, hnav siab tsis kam, siab kub ua hauj, kev tiv thaiv corrosion, acid thiab alkali tsis kam, thiab tuaj yeem siv mus ntev ntev hauv dej hiav txwv, thiab muaj cov yam ntxwv zoo rwb thaiv tsev. Yuav tiv taus ntau cov kev siv ntau thiab thaj chaw ua haujlwm.
Si3N4 cov khoom pob tawb zoo nkauj muaj siab hardness thiab lub teeb yuag. Thaum siv ntau yam tshwj xeeb cov khoom siv lossis cov cuab yeej siv, lawv muaj qhov sib tshooj me dua ntawm kev sib txhuam thiab ua kom nrawm nrawm, uas ua rau hnav qis dua thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv.
Si3N4 cov khoom pob tawb zoo nkauj tiv taus qhov kub thiab txias thiab tuaj yeem ua haujlwm stably nyob rau qhov chaw sov siab qis dua 1200 degrees Celsius nrog cov ntim hloov me me. Kev ua tau zoo dua ntawm kev ua haujlwm thermal, kev ntsuas kub thermal ntau yog 900-1000 degrees Celsius.
Nws kuj muaj lub zog nws tus kheej thiab muaj peev xwm siv tau rau hauv qhov chaw ib puag ncig uas tsis muaj qhov nruab nrab ntub tau muaj kuab paug. Ua cov khoom siv ntawm kev xaiv rau ceramic bearings thiab hybrid ceramic pob bearings.
Piv nrog steel pob, qhov zoo tseem ceeb ntawm cov pob txhaws yog:
(1) Nws yog 59% sib dua dua li cov pob steel, uas txo cov centrifugal quab yuam, yob thiab cov nyom ntawm txoj kev sib tw thaum cov kabmob khiav ntawm kev kub ceev;
(2) Cov qauv ntawm kev hloov pauv yog 44% loj dua li ntawm cov hlau, uas txhais tau hais tias tus nqi ntawm deformation yog me dua li ntawm cov hlau pob thaum raug quab yuam;
(3) Hardness siab dua li cov hlau, HRC ncav cuag 78;
(4) Cov coefficient ntawm kev sib txhuam yog qhov me me, tsis muaj hlau nplaum, tiv thaiv hluav taws xob, thiab ntau dua tshuaj tiv thaiv kev xeb ntau dua li hlau;
(5) Cov coefficient ntawm thermal nthuav yog 1/4 ntawm cov hlau, uas tuaj yeem tiv taus kev hloov kub sai;
(6) Lub npoo tiav zoo dua, Ra tuaj yeem ncav cuag 4-6 nanometers;
(7) Qhov kub tsis kam tiv taus, cov pob ceramic tseem muaj lub zog siab thiab tawv ntawm 1050 degrees Celsius;
(8) Nws yuav tsis xeb thiab tuaj yeem ua haujlwm nyob rau hauv cov roj-free lubrication tej yam kev mob.
