Txoj kev tsim cov tshuaj reactive sintering silicon carbide

Cov tshuaj tiv thaiv-sintered silicon carbide yog ib hom tshiab ntawm cov khoom siv high-tech ceramics, uas muaj lub zog siab, siab hardness, zoo hnav tsis kam thiab corrosion tsis kam, thiab yog dav siv hauv metallurgy, petrochemical, electronics, aerospace thiab lwm yam teb. Cov khoom nrog silicon carbide abrasive auxiliary carbon dub, graphite thiab ntau yam additives, siv qhuav nias, extrusion lossis pouring txoj kev kom ua porous zoo, ces cov hauv qab no ua ke kom nkag siab txog txoj kev tsim khoom ntawm reactive sintering silicon carbide!

Reactive sintering silicon carbide Qhov kev tsim kho tshiab yog ib txoj kev npaj txuj ci uas paub tab tom qab ntau txhiab qhov kev sim los ntawm tus tsim khoom tau ntau xyoo los txhawb cov mis khoom siv raw thiab cov txheej txheem tsim khoom, tshwj xeeb tshaj yog cov txheej txheem sintering txuas ntxiv mus.

Hauv daim ntawv thov 1 ntawm qhov kev tsim kho tshiab, qhov hnyav feem ntawm cov hmoov silicon carbide yog 5 ~ 8 qhov, carbon dub yog 0.5-1.5 qhov, graphite yog 1-1.5 qhov, thiab binder yog 0.1-0.5 qhov. Ntawm lawv, qhov loj me ntawm cov noob ntawm silicon carbide yog sic (90-30m) 3-5 qhov, sic) 30-0.8m) 2-3 qhov. Cov methyl cellulose thiab PVA hmoov ntawm gazelle tau muab tso rau hauv qhov ntau ntawm cov dej tsim nyog 0.1-0.5 qhov, thiab cov tshuaj pob tshab tau txais tom qab cua sov.

1. Sib tov txhua yam hmoov, cov nplaum thiab cov tshuaj uas tau npaj raws li cov mis thiab do kom zoo.

2, ntxuav lub pwm casting nrog lub tshuab nqus tsev, ncav cuag 0.1Mpa, thiab nias lub tshuab txhaj tshuaj rau cov slurry sib xyaw. Tom qab ib lub sijhawm, cov slurry raug tso tawm thiab cov khoom seem raug tshem tawm. Khaws cia rau 30-70 rau 18-20 teev kom qhuav.

3. Txiav cov billet raws li qhov yuav tsum tau ua ntawm daim duab.

4, muab cov khoom siv sintering billet rau hauv lub cub tawg, ntxiv qhov hnyav ntawm 1-3 feem ntawm cov hlau silicon, thiab sintering hauv lub tshuab nqus tsev. Cov txheej txheem no muab faib ua qhov kub qis 0-700, khaws cia rau 3-5 teev; Qhov kub nruab nrab 700-1400, khaws cia rau 4-6 teev; Khaws cia rau qhov kub siab 1400-2200 rau 5-7 teev. Tso qhov kub qis dua 150, nres lub cub tawg thiab qhib lub cub tawg.

5, kev kho mob xuab zeb blasting sib tsoo cov khoom nto silicon slag, nrog xuab zeb blasting sib tsoo.

6, cov khoom kho oxidation rau hauv lub cub tawg oxidation, 24 teev rau 1350, txias ntuj. Nqa tawm, kuaj xyuas thiab muab tso rau hauv qhov chaw cia khoom.

Cov khoom siv raw thiab qhov sib piv uas tau txais los ntawm txoj kev tsim kho tshiab yog kev tshawb fawb thiab tsim nyog, yog li ntawd cov khoom seem muaj qhov tsis txaus thiab cov khoom seem muaj qhov ceev zoo dua; Kev ua kom sov zoo dua, qhov kub thiab lub sijhawm tuav kom ntseeg tau tias cov khoom muaj zog khoov siab. Kev ua tau zoo thiab zoo ntawm txoj kev no tau mus txog qib siab thoob ntiaj teb. Nws cov cim qhia tseem ceeb yog raws li nram no

Kev siv tshwj xeeb ntawm kev siv tshuaj sintering silicon carbide

Kev Siv 1 Txoj Kev Tsim Khoom Siv Silicon Carbide Uas Muaj Cov Tshuaj Reaction-sintered:

1, cov khoom siv raw kom coj qhov hnyav ntawm cov nplaum ntawm 0.3 qhov, ntxiv ib qho dej kom sib npaug, qhov hnyav ntawm 6.8 qhov ntawm silicon carbide hmoov (qhov loj me ntawm 90-30m ntawm 3.8 qhov, 30-0.8m ntawm 3 qhov), carbon dub 1 qhov, dub

2. Thaum nchuav, ua ntej ntxuav lub pwm siv, teeb tsa lub pwm, kho nws nrog cov fasteners, rub cov slurry tawm ntawm lub tank nrog lub siab, sau lub tank nrog 0.1Mpa siab nitrogen, ua qhov siab nchuav, thiab thawb cov slurry rau hauv pwm. Tom qab ncav cuag 1 teev, cov slurry raug tso tawm, thiab tom qab 6 teev, cov pwm raug tshem tawm, cov khoom dawb paug raug coj tawm, thiab chav ziab qhuav. 30-70, 18-20 teev kom tshem tawm. 3. Thaum kho qhov dawb paug, ua ntej xyuas seb qhov dawb paug puas ua tau raws li qhov yuav tsum tau tsim. Thaum ua tau raws li qhov yuav tsum tau ua, kho qhov dawb paug raws li daim duab kos. Tom qab tshuaj xyuas, xa mus rau chav ziab kub siab.

4. Tom qab cov dej noo ntawm cov hlau uas tau sintering txog li 1%, muab nws tshem tawm, ntxuav cov hlau nrog cua tshuab thiab ntsuas nws. Ntxiv 2.9 feem ntawm cov hlau silicon. Cov pa nitrogen tuaj yeem raug pumped rau hauv lub tshuab nqus tsev sintering. Cov txheej txheem sintering ntawm 700 qhov kub qis rau 4 teev; Qhov kub nruab nrab 1400, 5 teev; Qhov kub siab 2200, 6 teev. Thaum qhov kub poob qis 12 teev thiab ncav cuag 150, tsum tsis txhob ua haujlwm hauv lub cub tawg thiab qhib lub cub tawg.

5. Tom qab cov khoom siv kho sandblasting tawm los, tus qauv silicon Chartered ntawm nws qhov chaw yog av thiab grinded nrog sandblasting.

6. Lub hom phiaj ntawm cov khoom kho oxidation yog tshem tawm cov oxides tsim tawm thaum lub sijhawm sintering. Cov khoom raug cua sov rau 1350 rau 24 teev hauv lub cub tawg oxidation thiab tom qab ntawd txias ntuj. Tom qab tshem tawm, nws raug muab tso rau hauv qhov chaw khaws cia los ntawm kev tshuaj xyuas.

Cov khoom siv raw thiab qhov sib piv uas tau txais los ntawm txoj kev tsim kho tshiab yog kev tshawb fawb thiab tsim nyog, yog li ntawd qhov khoob muaj qhov tsis txaus thiab qhov khoob muaj qhov ceev zoo dua; Qhov kub zoo dua, qhov kub thiab lub sijhawm tuav kom ntseeg tau tias muaj lub zog khoov siab ntawm cov khoom. Kev ua tau zoo tseem ceeb thiab zoo ntawm cov khoom tsim los ntawm txoj kev no tau mus txog qib siab thoob ntiaj teb.

Qhov saum toj no yog txoj kev tsim cov tshuaj reactive sintering silicon carbide, yog tias koj xav tau cov ntaub ntawv ntxiv, thov koj xav tiv tauj peb!