Yuav ua li cas los txhim kho qhov kub tsis kam ntawm induction melting rauv hauv ob sab phlu? Tom qab nyeem nws, kuv tau txais txiaj ntsig ntau!

Kev kub siab ua haujlwm ntawm lub qhov cub hauv ob sab phlu feem ntau yog nyob ntawm lub cev, tshuaj lom neeg thiab cov ntxhia hauv cov khoom siv refractory siv. Raws li lub hauv paus ntawm kev xaiv cov khoom nyoos thiab cov khoom siv pabcuam, cov txheej txheem sintering yog tus yuam sij kom tau txais lub microstructure zoo ntawm lub qhov cub hauv ob sab phlu los muab kev ua si tag nrho rau nws qhov kub thiab txias. Txheej txheem. Lub degree ntawm densification ntawm ob sab phlu sintering muaj feem xyuam rau cov tshuaj muaj pes tsawg leeg, particle loj piv, sintering txheej txheem thiab sintering kub ntawm cov ntaub ntawv refractory.

Cov txheej txheem tsim hluav taws xob

1. Tshem tawm daim ntawv mica thaum tsim lub qhov cub.

2. Cov siv lead ua quartz xuab zeb rau kev tsim kho rauv yog kho raws li hauv qab no:

(1) Kev xaiv tes: feem ntau tshem cov pob thiab lwm yam impurities;

(2) Sib nqus sib cais: sib nqus impurities yuav tsum raug tshem tawm tag nrho;

3. Cov khoom siv qhuav ramming: nws yuav tsum tau maj mam qhuav, qhov ziab kom qhuav yog 200 ℃ – 300 ℃, thiab txuag hluav taws xob ntau tshaj 4 teev.

4. Kev xaiv ntawm binder rau nruab nrab zaus hluav taws xob rauv: siv boric anhydride (B2O3) es tsis txhob boric acid (H3BO3) raws li cov binder, thiab cov nyiaj ntxiv yog 1.1% -1.5%.

Kev xaiv thiab kev faib ua feem ntawm cov khoom siv hauv tsev:

1. Kev xaiv cov khoom siv rauv: Nws yuav tsum tau muab sau tseg tias tsis yog tag nrho cov quartz xuab zeb nrog SiO2≥99% tuaj yeem siv ua induction rauv hauv ob sab phlu. Qhov tseem ceeb yog qhov loj ntawm quartz siv lead ua nplej. Lub coarser cov hmoov nplej siv lead ua, tsawg dua lattice defects, qhov zoo dua. (Piv txwv li, siv lead ua quartz xuab zeb SiO2 muaj siab purity, dawb thiab pob tshab tsos.) Qhov loj ntawm lub cub tawg muaj peev xwm, qhov yuav tsum tau ntau dua rau cov khoom siv lead ua hmoov nplej.

2. Qhov Loj: Qhov sib piv ntawm quartz xuab zeb rau qhov cub hauv ob sab phlu: 6-8 mesh 10% -15%, 10-20 mesh 25% -30%, 20-40 mesh 25% -30%, 270 mesh 25% -30% .

Sintering txheej txheem thiab sintering kub:

1. Lub knotting ntawm lub hauv ob sab phlu: lub knotting zoo ntawm lub hauv ob sab phlu ncaj qha mus rau lub sintering zoo. Thaum knotting, cov xuab zeb particle loj faib yog sib xws thiab tsis muaj kev sib cais tshwm sim. Cov txheej txheem knotted sand txheej muaj qhov siab ntom ntom, thiab qhov tshwm sim ntawm kev tawg tom qab txo qis, uas tau txais kev pab cuam lub neej induction hauv ob sab phlu.

2. Knoted rauv taws hauv qab: cov tuab ntawm cov cua sov hauv qab yog li 280mm, thiab cov xuab zeb cying tom qab ci tom qab ci thiab sintering tsis ntom. Yog li ntawd, lub thickness ntawm pub yuav tsum nruj me ntsis tswj. Feem ntau, lub thickness ntawm cov xuab zeb filling yog tsis ntau tshaj 100mm / txhua lub sij hawm, thiab lub cub tawg phab ntsa yog tswj nyob rau hauv 60mm. Ntau tus neeg tau muab faib ua kev hloov pauv, 4-6 tus neeg ua haujlwm ib zaug, thiab 30 feeb rau txhua lub pob los hloov, nyob ib ncig ntawm lub cub tawg tig maj mam thiab siv sib npaug kom tsis txhob muaj qhov sib npaug.

3. Knotting furnace phab ntsa: lub thickness ntawm lub qhov cub hauv ob sab phlu yog 110-120mm, ntxiv qhuav knotting khoom nyob rau hauv batches, daim ntaub yog uniform, lub thickness ntawm cov muab tub lim yog tsis ntau tshaj 60 hli, thiab knotting yog 15 feeb (manually knotting. ) kom txog thaum nws yog theem nrog rau sab sauv ntawm lub nplhaib induction ua ke. Cov pwm crucible tsis raug tshem tawm tom qab knotting tiav, thiab nws ua haujlwm li induction cua sov thaum ziab thiab sintering.

4. Ci thiab sintering specifications: Yuav kom tau txais peb-txheej txheej txheem ntawm lub cub tawg hauv ob sab phlu, lub ci thiab sintering txheej txheem yuav roughly muab faib ua peb theem:

5. Ci theem: cua sov cov pwm crucible mus rau 600 ° C ntawm qhov ceev ntawm 25 ° C / h thiab 50 ° C / h raws li, thiab khaws cia rau 4h, lub hom phiaj yog kom tshem tawm cov ya raws ntawm lub cub tawg.

6. Semi-sintering theem: cua sov ntawm 50 ° C / h rau 900 ° C, tuav rau 3h, cua sov ntawm 100 ° C / h mus rau 1200 ° C, tuav rau 3h, cov cua kub yuav tsum tau tswj kom tsis txhob tawg.

7. Ua tiav sintering theem: Thaum lub sij hawm kub sintering, sintered qauv ntawm nruab nrab zaus hluav taws xob rauv crucible yog lub hauv paus rau kev txhim kho nws cov kev pab cuam lub neej. Lub sintering kub yog txawv, lub thickness ntawm sintering txheej yog tsis txaus, thiab cov kev pab cuam lub neej yog ho txo.