Reaction-sintered silicon carbide ndi mtundu watsopano wa zida zadothi zapamwamba, zomwe zimakhala ndi mphamvu zambiri, kuuma kwakukulu, kukana kuvala bwino komanso kukana dzimbiri, ndipo zimagwiritsidwa ntchito kwambiri muzitsulo, petrochemical, zamagetsi, zakuthambo ndi zina. The mankhwala ndi pakachitsulo carbide abrasive wothandiza mpweya wakuda, graphite ndi zina zosiyanasiyana, ntchito kukanikiza youma, extrusion kapena kuthira njira kuti porous khalidwe, ndiye zotsatirazi pamodzi kumvetsa kupanga zotakasuka sintering silicon carbide!
Reactive sintering silicon carbide Chopangidwacho ndi njira yaukadaulo yokhwima pambuyo poyesa masauzande ambiri ndi woyambitsa kwa zaka zambiri kuti alimbikitse njira yopangira ndi kupanga, makamaka njira yapadera yopitilira sintering.
Potengera 1 pakupanga, gawo lolemera la silicon carbide ufa ndi magawo 5-8, mpweya wakuda ndi magawo 0.5-1.5, graphite ndi magawo 1-1.5, ndipo binder ndi magawo 0.1-0.5. Pakati pawo, kukula kwambewu ya silicon carbide ndi sic (90-30m) 3-5 magawo, sic) 30-0.8m) 2-3 magawo. The methyl cellulose ndi PVA ufa wa mbawala anayikidwa mu mlingo woyenera wa madzi 0.1-0.5 magawo motero, ndipo njira mandala anapezedwa pambuyo kutentha.
1. Sakanizani mitundu yonse ya ufa, zomatira ndi zothetsera zomwe zakonzedwa molingana ndi ndondomeko ndikugwedeza bwino.
2, yeretsani vacuum yoponyera nkhungu, kufika 0.1Mpa, jekeseni wamagetsi a slurry wosakanikirana. Patapita nthawi, slurry imatulutsidwa ndipo chopanda kanthu chimachotsedwa. Sungani pa 30-70 kwa maola 18-20 kuti muumitse.
3. Dulani billet molingana ndi zofunikira za kujambula.
4, ikani momwe sintering billet mu ng'anjo, onjezerani kulemera kwa magawo 1-3 a silicon yachitsulo, vacuum sintering. Njirayi imagawidwa mu kutentha kochepa 0-700, kusungidwa kwa maola 3-5; Kutentha kwapakati 700-1400, sungani maola 4-6; Sungani kutentha kwakukulu kwa 1400-2200 kwa maola 5-7. Siyani kutentha pansi pa 150 kuyimitsa ng'anjo ndikutsegula ng'anjo.
5, mchenga kuphulika mankhwala akupera mankhwala pamwamba pakachitsulo slag, ndi mchenga kuphulika akupera.
6, mankhwala opangira makutidwe ndi okosijeni mung'anjo ya okosijeni, maola 24 mpaka 1350, kuzirala kwachilengedwe. Chotsani, fufuzani ndi kuika mu yosungirako.
Zopangira ndi gawo lomwe limatengera njira yopangira zinthuzo ndi zasayansi komanso zololera, kotero kuti chopandacho chili ndi vuto lokwanira ndipo chopandacho chimakhala ndi kachulukidwe kabwinoko; Kutentha kwabwino kwa sintering, kutentha ndi nthawi yogwira zimatsimikizira mphamvu yopindika ya chinthucho. Kuchita kwakukulu ndi khalidwe la njirayi lafika pamtunda wapadziko lonse lapansi. Zizindikiro zake zazikulu ndi izi
Reaction sintering silicon carbide kukhazikitsa mwachindunji
Chitsanzo 1 Njira yopangira mitolo-sintered silicon carbide:
1, zopangira kutenga zomatira kulemera kwa mbali 0,3, kuwonjezera kuchuluka kwa madzi wogawana chipwirikiti, kulemera kwa 6.8 mbali pakachitsulo carbide ufa (tinthu kukula 90-30m wa 3.8 mbali, 30-0.8m 3 mbali) , kaboni wakuda 1 gawo, lakuda
2. Mukathira, choyamba yeretsani nkhungu yomwe yagwiritsidwa ntchito, gwirizanitsani nkhungu, ikonzeni ndi zomangira, jambulani slurry kuchokera mu thanki ndikukakamiza, lembani tanki ndi 0.1Mpa pressure nitrogen, tsitsani kuthamanga, ndikukankhira slurry mu nkhungu. . Pambuyo pofika ola la 1, slurry imatulutsidwa, ndipo pambuyo pa maola 6, nkhungu imachotsedwa, zinthu zopanda kanthu zimachotsedwa, ndipo chipinda chowumitsa chimauma. 30-70, 18-20 maola kuchotsa. 3. Pokonza chopanda kanthu, choyamba fufuzani ngati chopandacho chikukwaniritsa zofunikira zapangidwe. Mukakwaniritsa zofunikira, konzekerani zomwe zilibe kanthu malinga ndi zojambulazo. Mukayang'ana, tumizani kuchipinda chowumitsa kutentha kwambiri.
4. Pambuyo pa chinyezi cha reaction sintering billet kufika 1%, chitulutseni, chotsani billet ndi mpweya wowomba ndikuchiyeza. Onjezani magawo 2.9 achitsulo cha silicon. Nayitrojeni imatha kuponyedwa mu vacuum sintering. Sintering ndondomeko pa 700 otsika kutentha kwa maola 4; Kutentha kwapakati 1400, maola 5; Kutentha kwakukulu kwa maola 2200,6. Pamene kutentha kumatsika maola 12 ndikufika 150, siyani ntchito mu ng'anjo ndikutsegula ng'anjo.
5. Pambuyo pa mankhwala a sandblasting akutuluka, muyezo wa silicon Chartered pamwamba pake ndi pansi ndi kupukutidwa ndi mchenga.
6. Cholinga cha mankhwala oxidation mankhwala ndi kuchotsa oxides kwaiye panthawi sintering ndondomeko. Chogulitsacho chimatenthedwa mpaka 1350 kwa maola 24 mu ng'anjo ya okosijeni ndikuzikhazikika mwachilengedwe. Pambuyo pochotsa, imayikidwa m'malo osungiramo poyang'anitsitsa.
Zopangira ndi gawo lomwe limatengera njira yopangira zinthuzo ndi zasayansi komanso zololera, kotero kuti chopandacho chili ndi vuto lokwanira ndipo chopandacho chimakhala ndi kachulukidwe kabwinoko; Kutentha kwabwino kwa sintering, kutentha ndi nthawi yogwira zimatsimikizira mphamvu yopindika ya chinthucho. Kuchita kwakukulu ndi khalidwe lazinthu zopangidwa ndi njirayi zafika pamtunda wapadziko lonse.
Zomwe zili pamwambazi ndi njira yopangira reactive sintering silicon carbide, ngati mukufuna zambiri, chonde omasuka kulankhula nafe!
Nthawi yotumiza: Jun-13-2023