[Mafotokozedwe achidule] Atmospheric pressure sintered silicon carbide ndi carbide yopanda zitsulo yophatikizidwa ndi silicon ndi ma carbon covalent bond, ndipo kulimba kwake ndi kwachiwiri kwa diamondi ndi boron carbide.Njira yamankhwala ndi SiC.Makhiristo opanda mtundu, abuluu ndi akuda amawoneka ngati oxidized kapena ali ndi zonyansa.
Atmospheric pressure sintered silicon carbide ndi carbide yopanda zitsulo yokhala ndi silicon ndi carbon covalent bond, ndipo kuuma kwake ndi kwachiwiri kwa diamondi ndi boron carbide.Njira yamankhwala ndi SiC.Makhiristo opanda mtundu, abuluu ndi akuda amawoneka ngati oxidized kapena ali ndi zonyansa.Kusinthika kwa silicon carbide yokhala ndi diamondi nthawi zambiri kumatchedwa emery.The kuuma kwa emery ndi pafupi diamondi, wabwino matenthedwe bata, khola kuti hydroxy asidi amadzimadzi njira ndi anaikira sulfuric asidi, ndi wosakhazikika kwa asidi osakaniza kapena asidi phosphoric wa anaikira wa hydrogen asidi ndi asidi nitric.Ma alkalis omwe amasungunuka mumlengalenga amasiyana.Imagawidwa mukupanga silicon carbide ndi silicon carbide yachilengedwe.Natural silicon carbide, yotchedwa carbonite, imapezeka makamaka mu kimberlite ndi volcanic amphibolite, koma kuchuluka kwake ndi kochepa ndipo alibe phindu lofukula.
Industrial atmospheric pressure sintered silicon carbide ndi osakaniza a -SiC ndi -SiC ndipo amabwera mumitundu iwiri: yakuda ndi yobiriwira.Silicon carbide yoyera ndi yopanda mtundu, yokhala ndi zonyansa ndi zakuda, zobiriwira, zabuluu, zachikasu.Malire ambewu ya hexagonal ndi cubic, kristalo ndi mbale, mzere wamagulu.Glass luster, kachulukidwe 3.17-3.47G/CM3, Morse kuuma 9.2, maikulosikopu komanso pa 30380 ~ 33320MPa kusungunuka mfundo: mumlengalenga 2050 anayamba kusiyanitsa, kuchira mlengalenga 2600 anayamba kusiyanitsa.Elastic coefficient ndi 466, 480MPa.Mphamvu yamphamvu ndi 171.5MPa.Mphamvu yopondereza ndi 1029MPa.Kukula kwa mzere ndi (25~ 1000) 5.010 ~ 6/, ndi matenthedwe matenthedwe (20) ndi 59w/(mk).Kukhazikika kwa Chemical, kuwira mu HCI, H2SO4, HF sikudzawononga.
Malinga ndi ntchito zosiyanasiyana, mumlengalenga kuthamanga sintered silicon carbide amagawidwa abrasive, deta refractory, deoxidizer, magetsi pakachitsulo carbide ndi zina zotero.SiC zomwe zili mu abrasive silicon carbide sizikhala zosachepera 98%.Ma refractories okhala ndi silicon carbide amagawidwa kukhala: (1) data yakuda ya silicon carbide, zomwe zili ndi SiC ndizofanana ndendende ndi kugaya silicon carbide.(2) Secondary refractory deta wakuda pakachitsulo carbide, SiC zili zoposa 90%.(3) Zomwe zili mu silicon carbide yakuda ndi SiC mu refractories otsika si osachepera 83%.Zomwe zili mu silicon carbide ndi SiC zomwe zimagwiritsidwa ntchito mu deoxidizer nthawi zambiri zimafunika kukhala pamwamba pa 90%.Komabe, mpweya mafakitale graphitization ng'anjo kutchinjiriza, pakachitsulo carbide zili zoposa 45% ya mankhwala Angagwiritsidwenso ntchito ngati steelmaking deoxidizer.Silicon carbide ya deoxidizing agent ili ndi mitundu iwiri ya mawonekedwe a ufa ndi block block.Powder deoxidizer black silicon carbide nthawi zambiri imakhala ndi kukula kwa tinthu 4 ~ 0.5 mm ndi 0.5 ~ 0.1 mm.Zamagetsi zamagetsi silicon carbide zili ndi magulu awiri akulu.(1) Silicon carbide yobiriwira yomwe imagwiritsidwa ntchito potenthetsa magetsi imakhala yofanana ndi silicon carbide yobiriwira yomwe imagwiritsidwa ntchito popera.(2) Silicon carbide for arrester ili ndi zofunikira zapadera zamagetsi, zomwe ndizosiyana ndi silicon carbide yakuda pogaya deta yotsutsa.
Kugwiritsa ntchito mpweya wa sintered silicon carbide
Kupanikizika kwa mumlengalenga sintered silicon carbide mankhwala ali ndi ntchito yapadera monga kukana kutentha kwambiri, kukana kuvala, kukana kutentha, kukana moto, kukana kwa radiation, kuwongolera kwambiri kwamagetsi ndi matenthedwe, ndi zina zambiri, ndipo akhala akugwiritsidwa ntchito kwambiri m'madipatimenti osiyanasiyana azachuma chadziko.Ku China, green silicon carbide imagwiritsidwa ntchito makamaka ngati abrasive.Black silicon carbide imagwiritsidwa ntchito popanga miyala yopera, yomwe nthawi zambiri imagwiritsidwa ntchito podula ndi kugaya zinthu zokhala ndi mphamvu zochepa, monga galasi, zoumba, miyala, zotsukira, komanso pogaya zitsulo zotayidwa ndi zitsulo zopanda chitsulo.Kupera kopangidwa ndi green silicon carbide kumagwiritsidwa ntchito kwambiri popera simenti ya carbide, aloyi ya titaniyamu, magalasi owoneka, komanso pogaya zingwe za silinda ndi zida zachitsulo zothamanga kwambiri.Ma cubic silicon carbide abrasives amangogwiritsidwa ntchito pogaya kopitilira muyeso wa mayendedwe ang'onoang'ono.Kukana kuvala kwa ma turbine impellers kumatha kuwongolera kwambiri pogwiritsa ntchito ufa wa SIC pa iwo ndi electroplating.Pogwiritsa ntchito kukakamiza kwamakina kukankhira mphero ya SiC200 ndi W28 yaying'ono ufa ku khoma la silinda la injini yoyaka mkati, moyo wa silinda ukhoza kuwirikiza kawiri.
Nthawi yotumiza: Oct-11-2023