Uxinzelelo lwe-atmospheric sintered silicon carbide yi-carbide engeyiyo eyentsimbi enesilicon kunye ne-carbon covalent bond, kwaye ukuqina kwayo kukwesibini kuphela kwidayimane kunye ne-boron carbide. Ifomula yeekhemikhali yiSiC. Iikristale ezingenambala, ezibhlowu namnyama ngenkangeleko xa i-oxidized okanye iqulethe ukungcola. Ukuguqulwa kwe-silicon carbide kunye nesakhiwo sedayimani ngokuqhelekileyo kuthiwa yi-emery. Ukuqina kwe-emery kusondele kwidayimane, ukuzinza okuhle kwe-thermal, kuzinzile kwi-hydroxy acid isisombululo esinamanzi kunye ne-sulfuric acid egxininisiweyo, kunye nokungazinzi kwi-asidi edibeneyo okanye i-phosphoric acid ye-hydrogen acid kunye ne-nitric acid. Iialkali ezinyibilikayo kwindawo enomngxuma ziyahlula. Yahlulwe ibe yi-silicon carbide yokwenziwa kunye ne-silicon carbide yendalo. I-silicon carbide yendalo, eyaziwa ngokuba yi-carbonite, ifumaneka ikakhulu kwi-kimberlite kunye ne-volcanic amphibolite, kodwa isixa sayo sincinci kwaye asinalo ixabiso lokumba.
I-industrial atmospheric pressure sintered silicon carbide ngumxube we-SiC kunye ne-SiC kwaye iza ngemibala emibini: emnyama kunye eluhlaza. I-silicon carbide ecocekileyo ayinambala, equlethe ukungcola kumnyama, eluhlaza, eluhlaza okwesibhakabhaka, emthubi. Imida ye-hexagonal kunye ne-cubic grain, i-crystal i-plate, ikholamu edibeneyo. Glass luster, ingxinano 3.17 ~ 3.47G/CM3, Morse ubulukhuni 9.2, imakroskopu kwakhona kwi 30380 ~ 33320MPa iqondo lokunyibilika: atmospheric 2050 waqalisa ukwahlula, recovery umoya 2600 waqala ukwahlula. I-elastic coefficient yi-466,480 MPa. Amandla okuqina yi-171.5MPa. Amandla oxinzelelo yi-1029MPa. I-coefficient yokwandiswa komgca ngu (25 ~ 1000)5.010 ~ 6/. I-thermal conductivity (20) yi-59w/(mk). Ukuzinza kweekhemikhali, ukubilisa kwi-HCl, i-H2SO4, i-HF ayiyi kutshabalalisa.
Ngokweendlela ezahlukeneyo zokusetyenziswa, uxinzelelo lwe-atmospheric sintered silicon carbide yahlulwe yaba yi-abrasive, data refractory, i-deoxidizer, i-silicon carbide yombane njalo njalo. Umxholo we-SiC we-abrasive silicon carbide awuyi kuba ngaphantsi kwe-98%. I-refractory silicon carbide yahlulwe ibe: (1) i-data refractory ye-silicon carbide emnyama, umxholo wayo we-SiC ufana ngqo nokusila i-silicon carbide. (2) Idatha ye-refractory yesibini ye-silicon carbide emnyama, umxholo we-SiC ongaphezulu kwe-90%. (3) Umxholo we-silicon carbide emnyama kunye ne-SiC kwii-refractories ezisezantsi azikho ngaphantsi kwe-83%. Umxholo we-silicon carbide kunye ne-SiC esetyenziswe kwi-deoxidizer ngokuqhelekileyo kufuneka ibe ngaphezu kwe-90%. Nangona kunjalo, i-carbon industrial graphitization furnace insulation, i-silicon carbide content engaphezu kwe-45% yonyango ingasetyenziselwa njenge-steelmaking deoxidizer. I-silicon carbide ye-agent ye-deoxidizing ineentlobo ezimbini zemilo yomgubo kunye nebhloko yokubumba. I-powder deoxidizer emnyama isilicon carbide ngokubanzi inobungakanani besuntswana le-4 ~ 0.5 mm kunye ne-0.5 ~ 0.1 mm.
I-silicon carbide esetyenziswa ngombane ineendidi ezimbini eziphambili
(1) I-silicon carbide eluhlaza esetyenziselwa izinto zokufudumeza zombane ngokuyimfuneko iyafana ne-silicon carbide eluhlaza esetyenziselwa ukugaya.
(2) I-silicon carbide ye- arrester ineemfuno ezikhethekileyo zomsebenzi wombane, ohluke kwi-silicon carbide emnyama yokugaya idatha ye-refractory.
Ukusetyenziswa koxinzelelo lwe-atmospheric sintered silicon carbide
Iimveliso zoxinzelelo lwe-atmospheric sintered silicon carbide zinemisebenzi ekhethekileyo efana nokumelana nobushushu obuphezulu, ukumelana nokunxiba, ukumelana nobushushu, ukumelana nomlilo, ukuxhathisa kwimitha, umbane ogqwesileyo kunye ne-thermal conductivity, njl., kwaye zisetyenziswe ngokubanzi kumasebe ahlukeneyo oqoqosho lwelizwe. E-China, i-silicon carbide eluhlaza isetyenziswa ikakhulu njenge-abrasive. I-silicon carbide emnyama isetyenziselwa ukwenza amatye okusila, ahlala esetyenziselwa ukusika kunye nokusila izinto ezinamandla aphantsi, njengeglasi, iiseramics, ilitye, iirefractories, kunye nokucola iindawo zentsimbi kunye nezixhobo zetsimbi ezingenayo i-ferrous. Ukusila okwenziwe ngesilicon carbide eluhlaza kusetyenziswa ikakhulu ukucola i-carbide ene-cemented, i-titanium alloy, iglasi yokukhanya, kunye nokusila i-cylinder liner kunye nezixhobo zentsimbi ezinesantya esiphezulu. Ii-abrasives ze-Cubic silicon carbide zisetyenziselwa kuphela ukugaya okuchanekileyo kweebheringi ezincinci. Ukumelana nokunxiba kwee-impellers ze-turbine kunokuphuculwa kakhulu ngokusebenzisa i-SIC powder kubo nge-electroplating. Ukusebenzisa uxinzelelo lomatshini ukutyhala i-cubic SiC200 mill kunye ne-W28 micro-powder kwindonga ye-cylinder ye-injini yokutsha yangaphakathi, ubomi be-cylinder bunokuba ngaphezu kokuphindwe kabini.
Ixesha lokuposa: Jun-16-2023