Niobium Carbide ufa, NbC

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Niobium Carbide ufa, NbC

ziwiya zadothi zambirimbiri ndi chimodzi mwazida zopangira zida zamagetsi zamagawo angapo. Zipangizo zamagetsi zamagawo angapo zomwe zimapangidwa nthawi zambiri zimakhala zovuta, malo osungunuka kwambiri, kusasunthika kwamankhwala komanso magwiridwe antchito Amagwiritsidwa ntchito pamagulu osavala, zida zodulira ndi ma elekitirodi


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Carbide wa Niobium
Kuyanjana kwa mankhwala: Nbcnt: 3500. C.
Malo otentha: 4300. C.
Kachulukidwe: 7. 6g / ml pa 25 "C (izo)
Fomu: akakhala chitsulo ufaKugwiritsa ntchito kwa zinthu zopangira (1) ziwiya zadothi zingapo ndi chimodzi mwazida zopangira zida zamagetsi zamagawo angapo. Zipangizo zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zamagetsi zomwe zimapangidwa ndimitundu ingapo ya ceramiczida zopangidwa nthawi zambiri zimakhala zolimba ndi WC ndi Co limodzi ndi ma carbide ena, omwe amasintha molimba kutentha kwa kutentha ndi kutentha kwa cementedcarbide Impact, kutentha ndi kukana. Popeza niobium carbide ili ndi maubwino owongolera kuuma kwa aloyi ndikusintha kupindika kwa aloyi, itha kugwiritsidwa ntchito kukonzekera zida zamatabwa za carbide zolimbitsa bwino. 3) Gawo lolimba la niobium carbidehard la elekitirodi yomwe ikupezeka ikulowa m'machitidwe a osakwirayo, kuti wosanjikizawo azikhala ndi mafupa osavala bwino, komanso kukana kwa zovala kumawongoleredwa bwino. Chitsulo chosakanikirana cha electrodewelding ndichokwera 1.2-1.8 kuposa chitsulo chozimitsa 45 (HRC50) ndi nthawi 2.43.6 kuposa al-Fe-cr-cb alloy-resistant alloy. Nthawi yomweyo, chosanjikiza chosakanikirana ndi mawonekedwe sikutanthauza kutentha pakamawotcherera .ndipo kumatha kupezeka padziko lapansi. Tating'onoting'ono tating'onoting'ono tomwe timatulutsa pamwamba titha kumasula kupsinjika kwazomwe zili pamwamba pake ndipo sizingafalikire pazoyambira. d Chitsulo cholimbitsa gawo Kuphatikiza kuchuluka kwa carbide wa niobium pantchito yopanga chitsulo kumatha kukwaniritsa kukokoloka kwa mpweya ndikulimbitsa kristalo, potero kumathandizira makina azitsulo. (4) Zida zogwiritsira ntchito popanga zida zamagetsi zimagwiritsidwa ntchito ngati zida zamankhwala pokonzekera zida zamagetsi

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Carbide wa Niobium
CAS (12069-94-2
EINECS. 235-117-8
katundu wa physico-chemical
Niobium carbide ndi wobiriwira kiyubiki kristalo wokhala ndi luster wachitsulo ndipo ndi wa sodium chloride cubic crystal system.
Kuchuluka kwachibale 8.47, latisi nthawi zonse A = 0.447nm,
Malo osungunuka ndi 3500 ℃. Microhardness> 23.5 Gpa (> 2400 kg / mm2), yolimba kuposa corundum. 338000 N / anali modulus modulus, coefficient yowonjezera kutentha kwa 6.65 * 10 ^ (6) / K, kutentha kwa 14 w / (m K), kumatulutsa kutentha - 140.7 kJ / mol, kutentha kwapadera kwa 36.8 J / (mol · K), kukana kwa 35 mu Ω · cm.
Zosasungunuka m'madzi otentha komanso ozizira a hydrochloric acid, sulfuric acid, nitric acid, osungunuka mu asidi otentha a hydrofluoric acid ndi nitric acid osakanikirana. Khola pa 1000 ~ 1100 ℃ ndipo limakhazikika kwambiri kuti niobium pentoxide pamwamba pa 1100 ℃. Niobium carbide ndiyosavuta kusakanikirana ndi titaniyamu carbide, zirconium carbide, tungsten carbide ndi mankhwala ena, ndipo palimodzi kuti apange chosakanikirana cholimba chosakanikirana. Limatsogolera mfundo: 3500 ℃, kachulukidwe: 7.6g / cm (25 ℃) ntchito
Monga zowonjezera zowonjezera carbide, ndi gawo limodzi lamayankho olimba a ternary ndi quaternary carbide, monga WC-NBC-C ternary system. Komanso akhoza kupanga chibakuwa ngale yokumba.
Ma polycarbides otengera izi, monga machitidwe a ternary a NBC-WC-C, atha kugwiritsidwa ntchito ngati zida zopangira nozzle pazogwiritsa ntchito mlengalenga
Niobium carbide (NbC) ndi yobiriwira kiyubiki kristalo ndi zachitsulo luster ndipo ndi wa sodium kolorayidi kiyubiki kristalo dongosolo. Ndi mtundu wa malo osungunuka kwambiri, owuma kwambiri, omwe amagwiritsidwa ntchito kwambiri pobwezeretsa kutentha kwazitali komanso zowonjezera zowonjezera.
Monga zowonjezera carbide, ndiye gawo la mayankho olimba a ternary ndi quaternary carbide, monga WC-NBC-C ternary system. Komanso akhoza kupanga chibakuwa ngale yokumba.
Niobium carbide ili ndi bata labwino la mankhwala komanso kutentha kwambiri. Osasungunuka m'madzi otentha komanso ozizira a hydrochloric acid, sulfuric acid, nitric acid, osungunuka m'madzi otentha a hydrofluoric acid ndi nitric acid osakanikirana; Chosakanikacho chidasakanizidwa ndi titaniyamu carbide, zirconium carbide, tungsten carbide ndi mankhwala ena, ndipo chisakanizocho chimapangidwa pamodzi. Khola pa 1000-1100 ℃ ndipo limakhazikika kwambiri kuti niobium pentoxide pamwamba pa 1100 ℃. Nthawi zambiri, imakhala yodzaza m'mabotolo apulasitiki kapena matumba a aluminiyamu mkati mwa katoni.

(2) Kugwiritsa ntchito mankhwala: Kugwiritsa ntchito zida zopangira: - duplex ceramic: ngati imodzi mwazinthu zopangidwa ndi duplex ceramic, zopangidwa ndi niobium carbide duplex zida zadothi zolimba kwambiri, malo osungunuka, kukhazikika kwamankhwala ndi magwiridwe amagetsi, nthawi zambiri amagwiritsidwa ntchito pamagawo osagwiritsidwa ntchito, zida zomangira carbide zomata ndi madera amagetsi: sikuti ingagwiritsidwe ntchito ngati cemented carbide mbewu zokulitsa choletsa, komanso ndi ma carbide ena opangidwa kunja kwa WC ndi Co chachitatu chotulutsa, zimathandizira kwambiri kuuma kwa carbide ndi matenthedwe kukana kuthamanga kukakamizidwa makutidwe ndi okosijeni kukanaNiobium carbide ndikuthandizira kuuma kwa aloyi ndikusintha kulimba kwa aloyi, ndi zina, kuti zitha kugwiritsidwa ntchito pokonzekera kudula ntchito kwa zida zomangira zida za carbide ndi niobium carbide zitha kupangidwa kukhala utoto wofiirira wamtengo wapatali - wowonekera pa elekitirodi, olimba niobium carbide gawo lolimba mgulu lolimba la hardfacing, pangani weldin g wosanjikiza uli ndi mafupa osavala bwino, kuvala kumawongolera kwambiri zotsekemera zama elekitirodi zosavomerezeka, zotsekemera zake kuposa zomwe zidazimitsidwa 45 # chitsulo (HRC50) 1.2 kokwera nthawi 1,8, kuposa momwe Fe - Cr - C - B ikuyendera -imaposa nthawi 2.4 mpaka 3.6 kukanaWelds nthawi yomweyo, osanjikiza osanjikizika otsekemera osanjikiza osawotchera, omwe amapezeka pamalo otsekemera pamwamba, ming'alu yaying'ono imatha kutulutsa kupsinjika kwakunyumba kosafalikira mkati mwa kholo lazitsulo ndi gawo lolimbitsa chitsulo pokonza chitsulo chosanja cha niobium carbide, chitha kukwaniritsa kukhathamitsa kwa mpweya ndi kulimbitsa bwino tirigu, kuti zikwaniritse mawonekedwe azitsulo, zida zogwiritsira ntchito: zomwe zimagwiritsidwa ntchito popanga makina oyendetsera makina oyendetsa ndege ndi makina anyukiliya komanso zida zina zambiri zopangira zida zopangira zida zogwiritsa ntchito zida zokutira: - kufa zitsulo zokutira pamwamba: niobi um carbide ngati ma carbide achitsulo, ali ndi kulimba kwambiri kutentha kwamphamvu ndi kukana kumva kuwawa kotero imagwiritsidwa ntchito pazowonetsa zachitsulo zomwe zingapangitse kukana kwapakati pazovala - chitsulo chogwirira ntchito: muzitsulo zamagetsi zopangira niobium carbide pamwamba pa workpiece, kuuma pamwamba chawonjezeka kwambiri, akhoza kukwaniritsa HV2800 pamwamba, pa nthawi yomweyo, kusintha kutentha ntchito ya kachulukidwe workpiece ndi bungwe, kuti kutalikitsa moyo wake utumiki ndi ndondomeko madzi gawo mafunsidwe angathe kuzindikira niobium carbide coating kuyanika pamwamba pa kuponyera mphete zachitsulo pisitoni, zokutira ndi zinthu zoyambira kuphatikiza ndi zamphamvu; Mphete ya pisitoni yokutira iyi ili ndi mawonekedwe osungira bwino mthumba, komanso maubwino owuma onse, atha kuchepetsedwa popanda kupaka mafuta ndi kutsetsereka koyefishienti komwe kuli dizilo kondomu yamafuta amafuta, ikuthandizira kwambiri kukana, imatha kuchepetsa kukangana kwa injini ya dizilo nthawi yomweyo, kusintha magwiridwe antchito a dizilo - zina zokutira za niobium carbide: spacecraft yazida zotentha kwambiri zomwe zimagwiritsa ntchito niobium carbide zokutira, zitha kupangitsa kuti moyo wake wautumiki ukhale wabwino kwambiri pamakampani azamagetsi, zida zamagetsi zamagetsi zogwiritsira ntchito ultrafine cobalt yomwe ili ndi niobium carbide, kuti ichepetse kuchuluka kwa ma radiation pa Kutsika kwa gululiKuchepetsa kutentha kwa gululi ndikuchepetsa kutulutsa kwa gululi kumathandizira kwambiri, kuti kutalikitsa moyo wamachubu zamagetsi pogwiritsa ntchito chitsulo cha niobium: njira yayikulu yochepetsera imagwiritsidwa ntchito kutulutsa chitsulo cha niobium, Kutulutsa kwa niobium carbide koyamba kugwiritsidwa ntchito ngati njira yochepetsera, ndipo niobium pentoxide idapanga chitsulo cholimba cha niobium, chopangidwa kuti chiyeretsedwe choyera kwambiri cha niobium kuphatikiza, niobium carbide ikhozanso kutsogolera kuchepa kuti apange chitsulo choyera cha niobium niobium pentoxide.

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