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Kanthal AF alloy 837 resistohm alchrome Y fecral alloy

Sharaxaad Gaaban:


  • qalab:birta, chrome, aluminium
  • qaab:wareegsan, fidsan
  • Saldhig:jilicsan, adag
  • summad:tankii
  • asalka:Shanghai, Shiinaha
  • Faahfaahinta Alaabta

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    Kanthal AF alloy 837 resistohm alchrome Y fecral alloy

    Kanthal AF waa bir-chromium-aluminium alloy (FeCrAl alloy) oo loo isticmaalo heerkul ilaa 1300°C (2370°F). Daawaha waxaa lagu gartaa caabbinta oksaydheynta oo aad u wanaagsan iyo qaab aad u wanaagsan oo xasilloon taasoo keentay nolol curiye dheer.

    Kan-thal AF waxaa sida caadiga ah loo adeegsadaa walxaha kuleylinta korontada ee foornooyinka warshadaha iyo qalabka guriga.

    Tusaalaha codsiyada wershadaha agabka waxa ku jira curiyayaasha mica u furan ee toasters, timo qallajiye, xubno qaab dhexdhexaad ah oo loogu talagalay kuleyliyayaasha marawaxada iyo sida curiyayaasha gariiradda furan ee walxaha dahaarka fiber ee kuleyliyaha quraarada dhoobada ee safafka, kuleyliyaha dhoobada ee saxannada karkarinta Fiber dhoobada ah oo la qaabeeyey oo loogu talagalay taarikada saxarada dhoobada ah, walxaha gariiradda la hakiyey ee kululeeyayaasha marawaxada, walxaha fiilada tooska ah ee hiitarka, kuleyliyeyaasha is-qaadsiinta, walxaha doofaarka ee qoryaha hawada kulul, radiators, qalajiyaasha.

    Abstract Daraasadda hadda jirta, habka daxalka ee FeCrAl alloy (Kanthal AF) ee ganacsiga inta lagu gudajiro gaaska nitrogen (4.6) ee 900 ° C iyo 1200 ° C ayaa lagu qeexay. Tijaabooyin heerkulbeeg ah iyo heerkulbeeg leh oo leh wadarta waqtiyada soo-gaadhista oo kala duwan, heerarka kulaylka, iyo heerkulka xajinta ayaa la sameeyay. Tijaabada Oxidation ee hawada iyo gaasta nitrogen waxaa lagu sameeyay falanqaynta thermogravimetric. Qaab-dhismeed-yareedka waxa lagu gartaa iskaanka mikroskoobiga elektarooniga ah (SEM-EDX), Auger electron spectroscopy (AES), iyo falanqaynta ion beam (FIB-EDX). Natiijooyinku waxay muujinayaan in horumarka daxalka uu ku dhaco iyada oo loo marayo samaynta gobollada nitridation-ka hoose ee hoose, oo ka kooban qaybaha wajiga AlN, taas oo yaraynaysa dhaqdhaqaaqa aluminiumka waxayna sababtaa qulqulka iyo qulqulka. Nidaamyada samaynta Al-nitride iyo kobaca miisaanka Al-oxide waxay ku xidhan yihiin heerkulka nuglaanta iyo heerka kulaylka. Waxaa la ogaaday in nitridation of Alloy FeCrAl uu yahay mid ka dhaqso badan oksida inta lagu guda jiro annealing ee gaaska nitrogen leh cadaadiska qayb oksijiin hooseeya oo ka dhigan sababta ugu weyn ee nabaad guurka.

    Horudhac FeCrAl - Alloys-ku salaysan (Kanthal AF®) ayaa si fiican loogu yaqaan caabbinta oksaydhka sare ee heerkulka sare. Hantidan aadka u fiican waxay la xidhiidha samaynta miisaanka alumina ee heerkulbeegga ah ee deggan dusha sare, kaas oo ka ilaalinaya walxaha ka soo horjeeda oksaydhyo kale [1]. In kasta oo ay jiraan sifooyin iska caabbinta daxalka oo sarreeya, cimriga qaybaha laga soo saaray FeCrAl – alloys-ku-salaysan waa la xaddidi karaa haddii qaybaha ay inta badan la kulmaan baaskiil kulaylka heerkul sarreeya [2]. Mid ka mid ah sababaha tan ayaa ah in curiyaha samaynta miisaanka, aluminium, lagu isticmaalo matrix-ka aluminiumka ee aagga hoose sababtoo ah dildilaaca heerkulka-shoogga ee soo noqnoqda iyo dib u habeynta miisaanka alumina. Haddii waxa ku jira aluminiumka haray uu hoos u dhaco diirada muhiimka ah, daawadu dib uma habeyn karto cabirka ilaalinta, taasoo keenta oksaydh-goynta masiibada ah iyadoo la samaynayo oxides-ku-saleysan birta iyo chromium-ku-saleysan [3,4]. Iyada oo ku xidhan jawiga ku xeeran iyo ka-wareejinta oksaydhyada dusha sare waxay tani fududayn kartaa oksaydhaynta gudaha ama nitridation-ka iyo samaynta wejiyada aan loo baahnayn ee gobolka hoose [5]. Han iyo Young waxay muujiyeen in miisaanka alumina ee samaynta Ni Cr Al Alloys, qaab adag oo oksijiinta gudaha ah iyo nitridation ay horumariyaan [6,7] inta lagu jiro baaskiil kulaylka heerkulka sare ee jawiga hawada, gaar ahaan alloys oo ay ku jiraan nitride hore oo xooggan sida Al iyo Ti [4]. Miisaanka Chromium oxide waxaa loo yaqaanaa inay yihiin nitrogen la dabar gooyo, Cr2 N waxay u sameysaa lakab hoose ama roob gudaha ah [8,9]. Saamayntan waxa la filan karaa in ay aad u daran tahay marka la eego xaaladaha baaskiilka kulaylka taaso u horseedda dildilaaca miisaanka oksaydhka iyo yaraynta waxtarkeeda iyada oo caqabad ku ah nitrogen [6]. Dhaqanka daxalka ayaa sidaas lagu maamulaa tartanka u dhexeeya oksaydhka, taas oo horseedaysa samaynta alumina ilaalinta / dayactirka, iyo gelitaanka nitrogen ee u horseedaysa nitridation gudaha gudaha matrixka aluminiumka iyadoo la samaynayo wajiga AlN [6,10], taas oo horseedaysa qulqulka gobolkaas sababtoo ah balaadhinta kulaylka sare ee wajiga AlN marka la barbar dhigo jaantuska alloy [9]. Marka la soo bandhigo FeCrAl alloys heerkulka sare ee jawiga leh ogsijiinta ama deeq-bixiyeyaasha kale ee ogsijiinta sida H2O ama CO2, oksaydhisku waa falcelinta ugu sareysa, iyo qaababka miisaanka alumina, kaas oo aan la dhaafin karin oksijiin ama nitrogen heerkul sare oo bixiya ilaalinta ka hortagga faragelintooda gudaha matrix alloy. Laakin, haddii ay soo gaarto jawiga dhimista (N2+H2), iyo dildilaaca cabirka alumina, oxidation-ka jaban ee maxalli ah wuxuu ka bilaabmaa samaynta Cr aan difaac lahayn iyo Ferich oxides, kuwaas oo siinaya waddo wanaagsan oo loogu talagalay faafinta nitrogen ee xuubka ferritic iyo samaynta ee wajiga AlN [9]. Badbaadinta (4.6) jawiga nitrogen waxaa si joogta ah loogu dabaqaa codsiga warshadaha ee FeCrAl alloys. Tusaale ahaan, kuleyliyeyaasha iska caabbinta foornooyinka daaweynta kulaylka leh jawiga nitrogen ee ilaaliya ayaa tusaale u ah codsiga baahsan ee FeCrAl alloys ee deegaankan. Qorayaashu waxay soo wariyeen in heerka oksaydhka ee FeCrAlY Alloys uu si aad ah u gaabis yahay marka la sii daayo jawiga cadaadiska qayb ahaan oksijiin hooseeya [11]. Ujeedada daraasadda ayaa ahayd in la go'aamiyo in soo-saarista (99.996%) nitrogen (4.6) gaaska (Messer® spec. heerka wasakhda O2 + H2O <10 ppm) ay saamayso iska caabbinta daxalka ee FeCrAl alloy (Kanhal AF) iyo ilaa inta ay ku xiran tahay Heerkulka xajinta, kala duwanaanshihiisa (kulka-wareegga), iyo heerka kulaylka.

    2018-2-11 941 2018-2-11 9426 7 8


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