Kanthal Af Alloy 837 Alchhm Alchrome y fcral alloy

Kanthal af waa bir-frimiium bir-chrominium-aluminium alfoy (fcral polioy) si loogu isticmaalo heerkulka illaa 1300 ° C (2370 ° F). Alloy-ga waxaa lagu gartaa iska caabbinta aadka u fiican iyo xasillooni aad u wanaagsan oo ka dhalata nolosha dheer.

Kan-Thal af waxaa caadiyan lagu isticmaalaa walxaha kululaynta korantada foornooyinka warshadaha iyo qalabka guryaha.

Tusaalooyinka warshadaha qalabka ee loo yaqaan 'Micka' oo loo yaqaan 'Micka' oo loogu talagalay toasters, timaha qallajiyaha, kululeeyaha cagaaran ee kululeeyaha, oo ku jira caqabadaha dhoobada leh ee kululeedka, oo lagu hayo walxaha kulul ee ganaaxa, hiitarka kuleylka, kuleylka dawada, waxyaabaha ku jira noocyada boorsada ee qoryaha hawada kulul, hiitarka kuleylka, qalajiyaha burburka.

Wax ka qabashada daraasadda hadda jirta, hababka hufnaanta ee Fcral Fcracral ee Fcral ee Fcral (Kanthal Af) inta lagu gudajiro gaaska nitrogen-ka (4.6) 900 ° C iyo 1200 ° C ayaa la qeexay. Baadhitaano is-dhaafsi ah iyo thermo-cycrotchic ah oo ay kala duwan yihiin waqtiyada soo-qaadista, heerarka kuleylka, iyo kuleylka ayaa la sameeyay. Imtixaanka ixidation ee hawada iyo gaaska nitrogen waxaa fuliyay falanqaynta heerkulka. Mickar-ka waxaa lagu gartaa iskaanka elektroopy electropy (stember edx), autx elektroncroscopy (AES), waxayna diiradda saareysaa nambalka (Fib-EDX). Natiijooyinka ayaa muujinaya in horumarka la huray uu ka dhacayo goballada dhaqanka ee maxalliga ah, oo ka kooban walxaha 'ALN wajiga' iyo sababaha waxqabadka aluminium ayna sababayaan enminitent iyo salin-darin. Hawlaha qaab dhismeedka al-nitride iyo kobaca cabirka al-oxide-ka waxay kuxirantahay xakamaynta heerkulka iyo heerka kuleylka. Waxaa la ogaaday in nitication of picral altoy uu yahay hab ka dhakhso badan oksidation inta lagu gudajiro gaaska nitrogen-ka oo leh culayska qayb ahaaneed oo hoos udhaca ah oo uu matalo sababta ugu weyn ee xaalufinta alfoy.

Hordhac Fracy-ka ku saleysan ee ku saleysan (Kanthal Af ®) ayaa caan ku ah iska caabinta ka sarreysa ee heerkulka sare ee heerkulka sare. Hantidan aad u fiican ayaa laxiriirta samaynta heerkulka heerkulka heerkulka dusha sare ee dushiisa dusha sare, kaas oo ka ilaaliya sheyga ka dhanka ah oksidation dheeraad ah [1]. In kasta oo guryaha loo yaqaan 'coicesties', oo ah inta ay ka kooban tahay inta ay ka kooban tahay qaybaha ay ka soo saareen 'Fcral' ee ku saleysan Fcral - waa la xadidi karaa haddii qaybaha had iyo jeer la kulmaan baaskiil wadida kuleylka ah [2]. Mid ka mid ah sababaha ay tani u tahay cabirka cabirka, aluminium, waxaa lagu cunaa matrix aloy ee aagga 'ploutfoface' oo ay ugu wacan tahay dilidaada naxdinta leh ee ku soo noqnoqda iyo dib-u-habeynta cabirka alumina. Haddii numinigu haray uu hoos udhaco feejignaanta muhiimka ah, allygu mar dambe dib-u-habeyn kuma sameyn karo cabirka difaaca, taasoo dhalisay musiibo-nacayb oksidation oo ku saleysan otomium-ka ku saleysan birta ku saleysan chromium-ka ah [3,4]. Iyada oo ku xidhan jawiga ku xeeran iyo dadaalka otomaatiga dusha sare tani waxay fududeyn kartaa oksidation gudaha ah ama nitirid ah iyo samaynta wejiyada aan loo baahnayn ee ku yaal gobolka dugsiga hoose ee gobolka Han iyo da 'yarta ayaa muujiyay in qiyaasta alumina ay sameeyeen NI CL al alleng oo gudaha ah, gaar ahaan jilbaha kuleylka ee jawiga hawada ku jira, gaar ahaan isbadal ku jira dhale-abuurka hawada oo ay ka kooban yihiin al iyo ti [4]. Miisaaniyada 'chromium oside' waxaa lagu yaqaanaa inuu yahay nitrogen la garan karo, iyo cr2 n foomkuba mid ka mid ah lakab hoosaad ama sida roobka gudaha ah [8,9]. Saameyntan waxaa laga fili karaa inay aad ugu sii xumaato xaaladaha baaskiil wadista kuleylka kaasoo horseedaya jaceylka qiyaasta oxide iyo yareynta wax ku oolnimadiisa sida caqabad ku ah nitrogen [6]. Akhlaaqda hufan ayaa sidaas lagu xukumaa tartanka u dhexeeya oksidation, kaas oo u horseedaya samaynta alumination-ka alusination ee matrix-ka gudaha ah oo ay ku sugnaato matrical-ka 'ALN' oo ay ku sugan tahay ballaarinta kuleylka ee 'ALN' oo ay ku jiraan ballaarinta kuleylka ee ugu sarreysa ee wejiga 'Alen' Markaad u soo bandhigayso Feejigyada Fcral illaa heerkul aad u sarreeya ee oksijiinta oksijiinta ama oksijiinka ah sida H2O ama nooca loo yaqaan 'aluminacation', oo aan la siin karin heerkulka sare, kaas oo ah kahortaga kuleylka ka-hortagga ah matrix-ka akoy. Laakiin, haddii ay u soo gaadho jawi yareynta Ilaalinta (4.6) Jawiga nitrogen-ka ayaa inta badan lagu dabaqayaa adeegsiga warshadaha ee aloy-yada fcral. Tusaale ahaan, kululayaasha iska caabbinta ee kuleylka dawada kuleylka ee leh jawiga nitrogen-ka ah waa tusaale ku saabsan dalabka baahsan ee ku jira bilaha 'Fcral' ee jawiga noocaas ah. Qorayaashu waxay soo sheegaan in heerka oksidaug-ga ee all-ka fcraly-ga uu si tartiib tartiib ah tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib tartiib ah ayuu u gaabiyaa Ujeeddada daraasadda ayaa ahayd in la go'aamiyo bal in lagu garto in lagu garto haddii lagu tacaasho haddii lagu taabto (99.996%) nitrogen (4.6) Gaas (H2O <10) PPM) iyo ilaa heerkulku wuxuu kuxiran yahay isbarbardhiga fracraal, kala duwanaanshaheeda (baaskiilkeeda), iyo heerka kuleylka.