Kanthal Af Aloy 837 Detulehm Alchrome y fecral aloy

Kanthel Af ndi chitsulo chachitsulo cha chikondwerero cha chromium-aluminiyamu chiloya (chilesi cha fecral) kuti mugwiritse ntchito kutentha mpaka 1300 ° F). The alloy imadziwika ndi kukana kwabwino kwa oxidation komanso mawonekedwe abwino kwambiri omwe ali ndi moyo wautali.

Kan-Thal nthawi zambiri amagwiritsidwa ntchito mu zinthu zamagetsi zotenthetsera m'magulu a mafakitale ndi zida zapakhomo.

Chitsanzo cha kugwiritsa ntchito mapulogalamu mu mapulogalamu a pazinthu zotseguka miyala, zowuma tsitsi, zomwe zimapangidwa ndi zibowo zamimba zophikira zophika zophika, m'magulu azovala zojambula, mmawu Zida zowongoka za ma radiators, zopatsa chidwi, muzinthu zopangira mafupa otentha mpweya, ma radiators, zowuma.

Abrstrate pophunzira pano, marofesm a alloy wachifundo (a Chalhal AF) nthawi yopanga nitrogen gasi (4.6) pa 900 ° C ndi 1200 C afotokozedwa. Mayeso a imothermal ndi a thermo-cyclic mosiyanasiyana nthawi yosiyanasiyana, yotentha, komanso kutentha kumachitika. Kuyesa kwa oxidation mu mpweya ndi nayitrogeni mpweya unachitika ndi thermagramvimetric. Microstruction imadziwika ndi scanning electromy (Sem-edx), Auger Electron Spectropy (AES), ndi mawonekedwe oyang'ana yines (fib-edx). Zotsatirazi zikuwonetsa kuti izi zikuchitika chifukwa cha mapangidwe a mapangidwe a masitepe amtundu wamkati, omwe amapangidwa ndi aln gawo la aluminium ndipo amachepetsa komanso kuwumbika. Njira za mapangidwe a al-nitride ndi kukula kwa al-oxide zimatengera kutentha kwa kutentha komanso kutentha. Zinapezeka kuti nitriation ya alloy ndi njira yofulumira kuposa maxid polpeation mu mpweya wa nayitrogeni pang'ono ndipo imayimira choyambitsa cha alyary.

Mafala Akutoma Nawo - Wosakaniza (Kanthal Af ®) amadziwika kuti ma oxida akweze anthu omwe ali ndi mwayi wowonjezera kutentha. Katundu wangwirowu ndi wokhudzana ndi mapangidwe a mafuta a alumina padziko lapansi, omwe amateteza nkhaniyo mogwirizana ndi oxidation [1]. Ngakhale kuti mukukana kuwongolera katundu, nthawi yonse ya zinthu zomwe zimapangidwa kuchokera ku zojambulazo - zomwe zimakhazikitsidwa zimatha kukhala zochepa ngati magawo nthawi zambiri amawonekera pa njinga yamatenthedwe pa kutentha kwa kutentha [2]. Chimodzi mwazifukwa zomwe izi ndikuti chinthu chopanga, aluminiyamu, chimadyedwa mu almoy matrix m'dera la alumu yobwereketsa chifukwa cha kuchuluka kwa ma alumina. Ngati zotsalazo zimachepetsa pansi pazovuta, zitsulo sizingasinthenso kuteteza, zomwe zimapangitsa oxiday oxidioni opangidwa mwachangu ndi cromium. Kutengera ndi malo ozungulira komanso kukhazikika kwa malo osungirako ma oxisisis omwe amatha kuthandizira makutita oxidation kapena niteridation ndi mapangidwe a magawo osafunikira mu SUPEVEVEVE. Han ndi achichepere awonetsa kuti alumunine sprow amapanga ma entry, makamaka pakudya kwamphamvu pamoto wokwera m'malo mwake amakhala ndi ma altide okhazikika ngati al ndi tI [4]. Masikelo a chromium oxide amadziwika kuti ndi nayitrogeni wowongoka, ndi cr2 n mafomu amtundu wa suble kapena ngati mpweya wapansi [8,9]. Izi zitha kuyembekezeredwa kukhala zowopsa pamsewu womwe umatsogolera kuti ma oxide oxi m'manja amalepheretsa ndikuchepetsa mphamvu yake ngati cholepheretsa nayitrogeni [6]. Kuchita chipongwe kumayendetsedwa ndi mpikisano pakati pa oxidation, yomwe imapangitsa kuti mapangidwe a alumina a alumina / kukonza, ndi itrogen issidation ya aln poyerekeza ndi alnoy matrix [9]. Mukamavumbula matope a zowongolera kwambiri m'milengalenga ndi oxygen kapena opereka ogula monga H2o kapena CO2, oxidations mitundu yotentha ndikuteteza kulowerera kwawo mu Aloy matrix. Koma, ngati chiritsidwa ndi madzi ochepetsa (n2 + h2), ndipo oteteza a alumina stock, oxidation am'deralo amayamba ndi mawonekedwe a cr ndi anzeru Chitetezo (4.6) cha nayirgen amagwiritsidwa ntchito kawirikawiri pakugwiritsa ntchito mafakitale a madontho. Mwachitsanzo, kukana miyambo yazakudya zamankhwala oteteza kutentha ndi mkhalidwe wa nayitrogen ndi chitsanzo cha kugwiritsa ntchito mankhwala osokoneza bongo. Olembawo akuti kwa oxidation ya ma oxidaly expraly amachepetsa kwambiri mukamayaka mlengalenga ndi ma cunial pang'ono [11]. Cholinga cha phunziroli chinali kudziwa kaya mu (99.996%) nayitrogen (4.6) Magesi (Ammer® Spection On Church)