Kanthal AF alloy 837 resistohm alchrome Y fecral alloy

Kanthal AF bụ iron-chromium-aluminium alloy (FeCrAl alloy) maka ojiji na okpomọkụ ruo 1300°C (2370°F).The alloy e ji mara mma ọxịdashọn nguzogide na nnọọ mma ụdị kwụsie ike na-akpata ogologo mmewere ndụ.

A na-ejikarị Kan-thal AF eme ihe na ọkụ eletrik n'ime ọkụ ụlọ ọrụ na ngwa ụlọ.

Ihe atụ nke ngwa dị na ụlọ ọrụ ngwa bụ na ihe ndị na-emeghe mica maka toasters, ndị na-ehicha ntutu, na ihe ndị na-emepụta ihe maka ndị na-ekpo ọkụ fan yana dị ka ihe na-emepe emepe na eriri mkpuchi ihe na seramiiki iko top heaters na ranges, na seramiiki heaters maka esi efere, coils. na eriri seramiiki a kpụrụ akpụ maka efere esi nri na hobs seramiiki, n'ime ihe mkpuchi mkpuchi a kwụsịrị maka ndị na-ekpo ọkụ fan, na ihe ndị kwụsiri ike na waya maka radiators, ndị na-ekpo ọkụ convection, na ihe anụ ezi maka egbe ikuku na-ekpo ọkụ, radiators, ọkpọ nkụ.

Abstract N'ime ọmụmụ ihe ugbu a, a kọwapụtara usoro corrosion nke azụmahịa FeCrAl alloy (Kanhal AF) n'oge annealing na nitrogen gas (4.6) na 900 Celsius C na 1200 Celsius C.A na-eme ule Isothermal na thermo-cyclic nwere oge mkpughe dị iche iche, ọnụego ikpo ọkụ na okpomọkụ na-ekpo ọkụ.Emere ule oxidation na ikuku ikuku na nitrogen site na nyocha thermogravimetric.Ihe e ji mara microstructure bụ site na nyocha eletrọn microscopy (SEM-EDX), Auger electron spectroscopy (AES), na nyocha ion beam (FIB-EDX).Nsonaazụ na-egosi na ọganihu nke corrosion na-ewere ọnọdụ site na nhazi mpaghara nitridation subsurface nke dị n'okpuru ala, nke mejupụtara akụkụ nke AlN, nke na-ebelata ọrụ aluminom ma na-akpata embrittlement na spallation.Usoro nhazi nke Al-nitride na uto Al-oxide na-adabere na okpomọkụ na-ekpo ọkụ na ọnụego kpo oku.Achọpụtara na nitridation nke FeCrAl alloy bụ usoro ngwa ngwa karịa oxidation n'oge annealing na gas nitrogen nwere obere ikuku oxygen dị ala ma na-anọchite anya isi ihe na-akpata mbibi alloy.

Okwu Mmalite FeCrAl – alloys dabere (Kanhal AF ®) bụ onye amara nke ọma maka nguzogide oxidation ha dị elu na oke okpomọkụ.Ngwongwo a magburu onwe ya metụtara nguzobe nke alumina kwụsiri ike nke ọma n'elu, nke na-echebe ihe ahụ pụọ na oxidation ọzọ [1].N'agbanyeghị ihe ndị na-eguzogide corrosion dị elu, oge ndụ ihe ndị a na-emepụta na FeCrAl- alloys nwere ike ịbelata ma ọ bụrụ na akụkụ ahụ na-emekarị ka ịgba ígwè na-ekpo ọkụ na okpomọkụ dị elu [2].Otu n'ime ihe kpatara nke a bụ na a na-eri ihe na-emepụta ọnụ ọgụgụ, aluminum, na matrix alloy na mpaghara dị n'okpuru ala n'ihi mgbawa ọkụ na-ekpo ọkụ na-emegharị ugboro ugboro na nhazigharị nke alumina.Ọ bụrụ na ọdịnaya aluminom fọdụrụnụ na-ebelata n'okpuru ntinye uche dị oke egwu, alloy enweghịzi ike imezigharị nha nchedo, na-ebute oke mbibi oxidation site n'ichepụta oxides nke sitere na ígwè na chromium na-eto ngwa ngwa [3,4].Dabere na ikuku gburugburu na permeability nke elu oxides nke a nwere ike ịkwado oxidation ọzọ dị n'ime ma ọ bụ nitridation na nhazi usoro na-adịghị mma na mpaghara dị n'okpuru ala [5].Han na Young egosila na n'ọtụtụ alumina na-akpụ Ni Cr Al alloys, usoro mgbagwoju anya nke oxidation na nitridation na-etolite [6,7] n'oge ịgba ígwè na-ekpo ọkụ na okpomọkụ dị elu na ikuku ikuku, karịsịa na alloys nke nwere nitride mbụ dị ka Al. na Ti [4].A maara akpịrịkpa chromium oxide ka ọ bụrụ nitrogen permeable, na Cr2 N na-etolite ma ọ bụ n'ụdị oyi akwa ma ọ bụ dị ka mkpọda n'ime [8,9].Enwere ike ịtụ anya na mmetụta a ga-akawanye njọ n'okpuru ọnọdụ ịgba ígwè na-ekpo ọkụ nke na-eduga n'ịgbawa ọnụ ọgụgụ oxide na ibelata irè ya dị ka ihe mgbochi na nitrogen [6].A na-achịkwa omume mmebi ahụ site na asọmpi dị n'etiti oxidation, nke na-eduga n'ichebe alumina na-echebe / na-edozi ya, na ntinye nitrogen na-eduga n'ime nitridation nke matrix alloy site na nhazi nke AlN Phase [6,10], nke na-eduga na spallation nke mpaghara ahụ n'ihi mgbasawanye okpomọkụ dị elu nke oge AlN ma e jiri ya tụnyere matrix alloy [9].Mgbe ikpughe FeCrAl alloys na okpomọkụ dị elu na ikuku oxygen ma ọ bụ ndị na-enye oxygen ndị ọzọ dị ka H2O ma ọ bụ CO2, oxidation bụ mmeghachi omume na-achịkwa, na ụdị alumina, nke na-enweghị ike ịnweta oxygen ma ọ bụ nitrogen na okpomọkụ dị elu ma na-enye nchebe pụọ na ntinye ha n'ime ụlọ. alloy matrix.Mana, ọ bụrụ na ekpughere ya na ikuku mbelata (N2 + H2), yana mgbawa alumina na-echebe, oxidation nke mpaghara na-amalite site na nguzobe nke Cr na Ferich oxides na-adịghị echebe, nke na-enye ụzọ dị mma maka mgbasa nitrogen n'ime matrix ferritic na nhazi. Usoro AlN [9].A na-etinye ikuku nitrogen na-echebe (4.6) ugboro ugboro na ngwa nrụpụta nke FeCrAl alloys.Dịka ọmụmaatụ, ndị na-ekpo ọkụ na-eguzogide ọkụ n'ọkụ ọgwụgwọ okpomọkụ nwere ikuku nitrogen na-echebe bụ ihe atụ nke ngwa niile nke FeCrAl alloys na mpaghara dị otú ahụ.Ndị ode akwụkwọ na-akọ na ọnụ ọgụgụ oxidation nke alloys FeCrAlY na-eji nwayọ nwayọ mgbe ọ na-agbaze na ikuku ikuku nwere obere nrụgide akụkụ oxygen [11].Ebumnuche nke ọmụmụ ahụ bụ iji chọpụta ma annealing na (99.996%) nitrogen (4.6) gas (Messer® spec. adịghị ọcha larịị O2 + H2O <10 ppm) na-emetụta corrosion resistance nke FeCrAl alloy (Kanhal AF) na ruo ókè ọ dabere. na annealing okpomọkụ, ya mgbanwe (thermal-cycling), na okpomọkụ okpomọkụ.