Izinto zekhwalithi ze-254SMO zihlala zinenani elijwayelekile eliphelele ekwakhiweni kwamakhemikhali azo, ingxenye ngayinye inomsebenzi wayo:
I-Nickel (Ni): I-Nickel ingandisa amandla ensimbi engu-254SMO ngenkathi igcina i-plasticity enhle nokuqina. I-Nickel inokumelana okuphezulu kokugqwala kuma-acid nama-alkali, futhi inokumelana nokugqwala nokushisa emazingeni okushisa aphezulu.
I-Molybdenum (Mo): I-Molybdenum ingacwengisisa inhlamvu yensimbi engu-254SMO, ithuthukise ukuqina kwayo kanye namandla ayo okushisa, futhi igcine amandla anele kanye nokumelana nokukhasa emazingeni okushisa aphezulu (ukucindezeleka kwesikhathi eside emazingeni okushisa aphezulu, ukuguquka, ukushintsha kokukhasa).
I-Titanium (Ti): I-Titanium iyi-deoxidizer enamandla ensimbini engu-254SMO. Ingenza isakhiwo sangaphakathi sensimbi sibe sikhulu, ithuthukise amandla okusanhlamvu; inciphise ukuzwela kokuguga kanye nokuqhekeka kokubanda. Thuthukisa ukusebenza kokushisela. Ukwengeza i-titanium efanele ku-chromium 18 nickel 9 austenitic stainless steel kuvimbela ukugqwala kwe-intergranular.
I-Chromium (Cr): I-Chromium ingathuthukisa ukumelana nokugqwala kwensimbi ngakho-ke iyisici esibalulekile sokuhlanganiswa kwensimbi engagqwali engu-254SMO kanye nensimbi engashisi.
Ithusi (Cu): Ithusi lingandisa amandla nokuqina, ikakhulukazi lapho kugqwala emoyeni. Okubi ukuthi ukuqhekeka okushisayo kuvame ukwenzeka ngesikhathi sokusebenza okushisayo futhi ukuqina kwethusi kudlula u-0.5%. Uma okuqukethwe kwethusi kungaphansi kuka-0.50%, akukho mphumela ekushiseni kwezinto ze-254SMO.
Ngokusekelwe kumehluko ezingxenyeni eziyinhloko ezingenhla, izinhlobo ezilandelayo zama-alloy e-nickel angu-254SMO zingasetshenziswa:
1. Ingxubevange ye-nickel-copper (Ni-Cu), eyaziwa nangokuthi ingxubevange ye-Monel (ingxubevange ye-Monel)
2. I-alloy ye-nickel-chromium (Ni-Cr) iyi-alloy evikela ukushisa esekelwe ku-nickel.
3. I-Ni-Mo alloy ibhekisela kakhulu ochungechungeni lwe-Hastelloy B
4. I-alloy ye-Ni-Cr-Mo ibhekisela kakhulu ochungechungeni lwe-Hastelloy C
I-254SMO isetshenziswa emishinini eyahlukahlukene yezimboni, ukusetshenziswa kwayo kwangaphakathi kweziphethu zamaqabunga, iziphethu ze-coil, izingxenye zokuvala, ama-manifolds e-exhaust ezimoto, ama-catalytic converters, ama-EGR coolers, ama-turbocharger kanye namanye ama-gasket amelana nokushisa, amapuleti ensimbi engagqwali e-Austenitic ezindiza asetshenziselwa izingxenye zamalunga.
Ikakhulukazi, ingxenye yezicelo zemishini ehlukahlukene yezimboni, ama-gasket e-exhaust emoto, njll. asetshenziswa ngaphansi kokushisa okuphezulu isebenzisa i-NPF625 kanye ne-NCF718 echazwe ku-JIS G 4902 (ipuleti le-superalloy elimelana nokugqwala kanye nelimelana nokushisa) ukuqukatha amaphesenti amaningi. Ingaphezu kuka-50% wezinto ezibizayo ze-Ni. Ngakolunye uhlangothi, ezintweni ezifana nensimbi engagqwali ethuthukisiwe njenge-SUH660 esebenzisa ama-intermetallic compounds e-Ti kanye ne-Al echazwe ku-JIS G 4312 (ipuleti lensimbi elimelana nokushisa), ubulukhuni be-254 SMO buyehla kakhulu uma busetshenziswa isikhathi eside emazingeni okushisa aphezulu, futhi kuphela Ukusetshenziswa okufika ku-500°C akwanelisi izici ezidingekayo kuma-gasket amelana nokushisa akhuthazwe ukushisa okuphezulu eminyakeni yamuva.
Ibhrendi: 254SMO
Izindinganiso zikazwelonke: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Ozakwethu: I-Outokumpu, i-AVESTA, i-Hastelloy, i-SMC, i-ATI, iJalimane, i-ThyssenKrupp VDM, i-Mannex, i-Nickel, i-Sandvik, i-Sweden i-Japan Metallurgical, i-Nippon Steel kanye neminye imikhiqizo edumile
Uhlobo lwaseMelika: UNS S31254
Ukubuka konke kwe-254SMo (S31254): Insimbi engagqwali e-super austenitic. Ngenxa yokuqukethwe kwayo okuphezulu kwe-molybdenum, inokumelana okuphezulu kakhulu nokugqwala kwemigodi kanye ne-crevice. Insimbi engagqwali ye-254SMo yathuthukiswa futhi yathuthukiswa ukuze isetshenziswe ezindaweni eziqukethe i-halide njengamanzi olwandle.
I-254SMo (S31254) I-Super Stainless Steel uhlobo olukhethekile lwensimbi engagqwali. Ihlukile kwensimbi engagqwali evamile ngokwesakhiwo samakhemikhali. Ibhekisela ensimbi engagqwali ene-alloy ephezulu equkethe i-nickel ephezulu, i-chromium ephezulu, kanye ne-molybdenum ephezulu. I-Super stainless steel, i-alloy esekelwe ku-nickel iwuhlobo olukhethekile lwensimbi engagqwali, ukwakheka kwamakhemikhali kokuqala kuhlukile kwensimbi engagqwali evamile, ibhekisela engxubeni ephezulu equkethe i-nickel ephezulu, i-chromium ephezulu, i-molybdenum ephezulu. Engcono kakhulu yi-254Mo, equkethe i-6% Mo. Lolu hlobo lwensimbi lunokumelana okuhle kakhulu nokugqwala kwendawo. Lunokumelana okuhle nokugqwala okufakwe ngaphansi kwamanzi olwandle, umoya, izikhala, kanye nezimo zokuguguleka kwejubane eliphansi (PI ≥ 40) kanye nokumelana okungcono kokugqwala kokucindezeleka, ezinye izinto ezisetshenziswayo zama-alloy asekelwe ku-Ni kanye nama-alloy e-titanium. Okwesibili, ekusebenzeni okuphezulu kokushisa noma ukumelana nokugqwala, inokumelana okungcono nokumelana nokushisa okuphezulu noma ukugqwala, i-304 insimbi engagqwali ayikwazi ukushintshwa. Ngaphezu kwalokho, kusukela ekuhlukanisweni kwensimbi engagqwali, isakhiwo esikhethekile sensimbi engagqwali se-metallographic siyisakhiwo esizinzile se-austenite metallographic. Ngenxa yokuthi le nsimbi engagqwali ekhethekile iwuhlobo lwezinto ezixutshwe kakhulu, iyinkimbinkimbi kakhulu enkambisweni yokukhiqiza. Ngokuvamile, abantu bangathembela kuphela enkambisweni yendabuko yokukhiqiza le nsimbi engagqwali ekhethekile, njengokuthulula, ukufaka, ukugoqa njalo njalo.
Ngesikhathi esifanayo inezici zokumelana nokushisa okuphezulu kanje:
1. Inani elikhulu lokuhlolwa kwasensimini kanye nokuhlangenwe nakho okubanzi kubonisa ukuthi ngisho nasezingeni lokushisa eliphakeme kancane, i-254SMO inokumelana nokugqwala okuphezulu emanzini olwandle, futhi zimbalwa izinhlobo zensimbi engagqwali ezinalesi sici.
2. Ukumelana nokugqwala kwe-254SMO ezixazululweni ze-acidic kanye nezixazululo ze-halide ezi-oxidizing njengalezo ezidingekayo ekukhiqizweni kwe-bleach ephepheni kungaqhathaniswa nezinsimbi ze-nickel-base kanye nezinsimbi ze-titanium ezimelana kakhulu nokugqwala.
Isikhathi sokuthunyelwe: Ephreli-24-2018