Izinto ezisemgangathweni ze-254SMO zihlala zinexabiso elisemgangathweni elisemgangathweni ekubunjweni kweekhemikhali, icandelo ngalinye linomsebenzi walo:
I-Nickel (Ni): I-Nickel inokunyusa amandla ensimbi ye-254SMO ngelixa igcina iplastiki elungileyo kunye nokuqina. I-nickel inokumelana ne-corrosion ephezulu kwi-asidi kunye ne-alkali, kwaye inomhlwa kunye nokumelana nobushushu kumaqondo aphezulu.
I-Molybdenum (Mo): I-Molybdenum inokucoca ingqolowa ye-254SMO yensimbi, iphucule ukuqina kunye nokuqina kwe-thermal, kwaye igcine amandla okwaneleyo kunye nokuxhatshazwa kwe-creep kumaqondo okushisa aphezulu (uxinzelelo lwexesha elide kumaqondo aphezulu, ukuguqulwa, ukuguquka kwezilwanyana ezinwabuzelayo).
I-Titanium (Ti): I-Titanium yi-deoxidizer eyomeleleyo kwintsimbi ye-254SMO. Inokwenza ulwakhiwo lwangaphakathi lwentsimbi exineneyo, lucokise amandla okuziinkozo; ukunciphisa ubuntununtunu bobudala kunye nokubanda brittleness. Ukuphucula ukusebenza kwe-welding. Ukongezwa kwe-titanium efanelekileyo kwi-chromium 18 nickel 9 i-austenitic stainless steel ikhusela i-intergranular corrosion.
I-Chromium (i-Cr): I-Chromium inokuphucula ukuxhathisa kwentsimbi kwaye ngoko yinto ebalulekileyo ye-alloying ye-254SMO yensimbi engenasici kunye ne-heat-resistant steel.
Ubhedu (Cu): I-Copper inokunyusa amandla kunye nokuqina, ngakumbi kwi-corrosion ye-atmospheric. Ukungalungi kukuba i-brittleness eshushu ivame ukwenzeka ngexesha lokusebenza okushushu kwaye iplastiki yobhedu idlula i-0.5%. Xa umxholo wobhedu ungaphantsi kwe-0.50%, akukho mpembelelo kwi-solderability yezinto ze-254SMO.
Ngokusekwe kumahluko kula macandelo aphambili angasentla, ezi ntlobo zilandelayo ze-254SMO nickel alloys zingasetyenziswa:
1. I-nickel-copper (Ni-Cu) i-alloy, eyaziwa ngokuba yi-Monel alloy (i-Monel alloy)
2. I-nickel-chromium (Ni-Cr) i-alloy yi-nickel-based alloy-resistant heat.
3. I-Ni-Mo ingxubevange ibhekiselele kwi-Hastelloy B series
4. Ingxubevange ye-Ni-Cr-Mo ikakhulu ibhekisa kuthotho lweHastelloy C
I-254SMO isetyenziswa kwizixhobo ezahlukeneyo zemizi-mveliso, ukusetyenziswa kwayo kwangaphakathi kwemithombo yamagqabi, imithombo yekhoyili, iindawo zokutywina, ukukhupha iimoto ezininzi, ii-catalytic converters, ii-coolers ze-EGR, ii-turbocharges kunye nezinye iigasket ezikwaziyo ukumelana nobushushu, iipleyiti ze-Austenitic stainless steel zisetyenziselwa amalungu adibeneyo.
Ngokukodwa, inxalenye yezicelo zezixhobo ezahlukeneyo zemizi-mveliso, i-gaskets yokukhupha iimoto, njl.njl. esetyenziswa phantsi kobushushu obuphezulu isebenzisa i-NPF625 kunye ne-NCF718 echazwe kwi-JIS G 4902 (i-corrosion-resistant kunye ne-heat-resistant superalloy plate) ukuze iqulethe iipesenti zobuninzi. Ingaphezulu kwe-50% yezinto ezibizayo ze-Ni. Ngakolunye uhlangothi, kwizinto ezifana ne-precipitation-enhanced steel stainless steel ezifana ne-SUH660 esebenzisa i-intermetallic compounds ye-Ti kunye ne-Al echazwe kwi-JIS G 4312 (ipleyiti yensimbi ekwazi ukumelana nobushushu), ukuqina kwe-254 SMO kuncipha kakhulu xa isetyenziselwa ixesha elide. ixesha kumaqondo okushisa aphezulu, kwaye kuphela Ukusetyenziswa ukuya kuthi ga kwi-500 ° C awanelisi iimpawu ezifunekayo kwii-gaskets ezichasene nokushisa eziye zakhuthazwa ngukushisa okuphezulu kwiminyaka yamuva.
Uphawu: 254SMO
Imigangatho yeSizwe: 254SMO/F44 (UNS S31254/W.Nr.1.4547)
Amaqabane: Outokumpu, AVESTA, Hastelloy, SMC, ATI, Germany, ThyssenKrupp VDM, Mannex, Nickel, Sandvik, Sweden Japan Metallurgical, Nippon Steel kunye nezinye iimpawu ezidumileyo
Uphawu lwaseMelika: UNS S31254
Isishwankathelo se-254SMo (S31254): I-super austenitic steel stainless. Ngenxa yomgangatho wayo ophezulu we-molybdenum, inokuxhathisa okuphezulu kakhulu kwi-pitting kunye ne-corrosion. I-254SMo yentsimbi engenastainless yaphuhliswa yaze yaphuhliswa ukuba isetyenziswe kwiindawo ezine-halide ezifana namanzi olwandle.
I-254SMo (S31254) I-Super Stainless Steel luhlobo olukhethekileyo lwensimbi engenasici. Ihluke kwintsimbi eqhelekileyo engenasici ngokwemichiza. Ibhekiselele kwintsimbi yealloyi ephezulu ene-nickel ephezulu, i-chromium ephezulu, kunye ne-molybdenum ephezulu. I-Super stainless steel, i-alloy esekelwe kwi-nickel luhlobo olukhethekileyo lwensimbi engenasici, i-chemical composition yokuqala ihluke kwintsimbi eqhelekileyo, ibhekisela kwi-alloy ephezulu equkethe i-nickel ephezulu, i-chromium ephezulu, i-high-molybdenum insimbi engenasici. Eyona nto ingcono yi-254Mo, equkethe i-6% ye-Mo. Olu hlobo lwensimbi lunokuchasana okuhle kakhulu kwi-corrosion yendawo. Inokumelana kakuhle ne-corrosion yemigodi phantsi kwamanzi olwandle, i-aeration, i-gap, kunye neemeko zokukhukuliseka kwesantya esisezantsi (PI ≥ 40) kunye noxinzelelo olungcono lokumelana nokubola, ezinye izinto ze-Ni-based alloys kunye ne-titanium alloys. Okwesibini, kubushushu obuphezulu okanye ukusebenza kokumelana nokugqwala, kunokumelana ngcono nobushushu obuphezulu okanye ukumelana nokugqwala, yintsimbi engama-304 engenakutshintshwa. Ukongezelela, ukusuka kulwahlulo lwensimbi engenasici, i-metallographic ekhethekileyo yensimbi engenasici yi-stable austenite metallographic structure. Ngenxa yokuba le ntsimbi ikhethekileyo luhlobo lwemathiriyeli ye-alloy ephezulu, inzima kakhulu kwinkqubo yokuvelisa. Ngokuqhelekileyo, abantu banokuthembela kuphela kwinkqubo yemveli yokuvelisa le ntsimbi ekhethekileyo engenasici, njengokugalela, ukubumba, ukuqengqeleka njalo njalo.
Kwangaxeshanye ineempawu zokumelana nobushushu obuphezulu ngolu hlobo lulandelayo:
1. Inani elikhulu leemvavanyo zentsimi kunye namava amaninzi abonisa ukuba nakumaqondo okushisa aphakamileyo, i-254SMO inokumelana ne-corrosion ephezulu ye-crevice kumanzi olwandle, kwaye kuphela iintlobo ezimbalwa zensimbi ezingenasici ezinale propati.
2. Ukuxhatshazwa kwe-corrosion ye-254SMO kwiisombululo ze-acidic kunye ne-oxidizing halide solutions ezifana nezo zifunekayo kwimveliso ye-bleach esekelwe ephepheni inokuthelekiswa ne-alloys ye-nickel-base kunye ne-titanium alloys echasene kakhulu ne-corrosion.
Ixesha lokuposa: Apr-24-2018