Kufanele kushiwo ukuthi wonke amapayipi e-austenitic ensimbi engenasici anezici zokumelana nokugqwala, ukumelana nokushisa okuphezulu nokumelana nokucindezela okukhulu.Uma kuqhathaniswa kuphela, banezici ezihlukile ezisobala nemisebenzi:
304: Ukumelana nokugqwala okujwayelekile kanye nokushisa okuphezulu ukumelana nensimbi engenamthungo ipayipi, i-304 inokumelana kahle nokugqwala kwe-intergranular, ukusebenza okuhle kakhulu kokugqwala, ukusebenza okubandayo nokusebenza kokunyathela, futhi ingasetshenziswa njengensimbi engagqwali engashi.Ngesikhathi esifanayo, izakhiwo zemishini zensimbi zisezinhle ku -180 ° C.Esimeni sesixazululo esiqinile, insimbi inepulasitiki enhle, ukuqina nokusebenza okubandayo;inokumelana nokugqwala okuhle kuma-acid oxidizing, umoya, amanzi kanye neminye imithombo yezindaba.
I-304L iwuhlobo lwensimbi engagqwali engu-304 enokuqukethwe kwekhabhoni ephansi futhi isetshenziswa lapho kudingeka khona ukushisela.Okuqukethwe kwekhabhoni ephansi kunciphisa imvula yama-carbides endaweni ethinteke ukushisa eduze nendawo yokushisela, okungaholela ekugqwaleni kwe-intergranular (ukuhlasela kwe-weld) ezinsimbini ezingenasici kwezinye izindawo.
Ukumelana nokugqwala kwepayipi lensimbi engu-316/316L kungcono kunepayipi lensimbi engagqwali engama-304, futhi inokumelana nokugqwala okuhle ekukhiqizeni uginindela nephepha.Ngenxa yokwengezwa kwe-Mo, inokumelana nokugqwala okuhle kakhulu, ikakhulukazi ukumelana nomgodi;amandla okushisa aphezulu nawo ahle kakhulu;umsebenzi omuhle kakhulu wokuqina (obuthakathaka kazibuthe ngemuva kokucubungula);okungewona uzibuthe esimweni sesixazululo esiqinile.Iphinde ibe nokumelana kahle ne-chloride corrosion, ngakho-ke ivame ukusetshenziswa ezindaweni zasolwandle noma amaphrojekthi wokwakha ngasolwandle.
I-321 insimbi engagqwali iyipayipi yezimboni ye-Ni-Cr-Ti ye-austenitic yensimbi engagqwali, ukusebenza kwayo kufana kakhulu ne-304, kodwa ngenxa yokwengezwa kwe-titanium yensimbi, inokumelana nokugqwala okungcono kwe-intergranular namandla okushisa aphezulu.Ngenxa yokwengezwa kwe-titanium yensimbi, ilawula ngempumelelo ukwakheka kwe-chromium carbide.Insimbi engagqwali engu-321 inokuqhuma okuhle kakhulu kwezinga lokushisa eliphezulu (Ukuqhekeka Kwengcindezi) kanye nokumelana nezinga lokushisa eliphezulu kwe-creep (Creep Resistance) izakhiwo zomshini wokucindezeleka zingcono kunensimbi engagqwali engama-304.I-Ti in 321 ipayipi yensimbi engagqwali ikhona njengento yokuzinzisa, kodwa futhi iyibanga lensimbi yokushisa, elingcono kakhulu kune-316L ngokushisa okuphezulu.Inokumelana nokugqwala okuhle kuma-asidi we-organic kanye ne-inorganic wokugxila okuhlukile namazinga okushisa, ikakhulukazi emithonjeni ye-oxidizing, futhi isetshenziselwa ukwenza ama-linings namapayipi weziqukathi ze-asidi ezingagugi kanye nemishini engagugi.Inokumelana okuthile kwezinga lokushisa eliphakeme, ngokuvamile elizungeze ama-degree angu-700, futhi ivame ukusetshenziswa ezitshalweni zamandla.Kusetshenziswa emishinini yasensimini ezimbonini zamakhemikhali, amalahle kanye ne-petroleum ezidinga ukumelana okuphezulu nokugqwala komngcele wokusanhlamvu, izingxenye ezimelana nokushisa zezinto zokwakha kanye nezingxenye okunzima ukuzishisa.
I-310S: Ukumelana ne-oxidation esetshenziswa kakhulu, ukumelana nokugqwala, izinga lokushisa eliphakeme elimelana nezimboni zensimbi engenamthungo nepayipi elishiselwe ezimbonini.Ukusetshenziswa okuvamile: izinto zokwakha, izinto zamadivayisi okuhlanza izimoto.Ipayipi lensimbi engagqwali le-310S iyinsimbi engagqwali ye-austenitic chromium-nickel enokumelana okuhle kakhulu nokushisa okuphezulu kwe-oxidation, ukumelana ne-asidi ne-alkali, nokumelana nokugqwala.Ngenxa yokuqukethwe okuphezulu kwe-chromium (Cr) ne-nickel (Ni), inamandla angcono kakhulu okukhasa.Ingasebenza ngokuqhubekayo ekushiseni okuphezulu futhi inokumelana okuhle nokushisa okuphezulu.Lapho izinga lokushisa lidlula ama-800, liqala ukuthambisa, futhi ukucindezeleka okuvunyelwe kuqala ukwehla ngokuqhubekayo.Izinga lokushisa eliphezulu lesevisi ngu-1200°C, futhi izinga lokushisa lokusebenzisa okuqhubekayo lingu-1150°C.Amapayipi ensimbi amelana nokushisa okuphezulu asetshenziswa ngokukhethekile ekwenzeni amashubhu esithandweni somlilo kagesi nezinye izikhathi.Ngemva kokwandisa okuqukethwe kwekhabhoni ku-austenitic stainless steel, amandla ayathuthukiswa ngenxa yomphumela oqinile wokuqinisa isisombululo.Ukwakheka kwamakhemikhali ensimbi engagqwali ye-austenitic kusekelwe ku-chromium ne-nickel.Izakhi ezifana ne-molybdenum, i-tungsten, i-niobium ne-titanium zengezwa njengesisekelo.Ngenxa yokuthi inhlangano yayo iyisakhiwo se-cubic esigxile ebusweni, inamandla amakhulu kanye namandla okukhasa emazingeni okushisa aphezulu.
Isikhathi sokuthumela: Jan-31-2023
