Phakathi kwezinhlobo ezahlukene zensimbi engagqwali, amagreyidi angu-304, 304L, kanye no-304H avame ukusetshenziswa. Nakuba zingase zibukeke zifana, ibanga ngalinye linezakhiwo zalo ezihlukile kanye nezinhlelo zokusebenza.
IbangaInsimbi engagqwali engu-304iyona esetshenziswa kakhulu futhi eguquguqukayo kakhulu kwezinsimbi ezingagqwali ezingu-300. Iqukethe i-chromium engu-18-20% kanye ne-nickel engu-8-10.5%, kanye nenani elincane le-carbon, i-manganese, ne-silicon. Leli banga linokumelana okuhle kakhulu nokugqwala kanye nokwakheka okuhle. Livame ukusetshenziswa ezisetshenziswayo njengemishini yasekhishini, ekucubungulweni kokudla, kanye nasekuhlobiseni izakhiwo.
Ipayipi lensimbi engagqwali elingu-304Lkuyinhlobonhlobo yepayipi lensimbi enekhabhoni ephansi yebanga lama-304, enokuqukethwe okuphezulu kwekhabhoni okungu-0.03%. Lokhu okuqukethwe kwekhabhoni ephansi kusiza ukunciphisa imvula ye-carbide ngesikhathi sokushisela, okwenza ifaneleke ukusetshenziswa kokushisela. Okuqukethwe kwekhabhoni ephansi kunciphisa nengozi yokuzwela, okuwukwakheka kwama-carbide e-chromium emingceleni yokusanhlamvu, okungaholela ekugqwaleni kwe-intergranular. I-304L ivame ukusetshenziswa ekushiseleni, kanye nasezindaweni lapho ingozi yokugqwala iyinkinga, njengokucubungula amakhemikhali kanye nemishini yemithi.
Insimbi engagqwali engu-304Hiyinguqulo yekhabhoni ephezulu yebanga lama-304, enokuqukethwe kwekhabhoni okusukela ku-0.04-0.10%. Okuqukethwe kwekhabhoni okuphezulu kunikeza amandla okushisa aphezulu kanye nokumelana nokuqhekeka okungcono. Lokhu kwenza i-304H ifanele ukusetshenziswa kwezinga lokushisa eliphezulu, njengemikhumbi yokucindezela, ama-heat exchanger, kanye nama-boiler ezimboni. Kodwa-ke, okuqukethwe kwekhabhoni okuphezulu kwenza i-304H ibe sengozini enkulu yokuzwela kanye nokugqwala kwe-intergranular, ikakhulukazi ekusetshenzisweni kokushisela.
Ngamafuphi, umehluko omkhulu phakathi kwala mabanga okuqukethwe yikhabhoni yawo kanye nomthelela ekufakweni kwensimbi kanye nokusetshenziswa kwezinga lokushisa eliphezulu. Ibanga 304 liyinjongo esetshenziswa kakhulu futhi evamile, kuyilapho i-304L iyisinqumo esikhethwayo sezicelo zokushisela kanye nezindawo lapho ukugqwala kuyinkinga khona. I-304H inokuqukethwe kwekhabhoni okuphezulu futhi ifanele ukusetshenziswa kwezinga lokushisa eliphezulu, kodwa ukuthambekela kwayo ekuzweleni kanye nokugqwala okuphakathi kwe-granular kudinga ukucatshangelwa ngokucophelela. Lapho ukhetha phakathi kwala mabanga, kubalulekile ukucabangela izidingo ezithile zesicelo, okuhlanganisa indawo yokusebenza, izinga lokushisa, kanye nezidingo zokushisela.
IQEMBU LASEBUKHOSINI
Ikheli
Indawo yezimboni zokuthuthukiswa kweKangsheng,
Isifunda saseWuqing, idolobha laseTianjin, eChina.
I-imeyili
Amahora
UMsombuluko-NgeSonto: Isevisi yamahora angu-24
Isikhathi sokuthunyelwe: Agasti-08-2024