Isingeniso
Ibanga 304 liyizinga elithi “18/8″ elingenasici;iyinsimbi engagqwali esebenza ngezindlela eziningi futhi esetshenziswa kabanzi, etholakala ezinhlobonhlobo zemikhiqizo, amafomu kanye nokuqedwa kunanoma iyiphi enye.Inezici ezinhle kakhulu zokwakha kanye ne-welding.Isakhiwo se-austenitic esilinganiselayo seBanga lama-304 siyenza ijule kakhulu ngaphandle kokuhushulwa okuphakathi nendawo, okwenze leli banga libe likhulu ekwakhiweni kwezingxenye ezingenasici ezifana nosinki, izitsha ezingenalutho kanye namasoso.Kulezi zinhlelo zokusebenza kuvamile ukusebenzisa okuhlukile okukhethekile kwe-“304DDQ” (Ikhwalithi Yokudweba Okujulile).IBanga lama-304 libhuleki kalula noma lakhiwe laba izingxenye ezihlukene zokusetshenziswa emkhakheni wezimboni, wezokwakha, nezokuthutha.Ibanga lama-304 nalo linezici zokushisela ezivelele.I-post-weld annealing ayidingeki lapho ushisela izingxenye ezincane.
I-Grade 304L, inguqulo yekhabhoni ephansi engu-304, ayidingi ukushiselwa kwangemuva kokushisela ngakho isetshenziswa kakhulu kuzingxenye zegeji esindayo (ngaphezu kuka-6mm).Ibanga 304H elinokuqukethwe kwekhabhoni ephezulu lithola ukusebenza emazingeni okushisa aphakeme.Isakhiwo se-austenitic sinikeza lawa mabanga ukuqina okuhle kakhulu, ngisho naphansi kwamazinga okushisa e-cryogenic.
Izakhiwo Eziyinhloko
Lezi zakhiwo zicaciswe kumkhiqizo ogoqeke oyisicaba (ipuleti, ishidi kanye nekhoyili) ku-ASTM A240/A240M.Izakhiwo ezifanayo kodwa ezingafani ngempela zicaciswe kweminye imikhiqizo efana nepayipi nebha ngokucaciswa kwazo.
Ukwakheka
Ububanzi obujwayelekile bokuqamba bebanga lama-304 bunikezwa kuthebula loku-1.
| Ibanga | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | imiz. ubuningi. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
| 304L | imiz. ubuningi. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
| 304H | imiz. ubuningi. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | |
Ithebula 1.Ibanga lokuhlanganisa lensimbi engagqwali engu-304
Izakhiwo Zemishini
Izakhiwo ezijwayelekile zomshini zezinsimbi ezingenasici zebanga lama-304 zinikezwe kuthebula lesi-2.
Ithebula 2.Izakhiwo zemishini yensimbi engagqwali engu-304
| Ibanga | Amandla E-Tensile (MPa) min | Amandla Esivuno 0.2% Ubufakazi (MPa) min | Ubude (% ku-50mm) min | Ukuqina | |
| I-Rockwell B (HR B) ubuningi | I-Brinell (HB) ubuningi | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
| 304L | 485 | 170 | 40 | 92 | 201 |
| 304H | 515 | 205 | 40 | 92 | 201 |
| I-304H nayo inesidingo sikasayizi wokusanhlamvu we-ASTM No 7 noma ngaphezulu. | |||||
Ukumelana Nokugqwala
Kuhle kakhulu endaweni ebanzi yomoya kanye nemithombo yezindaba egqwalile.Kungaphansi kokugqwala nokugqwala ezindaweni ezifudumele ze-chloride, kanye nokugcizelela ukuqhekeka kokugqwala okungaphezu kuka-60°C.Kucatshangwa ukuthi imelana namanzi aphuzwayo ane-chloride efika ku-200mg/L emazingeni okushisa azungezile, ehle aze afike ku-150mg/L ku-60°C.
Ukumelana Nokushisa
Ukumelana okuhle kwe-oxidation kusevisi yesikhashana kufika ku-870°C futhi kusevisi eqhubekayo kufika ku-925°C.Ukusetshenziswa okuqhubekayo kwe-304 kububanzi obungu-425-860°C akunconywa uma ukumelana nokugqwala okulandelayo kubalulekile.I-Grade 304L imelana kakhulu nemvula ye-carbide futhi ingashiswa ebangeni lokushisa elingenhla.
IBanga 304H linamandla aphezulu emazingeni okushisa aphakeme ngakho-ke livame ukusetshenziselwa izinhlelo zokusebenza zesakhiwo kanye nengcindezi emazingeni okushisa angaphezu kuka-500°C futhi afika cishe ku-800°C.I-304H izokwaziswa ezingeni lokushisa elingu-425-860°C;lokhu akuyona inkinga ekusetshenzisweni kwezinga lokushisa eliphezulu, kodwa kuzoholela ekunciphiseni ukumelana nokugqwala kwe-aqueous.
Ukwelashwa Kokushisa
Ukwelashwa Kwesixazululo (Annealing) – Shisisa ufike ku-1010-1120°C futhi uphole ngokushesha.Lawa mabanga awakwazi ukwenziwa lukhuni ukwelashwa okushisayo.
Ukushisela
Ukushisela okuhle kakhulu ngazo zonke izindlela ezijwayelekile zokuhlanganisa, zombili ezinezinsimbi zokugcwalisa nezingenazo.I-AS 1554.6 ifanelekela ngaphambili ukushisela okungu-304 ngeBanga 308 kanye no-304L ngezinduku noma ama-electrode angu-308L (kanye nokulingana kwawo okuphezulu kwe-silicon).Izingxenye ezishiselwe kakhulu zeBanga lama-304 zingase zidinge i-post-weld annealing ukuze zimelane nokugqwala okukhulu.Lokhu akudingekile eBangeni 304L.IBanga lama-321 lingase lisetshenziswe njengenye indlela ye-304 uma ukushisela kwesigaba esindayo kuyadingeka futhi ukwelashwa kokushisa kwangemuva kwe-weld kungenakwenzeka.
Izinhlelo zokusebenza
Izinhlelo zokusebenza ezijwayelekile zifaka:
Imishini yokucubungula ukudla, ikakhulukazi ekuphiseni ubhiya, ekucubunguleni ubisi nokwenza iwayini.
Amabhentshi asekhishini, osinki, imikhombe, izinto zokusebenza kanye nemishini
Amaphaneli e-Architectural, railings & trim
Iziqukathi zamakhemikhali, okuhlanganisa nezokuthutha
Izishintshi Zokushisa
Izikrini ezilukiwe noma ezishiselwe zokumba izimayini, izinkwali kanye nokuhlunga amanzi
Ama-fasteners anemicu
Iziphethu