Isingeniso
Ibanga 304 liyizinga “18/8″ engagqwali; iyinsimbi engagqwali esebenza ngezindlela eziningi futhi esetshenziswa kabanzi, etholakala ezinhlobonhlobo zemikhiqizo, amafomu kanye nokuqedwa kunanoma yimuphi omunye. Inezici ezinhle kakhulu zokwakha nokushisela. izingxenye ezingenasici ezinjengamasinki, izitsha ezingenalutho kanye namasoso Kulezi zinhlelo zokusebenza kuvamile ukusebenzisa okukhethekile kwe-"304DDQ" (Ikhwalithi Yokudweba Okujulile) i-brake noma i-roll eyakhiwe yaba izingxenye ezihlukahlukene zokufaka izicelo ezimbonini zemboni, zezakhiwo, nezokuthutha lapho ukushisela kungadingeki izigaba.
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
