904L ni icyuma kidashonga cyane kandi gifite karubone nkeya kandi gifite aloi nyinshi ya austenitic. Kongeramo umuringa kuri ubu buryo bituma irushaho kurwanya aside nyinshi zigabanya ubukana, cyane cyane aside sulfure. Irwanya cyane chloride - haba kwangirika kw'ibinogo / scarves ndetse no kwangirika kw'ibinogo.
Iyi grade ntabwo ikoresha ingufu za rukuruzi mu bihe byose kandi ifite ubushobozi bwo gusudira no gukora neza. Imiterere ya austenitic inatuma iyi grade ikomera cyane, ndetse no mu bushyuhe bukabije.
904L ifite ibintu byinshi bihendutse bya nickel na molybdenum. Uburyo bwinshi ubu bwoko bwakoreshejwemo mbere bushobora gukoreshwa ku giciro gito hakoreshejwe icyuma gikozwe mu cyuma gikozwe mu buryo bwa duplex 2205 (S31803 cyangwa S32205), bityo ikaba idakunze gukoreshwa cyane ugereranyije n'igihe cyashize.
Imiterere y'ingenzi
Iyi miterere yagenwe ku gicuruzwa gipfundikiye (isahani, urupapuro n'uruziga) muri ASTM B625. Imiterere isa ariko ntabwo ari ngombwa ko isa yagenwe ku bindi bicuruzwa nk'umuyoboro, umuyoboro n'umugozi mu buryo bujyanye na byo.
Imiterere
Imbonerahamwe ya 1.Ingano y'ibikubiye mu byuma bitagira umugese bya 904L.
| Icyiciro | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | umunota. ntarengwa. | - 0.020 | - 2.00 | - 1.00 | - 0.045 | - 0.035 | 19.0 23.0 | 4.0 5.0 | 23.0 28.0 | 1.0 2.0 |
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Imiterere ya mekanike
Imbonerahamwe ya 2.Imiterere ya tekiniki y'ibyuma bitagira umugese bya 904L.
| Icyiciro | Ingufu zo Gufata (MPa) umunota | Ingufu z'umusaruro 0.2% Ubuhamya (MPa) min | Uburebure (% muri mm 50) | Ubukomere | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 bisanzwe | - |
| Ingano y'agaciro ka Rockwell ni isanzwe gusa; izindi ndangagaciro ni imipaka yagenwe. | |||||
Imiterere Ifatika
Imbonerahamwe ya 3.Imiterere isanzwe y'ibyuma bitagira umugese bya 904L.
| Icyiciro | Ubucucike | Modulus irashya | Igipimo cy'ikwirakwizwa ry'ubushyuhe (µm/m/°C) | Ubushobozi bwo gutwara ubushyuhe | Ubushyuhe bwihariye 0-100°C | Ubushobozi bwo kwirinda amashanyarazi | |||
| 0-100°C | 0-315°C | 0-538°C | Kuri 20°C | Kuri 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Igereranya ry'Ibipimo by'Icyiciro
Imbonerahamwe ya 4.Ibipimo by'urwego rw'ibyuma bitagira umugese bya 904L.
| Icyiciro | Nomero ya UNS | Umwongereza wa kera | Euronorm | SS yo muri Suwede | JIS y'Abayapani | ||
| BS | En | No | Izina | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| Izi gereranya ni izegeranyo gusa. Urutonde rugamije kugereranya ibikoresho bisa mu mikorerentabwonk'ingengabihe y'ibihwanye n'amasezerano. Niba bikenewe ibihwanye neza bigomba kwitabwaho. | |||||||
Amanota Ashoboka yo Guhindura
Imbonerahamwe ya 5.Ingano zishobora guhindurwa aho gukoresha icyuma cya 904L.
| Icyiciro | Impamvu ishobora gutorwa aho guhitamo 904L |
| 316L | Ubundi buryo buhendutse, ariko bufite ubushobozi bwo kurwanya ingese buke cyane. |
| 6mo | Hakenewe ubudahangarwa bukomeye ku kurwanya ingese n'imyobo. |
| 2205 | Irwanya ingese bisa cyane, aho 2205 ifite imbaraga nyinshi za mekanike, kandi ku giciro gito cya 904L. (2205 ntikwiriye ubushyuhe buri hejuru ya 300°C.) |
| Super duplex | Hakenewe ubudahangarwa bwinshi bwa corruption, hamwe n'imbaraga zirenze 904L. |
Ubudahangarwa bw'inkongi
Nubwo yakozwe mbere kubera ko irwanya aside sulfurike, inarwanya cyane ibidukikije bitandukanye. Ingano ya 35 igaragaza ko ibi binyabutabire bifite ubudahangarwa bwiza ku mazi ashyushye yo mu nyanja n'ibindi bidukikije birimo chloride nyinshi. Ingano nyinshi ya nikeli ituma irwanya cyane kwangirika kw'ibinyabutabire kurusha ingano isanzwe ya austenitic. Umuringa wongera ubudahangarwa kuri aside sulfurike n'izindi zigabanya ubukana, cyane cyane mu cyiciro cy' "ubukana bwo hagati".
Mu bidukikije byinshi, 904L ifite ubushobozi bwo kwangirika hagati ya 316L isanzwe ya austenitic na 6% ya molybdenum ivanze cyane n'ubwoko busa na "super austenitic".
Mu aside nitrike ikomeye, 904L ifite ubushobozi bwo kurwanya ibiyobyabwenge bike ugereranyije n’ibipimo bidafite molybdenum nka 304L na 310L.
Kugira ngo icyuma kidacika cyane mu bihe bikomeye, kigomba kuvurwa nyuma yo gukonjesha.
Ubudahangarwa bw'ubushyuhe
Irwanya ogisijeni neza, ariko kimwe n'izindi ngano zivanze cyane ihura n'ikibazo cyo kudakomera kw'imiterere (imvura igwa bitewe n'ibihe byoroshye nka sigma) ku bushyuhe buri hejuru. 904L ntigomba gukoreshwa hejuru ya 400°C.
Uburyo bwo kuvura ubushyuhe
Uburyo bwo Gutunganya Umuti (Annealing) – shyushya kugeza kuri 1090-1175°C kandi ukonje vuba. Ubu buryo ntibushobora gukomera hakoreshejwe uburyo bwo gushyushya.
Gusudira
904L ishobora gusudira neza hakoreshejwe uburyo bwose busanzwe. Hagomba kwitonderwa kuko ubu bwoko bukomera burundu, bityo bushobora kwangirika cyane cyane mu gusudira nabi. Nta bushyuhe bugomba gukoreshwa kandi akenshi ubushyuhe nyuma yo gusudira nabwo ntibukenewe. AS 1554.6 ibanza kwemeza inkoni na electrode bya 904L byo gusudira bya 904L.
Ubuhanga
904L ni ubuziranenge buri hejuru, ifite urwego ruto rwa sulfure, bityo ntabwo ishobora gukora imashini neza. Nubwo bimeze bityo, urwo rwego rushobora gukorwa hakoreshejwe uburyo busanzwe.
Gupfunyika ku gice gito biroroshye. Akenshi ibi bikorwa mu gihe hakonje. Gupfunyika nyuma ntabwo ari ngombwa, nubwo bikwiye kwitabwaho niba ibyo bikorwa bigomba gukoreshwa ahantu hateganijwe ko hazaba hari ikibazo gikomeye cyo kwangirika kw'ingufu.
Porogaramu
Porogaramu zisanzwe zirimo:
• Uruganda rutunganya aside sulfuri, fosfori na asetiki
• Gutunganya ibinure n'impapuro
• Ibice bigize inganda zisukura gazi
• Ibikoresho byo gukonjesha amazi yo mu nyanja
• Ibikoresho byo gutunganya amavuta
• Insinga ziri mu byuma bitanga amashanyarazi
