904L waa bir aan lahayn kaarboon yar oo austenitic ah oo aan xasilloonayn. Ku darista naxaasta heerkan waxay si weyn u hagaajinaysaa iska caabinta asiidhyada yareeya xoogga, gaar ahaan asiidhka sulfuric. Sidoo kale aad bay u adkaysataa weerarka koloriinta - labadaba daxalka daloolada/godadka iyo dillaaca daxalka cadaadiska.
Heerkani ma aha mid birlab ah dhammaan xaaladaha wuxuuna leeyahay alxan iyo qaab-dhismeed aad u fiican. Qaab-dhismeedka austenitic wuxuu sidoo kale siinayaa darajadan adkeysi aad u fiican, xitaa heerkulka cryogenic.
904L waxay leedahay waxyaabo aad u badan oo ka kooban maaddooyinka qiimaha sare leh ee nikkel iyo molybdenum. Adeegsiyo badan oo heerkani hore si fiican u qabtay ayaa hadda lagu fulin karaa qiimo jaban iyadoo la adeegsanayo bir aan bir lahayn oo duplex ah 2205 (S31803 ama S32205), sidaa darteed si ka yar ayaa loo isticmaalaa sidii hore.
Sifooyinka Muhiimka ah
Sifooyinkan waxaa lagu qeexay badeecada fidsan ee la duubay (saxan, xaashi iyo gariirad) ee ASTM B625. Sifooyinka la midka ah laakiin aan daruuri ahayn isku mid ayaa loo qeexay alaabada kale sida tuubooyinka, tuubada iyo baarka sida ku cad qeexitaankooda.
Halabuurka
Shaxda 1aad.Halabuurka wuxuu ka kooban yahay bir aan miridh lahayn oo ah nooca 904L.
| Fasal | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | ugu yaraan. ugu badnaan. | - 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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Sifooyinka Farsamada
Shaxda 2aad.Sifooyinka farsamada ee birta aan la taaban karin ee heerka 904L.
| Fasal | Xoogga Garaacista (MPa) ugu yaraan | Xoog Wax-soo-saar 0.2% Caddayn (MPa) ugu yaraan | Kordhinta (% 50mm) ugu yaraan | Adkaanta | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 caadi ah | - |
| Kala duwanaanshaha qiimaha adag ee Rockwell waa mid caadi ah oo keliya; qiimayaasha kale waa xaddidaadyo la cayimay. | |||||
Sifooyinka Jirka
Shaxda 3aad.Sifooyinka jireed ee caadiga ah ee birta aan la taaban karin ee heerka 904L.
| Fasal | Cufnaanta | Modulus Laablaaban | Celceliska Isku-dhafka Ballaarinta Kulaylka (µm/m/°C) | Qaboojinta Kulaylka | Kulayl Gaar ah 0-100°C | Iska caabinta Elektroonigga ah | |||
| 0-100°C | 0-315°C | 0-538°C | Heerkulka 20°C | Heerkul 500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Isbarbardhigga Tilmaamaha Darajada
Shaxda 4aad.Tilmaamaha Darajada ee Biraha aan la taaban karin ee heerka 904L.
| Fasal | Lambarka UNS | Ingiriiskii Hore | Euronorm | SS-ka Iswiidhishka | JIS-ka Jabbaan | ||
| BS | En | No | Magaca | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| Isbarbardhigyadani waa qiyaas ahaan oo keliya. Liiska waxaa loogu talagalay isbarbardhigga agabyada shaqada isku midka ah.mayasida jadwalka heshiisyada u dhigma. Haddii loo baahdo tilmaamo sax ah oo ku saabsan asalka waa in lagala tashadaa. | |||||||
Darajooyinka Kale ee Suurtagalka ah
Shaxda 5aad.Noocyada kale ee suurtogalka ah ee birta aan lahayn 904L.
| Fasal | Sababta loo dooran karo halkii laga dooran lahaa 904L |
| 316L | Beddel kharash yar, laakiin leh iska caabin aad u hooseeya oo daxalka ah. |
| 6 Bilood | Waxaa loo baahan yahay iska caabin sare oo ka dhan ah godadka iyo iska caabinta daxalka godadka. |
| 2205 | Iska caabin aad u la mid ah daxalka, iyadoo 2205 uu leeyahay awood farsamo oo sareysa, qiimo jabanna uu yahay 904L. (2205 kuma habboona heerkulka ka sarreeya 300°C.) |
| Laba dabaq oo aad u sarreeya | Waxaa loo baahan yahay iska caabin daxalka oo sareysa, oo ay weheliso xoog ka sarreeya 904L. |
Iska caabinta Daxalka
Inkasta oo asal ahaan loo sameeyay iska caabbinta aashitada sulfuric, haddana waxay leedahay iska caabbin aad u sarreeya oo deegaanno kala duwan ah. A PRE oo ah 35 ayaa tilmaamaya in walaxdu ay leedahay iska caabbin wanaagsan oo biyaha badda diiran iyo deegaannada kale ee koloriin sare leh. Waxyaabaha ku jira nikkel-ka sare waxay keenaan iska caabbin aad uga wanaagsan dillaaca daxalka cadaadiska marka loo eego heerarka caadiga ah ee austenitic. Naxaasku wuxuu ku daraa iska caabbinta aashitada sulfuric iyo kuwa kale ee yareeya, gaar ahaan heerka "dhexdhexaadka" ee aadka u daran.
Deegaannada badankood, 904L wuxuu leeyahay waxqabad daxaleed oo u dhexeeya heerka caadiga ah ee austenitic 316L iyo 6% molybdenum oo aad u dahaarsan iyo heerarka la midka ah ee "super austenitic".
Aashitada nitric ee daran, 904L waxay leedahay iska caabin ka yar heerarka aan molybdenum-ka lahayn sida 304L iyo 310L.
Si loo helo iska caabinta ugu badan ee dildilaaca daxalka ee deegaannada muhiimka ah, birta waa in lagu daaweeyaa xal ka dib shaqada qabow.
Iska caabbinta kulaylka
Iska caabin wanaagsan oo ku wajahan oksaydhaynta, laakiin sida darajooyinka kale ee aadka u dahaarka leh waxay la il daran yihiin xasillooni darro qaab-dhismeed (roobaadka marxaladaha jajaban sida sigma) heerkulka sare. 904L waa in aan loo isticmaalin heerkul ka sarreeya 400°C.
Daaweynta Kulaylka
Daaweynta Xalka (Dhigista) - kuleyli ilaa 1090-1175°C oo si degdeg ah u qabooji. Heerkan laguma adkayn karo daaweynta kulaylka.
Alxanka
904L si guul leh ayaa loogu toli karaa dhammaan hababka caadiga ah. Taxaddar ayaa loo baahan yahay maadaama heerkani uu si buuxda u adkeeyo austenitic, sidaas darteed wuxuu u nugul yahay dildilaaca kulul, gaar ahaan alxanka xaddidan. Looma baahna in la isticmaalo kuleyl hore, inta badanna daaweynta kulaylka alxanka ka dib looma baahna. AS 1554.6 waxay horay u sii aqoonsatay ulaha iyo elektroodhada heerka 904L ee alxanka 904L.
Sameynta
904L waa nadiifnimo sare, heer sulfur hooseeya, sidaas darteedna si fiican uma shaqeyn doono. Iyadoo taasi jirto, darajada waxaa lagu farsameyn karaa farsamooyinka caadiga ah.
Si fudud ayaa loo sameeyaa foorarsiga gacan yar. Inta badan tan waxaa lagu sameeyaa qabow. Daadinta xigta guud ahaan looma baahna, inkastoo ay tahay in la tixgeliyo haddii farsamaynta loo isticmaalayo jawi ay ka jiraan xaalado daran oo dildilaaca miridhku.
Codsiyada
Codsiyada caadiga ah waxaa ka mid ah:
• Warshad farsameysa asiidhyada sulfuric, fosfooras iyo acetic
• Habaynta saxarka iyo warqadda
• Qaybaha ku jira warshadaha xoqidda gaaska
• Qalabka qaboojinta biyaha badda
• Qaybaha warshadda sifeynta saliidda
• Fiilooyinka ku jira dareewallada korontada ku shaqeeya
