I-904L iyinsimbi engagqwali engaqinile enekhabhoni ephezulu ye-austenitic.Ukwengezwa kwethusi kuleli banga kukwenza kube ngcono kakhulu ukumelana nama-acids anciphisa amandla, ikakhulukazi i-sulfuric acid.Iphinde imelane kakhulu nokuhlaselwa kwe-chloride - kokubili ukugqwala komgodi / imifantu kanye nokuqhekeka kokugqwala kwengcindezi.
Leli banga alinawo uzibuthe kuzo zonke izimo futhi linokushisela okuhle nokubukeka kahle.Isakhiwo se-austenitic sinikeza leli banga ukuqina okuhle kakhulu, ngisho naphansi kwamazinga okushisa e-cryogenic.
I-904L inokuqukethwe okuningi kwezithako ezibiza kakhulu i-nickel ne-molybdenum.Iningi lezinhlelo zokusebenza lapho leli banga lenze kahle khona manje zingagcwaliseka ngezindleko eziphansi nge-duplex stainless steel 2205 (S31803 noma i-S32205), ngakho-ke isetshenziswa kancane kakhulu kunangaphambili.
Izakhiwo Eziyinhloko
Lezi zakhiwo zicaciswe kumkhiqizo ogoqelwe oyisicaba (ipuleti, ishidi kanye nekhoyili) ku-ASTM B625.Izakhiwo ezifanayo kodwa azifani ngempela zicaciswe kweminye imikhiqizo efana nepayipi, ishubhu kanye nebha ngokucaciswa kwazo.
Ukwakheka
Ithebula 1.Ibanga lokuhlanganisa lebanga elingu-904L lezinsimbi ezingenasici.
| Ibanga | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
| 904L | imiz. ubuningi. | - 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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Izakhiwo Zemishini
Ithebula 2.Izakhiwo zemishini ye-904L grade stainless steels.
| Ibanga | Amandla E-Tensile (MPa) min | Amandla Esivuno 0.2% Ubufakazi (MPa) min | Ubude (% ku-50mm) min | Ukuqina | |
| I-Rockwell B (HR B) | I-Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 ejwayelekile | - |
| Ibanga lenani le-Rockwell Hardness lijwayelekile kuphela;amanye amanani ayimikhawulo ecacisiwe. | |||||
Izakhiwo Zomzimba
Ithebula 3.Izakhiwo ezibonakalayo ezijwayelekile zezinsimbi ezingenasici zebanga le-904L.
| Ibanga | Ukuminyana | I-Elastic Modulus | I-Co-eff esho ukunwetshwa kwe-Thermal (µm/m/°C) | I-Thermal Conductivity | Ukushisa Okuthize 0-100°C | I-Elec Resistivity | |||
| 0-100°C | 0-315°C | 0-538°C | Ku-20°C | Ku-500°C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Ukuqhathaniswa Kwencazelo Yebanga
Ithebula 4.Izincazelo zebanga lezinsimbi ezingenasici zebanga le-904L.
| Ibanga | Inombolo ye-UNS | Old British | I-Euronorm | I-Swedish SS | I-JIS yaseJapane | ||
| BS | En | No | Igama | ||||
| 904L | N08904 | 904S13 | - | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
| Lezi ziqhathaniso ziyalinganiselwa kuphela.Uhlu luhloselwe ukuqhathanisa izinto ezisebenzayo ezifanayohhayinjengeshejuli yokulingana kwenkontileka.Uma kudingeka okufana ncamashí nemicikilisho yoqobo kufanele kuboniswane nayo. | |||||||
Amanye Amabanga Angenzeka
Ithebula 5.Amanye amamaki angaba ngu-904L ensimbi engagqwali.
| Ibanga | Kungani ingase ikhethwe esikhundleni se-904L |
| 316L | Enye izindleko eziphansi, kodwa ezinokumelana nokugqwala okuphansi kakhulu. |
| 6 Mo | Ukumelana nokugqwala okuphezulu kanye nokugqwala kwemigodi kuyadingeka. |
| 2205 | Ukumelana nokugqwala okufanayo kakhulu, ne-2205 inamandla aphakeme wemishini, futhi ngezindleko eziphansi ukuya ku-904L.(2205 awafanele amazinga okushisa angaphezu kuka-300°C.) |
| I-Super duplex | Kudingeka ukumelana nokugqwala okuphezulu, kanye namandla angaphezu kuka-904L. |
Ukumelana Nokugqwala
Nakuba ekuqaleni ithuthukiswe ukumelana kwayo ne-sulfuric acid kodwa futhi inokumelana okuphezulu kakhulu nezinhlobonhlobo zezindawo.I-PRE ye-35 ikhombisa ukuthi impahla inokumelana okuhle namanzi olwandle afudumele nezinye izindawo eziphakeme ze-chloride.Okuqukethwe kwe-nickel ephezulu kuphumela ekuphikiseni okungcono kakhulu kokuqhekeka kokugqwala kunamamaki ajwayelekile e-austenitic.I-Copper ingeza ukumelana ne-sulfuric namanye ama-acids anciphisa, ikakhulukazi ebangeni "eliphakathi lokuhlushwa" elinolaka.
Ezindaweni eziningi i-904L inokusebenza kokugqwala okuphakathi phakathi kwebanga elijwayelekile le-austenitic grade 316L kanye ne-molybdenum exube kakhulu engu-6% kanye namabanga afanayo “aphezulu austenitic”.
Ku-nitric acid enolaka i-904L inokumelana okuncane kunamamaki angenayo i-molybdenum afana no-304L no-310L.
Ukuze uthole ukumelana nokucindezeleka okukhulu kokugqwala kokuqhekeka ezindaweni ezibucayi insimbi kufanele iphathwe ngesixazululo ngemva komsebenzi obandayo.
Ukumelana Nokushisa
Ukumelana kahle ne-oxidation, kodwa njengamanye amamaki ane-alloyed kakhulu ihlushwa ukungazinzi kwesakhiwo (imvula yezigaba eziphukayo njenge-sigma) emazingeni okushisa aphakeme.I-904L akufanele isetshenziswe ngaphezu kuka-400°C.
Ukwelashwa Kokushisa
Ukwelashwa Kwesixazululo (Annealing) - ukushisa ku-1090-1175 ° C futhi kuphole ngokushesha.Leli banga alikwazi ukwenziwa lukhuni ukwelashwa okushisayo.
Ukushisela
I-904L ingashiselwa ngempumelelo ngazo zonke izindlela ezijwayelekile.Kudingeka ukunakekelwa njengoba leli banga liqina i-austenitic ngokugcwele, ngakho-ke kulula ukuqhekeka okushisayo, ikakhulukazi kuma-welds aqinile.Akukho ukushisa kwangaphambili okufanele kusetshenziswe futhi ezimeni eziningi ukwelashwa kokushisa kwe-weld nakho akudingeki.I-AS 1554.6 ifanelekela kuqala i-Grade 904L izinduku nama-electrode wokushisela okungu-904L.
Ukwenziwa
I-904L iwukuhlanzeka okuphezulu, ibanga lesibabule eliphansi, futhi ngenxa yalokho ngeke kusebenze kahle.Ngaphandle kwalokhu leli banga lingenziwa ngomshini kusetshenziswa amasu ajwayelekile.
Ukugobela engaba elincane kwenziwa kalula.Ezimweni eziningi lokhu kwenziwa kubanda.Ukukhipha isisu okulandelayo ngokuvamile akudingekile, nakuba kufanele kucatshangelwe uma ukwakhiwa kuzosetshenziswa endaweni lapho izimo zokuqhekeka kwe-corrosion yengcindezi enzima zilindelwe.
Izinhlelo zokusebenza
Izinhlelo zokusebenza ezijwayelekile zifaka:
• Isitshalo sokucubungula i-sulphuric, phosphoric kanye ne-acetic acid
• Ukucutshungulwa kwe-Pulp nephepha
• Izingxenye zezitshalo zokukhuhla igesi
• Izinto zokupholisa amanzi olwandle
• Izingxenye zokuhluza uwoyela
• Izintambo kuma-electrostatic precipitators