904L fesalless kila | Corrosionion-resistant super Austetitic alloy

1. Hōʻikeʻike

904L fesalless kila (UNS N08904/EN1.4539) kū ma ka piko o ka ʻohana super-austenitic, mahalo nui ʻia no kona kū ʻana i ka corrosion, ka ikaika ikaika, a me ka formability.

Hoʻokumu pū ʻia e Outokumpu a me AK Steel i nā makahiki 1970 e hoʻokō i nā koʻikoʻi o ka ʻoihana hana kemika.,

904L hoʻopiha ʻia ke kila kila i kahi āpau koʻikoʻi ma waena o nā māka 300-series maʻamau (E.g., 304L, 316L) a me nā mea hoʻohui nickel hou aku.

I kēia mau lā, loaʻa iā ia nā mākeke koʻikoʻi i ka petrochemical, Marine, mana pā'āʻu, a me nā ʻāpana lāʻau maʻemaʻe kiʻekiʻe.

Nānā kēia ʻatikala i ka haku mele 904L, waiwai, huahuai, a me nā noi e alakaʻi i ke koho ʻana i nā mea i nā wahi koi.

2. Kinohi & Kumu Metallurgical

904L kila kohu ʻole he mea hoʻohuihui super-austenitic i hoʻolālā ʻia e hāʻawi i ke kūpaʻa corrosion kūʻokoʻa i nā kemika koʻikoʻi a me nā kai kai.

Loaʻa kāna hana mai kahi hoʻohui kemika i hoʻoikaika ʻia e hoʻoikaika i ke kū'ē i ka lua, Kāleʻa Crenice Corrosioni, a me ka uhaki ʻana i ke kaumaha-corrosion, ʻoi aku ka nui o ka chloride-bearing a me ka acidic.

Nominal Chemical Composition o 904L (Ko mākou ne08904) Kila kohu ʻole

ʻAno Metallurgical

• Fully Austenitic Microstructure: The high Ni and Cr content stabilizes a single-phase austenitic matrix, even after welding or cold working,
  eliminating the risk of ferrite or sigma phase formation that can degrade corrosion performance.
• Ke kala kala (L-grade): Me C ≤ 0.02%, 904L stainless steel is highly resistant to intergranular corrosion, even in the as-welded condition, and meets ASTM A262 Practice E requirements.
• Hoʻopaʻa kūʻē i ka Sensitization: ʻAʻole e like me kekahi mau kila kila, 904ʻAʻole makemake ʻo L i ka titanium (No) a i ʻole niobium (Nb) stabilizers
  no ka mea, ʻo kāna kalapona haʻahaʻa haʻahaʻa a me ka hoʻopiʻi ʻana wikiwiki e pale i ka ua chromium carbide.
• Alloy Synergy: ʻO ka synergy ma waena o Mo, Cu, a hoʻomaikaʻi ʻo Ni i ka pale ʻana i ka corrosion i ka hoʻohaʻahaʻa ʻana a me ka hui ʻana o ka waika, komo sulfuric acid a hiki i 40 % ka hoʻopaʻa ʻana i nā mahana ambient.

3. O ka kino & Nā Pono Mechanical o 904L Kuhili ʻole

4. Ke kū'ē neiʻo Corrosionion & Durability

ʻO keʻano o ke kila kila 904lʻo ia ka paleʻana o ka paleʻana ma luna o kahi kiko'ī o ka pili o kaʻoihana:

• Genenation Corrison: ʻO ka hoʻoukaʻanaʻole i ka hoʻouka kauaʻana ma nā wahi nohoʻole.
• ʻO ka paleʻana / crevice resistisnce: Me kahi helu kūlike e kūlike ana (Wood) ka hoʻokokokeʻana 40, 904L wuperform 316l (Wood ≈ 24) a match i kekahi mau super-austenitics e like me 254 ʻO MĀKOU.
• Chproide styled style-corrosioce (SCC): Ua hoʻohālikelikeʻia ka paleʻana i ka lā 316l; hoʻohanaʻia ma ka chrlode a hiki i 150 ° C, Aohea 156l ua kaupalenaʻia ka ~ 60 ° C.
• ʻO nā wahi ACIDIC: Loaʻa i ka copic i hoʻohuiʻia i ke kū'ēʻana i ka paleʻana i ka sulfuric a me nā phospopuric a me nā phospopric i lalo i 10 % kaʻikeʻana i ka mahana o ka lumi.
• ʻO ka hoʻohālikelike kiʻekiʻe: E lohi mālie ana nā hōʻailona 870 ° C, Hoʻopaʻa i ka lawelaweʻana i ka lawelaweʻana i nā noi i nā noi.

5. Huahuai & Kuʻihao o 904L kuhiliʻole kila

Hāʻawi ke kinikini super-austenitic o ke kila kila 904L i ke kūpaʻa ʻole a me ka paʻakikī., akā, koi nō hoʻi ia i ka mālama pono ʻana i ka wā o ka hoʻokumu ʻana a me ka hui ʻana e mālama i kāna hana.

Hana & Machimen

• Ke hana anuanu:

• • 904L hiki ke huki hohonu, kū, a i ʻole i ʻōwili ʻia ma ke kūlana annealed (20 ° C) me nā elongations ≥ 40 %.
  • No ka mea, e hana wikiwiki ana, ʻO ka hoʻokumu pinepine ʻana i nā pae he nui anneals waena a 1,040 °C e hoʻihoʻi i ka ductility.

• Markinpalibility:

• • Ua helu ʻia ma ~ 25 % o ke kūlana AISI B1112, 904Pono ʻo L nā wikiwiki haʻahaʻa haʻahaʻa (30-60 m / me) and mea paahana-carbide (Kū, Ō'ō, aiʻole AlTiN).
  • Mea hoʻoluʻu kiʻekiʻe (≥ 50 Bar) a me ka helu hānai o 0.1–0.3 mm/rev kōkua i ka mālama ʻana i ka wela a pale i ke kūkulu ʻia ʻana o ka lihi..

Nā hana ulding

Nā Kaʻina Hana i Manaʻo ʻia

• ʻO nā mea hanaʻino (Gtaw / huli): Hāʻawi i ka mana wela pololei, kūpono no nā ʻāpana pā lahilahi a me nā hui koʻikoʻi.
• Metal Kālepa Pūnaewele (GMAW/MIG): Ua kūpono no ka nui o ka waiho ʻana ma nā ʻāpana mānoanoa.
• Poʻo Poʻo (Ikea): Hoʻohana ʻia no nā welded nui kahi i ʻoi aku ka maikaʻi ma mua o ka pololei.

Palapala Pole & Nā pameters

• Nā mea hoʻopiha piha: ERNiCrMo‑3 (Alloy 625) a i ʻole ER385 (904L e kūlike) e hōʻoia i ka hana hoʻoheheʻe ʻana o ka weld metala.
• ʻO ka hoʻokomo wela: E mālama i waena 0.3–0.5 kJ/mm e hōʻemi i ka pōʻalo wela.
• ʻO keʻano o ka mahana: Mālama i lalo 150 ° C. ʻAʻole pono ka hoʻomaʻamaʻa mua.
• ʻO ke ahi ahi: 100% hui pū ʻia ka argon a i ʻole argon-helium ma 12–20 L/min kahe no ka paʻa ʻana o ke arc..

Hoʻemi i nā hemahema Weld

• Intergranur corrosior: E hōʻalo i nā manawa noho lōʻihi ma 600–900 °C hoʻonaʻauao. Inā wili i nā hale nui, hoʻokō hoʻonā i ka hoʻonāʻana ma 1,040 ° C a me ke kinai wikiwiki e hoʻoheheʻe hou i nā chromium carbide.
• Kūlike: E hoʻohana i nā hoʻolālā hui me nā radii aʻa nui a me nā helu hoʻomaha hoʻomalu. E hoʻomaʻamaʻa mua i nā ʻāpana lahilahi i ka 100-150 °C inā pono e hōʻemi i nā gradients wela.

Hoʻomaʻamaʻa Post-Weld

• Hoʻoholo hōʻoluʻolu: 1,040 - 1,100 °C no 15-30 min, ukali ka wai wai, hoʻihoʻi i ka ʻōnaehana austenitic piha a hoʻonui i ka pale ʻana i ka corrosion.
• Pickling & Hoʻolauna: Hoʻopau ka ʻauʻau ma muli o ka nitric, ʻoiai ʻo ka passivation acid citric e kūkulu hou i ka papa pale Cr₂O₃.

6. Nā noi o ka kila kila 904l

ʻO ke kila kila 904L ke kūpaʻa kūʻokoʻa o ka corrosion a me ka ikaika mechanical e kūpono ia no nā kaiapuni koi.. Aia ma lalo kona mau ʻāpana noi mua a me nā ʻāpana ʻelele:

Ke kālepaʻana

• Nā mea kanu ʻakika Sulfuric: ʻO nā paipu hoʻololi wela, nā pūpū reactor, hoʻoili paipu, Nā kāpili pump
• Nā Mea Hana ʻAka Phosphoric: Nā pahu mālama, moku huikau, Nā Wākē Kūʻai, pipet complees
• Hoʻohui Kemika Nui: Nā kolamu distillation, nā moku pane, Nā pahu mālama

Marine & Of 3Ikeha

• Nā ʻoihana o lalo o ka moana: Pipeline risers, nā mea hoʻokuʻi luawai, subeseanilds
• Shopbuilding: Nā Kūlana Kūʻai, nā kānana wai kai, lako lako deck, intake grilles
• Hoʻohanaʻoihana: ʻO nā hale membrane RO, kiʻekiʻe-press feed pumps, condenser coils

Ka Makani & ʻO ka ho'ōlaʻana i ka meaʻai

• Laau Laau Laau: Mea hoʻoheheʻe hui, paipu maʻemaʻe ma kahi, sterile manifolds
• Waiwai & Hana hānai: Nā pahu fermentation, nā silos mālama, nā mea hoʻololi wela pasteurization

Mana pā'āʻu & Kaʻiʻikeʻaʻa

• ʻO ka hoʻoheheʻe ʻana o ke kinoea (Fgd): Absorber hale kiaʻi i loko, nā mea hoʻopau noe, pumps recirculation
• ʻAi ʻAi ʻAi ʻAi Paʻi: Nā ʻawaʻawa ʻawaʻawa kūʻokoʻa, hoʻopaʻa laina

Lako Kiekie Maemae

• Nā mea hana semiconducor: ʻO ka hoʻouna ʻana i nā kemika, nā keʻena etch
• Mea Hana Analytical: Urowing, nā mea hoʻohana laʻana

7. Nā Kūlana a me nā kiko'ī

904ʻIke ʻia ke kila kila kila ma ka honua holoʻokoʻa ma lalo o nā kūlana aupuni a me ka honua.

ʻO kēia mau kikoʻī e hōʻoia i ka hoʻokō ʻana o ka mea i nā kemika kūlike, puiahuhu, a me nā koi dimensional no ka hoʻohana ʻana i nā kaiapuni koi.

Pākaukau: Nā Kūlana Koʻikoʻi a me nā kikoʻī no ka 904L Stainless Steel

8. Hoʻohālikelike hoʻohālikelike

904L hoʻokaʻawale ʻia ke kila kila ma ke ʻano he kila kila ʻole austenitic, a ua hoʻohālikelike pinepine ʻia kāna hana me nā mea hoʻohana maʻamau i ka corrosion-resistant alloys.

904L vs. 316L a me 317L

Hōʻaʻakeʻa

904L hāʻawi ʻia ke kila kila Ke kū'ē neiʻo Corrosion Corrosiotion i ka 316L a me 317L, i loko ka ʻakika a me ka chloride kaiapuni. ʻOi aku ka maikaʻi e kūʻē sulfuric acid, kahi e hāʻule ai ka 316L/317L.
Akā naʻe,, 904ʻOi aku ke kumukūʻai o L a pono i nā hana wiliwili makaʻala, ʻoi aku ka maikaʻi no nā noi kiʻekiʻe.

904L vs. ʻO nā kila ʻiliahi Super Duplex (2205, 2507)

Hōʻaʻakeʻa

ʻO nā kila kila kila super duplex (loa 2507) ai ʻoi nui ka ikaika a ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion i hoʻohālikelike ʻia me ke kila kila 904L, i loko Nā kikowaena chrlode.

Akā naʻe,, ʻoi aku ka paʻakikī o ka weld a hiki ke pilikia ʻO nā pilikia Ferrite-Phase I nā noi noi kiʻekiʻe.

904L fesalless kila, Makahiki piha piha, ai ʻoi aku ka maikaʻi a me ka formability, Akā me ka ikaika haʻahaʻa haʻahaʻa.

904L vs. Nā Papa Super Austenitic ʻē aʻe (E.g., 254ʻO MĀKOU, AL-6XN)

Hōʻaʻakeʻa

Nāʻekoluʻekolu ʻO nā helu Austetitic Super Austetitic, aka, 254ʻO MĀKOU and AL-6XN Hāʻawi ʻoi aku kaʻoi aku ke kiʻekiʻe o ka hoʻopiliʻana ma mua o 904l ma muli o kā lākou ʻoi aku ka nui a me nā manaʻo.

ʻO kēia mau mea makemake i makemakeʻia ʻO nā mea hana marice a iʻole nā ​​kaʻina hana maʻamau, aka o lakou ʻoi aku ka kiʻekiʻe o nā kumukūʻai ma mua o 904l ka mea kila.

No nā noi he nui, 904L hāʻawi i kahi kaulike kūpono o ka hana a me ka hiki.

9. Hopena

904L stainless sweel e noho ana i kahi nique unique ma waena o nā 300-series a me nā mea hou.

Hāʻawi ia i nā kemika i hoʻohālikelike ʻia i ka pale ʻana i ka corrosion hiki ʻole ke hoʻohālikelike ʻia - ʻoi loa i nā chlorides a me nā waikawa ikaika - i hui pū ʻia me nā waiwai mechanical ikaika a me ka hana maikaʻi..

Ke neʻe nei nā ʻoihana i nā kaiapuni ʻoi aku ka ikaika a me nā wā lawelawe lōʻihi, 904E ulu mau ana ko L kuleana, i hoʻoikaika ʻia e ka hoʻomaʻemaʻe ʻana i ka alloy a me nā hana hoʻomohala kūpaʻa.

LangHe ʻO ke koho kūpono kūpono no kāu hana hana e pono ai inā makemakeʻoe i ka maikaʻi kiʻekiʻe nā mea hao kila.

Kāhea iā mākou i kēia lā!

 

FaqS

He aha ka mea kūikawā e pili ana i ke kila 904L?

904L he a kila kila ʻole austenitic kaulana no kona:

• Ke kū'ē neiʻo Corrosion Corrosion, ʻoi aku ka nui o ka ʻakika a me ka chloride kaiapuni (E.g., sulfuric acid, Ke wai wai).
• Maʻiʻo hao kiʻekiʻe, me ~25% Nickel (I), ~4.5% Molybdenum (Mo), a me ke keleawe (Cu), e hoʻonui ai i ke kū'ē i ka lua, Kāleʻa Crenice Corrosioni, a me ke kaumaha o ke kaumaha.
• Maikaʻi formability a weldability, mahalo i kāna microstructure austenitic piha.
• Paʻa i loko o nā kaiaola kemika ikaika, hana ia mea kūpono no ka hana kemika, Marine, a me nā hana hoʻolālā lāʻau lapaʻau.

ʻOi aku ka 904L ma mua o 316?

ʻAe, e pili ana i ka pale ʻana i ka corrosion, nui loa ʻakika a chloride-kaumaha, 904ʻOi aku ka maikaʻi ma mua o L 316.

Ke hoʻohana nei ʻo Rolex i ke kila kila 904L?

ʻAe. Rolex ʻike ʻia no ka hoʻohana ʻana i kahi mana ponoʻī o 904L fesalless kila, a lakou i kapa aku ai ʻOystersteel.

ʻO 904L ke kila kila kila ke kumu kūʻai?

ʻAe. 904ʻOi aku ka nui o ke kumukūʻai L ma mua o nā kila kuhili ʻole like 304 Oole 316.

904Hiki iā L ke kūʻai i 2-3 manawa ʻoi aku ma mua o 316L no ka kilo, ma muli o nā kūlana kūʻai a me ke ʻano (Bar, she wallpaper, pi pou, etc.).