904L bụ obere carbon elu alloy austenitic igwe anaghị agba nchara.Mgbakwunye ọla kọpa na ọkwa a na-eme ka ọ dịkwuo mma iguzogide acid na-ebelata ike, karịsịa sulfuric acid.Ọ na-eguzogidekwa ọgụ nke chloride - ma pitting / crevice corrosion na nrụgide corrosion cracking.
Nke a ọkwa bụ na-abụghị magnetik n'ọnọdụ niile na nwere magburu onwe weldability na formability.Ọdịdị austenitic na-enyekwa ọkwa a ike siri ike, ọbụna ruo na okpomọkụ nke cryogenic.
904L nwere nnukwu ọdịnaya nke ngwa nickel na molybdenum dị oke ọnụ.Ọtụtụ n'ime ngwa ndị ọkwa ọkwa a rụburu nke ọma nwere ike imezu ugbu a na ọnụ ala dị ala site na igwe anaghị agba nchara duplex 2205 (S31803 ma ọ bụ S32205), yabụ a na-eji ya adịkarịghị karịa n'oge gara aga.
Njirimara igodo
A kọwapụtara akụrụngwa ndị a maka ngwaahịa akpọrepu ewepụghị (efere, mpempe akwụkwọ na eriri igwe) na ASTM B625.Ngwongwo ndị yiri ya mana ọ bụchaghị otu ka akọwapụtara maka ngwaahịa ndị ọzọ dị ka ọkpọkọ, tube na mmanya na nkọwapụta nke ha.
Ihe mejupụtara
Tebụl 1.Ihe mejupụtara ya maka ọkwa 904L nke igwe anaghị agba nchara.
Ọkwa | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
904L | min. max. | - 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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Ihe eji arụ ọrụ
Tebụl 2.Njirimara igwe nke igwe anaghị agba nchara 904L.
Ọkwa | Ike Tensile (MPa) min | Mpụta Ike 0.2% Ihe akaebe (MPa) min | Mgbatị (% na 50mm) min | Isi ike | |
Rockwell B (HR B) | Brinell (HB) | ||||
904L | 490 | 220 | 35 | 70-90 nkịtị | - |
Oke uru Rockwell Hardness bụ naanị;ụkpụrụ ndị ọzọ akọwapụtara oke. |
Njirimara anụ ahụ
Tebụl 3.Njirimara anụ ahụ ahụkarị maka igwe anaghị agba nchara 904L.
Ọkwa | Njupụta | Modul na-agbanwe | Ọnụ ego nke Mgbasa ọkụ (µm/m/°C) | Nrụpụta okpomọkụ | Okpomọkụ akọwapụtara 0-100 Celsius | Elec Resistivity | |||
0-100°C | 0-315°C | 0-538°C | Na 20 Celsius C | Na 500°C | |||||
904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Ntụle nkọwa ọkwa ọkwa
Tebụl 4.Nkọwa ọkwa ọkwa maka igwe anaghị agba nchara 904L.
Ọkwa | UNS Mba | Ochie British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Aha | ||||
904L | N08904 | 904S13 | - | 1,4539 | X1NiCrMoCuN25-20-5 | 2562 | - |
Ntụnyere ndị a bụ ihe dị ka naanị.Ezubere ndepụta a ka ntụnyere ihe ndị yiri ya na-arụ ọrụọ bụghịdị ka nhazi oge nke nkwekọrịta kwekọrọ.Ọ bụrụ na achọrọ kpọmkwem ihe dakọtara, a ga-enyocharịrị nkọwa mbụ. |
Klas nke ọzọ enwere ike
Tebụl 5.Enwere ike inweta akara ule ọzọ na igwe anaghị agba nchara 904L.
Ọkwa | Ihe kpatara enwere ike họrọ ya kama 904L |
316L | Nhọrọ ọzọ dị ọnụ ala, mana nwere nguzogide corrosion dị ala. |
6Mo | Nguzogide dị elu na nguzogide corrosion na crevice dị mkpa. |
2205 | A yiri nnọọ corrosion eguzogide, na 2205 nwere elu n'ibu ike, na na a ala na-eri na 904L.(2205 adabaghị maka okpomọkụ karịrị 300C.) |
Super duplex | A chọrọ nguzogide corrosion dị elu, yana ike dị elu karịa 904L. |
Nguzogide corrosion
Ọ bụ ezie na e mepụtara ya na mbụ maka iguzogide sulfuric acid, ọ nwekwara nnukwu nguzogide gburugburu ebe dị iche iche.A PRE nke 35 na-egosi na ihe ahụ nwere ezigbo nguzogide mmiri mmiri na-ekpo ọkụ na ebe ndị ọzọ dị elu chloride.Ọdịnaya nickel dị elu na-arụpụta ezigbo nguzogide nrụgide corrosion mgbawa karịa akara akara austenitic ọkọlọtọ.Ọla kọpa na-agbakwunye iguzogide sọlfọ na acid ndị ọzọ na-ebelata, ọkachasị na oke “etiti itinye uche” na-eme ihe ike.
N'ọtụtụ gburugburu 904L nwere arụmọrụ corrosion etiti n'etiti ọkwa austenitic ọkọlọtọ 316L yana 6% molybdenum alloyed nke ukwuu yana akara akara “super austenitic”.
Na nitric acid na-eme ihe ike 904L nwere obere nguzogide karịa akara molybdenum na-enweghị ihe dịka 304L na 310L.
Maka oke nrụgide corrosion mgbawa mgbawa na gburugburu ebe dị oke egwu, nchara kwesịrị ka a gwọọ ya mgbe ọrụ oyi gasịrị.
Okpomọkụ Nguzogide
Ezigbo iguzogide ọxịdashọn, mana dị ka akara ule ndị ọzọ dị elu na-ata ahụhụ site na nkwụsi ike n'usoro (oke mmiri ozuzo nke akụkụ kenkuwa dị ka sigma) na oke okpomọkụ.904L ekwesịghị iji ihe dị ka 400C.
Ọgwụgwọ okpomọkụ
Ngwọta Ngwọta (Annealing) - okpomọkụ ruo 1090-1175 Celsius ma dị jụụ ngwa ngwa.Agaghị eme ka ọkwa a sie ike site na ọgwụgwọ okpomọkụ.
ịgbado ọkụ
Enwere ike ịgbado 904L nke ọma site na usoro ọkọlọtọ niile.Ọ dị mkpa ka kpachara anya ka ọkwa a na-esiwanye ike n'ụzọ zuru ezu austenitic, ya mere ọ na-enwe ike ịgbawa ọkụ, karịsịa na welded mmachi.Ọ dịghị tupu okpomọkụ e kwesịrị iji na n'ọtụtụ ọnọdụ post weld okpomọkụ adịghịkwa achọ.AS 1554.6 tupu eru eru ọkwa ọkwa 904L mkpanaka na electrodes maka ịgbado ọkụ nke 904L.
Imepụta
904L bụ ịdị ọcha dị elu, ọkwa sọlfọ dị ala, yabụ na nke a agaghị arụ ọrụ nke ọma.N'agbanyeghị nke a, enwere ike ịmegharị ọkwa ahụ site na iji usoro ọkọlọtọ.
Ehulata na obere radius na-eme ngwa ngwa.Ọtụtụ mgbe, a na-eme nke a oyi.Ọ dịghị mkpa ka anneal na-esote ya n'ozuzu, ọ bụ ezie na ekwesịrị ịtụle ma ọ bụrụ na a ga-eji ihe a na-emepụta ihe na gburugburu ebe a na-atụ anya ọnọdụ nrụgide corrosion siri ike.
Ngwa
Ngwa a na-ahụkarị gụnyere:
• Nhazi osisi maka sulphuric, phosphoric na acetic acid
• Pulp na nhazi akwụkwọ
• Ihe ndị dị na gas na-ehichapụ osisi
• Akụrụngwa mmiri mmiri dị jụụ
• Ihe ndị na-emepụta mmanụ mmanụ
• Waya na electrostatic precipitators