Kedu ihe dị iche n'etiti 17-4PH na ọla ndị ọzọ na-eme ka mmiri sie ike (PH)?

Kedu ihe dị iche n'etiti 17-4PH na ọla ndị ọzọ na-eme ka mmiri sie ike (PH)?

Okwu mmalite

Igwe anaghị agba nchara nke mmiri ozuzo (PH steels) bụ klas nke alloys na-eguzogide corrosion na-ejikọta ike nke martensitic na austenitic steels na ezigbo nguzogide corrosion. N'etiti ha,17-4PH igwe anaghị agba ncharabụ ihe ịrụ ụka adịghị ya na nke a na-ejikarị eme ihe n'ihi ihe eji arụ ọrụ ya pụrụ iche na ịdị mfe nke imepụta ya. Mana kedu ka ọ si atụnyere akara ule PH ndị ọzọ dị ka 15-5PH, 13-8Mo, 17-7PH, na omenala 465? Edemede a na-emikpu n'ime ihe dị iche iche nke mejupụtara, ọgwụgwọ okpomọkụ, ihe eji arụ ọrụ, nguzogide corrosion, na ngwa.

Nkọwa nke Ọdịda-ike igwe anaghị agba nchara

Igwe mmiri ozuzo na-eme ka ọ dị ike na-enweta ike ha site na nhazi nke ọma na-agbapụta na matriks ígwè n'oge ọgwụgwọ okpomọkụ nke ịka nká. E kewara ígwè ndị a ụzọ atọ bụ isi:

1. Ụdị PH nke Martensitic(dịka ọmụmaatụ,17-4PH, 15-5PH)
2. Semi-austenitic PH steels(dịka ọmụmaatụ, 17-7PH)
3. Austenitic PH steels(dịka ọmụmaatụ, A286)

Ụdị nke ọ bụla na-enye ngwakọta pụrụ iche nke ahaziri maka mkpa ụlọ ọrụ dị iche iche.

17-4PH (UNS S17400): Ụkpụrụ ụlọ ọrụ

Ihe mejupụtara:

• Kr: 15.0–17.5%
• Ni: 3.0-5.0%
• Cu: 3.0-5.0%
• Nb (Cb): 0.15–0.45%

Ọgwụgwọ okpomọkụ: Ngwọta-agwọta na agadi (nke H900 ruo H1150-M)

Ngwongwo igwe (H900):

• Ike nkwụsị: 1310 MPa
• Ike mpụta: 1170 MPa
• Mgbatị: 10%
• Isi ike: ~ 44 HRC

Uru:

• Ike dị elu
• Nguzogide corrosion na-agafeghị oke
• Ezi igwe
• Enwere ike weldable

Ngwa:

• Akụkụ ikuku
• Ihe nrụpụta nuklia
• Valves, shafts, fasteners

Tụnyere ya na igwe anaghị agba nchara PH ndị ọzọ

15-5PH (UNS S15500)

Ihe mejupụtara:

• Yiri 17-4PH, mana yana njikwa siri ike na adịghị ọcha
• Kr: 14.0–15.5%
• Ọnụ: 3.5-5.5%
• Ihe: 2.5-4.5%

Isi ihe dị iche:

• Mgbanwe ntụgharị ka mma n'ihi microstructure dị mma
• Mma n'ibu Njirimara na thicker ngalaba

Jiri Okwu:

• Forgings ikuku
• Ngwá ọrụ nhazi kemịkalụ

13-8Mo (UNS S13800)

Ihe mejupụtara:

• Kr: 12.25–13.25%
• Ọnụ: 7.5-8.5%
• Mo: 2.0–2.5%

Isi ihe dị iche:

• Nke kachasi ike na nguzogide corrosion
• Ike dị elu na oke obe-ngalaba
• Njikwa nhazi ihe siri ike maka ojiji ikuku

Jiri Okwu:

• Ihe mejupụtara ikuku ikuku
• Isi iyi dị elu

17-7PH (UNS S17700)

Ihe mejupụtara:

• Kr: 16.0–18.0%
• Ọnụ ego: 6.5-7.75%
• Al: 0.75-1.50%

Isi ihe dị iche:

• Semi-austenitic; chọrọ ọrụ oyi na ọgwụgwọ okpomọkụ
• Ọdịdị ka mma mana nguzogide corrosion dị ala karịa 17-4PH

Jiri Okwu:

• Aerospace diaphragms
• Bellows
• Mmiri

Omenala 465 (UNS S46500)

Ihe mejupụtara:

• Kr: 11.0–13.0%
• Ni: 10.75-11.25%
• Nke: 1.5-2.0%
• Mo: 0.75–1.25%

Isi ihe dị iche:

• Ike dị elu (ihe ruru 200 ksi tensile)
• Ike mgbaji dị mma
• Ọnụ ego dị elu

Jiri Okwu:

• Ngwa ịwa ahụ
• Ihe nkwụnye ụgbọ elu
• Akụkụ ọdịda gia

Ntụle ọgwụgwọ okpomọkụ

Ntụnyere Nguzogide Nrụrụ Aka

• Kachasị mma:13-8Mo na omenala 465
• Ọ dị mma:17-4PH na 15-5PH
• Kwesịrị ekwesị:17-7PH

Mara: Ọ dịghị onye dabara na nguzogide corrosion nke akara ule austenitic zuru oke dịka 316L.

Machinability na Weldability

Ntụle ọnụ ahịa

• Kacha dị ọnụ ahịa:17-4PH
• Ọkwa adịchaghị:13-8Mo na omenala 465
• Nhazi:15-5PH

Ntụle ngwa

Nchịkọta

Mmechi

Ọ bụ ezie na 17-4PH ka na-aga-na PH igwe anaghị agba nchara maka ọtụtụ ngwa ebumnuche, ọkwa PH ọ bụla nwere uru dị iche iche na-eme ka ọ dabara nke ọma maka ihe achọrọ. Ịghọta nuances dị n'etiti alloys ndị a na-enyere ndị injinia ihe onwunwe na ndị na-azụ ahịa aka ime mkpebi ziri ezi dabere na ike, ike, nguzogide corrosion, na ọnụ ahịa.