He aha ka ʻokoʻa ma waena o 17-4PH a me nā hao hao-hoʻopaʻa paʻakikī (PH)?

He aha ka ʻokoʻa ma waena o 17-4PH a me nā hao hao-hoʻopaʻa paʻakikī (PH)?

Hoʻolauna

ʻO nā kila kila e hoʻopaʻa nei i ka ua (PH steels) he papa o nā mea hoʻoheheʻe kūʻokoʻa e hoʻohui i ka ikaika o nā kila martensitic a me austenitic me ke kūpaʻa maikaʻi loa. Iwaena o lakou,17-4PH kila kilaʻO ia ka mea i hoʻohana nui ʻia ma muli o kāna mau ʻano mechanical kūikawā a me ka maʻalahi o ka hana ʻana. Akā, pehea e hoʻohālikelike ai i nā māka PH ʻē aʻe e like me 15-5PH, 13-8Mo, 17-7PH, a me Custom 465? Luʻu loa kēia ʻatikala i nā ʻokoʻa o ka haku mele ʻana, ka mālama ʻana i ka wela, nā waiwai mechanical, ka pale ʻana i ka corrosion, a me nā noi.

Ka Manaʻo o ka ua-hoʻopaʻa paʻakikī

Loaʻa ka ikaika i nā kila paʻakikī i ka hoʻokumu ʻana i nā ea maikaʻi i loko o ka matrix kila i ka wā o ka hoʻomaʻamaʻa wela. Ua māhele ʻia kēia mau kila i ʻekolu mau ʻano nui:

1. Nā kila Martensitic PH(e laʻa,17-4PH, 15-5PH)
2. Nā kila Semi-austenitic PH(e laʻa, 17-7PH)
3. Austenitic PH kila(e laʻa, A286)

Hāʻawi kēlā me kēia ʻāpana i kahi hui kūʻokoʻa o nā waiwai i kūpono i nā pono ʻoihana kūikawā.

17-4PH (UNS S17400): ʻO ke kūlana ʻoihana

Huina:

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

Hoʻomaʻamaʻa Wela: Hoʻoponopono ʻia a ʻelemakule (maʻamau H900 a i H1150-M)

Mea Mechanical (H900):

• ʻO ka ikaika tensile: 1310 MPa
• Ka ikaika o ka hua: 1170 MPa
• Elongation: 10%
• Paʻakiki: ~44 HRC

Nā pono:

• Ka ikaika kiʻekiʻe
• ʻO ke kūpaʻa ʻino
• Machinability maikaʻi
• Weldable

Nā noi:

• Nā ʻāpana aerospace
• Nukelea reactors
• ʻO nā kiwi, nā kumu, nā mea hoʻopaʻa

Hoʻohālikelike me nā mea kila ʻole PH ʻē aʻe

15-5PH (UNS S15500)

Huina:

• E like me 17-4PH, akā me nā mana paʻa i nā haumia
• Cr: 14.0–15.5%
• Ni: 3.5–5.5%
• Cu: 2.5–4.5%

Nā ʻokoʻa koʻikoʻi:

• ʻOi aku ka paʻakikī transverse ma muli o ka microstructure ʻoi aku ka maikaʻi
• Hoʻomaikaʻi ʻia nā waiwai mechanical i nā ʻāpana mānoanoa

Hoʻohana i nā hihia:

• ʻO nā hoʻoheheʻe aerospace
• ʻO nā lako hana kemika

13-8Mo (UNS S13800)

Huina:

• Cr: 12.25–13.25%
• Ni: 7.5–8.5%
• M: 2.0–2.5%

Nā ʻokoʻa koʻikoʻi:

• ʻOi aku ka paʻakikī a me ka pale ʻana i ka corrosion
• Ka ikaika kiʻekiʻe ma nā ʻāpana keʻa mānoanoa
• Nā mana haku mele paʻa no ka hoʻohana ʻana i ka lewa

Hoʻohana i nā hihia:

• Nā ʻāpana aerospace i kūkulu ʻia
• Nā punawai hana kiʻekiʻe

17-7PH (UNS S17700)

Huina:

• Cr: 16.0–18.0%
• Ni: 6.5–7.75%
• Al: 0.75–1.50%

Nā ʻokoʻa koʻikoʻi:

• Semi-austenitic; pono i ka hana anu a me ka wela
• ʻOi aku ka maikaʻi o ka formability akā haʻahaʻa haʻahaʻa i ka corrosion ma mua o 17-4PH

Hoʻohana i nā hihia:

• Aerospace diaphragms
• Bellows
• Punawai

Kuʻia 465 (UNS S46500)

Huina:

• Cr: 11.0–13.0%
• Ni: 10.75–11.25%
• Ti: 1.5–2.0%
• Mo: 0.75–1.25%

Nā ʻokoʻa koʻikoʻi:

• Ka ikaika kiʻekiʻe loa (a hiki i ka 200 ksi tensile)
• ʻOi aku ka paʻakikī haʻihaʻi
• ʻO ke kumukūʻai kiʻekiʻe

Hoʻohana i nā hihia:

• Nā mea hana ʻokiʻoki
• Nā mea hoʻopaʻa mokulele
• ʻO nā mea hoʻokele pae

Hoʻohālikelike Hoʻohāpai Wela

Hoʻohālikelike Kūʻē ʻino

• ʻOi loa:13-8Mo a me Kuʻuna 465
• Maikaʻi loa:17-4PH a me 15-5PH
• Pono:17-7PH

'Ōlelo Aʻo: ʻAʻohe mea i kūlike i ka pale ʻino o nā māka austenitic piha e like me 316L.

Mīkini a me Weldability

Noonoo Kumukuai

• ʻOi loa ke kumu kūʻai:17-4PH
• Nā Papa Kūlana:13-8Mo a me Kuʻuna 465
• Kaulike:15-5PH

Hoʻohālikelike Hoʻohālikelike

Hōʻuluʻulu manaʻo

Ka hopena

ʻOiai ʻo 17-4PH e noho mau ana i ke kila kila kila no ka nui o nā noi maʻamau, loaʻa i kēlā me kēia pae PH ʻokoʻa nā pōmaikaʻi ʻoi aku ka maikaʻi no nā koi kikoʻī. ʻO ka hoʻomaopopo ʻana i nā nuances ma waena o kēia mau alloys hiki i nā mea ʻenehana a me nā mea kūʻai aku ke hoʻoholo i ka ʻike e pili ana i ka ikaika, ka paʻakikī, ka pale ʻana i ka corrosion, a me ke kumukūʻai.