He aha ka ʻokoʻa ma waena o 17-4PH a me nā kila hoʻopaʻa-Precipitation (PH) ʻē aʻe?

He aha ka ʻokoʻa ma waena o 17-4PH a me nā kila hoʻopaʻa-Precipitation (PH) ʻē aʻe?

Hoʻolauna

ʻO nā kila kila paʻakikī-precipitation (PH steels) he papa o nā mea hao e kū'ē i ka corrosion e hoʻohui i ka ikaika o nā kila martensitic a me austenitic me ke kū'ē maikaʻi loa i ka corrosion. I waena o lākou,17-4PH kila kilaʻo ia paha ka mea i hoʻohana nui ʻia ma muli o kona mau waiwai mechanical kūikawā a me ka maʻalahi o ka hana ʻana. Akā pehea e hoʻohālikelike ʻia ai me nā papa PH ʻē aʻe e like me 15-5PH, 13-8Mo, 17-7PH, a me Custom 465? Ke luʻu hohonu nei kēia ʻatikala i nā ʻokoʻa o ka haku mele ʻana, ka mālama ʻana i ka wela, nā waiwai mechanical, ke kūpaʻa ʻana i ka pala, a me nā noi.

ʻIkepili o nā kila kila paʻakikī i ka ua

Loaʻa i nā kila hoʻopaʻakikī i ka ua ko lākou ikaika mai ka hoʻokumu ʻia ʻana o nā precipitates maikaʻi i loko o ka matrix kila i ka wā o nā mālama wela ʻelemakule. Ua māhele ʻia kēia mau kila i ʻekolu mau māhele nui:

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

Hāʻawi kēlā me kēia māhele i kahi hui kūikawā o nā waiwai i hana ʻia no nā pono ʻoihana kikoʻī.

17-4PH (UNS S17400): Ke Kūlana ʻOihana

Hoʻonohonoho ʻana:

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

Ka Lapaʻau Wela: I mālama ʻia me ka wai hoʻonā a hoʻomākua ʻia (maʻamau mai H900 a i H1150-M)

Nā Waiwai Mekanika (H900):

• Ikaika Tensile: 1310 MPa
• Ikaika Hua: 1170 MPa
• Hoʻolōʻihi: 10%
• Paʻakikī: ~44 HRC

Nā Pōmaikaʻi:

• Ikaika kiʻekiʻe
• Ke kūpaʻa kūpono i ka palaho
• Maikaʻi ka mīkini ʻana
• Hiki ke hoʻopili ʻia

Nā noi:

• Nā ʻāpana mokulele
• Nā mea hana nukelea
• Nā kiwikā, nā ʻau, nā mea hoʻopaʻa

Hoʻohālikelike me nā kila kila PH ʻē aʻe

15-5PH (UNS S15500)

Hoʻonohonoho ʻana:

• Ua like me 17-4PH, akā me nā kaohi paʻa loa ma luna o nā mea haumia
• Kr: 14.0–15.5%
• Ni: 3.5–5.5%
• Cu: 2.5–4.5%

Nā ʻokoʻa koʻikoʻi:

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

Nā Hihia Hoʻohana:

• Nā hana hoʻoheheʻe aerospace
• Nā lako hana kemika

13-8Mo (UNS S13800)

Hoʻonohonoho ʻana:

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

Nā ʻokoʻa koʻikoʻi:

• ʻOi aku ka paʻakikī a me ke kūpaʻa i ka palaho
• Ikaika kiʻekiʻe ma nā ʻāpana kea mānoanoa
• Nā kaohi hoʻonohonoho paʻa no ka hoʻohana ʻana i ka aerospace

Nā Hihia Hoʻohana:

• Nā ʻāpana aerospace kūkulu
• Nā pūnāwai hana kiʻekiʻe

17-7PH (UNS S17700)

Hoʻonohonoho ʻana:

• Kr: 16.0–18.0%
• Ni: 6.5–7.75%
• ʻAila: 0.75–1.50%

Nā ʻokoʻa koʻikoʻi:

• Semi-austenitic; koi i ka hana anu a me ka mālama wela
• ʻOi aku ka maikaʻi o ke ʻano akā ʻoi aku ka haʻahaʻa o ke kūpaʻa ʻana i ka pala ma mua o 17-4PH

Nā Hihia Hoʻohana:

• Nā diaphragms mokulele
• Nā ʻūlū
• Nā Punawai

Maʻamau 465 (UNS S46500)

Hoʻonohonoho ʻana:

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

Nā ʻokoʻa koʻikoʻi:

• Ikaika kiʻekiʻe loa (a hiki i ka 200 ksi tensile)
• Paʻakikī haʻihaʻi maikaʻi loa
• ʻOi aku ke kumukūʻai

Nā Hihia Hoʻohana:

• Nā mea hana ʻoki kino
• Nā mea hoʻopaʻa mokulele
• Nā ʻāpana pae ʻāina

Hoʻohālikelike ʻana i ka mālama wela

Hoʻohālikelike ʻana i ke kūpaʻa ʻana i ka palaho

• ʻOi loa:13-8Mo a me ke Kūʻokoʻa 465
• Maikaʻi loa:17-4PH a me 15-5PH
• Kūpono:17-7PH

Nānā: ʻAʻohe mea e like me ke kūpaʻa ʻana i ka pala o nā papa austenitic piha e like me 316L.

Ka hiki ke hana mīkini a me ka hiki ke hoʻopili ʻia

Ka Noʻonoʻo ʻana i ke Kumukūʻai

• ʻOi aku ka maikaʻi o ke kumukūʻai:17-4PH
• Nā Papa Kūlana Kiʻekiʻe:13-8Mo a me ke Kūʻokoʻa 465
• Kaulike:15-5PH

Hoʻohālikelike ʻana i nā noi

Hōʻuluʻulu manaʻo

Hopena

ʻOiai ʻo 17-4PH ke kila kila PH e pono ai no nā noi hana maʻamau he nui, loaʻa i kēlā me kēia papa PH ʻē aʻe nā pono kūikawā e ʻoi aku ka maikaʻi no nā koi kikoʻī. ʻO ka hoʻomaopopo ʻana i nā nuances ma waena o kēia mau alloys e hiki ai i nā ʻenekinia mea a me nā mea kūʻai ke hana i nā hoʻoholo naʻauao e pili ana i ka ikaika, ka paʻakikī, ke kūpaʻa i ka pala, a me ke kumukūʻai.