Qhov txawv ntawm 17-4PH thiab lwm yam Precipitation-Hardening (PH) Steels yog dab tsi?

Qhov txawv ntawm 17-4PH thiab lwm yam Precipitation-Hardening (PH) Steels yog dab tsi?

Kev Taw Qhia

Cov hlau tsis xeb uas ua rau nag lossis daus (PH steels) yog ib chav kawm ntawm cov hlau uas tiv taus xeb uas sib xyaw ua ke lub zog ntawm cov hlau martensitic thiab austenitic nrog kev tiv taus xeb zoo heev. Ntawm lawv,17-4PH stainless hlautej zaum yog qhov siv dav tshaj plaws vim nws cov khoom siv kho tshuab zoo heev thiab yooj yim tsim. Tab sis nws piv rau lwm cov qib PH xws li 15-5PH, 13-8Mo, 17-7PH, thiab Custom 465 li cas? Tsab xov xwm no dhia tob rau hauv qhov sib txawv ntawm kev sib xyaw, kev kho cua sov, cov khoom siv kho tshuab, kev tiv thaiv corrosion, thiab daim ntawv thov.

Kev Txheeb Xyuas Txog Cov Hlau Stainless Uas Ua Rau Nag Los Thiab Ua Rau Ruaj Khoov

Cov hlau uas ua kom tawv thaum nag los tau txais lawv lub zog los ntawm kev tsim cov av me me hauv cov hlau thaum lub sijhawm kho cua sov. Cov hlau no muab faib ua peb pawg tseem ceeb:

1. Cov hlau Martensitic PH(piv txwv li,17-4PH, 15-5PH)
2. Cov hlau PH semi-austenitic(piv txwv li, 17-7PH)
3. Cov hlau Austenitic PH(piv txwv li, A286)

Txhua pawg muaj kev sib xyaw ua ke ntawm cov khoom vaj khoom tsev uas tsim los rau cov kev xav tau tshwj xeeb hauv kev lag luam.

17-4PH (UNS S17400): Tus Txheej Txheem Kev Lag Luam

Kev sau ua ke:

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

Kev Kho Mob KubKho cov tshuaj thiab laus (feem ntau H900 txog H1150-M)

Cov Khoom Siv Kho Tshuab (H900):

• Lub zog tensile: 1310 MPa
• Lub zog tawm los: 1170 MPa
• Kev ntev: 10%
• Qhov nyuaj: ~ 44 HRC

Cov txiaj ntsig:

• Muaj zog heev
• Kev tiv thaiv corrosion nruab nrab
• Kev siv tshuab zoo
• Weldable

Cov ntawv thov:

• Cov khoom siv dav hlau
• Cov chaw tsim hluav taws xob nuclear
• Cov li qub, cov ncej, cov khoom siv txuas

Kev Sib Piv Nrog Lwm Cov Hlau Stainless PH

15-5PH (UNS S15500)

Kev sau ua ke:

• Zoo ib yam li 17-4PH, tab sis muaj kev tswj hwm nruj dua ntawm cov khoom tsis huv
• Cr: 14.0–15.5%
• Ni: 3.5–5.5%
• Cu: 2.5–4.5%

Qhov Txawv Tseem Ceeb:

• Zoo dua transverse toughness vim yog finer microstructure
• Cov khoom siv kho tshuab zoo dua hauv cov ntu tuab dua

Cov Qauv Siv:

• Kev tsim kho vaj tse hauv aerospace
• Cov khoom siv ua tshuaj lom neeg

13-8Mo (UNS S13800)

Kev sau ua ke:

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

Qhov Txawv Tseem Ceeb:

• Kev ua haujlwm zoo thiab kev tiv thaiv corrosion
• Muaj zog heev ntawm cov ntu tuab dua
• Kev tswj hwm cov khoom sib xyaw kom nruj rau kev siv hauv aerospace

Cov Qauv Siv:

• Cov khoom siv hauv aerospace
• Cov caij nplooj ntoos hlav ua haujlwm siab

17-7PH (UNS S17700)

Kev sau ua ke:

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

Qhov Txawv Tseem Ceeb:

• Semi-austenitic; xav tau kev ua haujlwm txias thiab kev kho cua sov
• Zoo dua formability tab sis qis dua corrosion tsis kam dua li 17-4PH

Cov Qauv Siv:

• Cov diaphragms aerospace
• Cov Bellows
• Cov dej ntws

Kev Cai 465 (UNS S46500)

Kev sau ua ke:

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

Qhov Txawv Tseem Ceeb:

• Lub zog siab heev (txog li 200 ksi tensile)
• Kev tawg zoo heev
• Tus nqi siab dua

Cov Qauv Siv:

• Cov cuab yeej phais
• Cov khoom siv rau lub dav hlau
• Cov khoom siv tsaws av

Kev Sib Piv Txog Kev Kho Mob Kub

Kev Sib Piv Txog Kev Tiv Thaiv Kev Xeb

• Zoo Tshaj Plaws:13-8 Lub Hlis thiab Kev Cai 465
• Zoo:17-4PH thiab 15-5PH
• Ncaj ncees:17-7PH

Lus Cim: Tsis muaj ib qho sib xws nrog qhov tsis kam ntawm corrosion ntawm cov qib austenitic tag nrho zoo li 316L.

Kev Siv Tau Thiab Kev Sib Txuas Lus

Kev Xav Txog Tus Nqi

• Tus Nqi Zoo Tshaj Plaws:17-4PH
• Cov Qib Zoo Tshaj Plaws:13-8 Lub Hlis thiab Kev Cai 465
• Sib npaug:15-5PH

Kev Sib Piv ntawm Cov Ntawv Thov

Kev Txheeb Xyuas

Xaus lus

Txawm hais tias 17-4PH tseem yog cov hlau tsis xeb PH uas siv rau ntau yam kev siv dav dav, txhua qib PH lwm yam muaj cov txiaj ntsig sib txawv uas ua rau nws haum rau cov kev xav tau tshwj xeeb. Kev nkag siab txog qhov sib txawv ntawm cov hlau no ua rau cov kws ua khoom siv thiab cov neeg yuav khoom txiav txim siab raws li lub zog, kev tawv, kev tiv thaiv xeb, thiab tus nqi.