Kev faib tawm thiab tsom xam ntawm stainless hlau bolt cov ntaub ntawv
Mar 27, 2025
Hauv kev thov engineering, cov neeg siv feem ntau nug txog "qib" ntawm stainless hlau bolts. Nws yuav tsum tau qhia meej tias lub zog kawm tau xws li 8.8 lossis 4.8 siv rau xwbCarbon Hlau Bolts, thaum stainless hlau bolts ua raws cov qauv kev kawm sib txawv nkaus. Cov kev lag luam feem ntau siv cov khoom siv cov khoom siv xws li Sus304, thiab cov qib tshwj xeeb xws liA2-70thiabC1-110Hauv qabISO 3506Txheem.
1. Lub zog lub zog rau cov hlau stainless bolts
Lub zog ntawm stainless hlau bolts yog hais txog los ntawm cov cim tshwj xeeb:
A2-70: Austenitic Stainless Hlau (piv txwv li, 304), yam tsawg kawg tensile lub zog700 MPa, tawm lub zog zog ntau dua los yog sib npaug rau 450 MPa (ISO 3506).
A4-80: Austenitic stainless hlau (piv txwv li, 316), yam tsawg kawg tensile lub zog800 MPa, tawm lub zog zog ntau dua los yog sib npaug rau 600 MPa.
C1-110: Martensitic Stainless Hlau (piv txwv li, 12cr13 quenched thiab tempered), tensile lub zog1100-1400 MPA, tawm los ntawm lub zog ntau dua los yog sib npaug rau 820 MPa.
[Nco tseg: Lub zog faib tawm rau cov hlau tsis muaj menyuam yaus los ntawm cov roj carbon steel. Kev xaiv engineering yuav tsum haum nrog cov lej tshwj xeeb no.]
2. Kev faib tawm ntawm cov ntaub ntawv stainless hlau
2.1 Austenitic Stainless Hlau(Feem ntau siv siv)
Cov qib: 304 (06cr19NI10), 316 (022cr17ni12mo2).
Cov Khoom Siv: Tsis yog-sib nqus, zoo heev corrosion tsis kam.
Cov Ntawv Thov: Dav fasteners (hex bolts, neeg rau,lwm yam).
2.2 Duplex Stainless Hlau
Cov qib: 2205 (unsalial s31803 / s32205 / 022cr23ni5mo3n).
Cov Khoom Siv: Tensile lub zog ** ntau dua los yog sib npaug ntawm 640 MPa rau 640 mpa}}}} {degree (
Cov Ntawv Thov: Cov khoom siv tshuaj lom neeg, cov platform ntug dej.
Txheem siv: Iso 3506-1}}: 2020.
2.3 Martensitic Stainless Hlau
Cov qib: 410 (12CR13, 420 (20CR13).
Cov Khoom Siv: Cov cua sov, sib nqus. Cov kev kho saum npoo (piv txwv li, passivation lossis epoxy txheej) yuav tsum tau xaiv raws li ib puag ncig; Galvanizing / chromium plating tej zaum yuav txo corrosion tsis kam.
Cov Ntawv Thov: Turbine hniav tuaj, lub siab-zog shafts.
3. Cov Khoom Siv Khoom Tseem Ceeb
3.1 Cov ntsiab lus npib tsib xee
3 {0 4: 8-1 0}}}% ni; 316: 10-14% ni (Suav txheej txheem 022cr17NI12MO2 qhia meej 10.0-14.0% ni).
Molybdenum (2-3% hauv 316) txhim kho cov tshuaj dawb ion tsis kam.
3.2 Cov ntsiab lus carbon
Austenitic Steel: tsawg dua los yog sib luag rau {{{{{{}}}}}}. 08% (ultra-tsawg dua los yog sib luag rau 0.03%).
MARTENENTITIC steel: {{0}}}. 15-0.40%.
3.3 Chromium cov ntsiab lus
Tag nrho cov hlau tsis muaj ntau dua lossis sib npaug rau 12% CR los ua ib txheej passivation.
4. Hais meej ntawm cov kev ua kom nkag
4.1 Lub Zog Vs. Corrosion Kuj
316 ({{4-80}) muaj lub zog siab dua (800 mpa) dua li 304 (700 mpa) thiab}
4.2 Vuam xyaum
Siv cov hlau roj carbon vuam (piv txwv li, er3 0 8l nrog tsawg dua lossis sib npaug}. {}} 3% c); Carbon Hlau Hlau (0.0-0.15% C) raug txwv.
4.3 Kev kho cov npoo npoo
Rau cov tub rog ib puag ncig:passivationlossisChromium-DaCromet (Zinc-Txhuas Txhuas)Cov. Tsoos dacromet (muaj cov chromomet (muaj cov chromates) yog ua ntu rau ib puag ncig.
Harsh qhov chaw nres tsheb: txuas ntxiv rau ntsev tshuaj tsuag (NSS) kuaj rau2000 teev (ISO 9227: 2017), tsis yog cass (tooj liab-nrawm ntsev tsuag tsuag).
5. Tswjhwm
5.1 Tshuaj lom neeg tshuaj lom neeg kuaj
Cov ntsiab lus: CR (ntau dua los yog sib npaug rau 12%), NI (316 loj dua lossis sib npaug lossis sib npaug) tsawg dua lossis sib npaug rau 0.08%).
5.2 Neeg kho tshuab kev ntsuas
Cov hlau tsis muaj zog: tawm los ntawm lub zog ntau dua lossis sib npaug rau 210 MPa (GB / T 3098.6).
Hardness ntau yam: {2-70 sib haum rau HV 210-300.
5.3 Corrosion Resportion
Ntsev txau mus: Loj dua los yog sib npaug rau 480 teev (ISO 9227 NSS Txuj), txuas ntxiv rau2000 teevrau cov chaw hnyav.
Intergranular Corrosion: ASTM A262.
6. Cov kev sib nrug rau cov cross-siv (kho tshiab rau ib GB / t {2}})
| Hom | US tus qauv | Suav Txuj Ci | Tensile lub zog (mpa) | Txheem siv |
|---|---|---|---|---|
| AUSTENITIC | 304 | 06cr19NI10 | 700 | Iso 3506-1}}: 2020 |
| AUSTENITIC | 316 | 022cr17ni12mo2 | 800 | Iso 3506-1}}: 2020 |
| Duplex | 2205 | 022cr23ni5mo3n | ** ntau dua los yog sib npaug rau 640 ** | Iso 3506-1}}: 2020 |
| Tus ntaus rog | 410 | 12C3 | Ntau dua los yog sib npaug rau 440 | GB / T 1220-2022 |
| Martensitic (qt) | - | 12C13 Quenched & Tempered | 1100–1400 | Iso 3506-1}}: 2020 |