Duplex Stainless Hlau?
Duplex Stainless hlau stainless hlau yog qhov kev ua tau zoo stainless hlau nrog ob-theem microstructure ntawm ferrite thiab austenite, nrog ob theem muaj kev sib piv ntawm 1: 1. Nws cov qauv sib txawv dual yog ua tiav los ntawm sib txawv ntawm cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov ntsiab lus siab ntawm ferrosion nrog qhov zoo tshaj plaws corrosion thiab tawv ntawm Austenite.
Cov yam ntxwv ntawm cov hlau dulex:
- Siab Zog
- Zoo heev corrosion
- Zoo Weldability
Unc unic s31803Thiab Uns Unrert S32205 yog ob qho piv txwv ntawm cov chav hlau zoo li.
S31803 chav hlau yog ib hom tshiab ntawm stainless hlau alloy tsim ntawm 1980s thiab thaum ntxov 1990s. Tsoos Austenitic Auless Stainless hlau tau nquag ua rau muaj kev ntxhov siab hauv qhov tshwj xeeb, ua tsis tau rau ntau thaj chaw muaj tshwj xeeb. S31803 Duplex Stainless hlau tau tsim los daws cov teebmeem no.
S32205Yog thawj qib ntawm qib thib ob ntawm cov qauv Duplex Stuple, nitrogen-txhim kho cov hlau. Raws li S31803, nws tsa cov kev txwv qis ntawm chromium, molybdenum, thiab nitrogen, yog li txhim kho cov neeg kho tshuab ntxim nyiam.
Kev sib piv ntawm S31803 thiab S32205 Duplex Stainless Hlau
1. Tshuaj lom neeg sib xyaw
(Raws li ASTM A789 和 A790)
|
Teem nqi |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
N |
Zaum fe |
|
S31803 |
Tsawg dua los yog sib npaug rau 0. 03 |
Tsawg dua los yog sib npaug rau 2. 00 |
Tsawg dua los yog sib npaug rau 0. 030 |
Tsawg dua li lossis sib npaug rau 0. 020 |
Tsawg dua los yog sib npaug rau 1. 00 |
4.50-6.50 |
21.00-23.00 |
2.50-3.50 |
0.08-0.20 |
So |
|
S32205 |
Tsawg dua los yog sib npaug rau 0. 03 |
Tsawg dua los yog sib npaug rau 2. 00 |
Tsawg dua los yog sib npaug rau 0. 030 |
Tsawg dua li lossis sib npaug rau 0. 020 |
Tsawg dua los yog sib npaug rau 1. 00 |
4.50-6.50 |
22.00-23.00 |
3.00-3.50 |
0.14-0.20 |
So |
Hauv kev sib piv rau S31803, S32205 muaj ib qho nqaim ntau ntawm cov ntsiab lus tsawg dua, feem ntau muaj zog dua ntawm cov ntsiab lus nitrogen, uas muaj zog dua thiab corrosion tsis kam.
Vim tias nws cov ntsiab lus tshaj tawm tag nrho cov ntsiab lus, S32205 muaj tus nqi siab dua li S31803, qhia tias nws yog cov kev xaiv ntau yam hauv kev sib hwm txhua qhov kev mob corrosive.
- CR: txhim kho cov hlau hluav taws xob kub siab tiv thaiv.
- Mo tau txhim kho qhov pitting resistance ntawm cov hlau stainless.
- N: Ntxiv dag zog rau alloy thiab nce lub pitting thiab crevice corrosion tsis kam ntawm Austenitic thiab Duplex stainless hlau stainless hlau.
2. Cov Khoom Siv Neeg Kho Tshuab
|
S31803 |
S32205 |
|
|
Lub zog tensile, ksi [MPA] |
Ntau dua los yog sib npaug rau 90 [620] |
Ntau dua los yog sib npaug rau 95 [655] |
|
Pepred lub zog, ksi [MPA] |
Ntau dua los yog sib npaug rau 65 [450] |
Ntau dua los yog sib npaug rau 70 [485] |
|
Elongation,% |
Ntau dua los yog sib npaug rau 25 |
Ntau dua los yog sib npaug rau 25 |
|
Kev nyuaj |
Tsawg dua los yog sib npaug rau 290 hbw Tsawg dua los yog sib npaug rau 30 teev |
Tsawg dua los yog sib npaug rau 290 hbw Tsawg dua los yog sib npaug rau 30 teev |
S32205 muaj lub zog siab dua tensile muaj zog yuav tsum muaj
3. Kev kho cua sov
Tej Yam Cua Sov Yuav Tsum Tau Rau S31803 thiab S32205 zoo tib yam:
- Kev kho cua sov ntawm 1020-1100 degree [1870-2010} ℉] nrog cov dej txias txias hauv dej lossis huab cua.
4. Kuj corrosion
Vim tias S32205 muaj ib qho tsim nyog ntau dua Alloy cov ntsiab lus ntau, nws muaj tus nqi siab dua li S31803, uas txhais tau tias nws yog tiv taus ntau dua pitting.
- S32205: Pren ntau dua los yog sib npaug rau 34.14
- S31803: Pren ntau dua lossis sib npaug rau 30.53
5. Ua cov teeb meem
- Kub thawj:
S32205 muaj qhov nqaim kub ua haujlwm ntau dua s31803 vim nws cov nitrogen siab thiab rhiab rau kev tswj kom kub.
- Txias tsim:
Ob qho tib si muaj qhov tseem ceeb rau kev ua haujlwm nyuaj vim tias ua haujlwm txias, nws yuav tsum tau ua haujlwm ntau thiab muaj kev sib txuas nruab nrab.
S32205 muaj lub zog siab dua thiab muaj peev xwm pom txias dua, ua rau nws nyuaj dua cov duab.
Peb tuaj yeem muab cov kev siv yeeb nkab xaim hauv ob yam: S31803 thiab S32205
Od: 3. 175-325 hli
Wt: {{0. {{{1} hm mm
Qauv: ASTM A789 & ASTM A790
