Taw qhia
Duplex 2205 stainless hlau (ob leeg ferritic thiab austenitic) yog siv dav hauv cov ntawv thov uas yuav tsum muaj kev tiv thaiv corrosion zoo thiab lub zog.S31803 qib stainless hlau tau dhau los ntawm ntau qhov kev hloov kho uas ua rau UNS S32205, thiab tau pom zoo rau xyoo 1996. Cov qib no muaj kev tiv thaiv corrosion ntau dua.
Ntawm qhov kub siab tshaj 300 ° C, nkig micro-cov ntsiab lus ntawm qib no tau los nag, thiab ntawm qhov kub qis dua -50 ° C cov micro-cov khoom tau hloov pauv hloov mus rau ductile;yog li no qib ntawm stainless hlau tsis haum rau kev siv ntawm cov kub no.
Cov khoom tseem ceeb
Stainless hlau - Qib 2205 Duplex (UNS S32205)
Cov khoom uas tau hais hauv cov lus hauv qab no muaj feem xyuam rau cov khoom lag luam tiaj tus xws li daim hlau, cov ntawv thiab cov coils ntawm ASTM A240 lossis A240M.Cov no yuav tsis zoo ib yam ntawm lwm yam khoom xws li tuav thiab kav dej.
Kev sib xyaw
Stainless hlau - Qib 2205 Duplex (UNS S32205)
Table 1 muab cov kev sib xyaw ua ke rau qib 2205 duplex stainless hlau.
Table 1- Muaj ntau hom rau 2205 qib stainless hlau
| Qib | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (S31803) TSİ | Min Max | - 0.030 Nws | - 2.00 Nws | - 1.00 Nws | - 0.030 Nws | - 0.020 ib | 21.0 Nws 23.0 Nws | 2.5 3.5 | 4.5 6.5 | 0.08 ib 0.20 ib |
| 2205 (S32205) XYOO | Min Max | - 0.030 Nws | - 2.00 Nws | - 1.00 Nws | - 0.030 Nws | - 0.020 ib | 22.0 Nws 23.0 Nws | 3.0 3.5 | 4.5 6.5 | 0.14 ib 0.20 ib |
Mechanical Properties
Cov khoom siv kho tshuab raug ntawm qib 2205 stainless hlau tau teev nyob rau hauv cov lus hauv qab no.Qib S31803 muaj cov khoom zoo sib xws rau S32205.
Rooj 2- Mechanical zog ntawm 2205 qib stainless hlau
| Qib | Tensile Str | Yield zog | Elongation | Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| 2205 | 621 ib | 448 ib | 25 | 31 max | 293 max ua |
Lub cev muaj zog
Stainless hlau - Qib 2205 Duplex (UNS S32205)
Lub cev lub cev ntawm qib 2205 stainless hlau yog tabulated hauv qab no.Qib S31803 muaj lub cev zoo sib xws rau ntawm S32205.
Table 3- Lub cev muaj zog ntawm 2205 qib stainless hlau
| Qib | Qhov ntom | Elastic (GPa) | Txhais tau tias Co-eff ntawm Thermal | Kub | Tshwj xeeb (J/kg.K) | Hluav taws xob | |||
| 0-100 ° C | 0-315 ° C | 0-538 ° C | ntawm 100 ° C | ntawm 500 ° C | |||||
| 2205 | 7800 ib | 190 | 13.7 ib | 14.2 | - | 19 | - | 418 | 850 |
Qib Specification piv
Stainless hlau - Qib 2205 Duplex (UNS S32205)
Table 4 muab kev sib piv qib rau 2205 stainless hlau.Cov txiaj ntsig yog qhov sib piv ntawm cov khoom siv zoo sib xws.Qhov sib npaug tiag tiag tuaj yeem tau txais los ntawm cov thawj specifications.
Rooj 4-Qib specification sib piv rau 2205 qib stainless hlau
| Qib | UNS | Laus British | Euronorm | Swedish SS | Nyiv JIS | ||
| BS | En | No | Lub npe | ||||
| 2205 | S31803 / S32205 | 318 S13 | - | 1.4462 ib | X2CrNiMoN22-5-3 | 2377 ib | SUS 329J3L |
Cov qhab nia xaiv tau
Muab hauv qab no yog cov npe ntawm cov qhab nia ua tau, uas tej zaum yuav raug xaiv los ntawm 2205.
Table 5-Qib specification sib piv rau 2205 qib stainless hlau
| Qib | Yog vim li cas xaiv cov qib |
| 904l ua | Kev tsim kho kom zoo dua yog xav tau, nrog rau qhov zoo sib xws corrosion thiab qis zog. |
| UA 52N+ | Yuav tsum muaj kev tiv thaiv corrosion siab, xws li kev tiv thaiv rau cov dej hiav txwv kub dua. |
| 6% Mo | Yuav tsum muaj kev tiv thaiv corrosion siab dua, tab sis nrog qis zog thiab zoo formability. |
| 316l ua | Lub siab corrosion kuj thiab lub zog ntawm 2205 tsis xav tau.316L yog tus nqi qis dua. |
Corrosion Resistance
Cov Dab Neeg
Qib 2205 stainless hlau nthuav tawm zoo heev corrosion kuj, ntau dua li ntawm qib 316. Nws tiv taus cov kab mob hauv zos xws li intergranular, crevice thiab pitting.CPT ntawm no hom stainless hlau yog nyob ib ncig ntawm 35 ° C.Qib no tiv taus chloride stress corrosion cracking (SCC) ntawm qhov kub ntawm 150 ° C.Qib 2205 stainless hlau yog qhov hloov tau zoo rau cov qib austenitic, tshwj xeeb tshaj yog nyob rau hauv qhov chaw tsis ua hauj lwm ntxov thiab ib puag ncig marine.
Thaum tshav kub kub Resistance
Cov cuab yeej oxidation siab ntawm Qib 2205 yog marred los ntawm nws cov embrittlement saum 300 ° C.Qhov embrittlement no tuaj yeem hloov kho los ntawm kev daws teeb meem kev kho mob tag nrho.Qib no ua tau zoo ntawm qhov kub siab tshaj 300 ° C.
Kev kho cua sov
Qhov kev kho cua sov zoo tshaj plaws rau qib no yog kev kho cov tshuaj (annealing), nruab nrab ntawm 1020 - 1100 ° C, tom qab ntawd txias txias.Qib 2205 tuaj yeem ua haujlwm nyuaj tab sis tsis tuaj yeem ua kom tawv los ntawm cov txheej txheem thermal.
Vuam
Cov txheej txheem vuam feem ntau haum rau qib no, tshwj tsis yog vuam tsis muaj cov hlau muab tub lim, uas ua rau ntau tshaj ferrite.AS 1554.6 ua ntej tsim nyog welding rau 2205 nrog 2209 rods los yog electrodes kom cov deposited hlau muaj txoj cai balanced duplex qauv.
Ntxiv nitrogen rau lub shielding gas kom paub meej tias txaus austenite ntxiv rau cov qauv.Cov khoom siv hluav taws xob yuav tsum tau khaws cia nyob rau theem qis, thiab kev siv cov cua sov ua ntej lossis tom qab yuav tsum zam.Lub co-efficient ntawm thermal expansion rau qib no yog tsawg;yog li qhov kev sib txawv thiab kev ntxhov siab tsawg dua li cov qib austenite.
Tshuab dhos
Lub machinability ntawm qib no yog tsawg vim nws lub zog siab.Qhov kev txiav ceev yog yuav luag 20% qis dua li qib 304.
Fabrication
Kev tsim ntawm qib no kuj cuam tshuam los ntawm nws lub zog.Kev khoov thiab tsim cov qib no yuav tsum muaj cov khoom siv nrog lub peev xwm loj dua.Ductility ntawm qib 2205 tsawg dua austenitic qib;yog li ntawd, lub taub hau txias tsis tuaj yeem ua tau ntawm qib no.Txhawm rau ua cov haujlwm txias txias ntawm qib no, qhov nruab nrab annealing yuav tsum tau ua.
Daim ntawv thov
Qee qhov kev siv ntawm duplex steel qib 2205 yog teev hauv qab no:
- Kev tshawb nrhiav roj thiab roj
- Cov cuab yeej ua haujlwm
- Kev thauj mus los, kev cia khoom thiab kev ua tshuaj lom neeg
- High chloride thiab marine ib puag ncig
- Paper machines, cawv tanks, pulp thiab ntawv digesters
Post lub sij hawm: Mar-11-2023