Duplex steel birta aan birta lahayn 2205 habka alxanka iyo taxadarka

1. Jiilka labaad ee birta birta ah ee birta ah ee duplex waxay leedahay sifooyinka kaarboon-hooseeya, nitrogen hooseeya, halabuurka caadiga ah Cr5% Ni0.17% n iyo 2205 nitrogen ka sarreeya jiilka kowaad ee birta birta ah ee birta ah, taas oo hagaajinaysa iska caabinta daxalka walbahaarka iyo iska caabbinta xayndaabka warbaahinta aashitada leh ee xoogga leh ee chloride-ka.Nitrojiinku waa curiye samays adag oo austenite ah.Ku darida nitrogen ee birta birta ah ee duplex ma aha oo kaliya inay hagaajiso caagagga iyo adkaanta birta iyada oo aan waxyeello muuqda lahayn, laakiin sidoo kale waxay hagaajinaysaa xoogga birta, waxayna joojisaa roobabka iyo dib u dhigista karbides.

2. Hawlaha abaabulka: Aqalka aqalka dhirta lagu koriyo, austenite iyo ferrite waxay ku xisaabtamaan kala badh xalka adag, kaas oo leh sifooyinka qaab-dhismeedka biphase.Waxay haysaa sifooyinka tiro yar oo ka mid ah dabaylaha birta ah ee ferritic, iska caabinta godad, dildilaaca iyo daxalka chloride stress, oo leh adayg wanaagsan, heerkulka embrittlement hoose, caabbinta daxalka intergranular iyo guryaha farsamo iyo weldability wanaagsan.

3. Under xaaladaha heerka cadaadiska la mid ah badbaadin kara alaabta, xoogga dhalidda iyo stress iska caabin daxalka ee birta duplex ahama birta ah ku dhawaad ​​1 jeer in of austenitic ahama, iskudar ballaarinta toosan waa ka yar austenitic ahama birta ah austenitic ahama. Nidaamka birta, iyo birta kaarboonka ee hooseeya ayaa ku dhow.Been abuurka qabow uma fiicna sida birta austenitic.

4. Weldability: birta birta ah ee duplex 2205 waxay leedahay weldability wanaagsan, alxanka qabow, dareenka dillaaca kulul waa yar yahay, inta badan ma laha preheating ka hor alxanka, ma daaweyn kulaylka ka dib alxanka.Sababtoo ah u janjeera yar ee ferrite hal-waji ah iyo content nitrogen sare ee aagga kulaylku saameeyay, tamarta silig alxanka lagu xakameyn karaa waqtigan marka alaabta alxanka si macquul ah loo doortay, iyo waxqabadka dhamaystiran waa wanaagsan.

5. Dildilaaca kulul: Dareenka dildilaaca kulul aad ayuu uga hooseeyaa kan birta aan lahayn austenitic.Tani waa sababta oo ah maadada nikkelku ma sarreeyso, wasakhda fudud ee loo sameeyo eutectic-dhalaalaya waa hooseeyaa, filimka dareeraha ah ee leh barta dhalaalka hoose ma fududa in la soo saaro, korriinka degdega ah ee khatarta hadhuudhka ma jiro heer sare. heerkulka.

6. Jajabka aagga kulaylku saameeyay: Dhibaatada ugu weyn ee alxanka birta birta ah ee laba-laaban waa aagga kulaylku saameeyay.Sababo la xiriira saamaynta qaboojinta degdega ah ee aagga kulaylku saameeyay ee aan dheellitirka lahayn ee wareegga kulaylka alxanka, ferrite badan oo qaboojiyey ayaa had iyo jeer la hayaa, taas oo u janjeerta inay kordhiso dareenka daxalka iyo dildilaaca hydrogen-ka.

7. Biraha alxanka: Inta lagu guda jiro habka alxanka ee birta duplex ah, oo hoos timaad dhaqdhaqaaqa baaskiilka kulaylka, microstructure-ka iyo aagga kulaylka saameeya ee birta alxanka ayaa soo maray isbedelo isdaba joog ah.Heerkulka sare, qaab-dhismeedka-yar ee birta-duplex-ka ee birta aan lahayn waxaa soo dada ferrite iyo austenite inta lagu jiro qaboojinta.Qadarka roobabka austenite waxaa saameeya arrimo badan.