1. BS EN 10297-2 yog dab tsi?
Teb:
TS EN 10297-2 Cov txheej txheem Europeanseamless ncig stainless hlau rajrau mechanical thiab general engineering lub hom phiaj. Nws txhais cov kev xav tau rau:
Tshuaj muaj pes tsawg leeg
Mechanical zog (piv txwv li, tensile zog Ntau dua los yog sib npaug rau 640 MPa)
Dimensional kam rau ua
Cov kev sim (piv txwv li, hydrostatic, ultrasonic).
Ntsiab Lus: X2CrNiN23-4 yog duplex (austenitic-ferritic) stainless hlau qib raws li tus qauv no, zoo tagnrho rau corrosive thiab high-kev ntxhov siab ib puag ncig.
2. Cov khoom ntawm X2CrNiN23-4 yog dab tsi?
Teb:
Kev sib xyaw:
Cr (22-24%), Ni (3.5-5.5%), N (0.1-0.2%), Mo (0.1-0.6%), C Tsawg dua lossis sib npaug li 0.03%.
Qhov zoo:
High corrosion kuj (tshwj xeeb tshaj yog rau chlorides thiab pitting).
Lub zog zoo heev - qhov sib npaug ntawm cov khoom sib npaug (cov txiaj ntsig zoo tshaj plaws ntau dua lossis sib npaug li 450 MPa).
Weldability zoo nrog cov txheej txheem tsim nyog.
(Cov duab pom zoo: Microstructure ntawm duplex stainless hlau qhia austenite / ferrite theem)
3. Qhov twg yog qhov no steel raj feem ntau siv?
Teb:
Roj & Roj: Subsea pipelines, risers.
Kev ua tshuaj lom neeg: Reactors, kub exchangers.
Zog: Cov khoom siv fais fab (siab-kub/siab).
Kev tsim kho: ntug dej hiav txwv infrastructure (kwv yees tsis kam).
4. Dab tsi yog kev ceev faj machining?
Teb:
Vuam: Siv duplex- qib muab tub lim hlau (xws li ER2209); tswj cov khoom siv hluav taws xob kom tsis txhob σ-theem embrittlement.
Ua haujlwm txias: Annealing pom zoo ncej- tsim vim muaj hardness siab.
Txiav: Zam cov cuab yeej carbon steel los tiv thaiv kev sib kis.
5. Yuav ua li cas txheeb xyuas kev ua raws li BS EN 10297-2?
Teb:
Kev sim:
Tshuaj ntsuam xyuas (spectrometry).
Mechanical xeem (tensile, hardness).
Tsis yog -kev kuaj kev puas tsuaj (UT, eddy tam sim no).
Microstructure check (ferrite / austenite piv ~ 50/50).
