1. Q: Dab tsi txhais tau hais tias EN10297-2 X2CrNi19-11 raj, thiab lawv siv qhov twg?
A:
Khoom siv Standard:Seamless precision raj hauv qabTS EN 10297-2, ua los ntawmX2CrNi19-11(ib qho qis- carbon austenitic stainless hlau, sib npaug rau AISI 304L nrog hloov pauv Ni / Cr piv).
Cov ntawv thov tseem ceeb:
Kev ua tshuaj lom neeg:Pipelines rau acetic / phosphoric acid tuav (resists pitting corrosion).
Nuclear:Lub tshuab ua kom txias txias (pom zoo rau qhov nruab nrab hluav taws xob ib puag ncig).
Kev lag luam zaub mov:Brewery fermentation tanks (kev tu cev, tsis yog-reactive nto).
Qhov zoo:
Weldability:Tsis muaj kev tshaj tawm -weld kev kho cua sov yuav tsum tau (C Tsawg dua lossis sib npaug li 0.03%).
Cryogenic Suitability:Impact toughness Ntau dua los yog sib npaug rau 80 J ntawm -196 degree.
2. Q: Cov khoom siv tshuab dab tsi tau teev tseg hauv EN10297-2?
A:
Raws li -Annealed State:
Tensile zog:520-720 MPa.
Yield zog (Rp0.2):Ntau dua lossis sib npaug li 210 MPa.
Elongation (A₅):Ntau dua los yog sib npaug li 40% (tseem ceeb rau qhov txias- sib sau).
Hardness:Tsawg dua lossis sib npaug li 200 HB.
High -Tsub Ua Haujlwm:Khaws ntau dua lossis sib npaug rau 60% tawm lub zog ntawm 600 degree.
3. Q: Qhov sib npaug Ni / Cr (19% Cr, 11% Ni) cuam tshuam li cas?
A:
Cr (18.0-20.0%):Cov ntaub ntawv ruaj khovCr₂O₃ passive txheejtiv thaiv oxidizing media.
Niag (10.0–12.0%):
Stabilizes austenite theem ntawm cryogenic kub.
Txhim kho ductility thiab kev nyuaj siab corrosion cracking (SCC) kuj.
Cov pa roj carbon tsawg (tsawg dua lossis sib npaug rau 0.03%):Tiv thaiv rhiab heev thaum vuam.
4. Q: Dab tsi yog cov tshuaj muaj pes tsawg leeg thiab impurity txwv?
A:
Alloy Design (wt.%):
Cr (18.0-20.0%):Base corrosion kuj.
Niag (10.0–12.0%):Austenite stabilization.
Mo (tsawg dua lossis sib npaug rau 0.20%):Cov ntsiab lus taug qab (tsis zoo li 316L).
N (tsawg dua lossis sib npaug rau 0.11%):Txhim kho yam tsis muaj kev txo qis ductility.
Critical Control: P/S Tsawg dua lossis sib npaug li 0.045%kom tsis txhob kub tawg.
5. Q: Cov ntawv pov thawj thiab cov ntawv pov thawj zoo li cas?
A:
Kev Ntsuas Cov Txheej Txheem:
Kev kuaj Corrosion:ASTM G48 Txoj Kev A (pitting kuj, CPT Ntau dua lossis sib npaug li 25 degree).
NDT:Phased -array UT (EN ISO 17640) rau weld seam kev ncaj ncees.
Cov ntawv pov thawj:
EN 10204 3.2nrog tag nrho traceability.
ASME SWB-688rau nuclear auxiliary Cheebtsam.
