1. EN 10297 X1NiCrMoCuN25-20-7 yog dab tsi?
Teb:
TS EN 10297 X1NiCrMoCuN25-20-7super austenitic stainless hlau seamless rajRaws li European tus qauv EN 10297, tsim rau huab cua corrosion kuj nyob rau hauv ib puag ncig hnyav.
Lub ntsiab lus tseem ceeb:25% Ni, 20% Cr, 7% Mo, 1% Cu, thiab nitrogen (N) rau kev txhim kho lub zog.
Qib sib npaug:UNS S31277 (Alloy 27-7Mo), DIN 1.4529.
Feature tseem ceeb: PREN >50, muab qhov tsis sib xws rau pitting, crevice corrosion, thiab kev ntxhov siab corrosion cracking (SCC) nyob rau hauv chloride / sulfide ib puag ncig.
2. Cov khoom siv tshuab yog dab tsi?
Teb (kev kho mob annealed):
Tensile zog:750-950 MPa
Yield zog (0.2% offset):Ntau dua lossis sib npaug li 400 MPa (siab tshaj tus qauv 6Mo alloys)
Elongation:Ntau dua lossis sib npaug li 35%
Hardness:Tsawg dua lossis sib npaug li 250 HB
Nco tseg:Nitrogen thiab molybdenum synergistically boost lub zog thaum tswj ductility.
3. Nws piv rau lwm cov qib super austenitic li 254 SMO (X1CrNiMoCuN20-18-7) li cas?
Teb:
Cov ntsiab lus siab dua Alloy:Nce Mo (7% vs. 6%) thiab Ni (25% vs. 20%) txhim kho kev ua tau zoo hauvkub sulfuric acidthiab sib xyaw acid ib puag ncig.
Lub luag haujlwm tooj liab:Cu (1%) txhim kho kev tiv thaiv kom txo cov kua qaub, thaum N stabilizes cov qauv austenitic.
Tus nqi:Tus nqi hwm tus nqi vim yog nickel volatility, tab sis lifespan nyob rau hauv daim ntawv thov tseem ceeb justifies tus nqi.
4. Cov txheej txheem tsim khoom tseem ceeb yog dab tsi?
Teb:
Vuam:Use TIG/PAW withERNiCrMo-12 lossis ER3127muab tub lim. Limit interpass kub rau<100°C to avoid σ-phase.
Machining:Kev ua haujlwm siab- tus nqi hardening xav tau ceramic- cov cuab yeej coated thiab txo qhov nrawm.
Kev kho cua sov:Kev daws anneal ntawm 1150-1200℃tom qab quenching ceev kom optimize microstructure.
5. Qib no feem ntau siv qhov twg?
Teb:
Kev lag luam tshuaj:Reactors rau sulfuric / nitric acid sib tov thiab phosphoric acid ntau lawm.
Roj & Roj:Subsea umbilicals, qaub roj (H₂S/CO₂) piping.
Desalination:Siab -siab rov qab osmosis (RO) systems.
Pollution Control:Cov pa hluav taws kub hnyiab hauv cov thee- tua cov nroj tsuag.
