1. EN 10297 X6CrNiMoNb17-12-2 yog dab tsi?
Teb:
EN 10297 X6CrNiMoNb17-12-2 yog ibniobium (Nb) -stabilized austenitic stainless hlau seamless rajRaws li European tus qauv EN 10297. Nws yog qhov sib txawv ntawm 316Nb (zoo ib yam li AISI 316Ti tab sis nrog Nb es tsis txhob Ti), optimized rau siab - kub stability thiab weldability.
Lub ntsiab lus tseem ceeb:17% Cr, 12% Ni, 2% Mo, thiab niobium (Nb) Ntau dua lossis sib npaug rau 10 × C cov ntsiab lus los tiv thaiv kev nkag siab.
Qib sib npaug:UNS S31640, DIN 1.4576.
Feature tseem ceeb:Superior tsis kam mus rau intergranular corrosion thiab creep ntawm siab kub.
2. Cov khoom siv tshuab yog dab tsi?
Teb (kev kho mob annealed):
Tensile zog:500-700 MPa
Yield zog (0.2% offset):Ntau tshaj lossis sib npaug li 200 MPa
Elongation:Ntau dua lossis sib npaug li 40%
Hardness:Tsawg dua lossis sib npaug li 215 HB
Nco tseg:Nb stabilization txhim kho siab - qhov kub thiab txias thiab txo cov nag lossis daus carbide.
3. Nws piv li Ti- cov qhab nia ruaj khov (xws li X6CrNiMoTi17-12-2) li cas?
Teb:
Stabilization Mechanism:Nb (niobium) muaj qhov zoo siab -kub stability dua Ti (titanium), ua rau nws haum raucreep- daim ntawv thov tiv taus(piv txwv li, fais fab nroj tsuag).
Weldability:Ob qib tiv thaiv rhiab heev, tab sis Nb-stabilized steel tej zaum yuav muaj tsawg dua kev suav nrog thaum vuam.
Tus nqi:Nb- cov qhab nia ruaj khov feem ntau kim dua vim niobium tus nqi lag luam siab dua.
4. Cov txheej txheem tsim khoom tseem ceeb yog dab tsi?
Teb:
Vuam:Siv cov khoom siv hlau sib txuam (xws li ER316Nb). Tsis muaj kev tshaj tawm -welding cua sov yuav tsum tau siv rau feem ntau daim ntawv thov.
Machining:Nb carbides nce cov cuab yeej hnav; siv cov cuab yeej carbide thiab nruab nrab txiav ceev.
Kev kho cua sov:Kev daws annealing ntawm 1050-1100℃ua raws li cov cua txias kom ua kom zoo dua corrosion.
5. Qib no feem ntau siv nyob qhov twg?
Teb:
Kev tsim hluav taws xob:Boiler tubes, superheaters (resist creep ntawm 500-800 degree).
Kev lag luam tshuaj:Reactors thiab piping rau corrosive media (piv txwv li, phosphoric acid).
Roj & Roj:Cov khoom siv downhole hauv qhov chaw qaub (tiv thaiv H₂S-induced cracking).
Aerospace:Exhaust Cheebtsam thiab siab -stress fittings.
