1. Cov Khoom Siv Hluav Taws Xob thiab cov khoom tseem ceeb
Q1: Dab tsi yog alloy tsim lub tswv yim thiab cov ntsiab lus kev ua tau zoo ntawm 9850 steel yeeb nkab?
A1:
ASTM A 519 9850 yog ib qho ultra- chromium {}}}} vanadium alloy hlau yeeb nkab. Nws muaj pes tsawg leeg (0.48-0.53% C, 1.80-2.20% MO, 0.10-0.15% v) muaj peb lub chaw ua haujlwm:
Lub zog -} Cov zog tsis muaj zog tshaj lossis sib npaug nrog 1250 MPa kev sib npaug ntawm kev ntsuas
Extreme environmental stability: High-temperature strength retention >80% ntawm 600 degree, hydrogen sulfide kev nyuaj siab corrosion throadosion lossis sib npaug ntawm 90% smys;
Ultra - Tus pos loj -}}}}}}} ectness fluctible tsawg dua los yog sib npaug rau 2 hrc rau ib feem ntawm 300mm tuab seem. Cov Kev Siv Raug:
Tiam ol nuclear fais fab nroj tsuag reactor siab rau cov ntshauv saum ntuj bolts;
Tob qhov chaw sojntsuam tsaws ob txhais ceg;
Ultra - tob tob (loj dua los yog sib npaug rau 9,000 m) tho cov pob qij txha.
Ii. Kev ua tau zoo nrog cov khoom siv sib tw
Q2: Yuav ua li cas xaiv ntawm 9850 thiab txiav - ntug cov ntaub ntawv xws li AISI 4340M thiab HYTUF- x?
A2:
Kev sib xyaw sib txawv:
9850: Ib nrab xee hloov chaw los ntawm vanadium / molybdenum composite microalloying (15% tus nqi qis dua 4340m);
Hytuf - X: muaj 1.5% npib los txhim kho kev tawv tawv, tab sis yuav tsum muaj kev cia siab rau cov hlau txawv teb chaws.
Kev Ua Tau Marints:
Pob zeb nyuaj ntse: 9850 (Kic ntau dua lossis sib npaug ntawm 140 mpaologym) ≈ hyrtuf {}} x> 4340m;
Hydrogen embrittlement: 9850 (Hei tsawg dua lossis sib npaug nrog 5%) III. Tag nrho - txheej txheem tsim tshuab sib nraus technology
Q3: Dab tsi hauv kev nrhav yuav pom nyob rau hauv smelting thiab ua ntawm 9850 cov kav hlau steel los ntawm 2025?
A3:
Metallurgical Theem:
Ntshav arc thim rov qab (par) kev tswj thev naus laus zis [O] tsawg dua lossis sib npaug nrog 5ppm thiab [n] tsawg dua los yog sib npaug rau 30ppm;
Nruam casting hauv qab electromagnetic muag siab (Central cais tsawg dua los yog sib npaug rau C0.5).
Kub Ua Theem:
Ultrafine nplej yob (grain loj tsawg dua los yog sib npaug rau 3μm);
Laser - pab sov ncaj ncaj (deformation tswj ± 0.01mm / m).
Kev Kho Cua Sov:
Pulsed sib nqus teb quenching (txias tus nqi tswj tau ntawm 200-500℃/ s);
Ai -} Raws li tempering parameter (hardness predication yuam kev ± 0.5hrc).
IV. Kev tiv thaiv tsis ua haujlwm nyob rau hauv cov xwm txheej huab
Q4: Yuav ua li cas 9850 tus kheej steel yeeb tiv thaiv kev tiv thaiv rwbiation embrittlement nyob rau hauv nuclear reactors?
A4:
Kev ua haujlwm Automatic:
Fast neutron irradiation (>1 × 10¹⁹ n / cm²) ua rau kev tsub zuj zuj ntawm kev tsis xws luag. Khoom -} Kev Tiv Thaiv Qib:
Ntxiv 0.06% TI cov npe Nano -}} qhov chaw muaj suab paj tawg ntawm cov ntxiab;
Intercritical annealing (750 Qib X 2H) Tom qab tswj dov cov kev ua kom zoo cov hmoov nplej.
Engineering -} Kev tiv thaiv qib:
Nto tus kheej -} kho cov txheej ceramic (cov ntaub ntawv sio₂ ntsaws ruaj ruaj);
MEMS - Raws li tiag- lub sij hawm hluav taws xob puas tsuaj soj ntsuam system.
V. Cov qauv thiab muab cov khoom siv saw hlau sib txuas
Q5: Cov xwm txheej tshiab tau nce qib tshiab thiab kev hloov chaw hauv lub nroog rau 9850 tus yeeb nkab steel?
A5:
Qauv Tshiab:
ASME Code Case N-897 (2025) Ntxiv hluav taws xob ntsuas hluav taws xob rau 9850 tus hlau;
ISO 4990 {{- 2025 Cov npe 9850 raws li cov khoom siv uas nyiam tshaj plaws rau kev sib sib zog nqus-ntiaj teb engineering.
Kev tawg hauv tsev:
Tuam Tshoj tus pab pawg ib pawg tau ua tiav ntau lawm ntawm 600 hli loj {1} cov yeeb nkab loj tshaj plaws 9850 tus ntawv pov thawj steel (API 6A);
Tus nqi yog 20% qis dua tib qho kev qhia tshwj xeeb hauv Tebchaws Meskas, nrog cov sijhawm coj mus rau 30 hnub.
