1. Dab tsi yog cov khoom siv uas muaj zog thiab cov tseem ceeb muab tso rau ntawm 8640 steel yeeb nkab?
Teb:
ASTM A 519 8640} Puas muaj siab {1} {} chromium {}} molybdenum alloy hlau. Nws muaj pes tsawg leeg (0.38-0.43% carbon, 0.70-0.70.70% npib tsib, 0.20-0.30% molybdenum) muaj peb cov ntsiab lus:
Lub zog - kev kub ntxhov rau kev sib cav sib ceg thiab muaj kev cuam tshuam nrog kev sib cav sib ceg ntau dua lossis muaj kev sib luag.
Cov ntsiab lus hnyav heev: Vim nws cov ntsiab lus Chromium ntau ntxiv, 50 hli (50% siab dua}), ua rau nws haum rau qhov chaw loj.
Cov txheej txheem hloov tau: nws txuas lub peev xwm carburizing (nto hardness hrc 60+ sib npaug CEQ ≈ ≈), cov kev sib ntsib ntau yam), kev sib ntsib ntau yam kev thov.
2. Yuav ua li cas tuaj yeem kho txheej txheem cua sov ntawm 8640 yuav ua kom zoo thiab ua kom zoo dua qub? A: Cov qauv tsim txawv yog xav tau raws li daim ntawv thov cov xwm txheej:
Ultra - defings loj thiab, marine cranksafts):
Siv cov sib txawv kub quenching (920℃deg / 860}}}℃cov tub ntxhais kawm cua txias) kom txo qis distortion;
Hnav {{0 {}} thiab corrosion -} Cov Cheebtsam Tsis kam:
Plasma Cladding (Cr- mo} mo} mo cladging, ua tiav rau qhov chaw hnyav ntawm HV 1200 thiab kev tawm tsam rau dej hiav txwv corrosion;
Weld Kho Chaw:
Laser Cladding + Induction Annealing (ib txhij tswj cov lus tawm thaum tshav kub kub tsawg dua los yog sib npaug rau kev ua kom sov siab rau hauv tshav kub}}}}} cuam tshuam cheeb tsam.
3. Nyob rau hauv uas txiav - ntug teb yog 8640 irreplaceable?
A:
Tob -} Hiav txwv engineering:
Tag nrho -} Hiav txwv - qhov tob manipulator pob qij txha (700
Cov Khoom Siv Zog Hluav Taws Xob:
Kua Hlau Ua Kua Hlau Reve Shafts (600 Degree Lead- bismuth distance);
High -}}} end endorsing:
Tsib {- Axis Tshuab Tool Spindles (Dynamic Radial Runial tsawg dua los yog sib npaug rau 1 μm);
Kev tiv thaiv tub rog thiab tub rog:
Electromagnetic rab phom txhawb nqa (tiv taus kev kub siab - kub ablation + muaj zog electromagnetic cuam tshuam).
4. Dab tsi yog qhov kev ua tau zoo faib cov khoom siv piv rau cov ntaub ntawv xws li 8630 / 4340?
Teb:
vs . 8630:
Vim nws cov pa roj carbon ntau dua / chromium cov ntsiab lus, {{}}}}}}} Txoj kev ua kom muaj zog ntxiv rau kev siv VUAM (300 tawm VS {}}} degree).
vs . 4340:
4340 Cov ntsiab lus Nickel zoo tshaj (1.65-} Cov khoom siv qis ({}} 60}}
5. Dab tsi yog cov tseem ceeb tshaj cov tseem ceeb rau lub neej ua haujlwm zoo?
Teb:
Metallurgical Theem:
ESR eltroslag kev zam txim yuav tsum tau siv, nrog [s] tsawg dua lossis sib npaug nrog 0.008% thiab [p] tsawg dua los yog 0.012%;
Lub pob txha me qhia morphology (100% fibrous bacture) yog qhov yuav tsum tau;
Machining theem:
Rau kev nyuaj tig (hrc 35 -}}}}}}}}}}}}}}}}}}}}}}}}}} 40), thaum lawv txo cov rog li 25%;
Lub qhov sib sib zog nqus lub tshuab luam ntawv yuav tsum muaj phom drilling nrog high - zaus 50μm) kom tsis txhob muaj kev sib tw;
Kev Ntsuam Xyuas Kev Pabcuam:
Barlitrausen lub suab kuaj (txhawm rau ntsuam xyuas microstress) yog ua txhua 2000 teev;
Hydrogen cuab cov txheej txheej (TIC + Mos ₂₂₂ sib xyaw ua ke) yog qhov yuav tsum tau ua haujlwm rau cov haujlwm ua haujlwm hauv hydrogen ib puag ncig.
