I. Cov Khoom Siv Xwm thiab Cov Khoom Tseem Ceeb
Q1: Dab tsi yog cov qauv tsim qauv logic thiab cov kev ua haujlwm tseem ceeb ntawm 8735 steel yeeb nkab ntawm 8735 steel yeeb nkab?
A1:
Raws li nruab nrab - carbon nickel {} chromium alsoy {}} mo {}} MO) txiav txim siab:
Lub zog -} kev sib npaug ntawm cov nickel thiab chromium, cov yeeb nkab tswj hwm lub zog loj dua lossis sib npaug nrog 930 MPa.
Heev tawv: Qhov tseem ceeb Inch (roj quenching) tuaj yeem ncav cuag 120 hli, ua rau nws haum rau loj- ntu ntu.
Optimized Latigue Kev Ua Phem: Vanadium Microalloying (0.05- 0.10%) Ntau txhim kho lub neej khiav rog siab.
Cov ntawv thov raug: kev ua haujlwm heev xws li lub rotor rotor shaft thiab hydraulic li hydraulic-} hiav txwv drilling platform cranes. Ii. Kev ua tau zoo nrog cov khoom siv sib tw
Q2: Dab tsi yog qhov sib txawv tseem ceeb ntawm 8735 thiab lwm cov qib STUP xws li 4340 thiab 8740?
A2:
Compostert Spectral ntsuam xyuas:
8735 muaj cov ntsiab lus npib tsib xee (1.65-2.00%) piv rau 4340, tab sis cov ntsiab lus me me (0.35% vs {% nyob rau hauv 4340) thiab ib nyuag molybdenum.
Piv rau 8740, 8735 txhim kho kev coj dawb huv los ntawm kev txwv cov kab lus thiab phosphorus cov ntsiab lus (tsawg dua los yog sib npaug rau 0.015%).
Kev sib piv kev sib piv:
Pob zeb nyuaj ntse: 8735 ≈ 4340> 8740 (vim yog cov ntsiab lus tsis zoo xws li Nickel cov ntsiab lus thiab kev coj dawb huv siab dua);
Weldability: 8735 Outperforms 4340 (cov pa roj carbon ntau dua 0.05 qis dua);
Tus nqi rhiab: 8740 <8735 <4340.
III. Niaj hnub evolution ntawm kev kho cua sov
Q3: Cov kev sib txuas txuj ci thev naus laus zis yuav pom cov txheej txheem ntawm cov kev kho cua sov Mainstream hauv 2025?
A3:
Txheej Txheem Yooj Yim:
Austenitizing: 845-870 DEGRE X 1H / 25 hli (yuav tsum muaj Argon tiv thaiv kom tiv thaiv Decarburization);
Quenching: Siv cov tshuaj polymer aqueous (txias tus nqi tswj ntawm 80-100℃/ s);
Tempering: Two-stage tempering (first 260℃x 2h for stress relief, then 540℃x 4h for microstructure stabilization).
Cov Technology Technologies Technologies:
Laser -} Pab tau kev kho cua sov (kho kom meej ntawm cov nplaim hluav taws xob gradieve);
Ai {- Raws li twv ua ntej ntawm kev txwv tsis pub (yuam kev<±3 HRC).
IV. Puv lub neej zoo tswj
Q4: Dab tsi yog qhov tseem ceeb tswj cov lag luam rau 8735 steel kav, los ntawm smelting rau cov khoom tiav?
A4:
Smelting theem:
Nqus plua plav ([h] tsawg dua los yog sib npaug rau 1ppm, [O] tsawg dua lossis sib npaug rau 15ppm);
ESR (electroslag reacelting) (equiaxed grain piv ntau dua lossis sib npaug rau 90%). Ua theem:
Kev Kuaj Online Tom qab Kub Rolling (rhiab heev φ0.8mm ca -} hauv qab qhov);
Sib nqus partle kuaj tom qab ntxhib machining (ASTM E1444 txuj ci).
Qhia tseeb:
3D X - duab ci kev ntxhov siab kev ntxhov siab (kev ntxhov siab ntau tshaj lossis sib npaug nrog 300 MPa);
Hydrogen -}} Ua rau kev sim ua kom muaj kev ntsuas kev ua haujlwm zoo (nace TM0284-2025).
V. Kev Ua Haujlwm Kev Ua Haujlwm Engineering Kev Ntsuam Xyuas
Q5: Yuav ua li cas tiv thaiv kev ntxhov siab corrosion ntawm 8735 steel yeeb nkab hauv dav hlau tsaws iav thov?
A5:
Kev ua haujlwm Automatic:
Chloride ib puag ncig + residual tensile kev ntxhov siab → intergranular corrosion breatititioniation.
Kev daws:
Nto Kho: Tsawg {{- mion Plasma Txau Al ... 1}}} mg Txheej (porosity<1%);
Kev nyuaj siab txog kev ua kom tau zoo: Kev siv kev laus heev (txo qis kev ntxhov siab los ntawm ntau dua 40%);
Nrhiav kom tau txais kev txhim kho: nonlinear ultrasonic nrhiav tau ntawm thaum ntxov- theem micrmacks (rhiab 0.1mm).
2025 Kev Tsim Kho:
Self -} kho microcapsule txheej thev naus laus zis (cia li tawm tsam corrosion inhibitors ntawm cov kab nrib pleb).
