1. Pib
Raws li lub ntiaj teb hloov mus rau lub zog huv, Hydrogen tau tshwm sim raws li ib qho kev siv hluav taws xob ntau, siv cov txheej txheem roj can, thiab faib cov cim.Li qub, tseem ceeb rau kev tswj hwm hydrogen ntws thiab siab, ntsej muag cim cov khoom sib tw vim yog cov khoom siv hydrogen cov khoom, nroghydrogen embrittlement (nws)ua qhov hnyav tshaj plaws.
Nws hais txog qhov kev ua kom muaj kev cuam tshuam ntawm cov khoom siv cov tshuab khoom siv (piv txwv li, kev nqus me me) vim yog hydrogen nqus, ua rau brittle uncittures hauv qib kev ntxhov siabHauv qab no cov txiaj ntsig lub zogCov. Chaw hais nws yog pivotal rau kev nce qib hydrogen valve technology thiab kom muaj kev nyab xeeb system.
2. Hydrogenlement: Mechanisms & Hom
(1) hydrogen qhov chaw
- Nyob hauv: Qhia thaum lub sijhawm tsim khoom (piv txwv li, melting, vuam).
- Nraum: Los ntawm kev ua haujlwm ib puag ncig (piv txwv li, siab h₂, kua qaub yog).
(2) nws hom
- Hydrogen Attack: At high temps/pressures (e.g., >200°C, >10MPA), h₂ reacts nrog carbon hauv steel nyob rau hauv steel, sib sau methane npuas → tawg.
- Flaking ("Dawb me ntsis"): Hydrogen precipitates raws li voids nyob rau hauv cov loj zam txim thaum txias, ua rau brittle me me.
- Hydrogen-induced ncua kev tawg: Kev ntxhov siab lees paub h atoms, ua rau kev ua tsis tiav tom qab lub sijhawm ntev.
(3) cuam tshuam cov yam ntxwv
- Khoom Siv Khoom: High-zog steels \/ titanium alloys yog kis tau zoo; Aluminium \/ tooj liab Alloys tawm tsam nws zoo dua.
- H₂ concentration: H₂ qib siab dua sawv cev.
- Kev ntxhov siab lub xeev: Tensile kev ntxhov siab ua kom nrawm dua h diffusion; compressive ntxhov siab inhibits nws.
3. Cov khoom sib tw hauv Hydrogen Valve R & D
(1) hydrogen permeration
- H₂ cov me me molecular loj muab cov hlau me me los ntawm cov hlau me (piv txwv li, 1000 nrawm dua li o₂ hauv cov hlau hlau).
- Cov kev daws teeb meem: Ceramic txheej (piv txwv li, al₂o₃, zro₂) lossis PVD \/ CVD hlau me me los thaiv permeration.
(2) Kev Xav Tau Siab Siab
- Li qub yuav tsum withstand35-70MPAhauv hydrogen cia \/ thauj khoom.
- Qhov tseem ceeb yuav tsum muaj: High paib lub zog, kev nruj heev, thiab qaug zog tsis kam.
- Cov Ntaub Ntawv Tam Sim No: Cov hlau chromium-molybdenum hlau (nquag rau nws); R & D tsom rau NI \/ V aloying thiab kub iSostatic nias (hip) kom ua kom phefub tsim microstructure.
(3) qhov ntsuas kub
- Cryogenic mob(piv txwv li, {-253 degree rau cov kua h₂): Austenitic Stainless hlau \/ Aluminium alloys khaws cov dovility.
- Kev Kub Siab (e.g., >200 degree): Nickel \/ Cobalt-based alloys tiv taus nkag \/ oxidation.
- Kev caij tsheb kauj vab thermal: SHACP HLOOV HLOOV HLOOV (piv txwv li, cov chaw khiav roj) thov cov ntaub ntawv nrog nkees heev ua tsaug.
(4) cov ntawv teev npe tshwj xeeb
- Cov chaw sam roj: Cov ntaub ntawv yuav tsum ua kom muaj kev pheej hmoo h his yaig, siab viav vias, thiab hnav (piv txwv li, tungsten carbide ntsaws ruaj ruaj).
- Roj Hlawv: Compatibility nrog Acidic electrolytes (piv txwv li, 316L stainless hlau, titanium) thiab kev zam kev ntawm galvanic corrosion.
4. R & D Bottencks & Ntsiab
(1) Advanced tsim cov nyom
- Hmoov metallurgy: Yuav tsum muaj cov hmoov av ultra ntshiab kom tsis txhob muaj qhov tsis xws luag.
- Kev Luam Ntawv 3D: Txheej cov khoom siv adhesion thiab muaj kev nyuaj siab rau kev ntseeg siab; Kev ua haujlwm tom qab (piv txwv li, lub ntsag) yog kim.
(2) tus nqi-ua lag luam kev lag luam tawm
- Kev ua haujlwm siab alloys (piv txwv li, inconel, ti alloys) yog kim.
- Lub tswv yim: Cov kev kho deg (piv txwv li, nitriving) los txhim kho cov hlau tsawg tus nqi; Cov nplai-nce los txo cov nqi.
5. Kev Tiv Thaiv & Mitigation
- Cov khoom siv xaiv: Tsawg-lub zog \/ cov kev ua kom muaj zog heev rau ib puag ncig kev nplua nuj.
- Sab-Engineering: Txheej txheem (piv txwv li, electroless ni-p) los thaiv h atress.
- Txheej Txheem Tswj: Tsawg-h₂ vuam, post-weld dehydrogenation.
- Kev tswj hwm ib puag ncig: Qhuav h₂ muab, corrosion inhibitors.
Kov yeej nws thiab cov khoom muajmultidisciplined inventation-From Alloy Tsim rau Advanced tsim. Raws li hydrogen infrastructure nthuav dav, valve cov khoom yuav tsum sib npaugKev Nyab Xeeb, Kev Ua Haujlwm, thiab Tus NqiYuav kom pab tau ib lub zog ua kom muaj zog.
Los ntawm diana
