Hydrogen Cov ntsiab lus tswj hauv titanium yeeb nkab haum ua

Titanium yeeb nkab fittings yog cov khoom tseem ceeb rau kev thauj mus los ntawm cov dej thiab cov qauv kev sib txuas, thiab lawv cov kev ua tau zoo ncaj qha txiav txim siab txog kev nyab xeeb thiab ua haujlwm ntawm tag nrho cov khoom siv. Hydrogen cov ntsiab lus tswj yog ib qho kev nyuaj nyuaj hauv titanium yeeb nkab haum ua. Hydrogen embrittlement tshwm sim los ntawm hydrogen ntau dhau yuav txo qhov cuam tshuam rau lub zog, lub zog tensile thiab qaug zog lub neej ntawm cov khoom, uas yog qhov tseem ceeb zais kev phom sij txwv tsis pub muaj kev pabcuam txhim khu kev qha.titanium yeeb nkab fittings.

 

Cov titanium yeeb nkab chaw tsim tshuaj paus nyob rau hauv Suav teb

 

 

Hydrogen absorption yam ntxwv: Titanium muaj kev ua haujlwm siab thiab absorbs hydrogen sai thaum qhov kub siab tshaj 300 degree; hydrogen solubility txo qis nrog qhov txo qis ntawm qhov kub thiab txias.

 

Hydrogen embrittlement txaus ntshai: Ntau dhau hydrogen precipitates nyuaj thiab nkig TiH₂, ua rau muaj kev ntxhov siab thiab microcracks, ua rau hydrogen embrittlement puas; cov kab nrib pleb yog ncua, uas yuav ua rau muaj kev sib tsoo ntawm kev pabcuam.

 

Cov qauv txheem: Cov qauv dav dav yog Tsawg dua lossis sib npaug li 0.015% (150ppm); rau siab -kawg scenarios xws li aerospace thiab kev kho mob, nws yog tsawg dua los yog sib npaug rau 0.01%.

 

(I) Raw Material Pretreatment Theem

Raw khoom muaj kuab paug txaus ntshai: Titanium billets thiab vuam hlau yog nquag adsorb roj, noo noo thiab ntiv tes thaum khaws cia thiab thauj, thiab decomposition ntawm cov tshuaj no thaum ua thiab cua sov yuav tsim hydrogen uas nkag mus rau hauv cov khoom.

 

Pretreatment xav tau: Tshem cov roj nrog acetone los yog ethanol kiag li, thiab tshem tawm oxide nplai los ntawm kev sib tsoo los yog pickling; khaws cia rau hauv qhov chaw qhuav thiab inert tom qab ntxuav, thiab ua random tshuaj xyuas cov ntsiab lus hydrogen.

 

(II) Kev tsim thiab vuam txheej txheem

Kev tsim thiab vuam yog qhov txuas tseem ceeb rau kev qhia txog hydrogen hauv titanium yeeb nkab haum, thiab kev tiv thaiv thiab kev tswj hwm yuav tsum tau muaj los ntawm ntau qhov ntev xws li txheej txheem, ib puag ncig thiab cov cuab yeej:

 

Cov roj lubricants raug txwv rau hauv kev ua haujlwm txias, thiab cov khoom siv roj lossis cov roj tsis zoo yuav tsum tau siv los hloov; tswj qhov txias dov deformation, thiab ua intermediate annealing ntawm 600℃rau 1 teev yog tias tsim nyog los tshem tawm kev ntxhov siab thiab txhawb kev khiav tawm hydrogen.

 

High-purity argon gas nrog ib tug purity ntawm Greater los yog sib npaug zos rau 99.999% yuav tsum tau siv nyob rau hauv lub vuam txheej txheem los tiv thaiv lub molten pas dej ua ke, molten droplets thiab pem hauv ntej thiab nram qab sab ntawm lub siab - kub cheeb tsam; ntxuav cov vuam hlau thiab qhov 25 hli ntawm ob sab ntawm qhov zawj nrog acetone ua ntej vuam, thiab rov- ntxuav yog muab tso rau ntau tshaj 4 teev; Cov av noo ib puag ncig yuav tsum tsawg dua lossis sib npaug li 60%, thiab cov cuab yeej yuav tsum tau ua los ntawm titanium lossis stainless hlau.

 

(III) Kev kho cua sov theem

Lub hauv paus ntawm titanium yeeb nkab haum rau kev kho cua sov yog txhawm rau txhim kho cov khoom siv kho tshuab, thiab cov txheej txheem tsis raug yuav ua rau muaj qhov tsis zoo ntawm hydrogen nqus. Lub tshuab nqus tsev vacuum (Ntau dua lossis sib npaug ntawm 10⁻³Pa) lossis cov cua sov inert yog nyiam; Qhov kub qis (tsawg dua lossis sib npaug li 540 degree) ua rau muaj kev nqus hydrogen tsawg dua, thiab lub sijhawm cua sov yuav tsum luv luv ntawm qhov kub thiab txias.

 

Rau qhov chaw uas muaj cov ntsiab lus hydrogen ntau dhau, lub tshuab nqus tsev annealing dehydrogenation ntawm 700-800℃rau 2-4 teev yog siv los sib npaug hydrogen txo thiab kev tiv thaiv grain coarsening.

 

(IV) Kev Kho Hniav thiab Kev Tshaj Tawm -theem txheej txheem

Tom qab kev kho cua sov ntawm titanium yeeb nkab fittings, nkig oxygen- txheej yuav tsum tau muab tshem tawm (kom tiv thaiv kev tawg thiab hydrogen absorption), uas tuaj yeem ua tiav los ntawm machining, pickling lossis tshuaj sib tsoo. nruj me ntsis tswj cov kua qaub thiab lub sij hawm thaum pickling;

xaiv cov cuab yeej tshwj xeeb rau machining kom txo cov cua sov thiab tiv thaiv kev nqus hydrogen thib ob; ntxuav, qhuav thiab kaw cov khoom tom qab ua tiav.

 

 

Kev tshawb nrhiav cov ntsiab lus hydrogen ntawm titanium yeeb nkab fittings yuav tsum tau tus qauv thiab siab -precision: lub mainstream inert gas fusion method (0.5–200ug/g) ua raws li cov qauv ASTM/ISO/GB;

 

Sampling npog qhov tseem ceeb, cov qauv yog khaws cia inertly, cov hydrogen tso tawm los ntawm fusion yog thauj nrog argon rau kev kuaj pom, thiab kev kuaj dawb paug, calibrations thiab parallel txiav txim siab yog siv los xyuas kom meej.

 

Rau kev tsim khoom loj, laser hydrogen analyzers yog siv rau tsis yog - tiv tauj kev tshuaj ntsuam sai kom pom cov hydrogen faib rau saum npoo thiab ze rau - txheej txheej, txhim kho kev tswj kom zoo.

 

 

Qhov kev thov rau siab - cov cuab yeej kawg txhawb kev kho dua tshiab ntawm titanium yeeb nkab haum hydrogen tswj thev naus laus zis rau qhov tseeb, ua haujlwm tau zoo thiab tus nqi qis.

 

Lub tshuab hydrogenation hauv zos siv hlau hydride preforms raws li cov pa roj kom ua tau raws li kev tswj hwm hydrogen, txo cov nqi khoom siv thiab hloov mus rau cov yeeb nkab sib txuas;

 

Lub tshuab nqus tsev annealing-plasma composite dehydrogenation txheej txheem accelerates dehydrogenation thiab txo kev ua haujlwm poob;

qhov kev tshawb nrhiav ntse kaw- lub voj voog tuaj yeem paub qhov tseeb- lub sijhawm saib xyuas thiab kev hloov pauv tsis hloov pauv, zam qhov kev pheej hmoo ntawm hydrogen tshaj tus qauv los ntawm qhov chaw.

 

Ruihang Group, raws li cov kws tshaj lij, tshwj xeeb hauv kev tsim cov khoom siv titanium thiab titanium alloy. Peb muaj cov kab ntau lawm kom tswj tau qhov zoo ntawm cov khoom nruj me ntsis. Yog tias koj muaj lus nug, thov hu rau peb ntawm email:Sam.Rui@bjrh-titanium.com