Thaum vuamtitanium tubesthiab titanium alloy raj, thaum cov ntsiab lus ntawm oxygen thiab nitrogen nyob rau hauv lub vuam yog siab, qhov kev ua tau zoo ntawm lub vuam los yog tshav kub-cuam tshuam cheeb tsam yuav nkig. Titanium pib nqus hydrogen ntawm 250 degrees, oxygen los ntawm 400 degrees, thiab oxygen los ntawm 600 degrees. Qhov kub pib nqus nitrogen, thiab huab cua muaj ntau cov nitrogen thiab oxygen. Nyob rau hauv qhov kev txiav txim ntawm cov vuam loj, cov kab nrib pleb txias yuav tshwm. Nws yog tus cwj pwm los ntawm cov kab nrib pleb tshwm sim ob peb teev lossis ntev dua tom qab vuam, uas yog hu ua ncua kev tawg. Cov kev tshawb fawb tau pom tias qhov diffusion ntawm hydrogen thaum lub sij hawm vuam yog lub ntsiab ua rau xws li tawg. Thaum lub sij hawm welding txheej txheem, hydrogen diffuses los ntawm high-temperature sib sib zog nqus pas dej ua ke mus rau lub qis-kub kub-kub cheeb tsam. Qhov nce ntawm cov ntsiab lus hydrogen nce tus nqi ntawm TiH2 precipitated nyob rau hauv cheeb tsam no, uas ua rau kom lub brittleness ntawm tshav kub-cuam tshuam cheeb tsam. Tsis tas li ntawd, vim lub ntim nthuav dav ntawm hydride nag lossis daus, cov ntaub so ntswg loj yog tshwm sim, ua ke nrog kev nthuav dav thiab sib sau ua ke ntawm hydrogen atoms mus rau qhov siab-kev ntxhov siab hauv cheeb tsam, uas ua rau cov kab nrib pleb. Txoj hauv kev tseem ceeb los tiv thaiv cov kab nrib pleb zoo li no yog txhawm rau txo qhov chaw ntawm hydrogen hauv cov pob qij txha welded.
Thaum vuamtitanium yeeb nkab manufacturers, porosity yog ib qho teeb meem loj uas feem ntau ntsib. Lub hauv paus ua rau ntawm qhov tsim ntawm pores yog tshwm sim los ntawm kev cuam tshuam ntawm hydrogen. Cov txheej txheem tseem ceeb los tiv thaiv kev tsim cov pores yog:
1) Vuam nyob rau hauv kev tiv thaiv ntawm high-purity argon roj, purity ntawm argon roj yuav tsum tsis txhob qis dua 99.99 feem pua.
2) Ua tib zoo tshem tawm cov khoom siv organic xws li oxide daim tawv nqaij thiab cov roj stains ntawm qhov chaw ntawm titanium raj, titanium phaj, thiab titanium phaj raj qhov muag. Muaj peev xwm ntxuav tau los ntawm kev siv tshuaj thiab tshuab
3) Siv cov roj tiv thaiv zoo rau lub pas dej molten, thiab tswj qhov ntws thiab ntws ntawm cov roj argon los tiv thaiv kev kub ntxhov thiab cuam tshuam rau kev tiv thaiv.
4) Xaiv cov txheej txheem vuam tsim nyog thiab cov txheej txheem titanium raj, ua kom lub sijhawm nyob hauv lub pas dej sib sib zog nqus, thiab siv nws los pab txhawb kev khiav tawm ntawm huab cua npuas, uas tuaj yeem txo qhov pores.
