Quid facit in degassing effectus calor curatio lance sub vacuo afficit qualis est workpiece?

In summus finem vestibulum, vacuo calor curatio technology est late in aerospace, medicinae apparatu et praecisione instrumenta ex eius characteres non oxidatio, humilis deformatio et precise temperatus imperium. Tamen, saepe neglecti link in hoc processum - in degassing effectus (outgassing) de Calor Treatment Tray - fiat in "invisibilia interfectorem" de workpiece qualitas.
I. mechanism et fons degassing effectus
In a vacuum environment, gas molecules (such as H₂O, O₂, CO₂, etc.) adsorbed on the surface of the heat treatment tray and the workpiece, as well as gases dissolved in the material (such as H₂, N₂) will be rapidly released due to high temperature and low pressure conditions. Hoc processus dicitur "degassing." In particulari, cum densitas in lance (ut graphite, immaculatam ferro vel Ceramic) est insufficiens vel preteratment est insufficiens, in componit, in degassing effectus. Exempli gratia, cum graphite lance est supra DC ° C, Rate de sulphuris potest pervenire 10 ^ PA · MW / s, significantly polluat in vacuo environment.
II. Negative impulsum degassing effectus in workpiece species
Superficiem contaminationem et oxidatio
In Gas moleculis dimisit a degassing et agere cum superficies in workpiece. Exempli gratia, cum oxygeni partialis pressura excedit 10 ^ PA, a fragilis cadmiae layer (tio₂) et formare super superficiem Titanium mixe, unde in decremento in lassitudine vitae magis quam XXX%; Aqua vapor ut faciam "hydrogenii Embrstlement" de High Carbon ferro, causing miROCROGS.
Inaequalis calor translationem
Vestibulum residuum redigendum est uniformitatem vacuum environment, unde in decrementum in scelerisque radialis efficientiam inter lance et workpiece. Experimentalem notitia ostendere quod cum vacuo gradu guttae ex 10⁻⁻ PA ad 10⁻c PA, in calefactio rate deviationem de Aluminium Alloy Workpiece potest pervenire XV%, causando loci overheating vel underburning.
Deterioracionem materiae proprietatibus
Per degassing processus, clavis elementa quidam Alloys (ut Magnesium et cadmiae) potest amissa propter gasification. Aviation Aluminium Alloy (VII) LXXV sicut in exemplum, pro omnibus 0.1% augmentum in damnum rate of magnesii, eius tensile vires et decrescit circiter L MPa.
III. Optimization belli: collaborative emendationem ex materiae ad processibus
Pallet materia upgrade
Eligendo low Outgassing rate materiae, ut eget vapor depositione (CVD) Silicon Carbide iactaret Graphite, potest redigendum sulphur release ad 10⁻⁷ PA · MW / s. Ceramic-fundatur compositorum (ut alno₃-sic) et humilis abamini et excelsum scelerisque conductivity.
Pretreatment Processus innovation
Preking pre-Tray (DCCC ℃, X horis de vacuo annealing) potest removere quam XC% ad adsorbed Gas. NASA investigationis ostendit quod ad Gas dimittis de pretreated immaculatam ferro in vacuo fornacem reducitur per LXXVI%.
Dynamic Vacuum Imperium Technology
Per calefactio scaena, a mocecular sentinam et cryogenic pump sunt ad stabiliendum vacuo gradu infra 10⁻⁴ PA; Per refrigerationem scaena, summus puritas Argon Gas (puritate 99,999%) est introducta efficaciter inhibere secundarium oxidatio.