Yog vim li cas thiab tiv thaiv cov roj qhov hauv cov ntshiab Nickel (Nickel 200)

Kev huv huv ntawm vuamcov khoom siv nickel, puag hlau, thiab grooves muaj kev cuam tshuam zoo rau kev tsim cov vuam pores. Cov dej noo, roj stain, organic teeb meem, thiab oxide nyob rau saum npoo ntawm weldments thiab vuam hlau muaj xws li hydrogen, oxygen, thiab carbon. Nyob rau hauv cov xwm txheej ceev ceev, solidification, thiab crystallization, cov roj theem yuav tsim pores nyob rau hauv cov hlau weld ua ntej los nag. H2, O2, thiab CO2 muaj solubility siab nyob rau hauv cov kua ntshiab nickel, tab sis cov solubility txo qis heev thaum txias thiab solidification. Ntxiv mus, npib tsib xee yuav hnov ​​​​mob nrog oxygen los ua NiO ntawm qhov kub thiab txias. Thaum lub caij txias, nws yuav hnov ​​​​mob nrog hydrogen yaj hauv cov hlau los tsim cov dej vapor, thiab hnov ​​​​mob nrog carbon yaj hauv cov hlau los tsim cov pa roj carbon monoxide. Thaum lub sij hawm crystallization, cov pa roj no feem ntau tsis muaj sij hawm los khiav thiab tsim cov pores.

Hauv kev sib txuas ntawm cov ntaub ntawv npib tsib xee, cov hom pores tseem ceeb yog H2, CO, thiab H2O vapor pores. Lub oxidizing vuam cua ntawm cov npib tsib xee ntshiab yog ib qho yooj yim ua rau pores.

Txhawm rau kom tsis txhob muaj qhov hws, qhov vuam zawj thiab cov hlau nto nrog qhov dav ntawm 25 hli ntawm ob sab yuav tsum tau polished kom tshem tawm cov xim oxidation ua ntej vuam thiab ntxuav nrog acetone los yog ethanol kom tshem tawm cov roj, noo noo, organic teeb meem, thiab lwm yam av. High purity vuam cov ntaub ntawv yuav tsum tau siv nyob rau hauv vuam, thiab txaus deoxidizer yuav tsum tau ntxiv los tiv thaiv lub vuam pas dej ua ke thiab tag nrho deoxidize cov hlau nyob rau hauv lub pas dej ua ke. Yuav tsum muaj cov hlau nplaum txaus hauv TIG vuam hlau los tiv thaiv porosity.

Los ntawm cov kev soj ntsuam saum toj no, qhov vuam porosity yuav tsum tshwm sim los ntawm kev vuam tsis zoo thiab txoj kev vuam thaum lub sij hawm vuam txheej txheem. Yog li ntawd, cov qauv welded yuav tsum tau rov ua dua -welded thiab kho los ntawm cov nram qab no yam.

(1) Txo qhov vuam ceev kom tsim nyog thiab kho qhov vuam ceev mus rau 15-20 cm / min;

(2) Thaum lub sijhawm ua haujlwm vuam, lub vuam teeb tsis viav vias, thiab qhov luv luv arc vuam raug saws. Lub arc ntev yog tswj ntawm 1.0 - 1.5mm. Rau txhua ntu ntawm kev sib koom ua ke, ib feem me me tuaj yeem welded rov qab los pab txhawb cov pa tawm;

(3) Tom qab arc tawg, kev tiv thaiv argon tuaj yeem raug txiav tawm tsuas yog tom qab lub vuam pas dej ua kom txias tag.

Ntsuas qhov ntsuas qhov ntsuas

Tom qab cov txheej txheem tsim nyog xeem daim tiav lawm, lub vuam yog 100 feem pua ​​​​RT kuaj, tsis pom qhov pore tsis xws luag, thiab cov khoom siv kho tshuab kuj ua tau raws li tus qauv. Tom qab cov khoom yog welded los ntawm cov txheej txheem saum toj no, cov khoom zoo siab ua tau raws li cov txheej txheem ntawm kev kos duab.

Thaum vuamNickel ntshiab (Nickel 200), nws yog ib qho tsim nyog yuav tsum xaiv cov khoom siv vuam zoo sib xws nrog lub hauv paus hlau, thiab tsim cov txheej txheem vuam tsim nyog nyob rau hauv nruj raws li cov khoom yam ntxwv ntawm kev tsim thermal tawg, txo qhov pores thiab tiv thaiv coarse nplej. Kev xaiv cov khoom siv vuam thiab cov txheej txheem tsis tseem ceeb heev.