Anodized Xov Ntsuas Txhuas Cov Ncaws Tawm Txhim Kho Cov Raj

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Cov Khoom Siv Tshuaj thiab Tshuaj Lom thiab Vuam Xaj ntawm Aluminium thiab Allolo Alloys

1. Ib qho yooj yim rau oxidize

Aluminium thiab oxygen muaj lub zog sib luag. Nyob rau ntawm chav tsev kub, qhov chaw aluminium tuaj yeem oxidized mus rau zaj duab xis tuab AL2O3 nrog cov tuab tuab txog 0.1 txog 0.2 m. Txawm hais tias txheej txheej ntawm alumina zaj duab xis no muaj zog dua, tuaj yeem tiv thaiv cov hlau txuas ntxiv mus rau oxidize, uas tau txais txiaj ntsig rau kev tiv thaiv ntuj tiv thaiv, tab sis nws coj teeb meem rau vuam, vim tias qhov chaw sib kis ntawm alumina (2050 degrees C) deb dhau ntawm lub ntsiab lus melting ntawm aluminium (txog 600 degrees C), qhov sib npaug yog li 1.4 npaug ntawm txhuas. Hauv cov txheej txheem welding, yuav cuam tshuam qhov kev fusion ntawm cov hlau, yooj yim rau daim ntawv slag, thiab alumina zaj duab xis kuj tshaj tawm cov dej ntau, vuam yuav ua rau lub weld tsim pores.

2. Loj dua thermal conductivity thiab lub peev xwm thermal

Lub thermal conductivity ntawm txhuas yog li plaub npaug ntawm cov hlau, yog li thaum vuam txhuas raj, nws noj ntau dua cua sov dua li cov yeeb nkab hlau vuam, thiab thiaj li yuav tau txais cov vuam sib txuas zoo, nws yog qhov yuav tsum tau siv lub qhov cua sov nrog cov muaj zog thiab siab zog.

3. Yooj yim rau tsim hydrogen qhov

Welding pores rau txhuas thiab aluminium alloys yog qhov tseem ceeb hydrogen qhov. Aluminium tuaj yeem nqus thiab yaj hydrogen hauv cov khoom loj hauv cov kua hauv lub xeev, kev solubility hauv lub xeev melting yog 0.0069 ml / g, thiab hauv lub siab kub solidification lub xeev yog 0.00036 ml / g, qhov sib txawv ntawm sab xub ntiag thiab nraub qaum yog ze li 20 zaug. Lub thermal conductivity ntawm txhuas yog loj heev, nyob rau hauv tib lub vuam txheej txheem, nws cov cua txias ceev yog 4 txog 7 npaug ntawm cov hlau, yog li cov hlau crystallization nrawm dua, vuam melting pas dej ua ke hauv cov txheej txheem txias txias, solubility ntawm hydrogen poob nrawm, nyob rau lub sijhawm no, ntau ntawm cov roj oversaturated, hydrogen tsis tuaj yeem ua kom zoo siab rau hauv hlau weld los ua pores. Yog li no, thaum vuam txhuas, lub weld muaj qhov sib txuam zoo los ua pores.

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