Txoj Kev Siv Tshuaj Stainless Steel Fabrication (4)
1.4 Kev xaiv ntawm txoj kev kho mob
Yam twg yog siv rau cov kev kho qhov chaw ntawm cov hlau tsis muaj steel, raws li cov khoom qauv, cov khoom, thiab cov kev cai sib txawv ntawm qhov chaw.
2 Ntau yam ua rau ntawm kev sib tsoo hauv steel hlau fabrication qhov chaw
2.1 Cov txhuam tshuaj lom neeg
2.1.1 Cov dej paug: hmoov av, kua qaub, acid, alkali, ntsev, txuas mus rau ntawm cov hlau tsis muaj steel hlau ua hauj lwm los ntawm kev hloov corrosive hauv qee yam, thiab chemically react nrog tej yam hauv cov hlau tsis huv ua kev xeb thiab xeb.
2.1.2 Kos rau saum npoo: kev puas tsuaj rau cov duab kos los ntawm ntau yam khawb, yog li ntawd qhov kev tiv thaiv kev muaj peev xwm ntawm cov hlau tsis muaj zog yog qis, thiab nws yog ib qho yooj yim kom hnov mob nrog cov tshuaj nruab nrab los ua tshuaj lom neeg muaj zog thiab xeb.
2.1.3 Tu qab: Tom qab ntxuav thiab ua kom huv, kev ntxuav tu tsis huv, tawm cov kua residual, ncaj qha ua rau corroding ntawm stainless steel fabrication qhov chaw (tshuaj khib nyiab)
2.2 Electrochemical corrosion
2.2.1 Carbon hlau cov pa phem: Cov khawb thiab cov xov xwm corrosive los ntawm kev sib chwv nrog cov hlau qhov chaw thiab tom qab daim ntawv thaiv cov hlab ntsha thiab ua rau hluav taws xob hluav taws xob.
2.2.2 Txiav: kev nplaum thiab kev qias neeg ntawm cov xeb uas muaj xeb xws li qhev thiab txiab ua ib qho roj teeb ua ntej los tsim cov tshuab ua hluav taws xob.
2.2.3 Thaum tshav kub kub kho: Cov khoom siv hauv qhov cub muaj qhov hloov thiab cov qauv metallographic tsis sib xws, thiab cov roj teeb ua thawj tsim nrog lub qhov dej txhuam ua kom ua rau hluav taws xob hluav taws xob.
2.2.4 Vuam: Lub cev tsis ua hauj lwm (tawg, stomata, tawg, tsis siv, tsis muaj txhij, thiab lwm yam) thiab cov tshuaj tsis haum (cov noob qoob, cov ciam teb, cov ciam av, thiab lwm yam).
2.2.5 Cov khoom siv: Cov hlau tsis muaj pa taws ua tsis xws luag (cov khoom tsis sib xws, S, P impurities, thiab lwm yam) thiab cov teeb meem ntawm lub cev (xoob, xuab zeb, tawg, thiab lwm yam) yog qhov tsim kom muaj cov kab mob hauv galvanic nrog cov xov xwm corrosive los ua electrochemical tawg.
2.2.6 Kev Sau Npe: Cov kua qaub los ntawm cov kua qaub; Passivation cov nyhuv tsis zoo, ua rau tsis sib txig los sis thin passage zaj duab xis ntawm cov nplaum ntawm cov hlau tsis ntxhib, uas yog ib qho yooj yim rau cov hluav taws xob hluav taws xob.
2.2.7 Kev Ntxuav: Cov seem ntawm cov kua qaub los ntawm cov kua qaub thiab cov khoom siv corrosed ntawm cov kav hlau tsis muaj cav ua hluav taws xob ua hluav taws xob nrog cov xim tsis xeb hlau.
2.3 Kev nyuab siab concentration yog nws qhov kev nyuaj siab ntxhov plawv.
Hauv ntej, vim nws cov metallographic qauv thiab qhov chaw hauv cov kos poom kos, cov hlau tsis muaj hnyav feem ntau nyuaj rau cov khoom siv tshuaj tua kab mob ua rau lub cev tsis muaj zog, tab sis nws tsis tuaj yeem ua kom qis dua txhua lub sijhawm. Nyob rau hauv muaj cov kev tawm dag zog thiab kev txhawb zog (xws li khawb, txaws, slag, thiab lwm yam.), Stainless hlau kuj tau corroded los qeeb tshuaj lom neeg thiab electrochemical nrog corrosive media, thiab tus nqi corrosion yog ceev ceev nyob rau hauv tej yam mob. Corrosion, tshwj xeeb tshaj yog kev sib tsoo thiab khov heev. Txoj kev txhuam ntawm txoj hlua hlau steel tsis yog qhov hluav taws xob hluav taws xob.
Yog li no, txhua yam kev ntsuas yuav tsum tau muab rau thaum lub sijhawm ntawm cov khoom tsis muaj stainless kom tsis txhob muaj kuab xeb thiab kev pabcuam. Qhov tseeb, ntau xeb mob thiab kev txhawb zog (xws li khawb, txaws, slags, thiab lwm yam) muaj kev cuam tshuam txog kev zoo ntawm qhov tsis zoo ntawm cov khoom tsis muaj steel hlau fabrication thiab tsim nyog thiab yuav tsum tau kov yeej.
