Kev kho qhov chaw ntawm cov kav hlau tsis muaj seamless

Ⅰ-Kua qaubKev ua kua txob

1.- Lub ntsiab lus ntawm Acid-Pickling: Cov kua qaub yog siv los tshem tawm cov hlau oxide nplai hauv tshuaj lom neeg ntawm qee qhov concentration, kub, thiab ceev, uas hu ua pickling.

2.- Kev faib tawm ntawm Acid-Pickling: Raws li hom acid, nws muab faib ua sulfuric acid pickling, hydrochloric acid pickling, nitric acid pickling, thiab hydrofluoric acid pickling. Yuav tsum xaiv cov xov xwm sib txawv rau pickling raws li cov khoom siv ntawm cov hlau, xws li pickling carbon steel nrog sulfuric acid thiab hydrochloric acid, lossis pickling stainless hlau nrog sib xyaw ntawm nitric acid thiab hydrofluoric acid.

Raws li cov duab ntawm cov hlau, nws muab faib ua hlau pickling, forging pickling, steel phaj pickling, strip pickling, thiab lwm yam.

Raws li hom khoom siv pickling, nws muab faib ua tank pickling, semi continuous pickling, fully continuous pickling, thiab tower pickling.

3.- Lub hauv paus ntsiab lus ntawm kev siv kua qaub pickling: Kev siv kua qaub pickling yog cov txheej txheem ntawm kev tshem tawm cov hlau oxide nplai ntawm cov hlau nto siv cov txheej txheem tshuaj lom neeg, yog li nws tseem hu ua tshuaj lom neeg acid pickling. Cov hlau oxide nplai (Fe203, Fe304, Fe0) tsim rau ntawm qhov chaw ntawm cov kav hlau yog cov oxide yooj yim uas tsis yaj hauv dej. Thaum lawv raug raus rau hauv cov kua qaub lossis txau nrog cov kua qaub rau ntawm qhov chaw, cov oxide yooj yim no tuaj yeem dhau los ntawm ntau yam kev hloov pauv tshuaj nrog kua qaub.

Vim yog qhov xoob, qhov porous, thiab tawg ntawm cov oxide nplai ntawm qhov chaw ntawm cov hlau carbon lossis cov hlau tsis tshua muaj hlau, ua ke nrog kev khoov ntawm cov oxide nplai nrog rau cov hlau strip thaum lub sijhawm ncaj, kev ncab ncaj, thiab kev thauj mus los ntawm kab pickling, cov kab nrib pleb no ntxiv nce thiab nthuav dav. Yog li ntawd, cov kua qaub reacts nrog cov oxide nplai chemically thiab kuj reacts nrog cov hlau substrate hlau los ntawm cov kab nrib pleb thiab qhov pores. Uas yog hais tias, thaum pib ntawm acid ntxuav, peb cov tshuaj tiv thaiv tshuaj ntawm cov hlau oxide nplai thiab hlau hlau thiab cov kua qaub tau ua tiav tib lub sijhawm Cov hlau oxide nplai dhau los ua tshuaj tiv thaiv nrog kua qaub thiab yaj (kev yaj) Hlau hlau reacts nrog kua qaub los tsim cov roj hydrogen, uas mechanically peels tawm ntawm cov oxide nplai (mechanical peeling effect) Cov atomic hydrogen tsim tawm txo cov hlau oxides rau ferrous oxides uas yooj yim rau cov tshuaj tiv thaiv acid, thiab tom qab ntawd reacts nrog cov kua qaub kom raug tshem tawm (kev txo qis).

Ⅱ-Kev ua kom tsis muaj zog/Kev Ua Kom Tsis Muaj Zog/Kev Ua Kom Tsis Muaj Zog

1.- Lub hauv paus ntsiab lus ntawm kev ua kom tsis muaj zog: Lub tshuab ua kom tsis muaj zog tuaj yeem piav qhia los ntawm kev xav txog zaj duab xis nyias, uas qhia tias kev ua kom tsis muaj zog yog vim muaj kev sib cuam tshuam ntawm cov hlau thiab cov tshuaj oxidizing, tsim cov zaj duab xis nyias heev, ntom ntom, npog zoo, thiab nqus tau zoo rau ntawm qhov chaw hlau. Cov txheej txheem no ntawm zaj duab xis muaj nyob ua ib theem ywj pheej, feem ntau yog cov hlau oxidized. Nws ua lub luag haujlwm hauv kev sib cais tag nrho cov hlau ntawm cov khoom siv corrosive, tiv thaiv cov hlau los ntawm kev sib cuag nrog cov khoom siv corrosive, yog li ntawd feem ntau tiv thaiv kev yaj ntawm cov hlau thiab tsim lub xeev tsis ua haujlwm kom ua tiav cov nyhuv tiv thaiv xeb.

2.- Cov txiaj ntsig ntawm kev ua kom tsis muaj zog:

1) Piv nrog rau cov txheej txheem sib khi lub cev ib txwm muaj, kev kho mob passivation muaj tus yam ntxwv ntawm qhov tsis ua rau tuab ntawm cov khoom ua haujlwm thiab hloov xim, txhim kho qhov tseeb thiab ntxiv tus nqi ntawm cov khoom, ua rau kev ua haujlwm yooj yim dua;

2) Vim yog qhov xwm txheej tsis tshua muaj zog ntawm cov txheej txheem passivation, tus neeg sawv cev passivation tuaj yeem ntxiv thiab siv ntau zaus, ua rau lub neej ntev dua thiab pheej yig dua.

3) Passivation txhawb kev tsim cov pa oxygen molecular qauv passivation zaj duab xis ntawm cov hlau nto, uas yog compact thiab ruaj khov hauv kev ua tau zoo, thiab muaj tus kheej kho cov nyhuv hauv huab cua tib lub sijhawm. Yog li ntawd, piv nrog cov txheej txheem ib txwm ntawm cov roj antirust, cov yeeb yaj kiab passivation tsim los ntawm passivation yog ruaj khov dua thiab tiv taus corrosion. Feem ntau ntawm cov teebmeem them nyiaj hauv cov txheej oxide yog ncaj qha lossis tsis ncaj qha cuam tshuam rau cov txheej txheem ntawm thermal oxidation. Hauv qhov kub ntawm 800-1250 ℃, cov txheej txheem thermal oxidation siv cov pa oxygen qhuav, cov pa oxygen ntub, lossis cov pa dej muaj peb theem txuas ntxiv. Ua ntej, cov pa oxygen hauv huab cua ib puag ncig nkag mus rau hauv cov txheej oxide tsim, thiab tom qab ntawd cov pa oxygen diffuses sab hauv los ntawm silicon dioxide. Thaum nws mus txog Si02-Si interface, nws reacts nrog silicon los tsim silicon dioxide tshiab. Hauv txoj kev no, cov txheej txheem txuas ntxiv ntawm cov pa oxygen nkag diffusion reaction tshwm sim, ua rau silicon ze ntawm qhov interface hloov pauv mus rau hauv silica, thiab cov txheej oxide loj hlob mus rau sab hauv ntawm silicon wafer ntawm qee qhov nqi.

III-Phosphating

Kev kho phosphating yog ib qho tshuaj lom neeg uas tsim ib txheej zaj duab xis (phosphating zaj duab xis) rau ntawm qhov chaw. Cov txheej txheem kho phosphating feem ntau yog siv rau ntawm cov hlau, nrog lub hom phiaj ntawm kev muab ib zaj duab xis tiv thaiv kom cais cov hlau ntawm huab cua thiab tiv thaiv kev xeb; Nws kuj tseem siv tau ua tus primer rau qee yam khoom ua ntej pleev xim. Nrog rau txheej txheej phosphating no, nws tuaj yeem txhim kho qhov kev nplaum thiab kev tiv thaiv kev xeb ntawm cov xim pleev xim, txhim kho cov khoom dai kom zoo nkauj, thiab ua rau cov hlau zoo nkauj dua. Nws kuj tseem tuaj yeem ua lub luag haujlwm lubricating hauv qee cov txheej txheem ua haujlwm txias hlau.

Tom qab kev kho phosphating, qhov workpiece yuav tsis oxidize lossis xeb ntev, yog li daim ntawv thov ntawm kev kho phosphating yog dav heev thiab kuj yog ib qho txheej txheem kho hlau nto uas siv ntau. Nws yog siv ntau dua hauv kev lag luam xws li tsheb, nkoj, thiab kev tsim khoom siv tshuab.

1.- Kev faib tawm thiab daim ntawv thov ntawm phosphating

Feem ntau, kev kho saum npoo yuav muaj xim sib txawv, tab sis kev kho phosphating tuaj yeem ua raws li qhov xav tau tiag tiag los ntawm kev siv cov neeg sawv cev phosphating sib txawv los nthuav tawm cov xim sib txawv. Qhov no yog vim li cas peb feem ntau pom kev kho phosphating hauv grey, xim, lossis dub.

Hlau phosphating: tom qab phosphating, qhov saum npoo yuav pom xim zaj sawv thiab xiav, yog li nws tseem hu ua xim phosphorus. Cov tshuaj phosphating feem ntau siv molybdate ua cov khoom siv raw, uas yuav tsim cov xim zaj sawv phosphating zaj sawv rau ntawm qhov chaw ntawm cov khoom siv hlau, thiab tseem siv los pleev xim rau txheej hauv qab, kom ua tiav qhov kev tiv thaiv corrosion ntawm cov khoom ua haujlwm thiab txhim kho qhov nplaum ntawm cov txheej saum npoo.