Hauv kev tsim khoom, muaj ob hom kev kho deg: txheej txheem kho lub cev thiab txheej txheem tshuaj lom neeg. Blackening ntawm stainless hlau nto yog txheej txheem siv ntau hauv kev kho tshuaj.
Lub hauv paus ntsiab lus: Los ntawm kev kho tshuaj, ib txheej ntawm oxide zaj duab xis yog tsim los ntawm cov hlau nto, thiab kev kho saum npoo yog ua tiav los ntawm oxide zaj duab xis. Lub hauv paus ntsiab lus siv nyob rau hauv cov txheej txheem kev kho saum npoo no yog tsim cov oxide zaj duab xis ntawm cov hlau nto nyob rau hauv qhov kev txiav txim ntawm cov khoom siv sib xws, uas tuaj yeem cais cov hlau los ntawm kev sib cuag ncaj qha nrog ib puag ncig sab nraud.
Cov txheej txheem ntau rau blackening stainless hlau yog raws li nram no:
Qeb 1: Acid coloring method
(1) Molten dichromate txoj kev. Raus dej stainless hlau qhov chaw nyob rau hauv molten sodium dichromate tov thiab do kom huv si rau 20-30 feeb los tsim ib tug dub oxide zaj duab xis. Tshem tawm thiab txias, tom qab ntawd yaug nrog dej.
(2) Chromate dub tshuaj oxidation txoj kev. Cov txheej txheem ntawm kev hloov xim ntawm txheej zaj duab xis no yog los ntawm lub teeb mus rau qhov tsaus ntuj. Thaum nws hloov los ntawm lub teeb xiav mus rau xiav xiav (los yog ntshiab dub), lub sij hawm luv luv tsuas yog 0.5-1 feeb. Yog tias qhov kev pom zoo no ploj lawm, nws yuav rov qab los rau lub teeb xim av thiab tsuas yog muab tshem tawm thiab rov xim dua.
2. Cov txheej txheem vulcanization tuaj yeem tau txais cov yeeb yaj kiab dub zoo nkauj, uas yuav tsum tau khaws nrog aqua regia ua ntej oxidation
3. Alkaline oxidation txoj kev. Alkaline oxidation yog cov tshuaj npaj nrog sodium hydroxide, nrog lub sijhawm oxidation ntawm 10-15 feeb. Cov yeeb yaj kiab dub oxide muaj kev hnav zoo thiab tsis tas yuav kho kom zoo. Lub sij hawm ntsev tsuag yog feem ntau ntawm 600-800 teev. Muaj peev xwm tswj tau qhov zoo ntawm stainless hlau yam tsis muaj xeb.
Qeb 2: Electrolytic oxidation method
Kev npaj: (20-40g / L dichromate, 10-40g / L manganese sulfate, 10-20g / L boric acid, 10-20g / L / PH3-4). Cov xim pleev xim rau hauv 10% HCl tov ntawm 25C rau 5 feeb, thiab tsis muaj xim hloov lossis tev tawm ntawm txheej zaj duab xis sab hauv, qhia tau hais tias zoo corrosion kuj ntawm cov zaj duab xis txheej. Tom qab electrolysis, 1Cr17 ferritic stainless hlau yog blackened sai heev, thiab tom qab ntawd hardened kom tau ib tug dub oxide zaj duab xis nrog uniform xim, elasticity, thiab ib tug tej degree ntawm hardness. Cov yam ntxwv yog cov txheej txheem yooj yim, ceev ceev blackening ceev, zoo xim nyhuv, thiab zoo corrosion kuj. Nws yog tsim rau deg blackening kev kho mob ntawm ntau yam stainless steels thiab yog li ntawd muaj nuj nqis nqis nqis.
Qeb 3: QPQ Thaum tshav kub kub txoj kev
Ua nyob rau hauv cov khoom siv tshwj xeeb, txheej zaj duab xis yog ruaj thiab muaj kev hnav zoo; Txawm li cas los xij, vim qhov tseeb tias stainless hlau, tshwj xeeb tshaj yog austenitic stainless hlau, tsis muaj peev xwm tiv thaiv xeb tib yam li ua ntej tom qab kho QPQ. Yog vim li cas yog tias cov ntsiab lus chromium nyob rau saum npoo ntawm austenitic stainless hlau tau puas lawm. Vim tias nyob rau hauv cov txheej txheem dhau los ntawm QPQ, uas yog cov txheej txheem nitriding, cov pa roj carbon thiab nitrogen cov ntsiab lus yuav nkag mus, ua rau muaj kev puas tsuaj rau cov qauv saum npoo. Yooj yim rau xeb, ntsev tsuag tsis zoo tsuas yog xeb hauv ob peb teev. Vim qhov no tsis muaj zog, nws practicality yog txwv.
Post lub sij hawm: Aug-29-2024