1.Yuav ua li cas soj ntsuam cov yam ntxwv ntawm hmoov?
Xim: Greyish-dub feem ntau qhia cov hmoov hlau los yog cov khoom sib txuas / oxidation ntawm cov roj dov; greyish-dawb yuav muaj cov ntsiab lus xws li zinc thiab txhuas (yog tias nws yog daim ntawv plated) lossis roj nplua nyeem.
Wipeable: Yog tias yooj yim wiped tawm, nws yuav muaj cov kab mob ntawm qhov chaw (xws li plua plav, roj, lossis xeb- tiv thaiv cov roj oxide txheej). Yog tias ruaj khov los yog tev tawm ntawm lub substrate, nws qhia kev puas tsuaj rau cov khoom txheej txheej nws tus kheej.
Qhov chaw: Nws puas yog qhov tseeb ntawm qhov siab tshaj plaws tensile kev nyuaj siab ntawm sab ntug ntawm qhov khoov? Yog hais tias yog li ntawd, nws yog yuav luag ib tug tawg nyob rau hauv lub brittle nto txheej.
2.Qhov kev ntsuas thawj zaug yog dab tsi?
Ntxuav cov ntawv hlau: Ua tib zoo ntxuav cov ntawv saum npoo nrog cov tshuaj ntxuav hlau tshwj xeeb ua ntej khoov kom tshem tawm tej yam kab mob.
Kho cov txheej txheem khoov:
Nce lub vojvoog dabtsi yog khoov: Qhov no yog txoj hauv kev ncaj qha thiab zoo tshaj plaws los txo cov tensile strain ntawm sab nrauv.
Khoov raws cov kev taw qhia dov: Sim ua kom txoj kab khoov perpendicular mus rau dov kev taw qhia ntawm cov ntawv hlau (piv txwv li, khoov tom qab), uas feem ntau txhim kho cov khoom ductility ntawm qhov khoov.
Txo qhov nrawm nrawm: Txo cov nyhuv cuam tshuam thiab tso cai rau cov khoom kom deform ntau smoothly.
Tshawb xyuas qhov tuag: xyuas kom meej tias lub vojvoog (R) ntawm qhov khoov tuag yog du, tsis hnav, thiab huv si.
3.Dab tsi yuav cuam tshuam txog cov txheej txheem pickling thiab annealing?
Tshaj -pickling/Hydrogen Embrittlement:
Ua rau: Ntau dhau ntawm pickling concentration / kub lossis lub sijhawm ua rau dhau -corrosion ntawm cov hlau hauv paus, txawm tias hydrogen atom nkag mus.
Cov tsos mob: ntxhib, tsaus nti; brittle flakes pib ntawm qhov chaw thaum khoov; hmoov zoo.
Kev tshuaj xyuas: Tshawb xyuas cov txheej txheem khaws cia, tshwj xeeb tshaj yog cov kua qaub dawb thiab cov hlau ion concentrations.
Annealing Nto Oxidation / Carburization:
Ua rau: Kev tswj cov dej lwg tsis zoo (siab dhau) ntawm qhov chaw tiv thaiv (xws li, nitrogen- hydrogen sib tov) hauv qhov cub tawg ua rau oxidation ntawm cov phaj hlau ntawm qhov kub thiab txias, tsim ib txheej hlau oxide nyias nyias; los yog cov pa roj carbon ntau ntau nyob rau hauv cov huab cua ua rau me ntsis deg carburization, tsim cov nkig carbide txheej.
Cov tsos mob: Cov hlau phaj saum npoo yuav pom cov xim xiav me ntsis - grey lossis iridescent xim; hmoov yog flaky thaum khoov.
Kev tshuaj xyuas: Qhov no yog qhov tseem ceeb tshaj plaws los tshawb xyuas. Tshawb xyuas lub qhov cub tawg qhov sib khi, qhov purity ntawm cov roj tiv thaiv, cov dej lwg taw tes (feem ntau yuav tsum tau qis dua -40 degree), thiab cov pa oxygen seem.
4.Dab tsi yuav cuam tshuam cov teeb meem hauv cov txheej txheem dov?
Tsis zoo Roll Surface Condition:
Ua rau: Roll roughness tsis tsim nyog (tejzaum nws ntxhib dhau), hnav, lossis micro-peeling, uas "plows" lossis "tua" cov khoom nto thaum dov, ua micro- tawg.
Cov tsos mob: Cov hmoov hmoov tuaj yeem nrog rau qhov zoo, kev taw qhia khawb.
Lubrication tsis zoo:
Ua rau: Cov roj nplua nyeem tsis huv, tsis sib xws, lossis tsis txaus, ua rau muaj kev sib txhuam ntau dhau thaum lub sijhawm dov, ua rau thaj chaw "hlawv" lossis "adhesion," hloov cov qauv saum npoo.
Cov tsos mob: Tsis zoo li dotted lossis streaky tsaus me ntsis tej zaum yuav tshwm sim ntawm qhov chaw.
5.Dab tsi cuam tshuam txog cov khoom siv raw lossis cov txheej txheem?
Qhov txawv txav hauv qhov kub -rolled substrate: Qhov kub- dov coil nws tus kheej muaj cov txheej tuab ntawm cov hlau oxide uas txawv txav (xws li "liab xeb"), uas tsis tau tshem tawm tag nrho los ntawm pickling ua ntej txias dov, thiab cov residue raug nias rau hauv qhov chaw.
Tsis zoo adhesion ntawm cov txheej: Rau cov khoom xws li galvanized (GI) thiab aluminized zinc (GL), yog tias qhov adhesion ntawm txheej thiab substrate tsis zoo, cov txheej yuav tev tawm hauv daim thaum khoov, tshwm li "powder".