Vim li cas stainless hlau xeb?
Thaum cov xim av xeb (spots) tshwm rau saum npoo ntawm cov kav hlau stainless, tib neeg xav tsis thoob: lawv xav tias "stainless steel yeej tsis xeb, thiab yog tias nws tau xeb, nws tsis yog stainless hlau, tej zaum yuav muaj teeb meem. nrog rau qhov zoo ntawm cov hlau. " Qhov tseeb, qhov no yog ib qho kev xav tsis zoo txog kev tsis nkag siab ntawm stainless hlau. Stainless hlau kuj tuaj yeem rusty nyob rau hauv tej yam kev mob.
Stainless hlau muaj peev xwm tiv taus atmospheric oxidation -- uas yog, stainless, thiab kuj muaj peev xwm yuav corroded nyob rau hauv xov xwm uas muaj acids, alkalis, thiab ntsev -- uas yog, corrosion kuj. Tab sis qhov loj ntawm nws cov kev tiv thaiv corrosion nrog tshuaj lom neeg txoj cai ntawm nws cov hlau nws tus kheej, ntxiv kev sib nrig sib lub xeev, kev ua hauj lwm tej yam kev mob thiab ib puag ncig nruab nrab hom thiab hloov. Zoo li 304 steel kav, nyob rau hauv cov huab cua ntawm qhuav cleansing, kiag li zoo resistant rau tarnishing muaj peev xwm yog teem, tab sis nws yog tsiv mus rau riviera, nyob rau hauv muaj cov hiav txwv pos huab ntawm ib tug loj npaum li cas ntawm ntsev, yuav sai sai tau rusty; zoo. Yog li ntawd, tsis yog txhua hom stainless hlau tuaj yeem tiv taus corrosion thiab xeb hauv ib puag ncig.
Muaj ntau hom kev puas tsuaj rau cov zaj duab xis saum npoo, thiab cov feem ntau tshwm sim hauv lub neej txhua hnub yog raws li hauv qab no:
Stainless hlau cia siab rau ib txheej ntawm nyias nyias, ruaj, ntom thiab ruaj khov chromium-nplua nuj oxide zaj duab xis (tiv thaiv zaj duab xis) tsim rau ntawm nws qhov chaw los tiv thaiv cov pa atoms los ntawm txuas ntxiv mus rau infiltrate thiab oxidize, yog li tau txais lub peev xwm los tiv thaiv corrosion. Ib zaug vim li cas, cov yeeb yaj kiab raug puas tsuaj tas li, cov pa oxygen atoms hauv huab cua lossis cov kua yuav tsis tu ncua los yog cov hlau atoms hauv cov hlau yuav tsis tu ncua sib cais los ntawm cov hlau oxide, thiab cov hlau saum npoo yuav tsis tu ncua rusted. Muaj ntau hom kev puas tsuaj rau zaj duab xis saum npoo no, thiab feem ntau tshwm sim hauv lub neej txhua hnub yog raws li hauv qab no:
1. Cov plua plav uas muaj lwm yam hlau los yog cov khoom sib txuas ntawm cov hlau tsis sib xws hauv cov hlau tsis zoo. Nyob rau hauv cov huab cua ntub, cov dej condensed nruab nrab ntawm cov ntawv txuas thiab cov hlau tsis muaj steel txuas ob mus rau hauv cov roj teeb micro, ua rau cov tshuaj tiv thaiv electrochemical, cov yeeb yaj kiab tiv thaiv puas, uas yog hu ua electrochemical corrosion.
2. Organic kua txiv (xws li zaub, noodle kua zaub, hnoos qeev, thiab lwm yam) ua raws li cov hlau tsis huv. Nyob rau hauv lub xub ntiag ntawm dej thiab oxygen, organic acids yuav tsim. Tau ntev, cov organic acids yuav corrode hlau nto.
3. Qhov saum npoo ntawm stainless hlau adheres rau cov kua qaub, alkali thiab ntsev (xws li alkaline dej thiab txiv qaub dej splashed rau ntawm phab ntsa rau kho kom zoo nkauj), ua rau lub zos corrosion.
4. Nyob rau hauv cov huab cua phem (xws li cov huab cua uas muaj ntau ntawm sulfide, carbon oxide, thiab nitrogen oxide), thaum nws ntsib condensed dej, nws yuav ua kua ntsiab lus ntawm sulfuric acid, nitric acid, thiab acetic acid, ua rau cov tshuaj corrosion. .
Txhawm rau kom ntseeg tau tias cov hlau saum npoo yog ci ntsa iab thiab tsis corroded, peb pom zoo:
Cov xwm txheej saum toj no tuaj yeem ua rau kev puas tsuaj rau cov yeeb yaj kiab tiv thaiv ntawm cov hlau tsis huv thiab ua rau corrosion. Yog li ntawd, txhawm rau xyuas kom meej tias cov hlau saum npoo yog qhov kaj mus tas li thiab tsis corroded, peb pom zoo:
1. Qhov saum npoo ntawm cov hniav zoo nkauj stainless hlau yuav tsum tau ntxuav thiab txhuam tsis tu ncua kom tshem tawm cov ntawv txuas thiab tshem tawm cov khoom siv sab nraud uas ua rau kev hloov kho.
2. Lub seaside cheeb tsam yuav tsum siv 316 cov khoom siv stainless hlau, 316 cov khoom tuaj yeem tiv taus seawater corrosion.
3. Cov tshuaj lom neeg muaj pes tsawg leeg ntawm qee cov kav hlau stainless hauv kev ua lag luam tsis tuaj yeem ua tau raws li cov qauv hauv tebchaws, thiab tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm 304 cov ntaub ntawv. Yog li ntawd, nws tseem yuav ua rau xeb, uas yuav tsum tau ua tib zoo xaiv cov khoom los ntawm cov tuam txhab muaj npe nrov.
Vim li cas stainless hlau kuj sib nqus?
Cov neeg feem ntau xav tias cov hlau nplaum nqus cov hlau tsis huv, thiab xyuas nws qhov zoo thiab qhov tseeb. Yog tias nws tsis nyiam thiab tsis muaj hlau nplaum, nws yog qhov zoo thiab qhov tseeb; Yog hais tias nws attracts magnetism, nws yog suav tias yog ib tug cuav. Nyob rau hauv qhov tseeb, qhov no yog ib tug tsis tshua muaj ib sab, impractical thiab tsis ncaj ncees lawm txoj kev kom paub qhov txawv.
Muaj ntau ntau hom stainless hlau, uas tuaj yeem muab faib ua ob peb pawg raws li cov qauv tsim ntawm chav tsev kub:
1. Austenitic hom: xws li 201, 202, 301, 304, 316, thiab lwm yam;
2. Martensite lossis ferrite hom: xws li 430, 420, 410, thiab lwm yam;
Austenite yog tsis sib nqus los yog tsis muaj zog sib nqus, thiab martensite lossis ferrite yog sib nqus.
Feem ntau ntawm cov hlau tsis muaj steel siv rau cov nplooj ntawv zoo nkauj yog cov khoom siv austenitic 304, feem ntau hais lus, nws tsis yog hlau nplaum los yog tsis muaj zog sib nqus, tab sis nws kuj tseem tuaj yeem tshwm sim sib nqus vim cov tshuaj muaj pes tsawg leeg hloov pauv lossis cov txheej txheem sib txawv tshwm sim los ntawm smelting, tab sis qhov no tsis tuaj yeem ua tau. suav tias yog Counterfeit lossis tsis tsim nyog, yog vim li cas?
Raws li tau hais los saum toj no, austenite tsis yog sib nqus lossis tsis muaj zog sib nqus, thaum martensite lossis ferrite yog sib nqus. Vim muaj kev sib cais los yog kev kho cua sov tsis tsim nyog thaum smelting, me me ntawm martensite lossis ferrite hauv austenitic 304 stainless hlau yuav raug tsim. lub cev nqaij daim tawv. Ua li no, 304 stainless hlau yuav muaj zog hlau nplaum.
Tsis tas li ntawd, tom qab ua haujlwm txias ntawm 304 stainless hlau, microstructure tseem yuav hloov mus rau martensite. Qhov ntau dua qhov kev ua haujlwm txias deformation, qhov hloov pauv martensite ntau dua, thiab ntau dua cov khoom sib nqus ntawm cov hlau. Zoo li ib pawg ntawm cov hlau strips, Φ76 raj yog tsim, tsis muaj qhov pom tseeb sib nqus induction, thiab Φ9.5 raj yog tsim. Qhov sib nqus induction yog qhov pom tseeb dua vim qhov loj dua txias bending deformation. Lub deformation ntawm cov kav dej square thiab cov duab plaub yog loj dua li cov kav dej puag ncig, tshwj xeeb tshaj yog nyob rau ntawm cov ces kaum, thiab qhov deformation yog khaus thiab cov hlau nplaum yog qhov pom tseeb dua.
Yuav kom tshem tawm tag nrho cov hlau nplaum ntawm 304 steel los ntawm cov laj thawj saum toj no, cov qauv austenite ruaj khov tuaj yeem rov qab los ntawm kev kho kub kub, kom tshem tawm cov hlau nplaum.
Tshwj xeeb, cov hlau nplaum ntawm 304 stainless hlau tshwm sim los ntawm cov laj thawj saum toj no tsis nyob rau tib theem li ntawm lwm cov hlau tsis muaj steel, xws li 430 thiab carbon steel, uas yog hais tias, cov hlau nplaum ntawm 304 steel ib txwm qhia tsis muaj zog hlau nplaum.
Qhov no qhia peb tias yog cov hlau tsis muaj hlau nplaum tsis muaj zog lossis tsis muaj hlau nplaum, nws yuav tsum raug txheeb xyuas raws li 304 lossis 316 khoom; Yog hais tias nws yog tib yam li carbon steel, nws qhia tau hais tias muaj zog hlau nplaum, vim nws tsis yog 304 khoom.
