Koj puas paub yog vim li cas vim li cas lub tsheb ciav hlau lem yog ua los ntawm rusty hlau es tsis txhob stainless hlau?
Railway rails, luv luv rau railway lem, yog ua los ntawm steel nrog siab hardness thiab toughness. Yog vim li cas yog tias manganese steel yog ib qho nyuaj, hnav-tiv taus thiab muaj qee yam kev cuam tshuam toughness, uas ua tau raws li cov kev cai rau kev tsim khoom.
Manganese rails yog tuab heev. Thaum oxidation xeb zaj duab xis tsim rau ntawm qhov chaw, nws yuav tiv thaiv sab hauv thiab yuav tsis cuam tshuam rau kev siv.
Hlau thiab hlau yog txawv los ntawm lawv cov ntsiab lus carbon. Hlau-carbon alloys nrog cov ntsiab lus carbon tsawg dua 2% yog hu ua hlau, thiab cov uas muaj cov ntsiab lus carbon ntau dua 2% hu ua npua hlau.
Los ntawm kev xav metallurgical, tsis muaj qhov zoo li cov hlau tsis muaj hlau. Stainless hlau kuj yog hom hlau. Steel muaj toughness, elasticity thiab rigidity. Raws li kev xeb yog kev txhawj xeeb, xeb txhais tau tias nws tsis tiv taus corrosion. Lub ntsiab tseem ceeb uas txiav txim siab qhov corrosion kuj ntawm stainless hlau yog chromium.
Hlau nrog cov ntsiab lus chromium ntau dua 10.5% yuav tsis xeb. Nyob rau lub sijhawm no, oxidation ntawm chromium thiab corrosive nruab nrab tsim cov oxide zaj duab xis rau ntawm qhov chaw, uas tuaj yeem tiv thaiv kev xeb ntxiv.
Tus nqi ntawm kev ua hlau yog qis dua li ntawm cov hlau tsis muaj steel. Thaum tsim thiab tsim cov khoom lag luam nrog lub neej luv luv thiab cov hlau zoo tuaj yeem ua tau raws li cov khoom siv, cov hlau yuav siv tau.
Railroad yog ib lo lus siv, nws yog steel rail. Txhawm rau txhim kho lub zog compressive thiab hnav-resistant, manganese feem ntau yog ntxiv. Stainless hlau feem ntau yog ntxiv nrog chromium thiab molybdenum los tiv thaiv oxidation thiab corrosion. Thaum siv cov ntsia hlau, lub zog, hnav tsis kam, yoog raws, plasticity thiab corrosion kuj yuav tsum raug txiav txim siab. Txawm li cas los xij, lub zog siab thiab hnav tsis kam yog thawj qhov kev xaiv. Stainless hlau yuav tsis siv yog tias nws tsis ua raws li qhov yuav tsum tau ua.
duab
Qhov laj thawj yog vim li cas stainless hlau tsis tuaj yeem siv yog vim nws tsis ruaj txaus thiab yooj yim puas los ntawm thermal expansion thiab contraction. Stainless hlau tuaj yeem yooj yim puas los ntawm cua txhua hnub, nag, thiab raug. Txawm hais tias hom kev siv lub zog siab no zoo li xeb, tsuas yog ib txheej ntawm xeb ntawm qhov chaw, thiab sab hauv tseem zoo li qub.
Tsis tas li ntawd, manganese rails yog tuab heev. Thaum oxidation xeb zaj duab xis yog tsim rau saum npoo, nws yuav tiv thaiv sab hauv thiab yuav tsis cuam tshuam rau kev siv.
Ua ntej ntawm tag nrho cov, technically hais: feem ntau cov neeg xav tias stainless hlau tsis xeb, tab sis qhov tseeb qhov teeb meem yog hais tias stainless hlau, zoo li lwm yam alloys, kuj rusts, tab sis cov xim ntawm cov oxide zaj duab xis (xeb) nyob rau saum npoo ntawm stainless hlau tom qab. nws rusts yog cov tsos xim ntawm stainless hlau. , thiab cov oxide zaj duab xis no yog qhov ntom ntom, uas tuaj yeem tiv thaiv cov ntaub so ntswg los ntawm kev ntxiv oxidation thiab xeb.
Txawm li cas los xij, cov oxide zaj duab xis no tseem tuaj yeem raug corroded nyob rau hauv tej yam kev mob, tshwj xeeb tshaj yog nyob rau hauv cov av noo acidic ib puag ncig.
Yog li ntawd, stainless hlau tsis tuaj yeem siv ntau zaus. Muaj ntau ntau yam ntawm stainless hlau, thiab stainless hlau (tshwj xeeb tshaj yog austenitic stainless hlau) muaj tsawg hardness. Piv txwv li, nws yog ib qho nyuaj rau sharpening thaum siv los ua riam, thiab txawm yog sharpened, nws yuav yooj yim ua npub; Cov neeg muaj kev paub paub paub tias cov ntawv hlau Stainless ci ntsa iab tau yooj yim khawb vim lawv qhov muag muag.
duab
Yog li ntawd, technically hais lus, stainless hlau tsis xeb, tab sis cov xim tom qab rusting zoo ib yam li cov xim ua ntej rusting; nws qhov kev ua tau zoo tsis haum rau kev siv nyob rau hauv txhua qhov chaw, yog li stainless hlau feem ntau tsis tuaj yeem siv los hloov lwm cov ntaub ntawv.
Nyob rau hauv cov nqe lus ntawm cov peev txheej, nickel thiab chromium siv hauv stainless hlau yog cov ntxhia tsis tshua muaj, tshwj xeeb tshaj yog npib tsib xee. Cov khoom siv tau zoo thiab siv tau yooj yim yuav tsum tau siv rau hauv qhov chaw tseem ceeb thiab tsis tuaj yeem siv tsis tu ncua thiab khib nyiab.
Nyob rau hauv cov nqe lus ntawm tus nqi, tus nqi ntawm kev yuav khoom, ua qhov chaw, thiab kev txhim kho cov cav tov yuav muab tag nrho rau hauv kev txiav txim. Tus nqi ntawm stainless hlau tsis yog tsuas yog me ntsis siab dua tus nqi ntawm lwm cov ntaub ntawv xws li cov hlau zoo tib yam, txhuas, magnesium-aluminium alloys, plastics, thiab lwm yam, tab sis qhov txawv yog ob peb zaug ntau dua. Ntev npaum li cov ntaub ntawv pheej yig tuaj yeem ua tau raws li qhov yuav tsum tau ua, leej twg yuav siv cov khoom kim?
Tsis tas li ntawd, txawm tias lwm cov ntaub ntawv yog xeb thiab tsis xeb-resistant, tam sim no muaj ntau yam kev kho saum npoo av uas tuaj yeem tiv thaiv cov ntaub ntawv los ntawm corrosion, xws li: tshuaj tsuag pleev xim, hmoov txau, electroplating, electrophoresis, nto oxidation, tshuaj kho deg ( nitriding, cyanide tshuaj, thiab lwm yam) tuaj yeem txhim kho qhov teeb meem corrosion ntawm cov ntaub ntawv. Yog li ntawd, nws tsis tas txhais hais tias cov ntaub ntawv rusty tsis tuaj yeem siv rau hauv qhov chaw uas muaj corrosion.
duab
Ua ke, stainless hlau tsis tuaj yeem siv los hloov tag nrho lwm cov ntaub ntawv. Tsuas yog tom qab kev txiav txim siab tag nrho xws li kev ua haujlwm ib feem, kev ua haujlwm ntawm cov khoom siv, kev ua haujlwm ib puag ncig, tus nqi ib feem, kev ua tau zoo thiab muaj peev xwm, tuaj yeem xaiv cov khoom tsim nyog rau ib feem. . Nws tsis tuaj yeem hais nyob rau hauv cov ntsiab lus hais tias tag nrho cov ntaub ntawv stainless hlau yuav tsum tau siv los hloov. Hauv cov khoom siv loj thiab cov ntaub ntawv loj, muaj cov kev kawm tshwj xeeb los qhia seb yuav xaiv cov khoom siv thiab cov khoom siv li cas.
Tsheb ciav hlau lem yog cov tsim kev khiav tsheb ciav hlau thiab yog ib tug indispensable qauv rau tam sim no lub tsheb ciav hlau thiab railway technology. Tej zaum koj yuav tau pom tias qhov pib tag nrho cov tsheb ciav hlau khiav yog rusty, txawm tias cov tsheb ciav hlau tsim tshiab yog zoo li no. Tsis tsuas yog lub neej ntawm rusty hlau cov khoom yuav luv luv, tab sis nws kuj yuav ua tsis taus.
Thaum kawg, ntawm no yog ib daim vis dis aus ntawm kev tsim tsheb ciav hlau.
