Carbon Steel vs Stainless Steel: Kev Tshawb Fawb Sib Piv
Thaum nws los txog rau kev xaiv cov ntaub ntawv rau ntau yam kev siv, ob qho ntawm feem ntau suav hais tias yog hlau yog carbon steel thiab stainless hlau. Ob leeg muaj cov khoom tshwj xeeb uas ua rau lawv haum rau cov hom phiaj sib txawv, tab sis lawv kuj muaj qhov sib txawv sib txawv uas tuaj yeem cuam tshuam rau lawv cov kev ua tau zoo thiab kev siv nyiaj. Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv qhov sib txawv tseem ceeb ntawm carbon steel thiab stainless hlau, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm tsos, corrosion kuj, hnav tsis kam, nqi, thiab ductility.
Qhov tshwm sim
Cov pa roj carbon steel muaj matte lossis npub tiav, uas tuaj yeem sib txawv ntawm cov nyiaj-grey mus rau qhov tsaus grey nyob ntawm cov ntsiab lus tshwj xeeb alloy thiab kev kho saum npoo. Nws yooj yim rau oxidation thaum raug cov dej noo, ua rau kev tsim cov xeb, uas tuaj yeem cuam tshuam rau nws txoj kev zoo nkauj dua lub sijhawm.
Stainless hlau, ntawm qhov tod tes, boasts ib ci iab, reflective nto uas tiv taus tarnishing thiab staining. Qhov no ua rau nws tsim nyog rau cov ntawv thov uas yuav tsum tau ua kom huv si, polished zoo li, xws li cov khoom siv hauv chav ua noj, cov khoom siv vaj tse, thiab cov khoom zoo nkauj.
Corrosion Resistance
Ib qho ntawm cov teeb meem tseem ceeb ntawm cov pa roj carbon steel yog nws qhov cuam tshuam rau corrosion. Thaum raug ya raws thiab huab cua, carbon hlau tuaj yeem oxidize sai, ua xeb. Qhov no tsis tsuas yog cuam tshuam rau cov tsos ntawm cov khoom, tab sis kuj tseem tuaj yeem ua rau nws cov qauv kev ncaj ncees tsis muaj zog thaum lub sijhawm.
Stainless hlau yog renowned rau nws zoo heev corrosion kuj, ua tsaug rau lub xub ntiag ntawm chromium nyob rau hauv nws alloy muaj pes tsawg leeg. Cov chromium tsim cov txheej txheem tiv thaiv oxide ntawm cov hlau, uas tiv thaiv oxidation thiab corrosion ntxiv. Qhov no ua rau stainless hlau zoo tagnrho rau siv nyob rau hauv ib puag ncig uas raug rau ya raws, tshuaj, los yog lwm yam corrosive agents.
Hnav Resistance
Cov pa roj carbon steel feem ntau muaj kev hnav zoo dua piv rau cov hlau tsis muaj steel, tshwj xeeb tshaj yog nyob rau qib siab zog. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas xav tau kev ua haujlwm ntev thiab lub zog, xws li cov cuab yeej, cov khoom siv tshuab, thiab cov khoom siv.
Txawm hais tias stainless hlau yog ntau dua corrosion-resistant, nws feem ntau muaj qis hnav tsis kam piv rau carbon steel. Txawm li cas los xij, qee qib ntawm stainless hlau, xws li martensitic thiab nag lossis daus-hardening stainless hlau, tuaj yeem kho cua sov los txhim kho lawv cov tawv tawv thiab hnav tsis kam, ua rau lawv haum rau cov ntawv thov tshwj xeeb.
Nqe
Carbon steel feem ntau pheej yig dua li stainless hlau. Nws cov nqi qis dua ua rau nws yog qhov kev xaiv nrov rau ntau cov ntawv thov kev lag luam thiab kev tsim kho uas qhov kev txwv nyiaj txiag yog qhov kev txiav txim siab.
Stainless hlau feem ntau kim dua vim nws cov ntsiab lus alloy siab dua thiab cov txheej txheem tsim khoom sib koom ua ke. Txawm li cas los xij, nws qhov kev tiv thaiv corrosion zoo dua thiab kev ua neej ntev dua tuaj yeem ua pov thawj tus nqi pib ntau dua, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas kho thiab hloov cov nqi tseem ceeb.
Ductility
Stainless hlau yog ntau dua ductile tshaj carbon steel, feem ntau vim hais tias stainless hlau muaj ib tug ntau dua nickel ntsiab lus, thiab cov ntsiab lus tseem ductile ntau, yog li stainless hlau kuj yuav ductile ntau. Cov pa roj carbon steel muaj tsawg dua nickel, uas tuaj yeem tsis quav ntsej ncaj qha, tab sis muaj qhov tsis zoo.
Carbon steel thiab stainless hlau muaj tib lub hauv paus muaj pes tsawg leeg ntawm hlau thiab carbon. Lawv qhov sib txawv tseem ceeb yog cov ntsiab lus alloy - carbon hlau muaj cov ntsiab lus alloy tsawg dua 10.5%, thaum stainless hlau yuav tsum muaj 10.5% lossis ntau dua chromium. Qhov sib txawv tseem ceeb no yog vim li cas carbon steel thiab stainless hlau muaj lub cev tshwj xeeb.
Cov ntsiab lus tseem ceeb ntawm cov hlau yog hlau thiab carbon. Feem ntau hais lus, steel nrog cov ntsiab lus carbon ntau dua yog qhov nyuaj thiab nkig, thaum cov hlau nrog cov ntsiab lus qis dua yog cov ductile thiab tawv. Tau kawg, nws tsis tshua yooj yim. Alloying cov ntsiab lus xws li chromium, molybdenum, npib tsib xee, manganese, los yog silicon yuav raug ntxiv los txhim kho corrosion los yog kom ua tiav qhov sib npaug ntawm lub zog thiab tawv.
Cov pa roj carbon steel
Carbon steel muaj hlau thiab 0.12 - 2.00% carbon. Cov ntsiab lus dav dav suav nrog cov hlau alloy, uas tuaj yeem muaj cov ntsiab lus alloy siab txog 10.5%. Txawm tias nyob rau hauv thaj tsam ntawm tsawg dua ob feem pua ntawm cov pa roj carbon, muaj qhov sib txawv loj hauv lub cev, tshwj xeeb tshaj yog hardness.
Thaum tib neeg tham txog carbon steel, lawv feem ntau yog xa mus rau high-carbon steels siv rau riam thiab cov cuab yeej. High-carbon steels yog qhov nyuaj heev, uas ua rau lawv zoo heev ntawm kev tiv thaiv hnav thiab khaws lawv cov duab. Lawv tuaj yeem tiv taus lub zog loj ua ntej deforming. Hmoov tsis zoo, cov hlau tawv kuj yog nkig: thaum muab tso rau hauv qhov kev ntxhov siab hnyav, cov pa roj carbon ntau dua yuav tawg dua li khoov.
Cov hlau me me muaj ntau dua li cov hlau uas muaj cov pa roj carbon ntau vim (1) lawv tsis tshua muaj nqi los tsim, (2) lawv muaj ntau dua, thiab (3) lawv yooj yim rau kev tsim. Cov hlau me me zoo li deform ntau dua li tawg hauv kev ntxhov siab, thiab qhov ductility no ua rau lawv yooj yim rau tshuab thiab vuam. Lawv feem ntau siv nyob rau hauv tsheb lub cev panels, bolts, clamps, thiab steel daim hlau.
Stainless hlau
Stainless hlau muaj hlau, carbon, thiab tsawg kawg yog 10.5% chromium cov ntsiab lus. Chromium yog qhov tseem ceeb - nws reacts nrog oxygen los tsim ib txheej passive uas tiv thaiv cov hlau los ntawm corrosion. Qhov kev tiv thaiv no txo qis qhov yuav ua rau cov hlau tsis muaj xeb-tseem ceeb rau cov rooj tog zaum sab nraum zoov uas yuav raug ntsia rau hauv qhov chaw ntub dej. Qhov siab dua cov ntsiab lus chromium, qhov zoo dua qhov corrosion kuj. Thaum yuav cov khoom siv thiab lwm yam khoom loj, nco ntsoov ua tib zoo saib xyuas cov qib stainless hlau. Tsis yog tag nrho cov hlau yog tsim sib npaug. Stainless hlau nrog qhov tsawg kawg nkaus 10.5% chromium cov ntsiab lus yog pheej yig dua thiab tsis tshua muaj zog dua stainless hlau nrog 16% chromium, thiab qhov sib txawv yuav cuam tshuam txog kev saib xyuas cov nqi thiab kev ua neej nyob.
Ua tsaug rau koj nyeem, yog tias koj xav pom ntau yam uas peb yuav tsum muaj koj tuaj yeem ua raws li cov ntawv txuas hauv qab no!