Cov pa roj carbon tsawg, tseem hu ua cov hlau me me, yog ib pawg hlau-raws li alloy nrog carbon raws li cov ntsiab lus alloying tab sis cov ntsiab lus carbon tsawg dua 0.25%. Vim nws tsis tshua muaj zog, tsis tshua muaj hardness thiab softness, nws tseem hu ua me me steel. Nws suav nrog feem ntau cov pa roj carbon zoo tib yam steels thiab qee qhov zoo carbon structural steels. Feem ntau ntawm lawv yog siv rau kev tsim vaj tsev qhov chaw yam tsis muaj kev kho cua sov, thiab qee qhov yog siv rau cov khoom siv kho tshuab uas yuav tsum tau hnav tsis kam tom qab carburizing thiab lwm yam kev kho cua sov.
Cov qauv annealed ntawm cov pa roj carbon tsawg yog ferrite thiab ib qho me me ntawm pearlite, nws lub zog thiab hardness qis dua, thiab nws cov plasticity thiab toughness zoo dua. Yog li ntawd, nws qhov txias formability yog zoo, thiab nws yuav ua tau txias-tsim los ntawm txoj kev xws li crimping, dabtsi yog khoov, thiab stamping. Cov hlau no kuj muaj qhov zoo weldability. Cov pa roj carbon tsawg feem ntau yog hais txog cov hlau uas muaj cov ntsiab lus ntawm 0.10 thiab 0.25%. Cov hlau no tsis tshua muaj hardness thiab zoo plasticity. Nws yog qhov yooj yim los txais yuav txias yas deformation txheej txheem, vuam thiab txiav. Nws yog feem ntau siv los ua chains, rivets, bolts, shafts, thiab lwm yam.
Cov qauv annealed ntawm cov pa roj carbon tsawg yog ferrite thiab ib qho me me ntawm pearlite, nws lub zog thiab hardness qis dua, thiab nws cov plasticity thiab toughness zoo dua. Yog li ntawd, nws txias formability yog zoo thiab yuav ua tau txias-tsim los ntawm txoj kev xws li crimping, dabtsi yog khoov, thiab stamping. Cov hlau no muaj qhov zoo weldability. Cov pa roj carbon tsawg nrog cov ntsiab lus tsis tshua muaj carbon tsawg muaj qhov hardness tsawg thiab ua haujlwm tsis zoo. Normalizing kho tuaj yeem txhim kho nws cov machinability.
Cov pa roj carbon tsawg feem ntau yog dov rau hauv lub kaum sab xis steel, channel steel, I-beam, steel yeeb nkab, steel sawb lossis steel phaj, uas yog siv los ua ntau yam khoom siv hauv tsev, ntim khoom, thawv, lub tshuab ua kom sov thiab cov tshuab ua liaj ua teb. Cov hlau uas tsis muaj cov pa roj carbon zoo yog dov rau hauv cov phaj nyias los ua cov khoom sib sib zog nqus xws li cov tsheb cab thiab cav cav; nws kuj tau dov rau hauv cov khoom siv los ua cov khoom siv kho tshuab uas tsis muaj zog yuav tsum tau ua. Tsawg-carbon steel feem ntau tsis kho cua sov ua ntej siv. Carburized los yog cyanidized steel nrog cov ntsiab lus ntawm ntau tshaj 0.15% yog siv rau shafts, bushings, sprockets thiab lwm yam uas yuav tsum tau kub saum npoo thiab zoo hnav tsis kam.
Kev siv cov pa roj carbon tsawg yog txwv vim nws tsis muaj zog. Tsim nyog nce cov ntsiab lus ntawm manganese hauv carbon hlau, thiab ntxiv cov lej ntawm cov ntsiab lus alloying xws li vanadium, titanium, niobium, thiab lwm yam, tuaj yeem ua kom lub zog ntawm cov hlau. Yog tias cov ntsiab lus carbon hauv cov hlau raug txo thiab tsawg ntawm txhuas, me me ntawm boron thiab carbide tsim cov ntsiab lus ntxiv, ib pawg ultra-low carbon bainite tuaj yeem tau txais uas muaj lub zog siab thiab tswj kom zoo dua plasticity thiab toughness.
Cov ntsiab lus carbon ntawm cam khwb cia qis carbon steel yog tsawg dua 0.25%, thaum cov ntsiab lus carbon ntawm cam khwb cia nruab nrab carbon steel yog nruab nrab ntawm 0.25% thiab 0.60%, thiab cov ntsiab lus carbon ntawm cam khwb cia siab carbon steel yog nruab nrab ntawm 0.6% thiab 3.0%. Lub zog thiab hardness ntawm cam khwb cia carbon steel nce nrog nce cov ntsiab lus carbon.
Cam khwb cia carbon steel muaj qhov zoo hauv qab no: cov nqi tsim khoom qis dua, muaj zog dua, zoo dua toughness thiab ntau dua plasticity. Cam khwb cia carbon steel tuaj yeem siv los tsim cov khoom uas dais hnyav, xws li steel dov zeb sawv thiab hydraulic xovxwm hauv cov tshuab hnyav. Nws kuj tseem tuaj yeem siv los tsim cov khoom uas raug rau lub zog loj thiab cuam tshuam, xws li lub log, txuas txuas, bolsters thiab sab thav duab ntawm cov tsheb ciav hlau.
