Qhov sib txawv tseem ceeb ntawm npua hlau thiab hlau wrought yog cov hlau npua yog cov hlau tsis huv, qhov hlau wrought yog cov hlau ntshiab tshaj plaws.
Hlau yog hlau uas peb tuaj yeem tau los ntawm lub ntiaj teb los ntawm kev khawb av. Muaj cov impurities nyob rau hauv cov hlau mined no, thiab peb tuaj yeem siv ntau yam kev tshuaj ntsuam xyuas kom huv cov hlau. Npua hlau thiab wrought hlau yog ob hom hlau uas yog categorized raws li purity.
Pig Hlau yog dab tsi?
Npua hlau yog ib hom hlau uas peb tuaj yeem tsim tau los ntawm cov hlau melting ore nrog rau charcoal thiab limestone nyob rau hauv siab heev. Tom qab cov txheej txheem txias, cov khoom tshwm sim yog hu ua npua hlau. Qhov no yog ib hom hlau uas muaj cov ntsiab lus carbon siab heev. Nws yog nkig thiab tsis ruaj khov, thiab peb tsis tuaj yeem siv nws ncaj qha rau hauv lwm daim ntawv thov.
Daim duab 01: Pig Iron uas yog siv los ua Cov Hlau Hlau
Txawm li cas los xij, kev kho kom zoo ntawm daim ntawv hlau no los ntawm kev sib txuas ntxiv thiab sib xyaw ua cov hlau wrought, cam khwb cia hlau, thiab hlau, uas muaj txiaj ntsig zoo li cov khoom siv. Npua hlau ntseeg tau pom los ntawm Suav smiths nyob rau hauv lub xyoo pua 11th. Npua hlau nyob rau hauv nws daim ntawv tseeb yog tsis muaj txiaj ntsig, tab sis ntxiv ua thiab refining ua rau wrought hlau thiab hlau, uas yog ua ke cov ntaub ntawv siv dav tshaj plaws hauv ntiaj teb.
Yuav ua li cas yog hlau?
Wrought hlau yog cov hlau ntshiab tshaj plaws muaj rau kev lag luam. Hom hlau no muaj 99.5 - 99.9% hlau los ntawm qhov hnyav. Feem ntau, wrought hlau muaj 0.02% carbon, 0.108% sulfur, 0.12% Silicon, 0.02% Phosphorous thiab 0.07% slag los ntawm qhov hnyav. Slag muaj silicates, aluminosilicates, thiab calcium-alumina-silicates.
Kev tsim cov hlau wrought suav nrog kev ua kom zoo dua thiab smelting npua hlau hauv cov khoom-lub xeev. Raws li lo lus "wrought" txhais tau tias, wrought hlau yog tsim los ntawm hammering (ua haujlwm) ntawm qhov kub thiab txias, uas txhais tau hais tias slag raug tshem tawm los ntawm kev ua haujlwm hlau. Tsis tas li ntawd, peb tuaj yeem ua qhov txo qis hauv qhov cub tawg.
Daim duab 02: Wrought Iron Railing
Ntxiv mus, wrought hlau yog qhov tseem ceeb los ua cov hlau thiab cam khwb cia hlau. Nws yog ductile, tawv, malleable, thiab muaj zog nyob rau hauv tensile loads. Txawm li cas los xij, nws tsis tuaj yeem tiv taus tam sim ntawd thiab dhau kev poob siab. Lub xub ntiag ntawm cov pa roj carbon monoxide, uas suav nrog nws qhov kev tiv thaiv corrosion, ua rau nws tsim nyog rau kev siv sab nraum zoov xws li rooj vag, kev siv cov qauv, railings, thiab lwm yam. Ib qho tawg ntawm wrought hlau nthuav tawm cov qauv fibrous. Lub crystallization ntawm wrought hlau yog sib sau ua ke ntawm cubical crystals.
Qhov txawv ntawm Pig Hlau thiab Wrought Iron yog dab tsi?
Npua hlau thiab wrought hlau yog ob hom hlau uas tau muab faib raws li kev huv. Qhov sib txawv tseem ceeb ntawm npua hlau thiab wrought hlau yog cov hlau npua yog cov hlau tsis huv, hos wrought hlau yog cov hlau ntshiab tshaj plaws. Tsis tas li ntawd, cov npua hlau yog tsim los ntawm melting hlau ore nrog rau charcoal thiab limestone nyob rau hauv siab heev, whereas lub wrought hlau yog tsim los ntawm refining thiab smelting npua hlau nyob rau hauv ib tug solid-state.
Cov lus hauv qab no qhia qhov sib txawv ntawm npua hlau thiab wrought hlau rau ib sab ntawm kev sib piv.
Summary – Pig Iron vs Wrought Iron
Npua hlau thiab wrought hlau yog ob hom hlau uas tau muab faib raws li kev huv. Qhov sib txawv tseem ceeb ntawm npua hlau thiab wrought hlau yog cov hlau npua yog cov hlau tsis huv, qhov hlau wrought yog cov hlau ntshiab tshaj plaws.
