Qhov sib txawv tseem ceeb ntawm cov hlau thiab graphite hlau yog cov hlau tsis muaj cov ntsiab lus carbon tsawg thaum graphite irons muaj cov ntsiab lus carbon siab. Hlau yog cov hlau alloy uas muaj hlau, carbon thiab lwm yam khoom sib xyaw ua ke thaum graphite hlau yog hlau alloy uas muaj graphite nrog rau hlau.
Ob lub hlau thiab graphite hlau yog cov hlau alloys thiab sib txawv hauv cov ntsiab lus carbon.
Dab tsi yog Steel?
Steel yog ib qho alloy ntawm hlau thiab carbon nrog rau lwm yam tshuaj. Cov ntsiab lus ntawm cov pa roj carbon monoxide hauv cov hlau no nce mus txog 2% los ntawm qhov hnyav. Cov khoom tseem ceeb tshaj plaws ntawm cov hlau no yog lub zog tensile siab thiab tus nqi qis. Qhov no yog cov khoom siv tshaj plaws rau kev tsim kho vaj tse. Tsis tas li ntawd, nws muaj txiaj ntsig zoo rau kev tsim cov cuab yeej rau kev tsim kho thiab.
Cov qauv siv lead ua ntawm cov hlau ntshiab muaj qhov ua haujlwm me me rau cov hlau atoms plam ib leeg. Yog li ntawd, hlau ntshiab yog ductile heev. Tab sis cov hlau muaj cov pa roj carbon thiab lwm yam khoom siv uas tuaj yeem ua cov tshuaj tawv tawv. Yog li, qhov ductility ntawm steel yog qis dua li cov hlau ntshiab. Cov qauv siv lead ua ntawm cov hlau ntshiab muaj qhov sib txawv uas txav tau, ua rau cov hlau txuas, tab sis hauv cov hlau, cov khoom xws li carbon tuaj yeem tiv thaiv kev txav ntawm cov dislocations ntawm kev nkag mus rau hauv cov qauv siv lead ua ntawm hlau.
Daim duab 01: Cov rooj zaum ua los ntawm cov hlau
Muaj 4 hom hlau sib txawv;
- carbon steel - hlau thiab carbon
- Alloy steel - hlau, carbon, thiab manganese
- Stainless hlau - hlau, carbon, thiab chromium
- Cov cuab yeej hlau - hlau thiab cov lej ntawm tungsten thiab molybdenum
Ntxiv mus, cov hlau ua rau xeb thaum raug huab cua thiab ya raws, tshwj tsis yog cov hlau tsis muaj steel. Stainless hlau muaj chromium uas muab cov cuab yeej ntawm corrosion kuj los ntawm kev tsim cov chromium oxide txheej ntawm cov hlau nto thaum nws raug rau huab cua.
Graphite Irons yog dab tsi?
Graphite hlau yog cov hlau thiab graphite. Muaj ntau ntau hom graphite hlau raws li hauv qab no. Cov hom no txawv ntawm ib leeg raws li lawv cov khoom siv tshuaj thiab lub cev vim tias cov hlau no muaj cov pa roj carbon sib txawv hauv daim ntawv ntawm graphite.
- Grey iron – daim ntawv no muaj xim grey. Lub graphite zoo li flaked. Nws muaj lub tshuab ua haujlwm siab thiab hnav tsis kam.
- Ductile hlau / spheroidal graphite hlau- graphite tshwm sim hauv daim ntawv nodules. Lub ductility toughness yog siab heev.
Daim duab 02: Lub Microstructure ntawm Cov Hlau Hlau
Compacted graphite hlau - qhov no muaj graphite li worm zoo li cov qauv. Cov graphite no tshwm sim raws li luv thiab tuab heev. Cov khoom ntawm hom no yog nyob nruab nrab ntawm cov hlau grey thiab cov hlau nplaum
Qhov txawv ntawm Hlau thiab Graphite Irons yog dab tsi?
Summary – Steel vs Graphite Irons
Hlau thiab graphite hlau yog cov ntaub ntawv ntawm cov hlau alloys uas muaj hlau thiab carbon. Qhov txawv ntawm cov hlau thiab graphite hlau yog cov hlau tsis muaj cov ntsiab lus carbon tsawg whereas graphite irons muaj cov ntsiab lus siab carbon.
