Cov ntsiab lus carbon thiab nws cov teebmeem
Carbon plays lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws lub zog thiab hardness. Raws li cov ntsiab lus carbon nce, lub zog tensile thiab hardness ntawm steel kuj nce. Txawm li cas los xij, cov ntsiab lus ntau dua cov pa roj carbon monoxide txo cov ductility thiab toughness, ua rau cov hlau muaj kev cuam tshuam rau cov pob txha tawg. Thiab carbon kuj cuam tshuam lub peev xwm ntawm cov hlau mus rau kev kho cua sov thiab tsim cov microstructures sib txawv. Tsis tas li ntawd, carbon cuam tshuam rau weldability ntawm hlau. Cov ntsiab lus carbon ntau dua ua rau cov hlau tsis yooj yim rau vuam vim tias cov kab nrib pleb thiab lwm yam vuam tsis zoo yuav ua rau ntau dua.
Manganese cov ntsiab lus thiab nws cov teebmeem
Manganese yog ib qho tseem ceeb alloying ntsiab uas txhim kho lub zog thiab toughness ntawm hlau. Nws kuj tseem pab kom tsis txhob muaj qhov tsis zoo ntawm cov sulfur ntawm toughness. Manganese txhawb kev tsim ntawm qhov xav tau microstructure, txhim kho cov hardenability ntawm hlau thiab ua tiav cov lus teb zoo dua kev kho cua sov.
Silicon cov ntsiab lus thiab nws cov teebmeem
Silicon txhim kho lub zog thiab hardness ntawm cov hlau los ntawm kev tsim intermetallic compounds nrog hlau. Nws kuj tseem txhim kho cov hlau tsis kam tiv thaiv oxidation thiab oxidation tsis kam, ua rau nws tsim nyog rau cov ntawv thov kub. Silicon kuj tuaj yeem txhim kho cov weldability ntawm cov hlau los ntawm kev txo qhov kev pheej hmoo ntawm kub tawg.
Phosphorus Cov ntsiab lus thiab nws cov teebmeem
Txawm hais tias phosphorus feem ntau suav hais tias yog impurity, nws tau ntxiv me me los txhim kho lub zog thiab atmospheric corrosion kuj. Txawm li cas los xij, phosphorus ntau dhau txo qhov toughness thiab ductility, yog li nws cov ntsiab lus tau ua tib zoo tswj.
Cov Ntsiab Lus: API kab yeeb nkab kuj tseem muaj cov lej ntawm lwm cov hlau alloying xws li vanadium (V) thiab niobium (Nb). Cov ntsiab lus no nce lub zog thiab toughness ntawm cov hlau los ntawm kev tsim cov precipitates zoo uas inhibit dislocation motion thiab grain loj hlob thaum tshav kub kub kev kho mob thiab kev pab cuam tej yam kev mob.
API Kab yeeb nkab thiab casing
