1. Kev cuam tshuam rau lub zog: Kev daws teeb meem me me zog
Yield zog: Hauv cov ntsiab lus Cu txheem (0.20–0.50%), yield zog nce los ntawm15-30 MPapiv rau cov pa roj carbon steel ntawm tib lub hauv paus muaj pes tsawg leeg.
Tensile zog: Tensile zog nce los ntawm20-40 MPanrog tib Cu ntau yam, kev txhawb nqa nruab nrab uas tsis dhau - tawv steel.
Excess Cu (>0.50%): Tshaj li tus qauv ntau, cov tooj liab sib cais ntawm cov ciam teb ntawm cov qoob loo thiab cov ntawv nkig intermetallic theem (piv txwv li, Cu-Fe alloys), uas tuaj yeem ua rau lub zog me ntsis thiab txo qis hauv cov tawv nqaij (xws li cov qauv huab cua huab cua).
2. Kev cuam tshuam ntawm Ductility & Toughness: Tsawg tsawg, kev sib koom ua ke
Ductility (elongation): Copper ntxiv li ntawm 0.20–0.50% ua rau tsuas yog a1-2% txo qis hauv elongation(piv txwv li, los ntawm ~ 22% mus rau ~ 20% rau nyias daim hlau), ib qho kev hloov pauv tsis txaus ntseeg uas khaws cov hlau ua kom txias txias, dov, thiab txiav.
Tsawg-kub toughness: Copper ib leeg muaj cov nyhuv toughening me ntsis, thiab thaum ua ke nrog npib tsib xee (Ni) (xws li, hauv ASTM A588) lossis chromium (Cr) (piv txwv li, hauv Q355NH), nwstxo cov ductile - mus rau - brittle transition kub (DBTT)los ntawm10-20 degrees. Qhov kev sib koom ua ke no ua kom cov hlau tsis muaj zog ntawm qhov kub thiab txias (xws li -20℃txog -40 degree) yam tsis muaj pob txha tawg.
3. Kev cuam tshuam rau Formability & Weldability: Tsis muaj kev cuam tshuam loj heev
Formability: Lub zog nruab nrab nce thiab qis qis qis txhais tau hais tias huab cua steel nrog cov qauv Cu cov ntsiab lus khaws cia txias formability zoo - nws tuaj yeem khoov, nkhaus, thiab yob- ua rau cov duab nyuaj (xws li, daim hlau corrugated, pergolas) nrog cov txheej txheem tsim khoom (tsuas yog me ntsis loj dua khoov radii tej zaum yuav xav tau rau cov pa roj carbon tuab).
Weldability: Copper yog ib qho qis -carbon sib npaug (CE) lub caij, yog li nws tsis ua rau cov hlau hardenability lossis pheej hmoo ntawm kev sib tsoo. Nrog cov txheej txheem vuam electrodes (piv txwv li, E7018-W rau cov huab cua huab cua), cov pob qij txha sib txuas ua kom muaj zog thiab tiv taus corrosion, tsis muaj tshwj xeeb ua ntej- cua sov lossis tom qab vuam cua sov yuav tsum tau siv rau feem ntau cov ntawv thov.
4. Kev sib koom ua ke tseem ceeb nrog lwm cov khoom siv hlau
Chromium (Cr): Ua kom tiav cov tooj liab cov tshuaj tiv thaiv kom muaj zog thiab ua kom cov microstructure, ntxiv dag zog thiab toughness.
Nickel (Ni): Txhim kho tooj liab lub toughening nyhuv thiab txhim kho weld joint ductility.
Phosphorus (P): Txhawb nqa grain refinement, uas ua hauj lwm nrog tooj liab los txhawb lub zog tsis muaj ntau ductility poob.
