Lub luag hauj lwm ntawm Oxygen ntsiab lus nyob rau hauv ntshiab tooj liab

1. Lub luag haujlwm ntawm Oxygen Cov ntsiab lus hauv cov tooj liab ntshiab

Cov ntsiab lus Oxygen yog ib qho tseem ceeb yam ntxwv uas cuam tshuam rau lub cevmechanical zog, corrosion kuj, processability, thiab daim ntawv thov haumntawm cov tooj liab ntshiab (feem ntau txhais tau tias yog tooj liab nrog qhov tsawg kawg nkaus purity ntawm 99.3% -99.9%, piv txwv li, C11000, C10200). Nws cov teebmeem yog multifaceted thiab nyob ntawm seb cov pa oxygen concentration (feem ntau yog los ntawm<0.001% in oxygen-free copper to 0.02%–0.05% in regular pure copper) and service conditions:

① cuam tshuam rau cov cuab yeej cuab tam

Lub zog thiab Hardness: Oxygen acts as a weak alloying element in pure copper. A controlled oxygen content (0.02%–0.05%) slightly increases tensile strength (from ~220 MPa to ~240 MPa) and Brinell hardness (from ~65 HB to ~75 HB) compared to oxygen-free copper. This is because oxygen forms fine oxide inclusions (e.g., Cu₂O) that hinder dislocation movement during plastic deformation. However, excessive oxygen (>0.05%) ua rau coarse oxide hais, ua rau txo ductility (elongation txo los ntawm ~ 45% mus rau<30%) and toughness, making the material brittle and prone to cracking during bending, stamping, or welding.

Ductility thiab Formability: Tsawg oxygen cov ntsiab lus (<0.001%, as in oxygen-free copper) ensures exceptional ductility and cold workability. This allows the material to be drawn into ultra-fine wires (down to 0.01 mm diameter), rolled into thin foils (<0.01 mm thickness), or formed into complex shapes without fracture-critical for applications like electrical connectors and precision components.

② Kev cuam tshuam ntawm Corrosion Resistance

General Corrosion: Oxygen nws tus kheej tsis cuam tshuam qhov ntshiab tooj liab lub hauv paus corrosion kuj rau atmospheric tej yam kev mob, dej, los yog tsis yog -oxidizing acids (xws li dilute sulfuric acid). Txawm li cas los xij, oxide inclusions (Cu₂O) tuaj yeem ua tau raws li micro-galvanic hlwb hauv corrosive ib puag ncig (xws li dej hiav txwv, acidic daws), ua kom lub zos corrosion (pitting lossis crevice corrosion) thiab txo cov khoom siv lub neej.

Hydrogen Embrittlement Risk: Qhov teeb meem tseem ceeb tshaj plaws ntsig txog cov ntsiab lus oxygen yoghydrogen embrittlement (tseem hu ua "hydrogen disease"). When pure copper with high oxygen content (>0.02%) raug rau cov pa roj hydrogen los yog txo cov cua sov (xws li, thaum kho cua sov, vuam, lossis kev pabcuam hauv hydrogen- thaj chaw nplua nuj xws li cov nroj tsuag tshuaj), cov tshuaj tiv thaiv hauv qab no tshwm sim:

Cu2O + H2 → 2Cu + H2O

Cov dej vapor tsim ua rau lub siab sab hauv ntawm cov khoom, ua rau tawg, tawg, lossis kev puas tsuaj loj. Oxygen-dawb tooj liab (OFC) zam qhov kev pheej hmoo no vim nws cov ntsiab lus oxygen tsawg heev, ua rau nws tseem ceeb rau hydrogen- cov ntawv thov.

③ Qhov cuam tshuam rau kev ua tau zoo

Weldability: Oxygen- tooj liab dawb muaj qhov zoo tshaj plaws weldability (xws li, TIG, MIG, los yog brazing) vim nws tsis muaj oxide inclusions uas yuav ua rau porosity, slag tsim, los yog brittle weld pob qij txha. High-oxygen ntshiab tooj liab, los ntawm qhov sib txawv, yog qhov ua rau cov vuam tsis xws luag vim yog cov pa roj evolution los ntawm oxide decomposition, yuav tsum tau welding tsis nruj me ntsis (xws li, inert gas shielding) kom muaj kev sib koom ua ke.

Machineability: Oxygen- muaj cov tooj liab ntshiab muaj qhov ua tau zoo me ntsis dua li OFC, vim tias cov oxide suav nrog ua rau cov nti tsim thiab txo cov cuab yeej adhesion. Txawm li cas los xij, qhov txiaj ntsig no yog qhov me me piv rau kev ua lag luam ua lag luam -offs (xws li, txo cov ductility), yog li nws tsuas yog ua ntej rau qis - kev ntxhov siab, cov khoom siv machined.

④ Qhov cuam tshuam rau hluav taws xob thiab thermal conductivity

Pure copper is valued for its high electrical conductivity (~97–100% IACS) and thermal conductivity (~390 W/m·K). Oxygen content has a minimal impact on these properties when kept below 0.05%, as oxygen does not form solid solutions with copper but exists as discrete oxides. However, excessive oxygen (>0.05%) los yog cov oxide loj tuaj yeem tawg electrons thiab phonons, me ntsis txo cov conductivity (los ntawm ~ 2-5% IACS). Rau siab - kev siv hluav taws xob ua haujlwm (piv txwv li, fais fab cables, transformer windings), oxygen- tooj liab dawb yog qhov zoo dua los ua kom muaj kev ua tau zoo.

2. Qhov sib txawv ntawm Oxygen-Tooj liab dawb (OFC) thiab tooj liab ntshiab

Lo lus "ntshiab tooj liab" yog ib pawg dav, thaum "oxygen-dawb tooj liab (OFC)" yog ib qhosiab -purity subcategoryntawm ntshiab tooj liab nrog nruj oxygen cov ntsiab lus txwv. Cov kev sib txawv tseem ceeb tau sau tseg hauv qab no, nrog rau kev tsom mus rau cov txheej txheem kev ua haujlwm thiab kev siv cuam tshuam rau kev lag luam thiab kev lag luam scenarios:

Sib piv Dimension	Oxygen-Ntshav tooj liab (OFC)	Tsis tu ncua ntshiab tooj liab
Cov ntsiab lus Oxygen	Tsawg dua lossis sib npaug li 0.001% (10 ppm) rau cov qib hwm (piv txwv li, C10200, C10100); Tsawg dua lossis sib npaug li 0.003% (30 ppm) rau tus qauv OFC.	Feem ntau 0.02% - 0.05% (200-500 ppm); qee qhov qis- qib oxygen (piv txwv li, C11000) muaj 0.01%–0.02%.
Tshuaj Purity	Ntau dua lossis sib npaug rau 99.99% Cu (tsis suav cov pa oxygen), nrog ultra- qib impurity qis (Fe, Pb, S Tsawg dua lossis sib npaug li 0.001%).	99.3% -99.9% Cu, nrog cov ntsiab lus impurity siab dua (Fe Tsawg dua lossis sib npaug rau 0.05%, Pb Tsawg dua lossis sib npaug rau 0.01%).
Mechanical Properties	- Tensile zog: ~ 220–230 MPa - Ntev: ~ 45–50% - Cov ductility zoo heev thiab ua haujlwm txias.	- Tensile zog: ~ 230–250 MPa (siab dua me ntsis) - Elongation: ~ 35–40% (qis dua) - Nruab nrab ductility; Nws yooj yim rau brittleness ntawm cov pa oxygen siab.
Corrosion Resistance	- Kev tiv thaiv rau hydrogen embrittlement. - Kev tiv thaiv zoo tshaj plaws rau pitting / crevice corrosion vim muaj oxides tsawg.	- Kev pheej hmoo siab ntawm hydrogen embrittlement hauv kev txo qis ib puag ncig. - Ua rau muaj kev cuam tshuam hauv cheeb tsam corrosion los ntawm oxide inclusions.
Weldability/Brazability	Zoo heev -tsis muaj porosity lossis slag; haum rau siab -kev ncaj ncees pob qij txha (piv txwv li, aerospace, khoom siv kho mob).	Tsis zoo-nws yooj yim rau weld defects; yuav tsum tau inert gas shielding thiab post-weld tshav kub kho.
Hluav taws xob / Thermal conductivity	Qhov siab tshaj plaws conductivity (~ 99-101% IACS; ~ 395 W / m·K) vim muaj siab purity thiab qis oxides.	Tsawg conductivity (~ 97-98% IACS; ~ 385 W / m·K) vim impurities / oxides.
Cov qauv tseem ceeb	ASTM B152 (daim ntawv / phaj), ASTM B187 (hlau), JIS H3100 (C10200), GB / T 5231 (TU1 / TU2).	ASTM B152 (C11000), JIS H3100 (C1100), GB / T 5231 (T2 / T3).
Tej kev siv	- High-kev ua tau zoo hluav taws xob: Ultra- cov xov hlau zoo, transformer windings, busbars. - Hydrogen- ib puag ncig nplua nuj: Tshuaj reactors, khoom siv cryogenic. - Precision Cheebtsam: Aerospace qhov chaw, khoom siv kho mob, tshuab nqus tsev.	- General hluav taws xob: fais fab cables, hauv tsev thaiv, hluav taws xob enclosures. - Cov kav dej / cua kub pauv: Cov kav dej, lub tshuab hluav taws xob, cov kav dej kub. - Tsawg- cov ntsiab lus kev ntxhov siab: Cov khoom siv fasteners, kho vajtse, cov khoom siv kho kom zoo nkauj.
Nqi thiab Muaj	Cov nqi siab dua (20-50% ntau dua li cov tooj liab ntshiab) vim cov txheej txheem ua kom zoo dua qub (xws li electrolytic refining, nqus casting).	Tus nqi qis dua; dav muaj nyob rau hauv cov ntaub ntawv txheem (cov ntawv, rods, kav) rau loj ntau lawm.

Core Distinction Summary

Txhais Scope: OFC yog hom tooj liab ntshiab, tab sis tsis yog tag nrho cov tooj liab ntshiab yog OFC -OFC sawv cev rau qhov siab tshaj -purity, qis tshaj - oxygen subset.

Qhov txiaj ntsig tseem ceeb ntawm OFC: Kev tiv thaiv rau hydrogen embrittlement thiab superior processability (ductility, weldability), ua rau nws haum rau siab -kev cia siab, hnyav- ib puag ncig daim ntaub ntawv.

Tus nqi -Kev Ua Lag Luam Kev Ua Haujlwm- tawm: Cov tooj liab ntshiab tsis tu ncua yog nyiam rau tus nqi-rhiab heev, tsis yog- daim ntawv thov tseem ceeb (piv txwv li, kev xaim dav dav, kav dej) qhov twg hydrogen raug tsis muaj kev pheej hmoo, thaum OFC yog qhov yuav tsum tau ua rau siab- thev naus laus zis, kev nyab xeeb{5}} xwm txheej tseem ceeb (piv txwv li, aerospace, kho mob, hydrogen zog).