Nkɛntɛnso a Carbon Ahorow a Ɛwɔ Dade So Nya
Feb 25, 2026
Carbon yɛ nneɛma a ɛho hia sen biara a wɔde fra dade mu no mu biako, na emu nsɛm no ka dade no microstructure, mfiridwuma su, ne sɛnea wɔyɛ no tẽẽ. Nea edidi so yi yɛ nkɛntɛnso a carbon ahorow a ɛwɔ mu no nya wɔ dade su so no ho nhwehwɛmu a ɛkɔ akyiri:
1. Nkɛntɛnso a carbon a ɛwɔ mu nya wɔ dade no microstructure so
Dade no microstructure titiriw no yɛ ferrite ( -Fe), cementite (Fe3C), pearlite (ferrite ne cementite a wɔde afrafra a ɛyɛ ntoatoaso), austenite ( -Fe, ɔhyew a ɛkorɔn-ɔhyew fã), ne martensite (afã a ɛyɛ den bere a wɔadum akyi). Nsakrae a ɛbɛba wɔ carbon a ɛwɔ mu mu no bɛsesa sɛnea saa nhyehyɛe ahorow yi te:
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Dade a ɛyɛ carbon a ɛba fam-(C < 0.25%): |
Ferrite titiriw, a pearlite kakraa bi na ɛwɔ mu, plasticity pa nanso ahoɔden sua. |
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Medium-carbon dadeɛ (0.25% Ennu anaasɛ ɛne C yɛ pɛ Ennu anaasɛ ɛyɛ pɛ 0.6%): |
Pearlite dodow kɔ soro, na ferrite dodow so tew, na ɛka ahoɔden ne nea ɛyɛ den bom. |
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Dade a ɛyɛ carbon a ɛkorɔn-(C > 0.6%): |
Pearlite na ɛhyɛ so, na sɛ carbon a ɛwɔ mu no dɔɔso a, reticular cementite pue, a ɛyɛ den kɛse nanso ɛyɛ mmerɛw kɛse. |
2. Nkɛntɛnso a carbon a ɛwɔ mu nya wɔ mfiri ahorow so
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Carbon dodow a ɛwɔ mu |
Dwumadi a wɔtaa yɛ |
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< 0.1% |
Ɛyɛ mmerɛw yiye, ɛyɛ plastic kɛse (te sɛ mfiridwuma mu dade a ɛho tew), ɛnyɛ den sɛ wɔbɛyɛ ho adwuma na wɔayɛ no sɛnea ɛte, nanso ahoɔden sua (σ1 ≈ 200 MPa). |
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0.1%~0.25% |
Low-carbon steel (te sɛ Q235), plasticity pa ne weldability, a wɔde di dwuma wɔ adansi, kar mprɛte, ne nea ɛkeka ho. |
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0.3%~0.5% |
Medium-carbon steel (te sɛ 45 steel), ahoɔden ne toughness a ɛkari pɛ, a wɔde di dwuma ma structure components te sɛ shafts, gears, ne nea ɛkeka ho. |
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0.6%~1.0% |
Carbon dade a ɛkorɔn- (te sɛ T8, T10), ɛyɛ den yiye (HRC 60+), nanso ɛyɛ brittleness kɛse, wɔde yɛ nnwinnade, spring, ne nea ɛkeka ho. |
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>1.0% |
Ultra-high-carbon steel, a ɛyɛ den yiye nanso ɛyɛ mmerɛw yiye, hwehwɛ ɔhyew soronko (te sɛ spheroidizing annealing) na ama mfiri a wɔde yɛ adwuma no atu mpɔn. |
Ahoɔden ne denden: Bere a carbon a ɛwɔ mu no kɔ soro no, semɛnte no fã kɔ soro, na dade no den ne ahoɔden a ɛtwetwe (σ1) kɔ soro kɛse, nanso plasticity (elongation δ) ne toughness (impact energy AKV) so tew.
Brittle transition: High-carbon steel taa yɛ brittle fracture wɔ ɔhyew a ɛba fam anaasɛ impact loads ase.
3. Synergistic nkɛntɛnso a carbon ne nneɛma afoforo nya
Manganese (Mn): Ebetumi abrɛ ɔhaw a sulfur de ba no ase na ama ayɛ den.
Silicon (Si): Ɛhyɛ ferrite den, nanso ɛtew ductility so.
Alloy steel: Ɛdenam nneɛma te sɛ Cr, Ni, Mo, ne nea ɛkeka ho a wɔde ka ho so no, wobetumi anya ahoɔden ne denden kɛse wɔ carbon a ɛba fam mu