Teknụzụ ọgwụgwọ okpomọkụ dị elu maka nrụpụta nrụpụta | Shangdong Yueheng

Ọgwụgwọ okpomọkụ na-achịkwa metrik arụmọrụ gụnyere ndụ ike ọgwụgwụ kọntaktị (ọnụọgụ L10), nguzogide iyi, na nkwụsi ike akụkụ. Mmepụta ọgbara ọhụrụ chọrọ ± 3°C njikwa okpomọkụ na ikike usoro CPK≥1.33. Usoro isi: Spheroidizing Annealing → Quenching → Okpomọkụ dị ala → Nkwụsi ike.

1.Spheroidizing Annealing

Ebumnuche: Wepụ netwọkụ carbide adịgboroja (≤Grade 2), na-etolite pearlite spheroidized (carbide spheroidization ≥90%, dayameta 0.2-0.6μm), ike 179-207 HB. Usoro protocol abụọ:

• Nkeji 1: 790± 10°C × 2-4h austenitization (mgbasa obere carbide)
• Nkeji 2: 710± 10°C × 4-6h jiri nwayọ nwayọ (≤20°C/h) ruo 650°C, usoro jụrụ oyi na-achịkwana-egbochi oke mmiri ozuzo carbide

Oke dị egwuNha ọka 7-8 (ASTM E112)

2.Quenching Usoro

Bath bath (BaCl₂: KCl=3: 1) ma ọ bụ ikuku nchebe (N₂-CH₃OH, nyocha oxygen ≤0.5%):

• GCr15 ígwè: 845± 5°C × oge ihe (oke mgbidi × 0.8-1.2 min/mm)
• Kinetics jụrụ oyi: 800→500°C jụrụ oyi ≥45°C/s (zere ferrite guzobe), nwayọọ jụrụ n'okpuru 300°C
• Ebumnuche: Cryptocrystalline martensite (> 95%, ogologo agịga ≤0.02mm) + austenite ejigidere (<5%)

3.Low-okpomọkụ okpomọkụ

150-180°C × 2-4h (± 3°C) n'ime mmanye convection ikuku ọkụ:

• ε-Fe₂.₄C mmiri ozuzo na martensite, ike ike 61-65 HRC
• Nbibi nke Austenite:> 80% (Achọpụtara XRD)
• Ụdị enyemaka nchekasị: σ_residual=σ_initial×e^(-0.02t) (t n'ime awa)

4.Special Usoro & ihe ọhụrụ

• Na-akpali akpali: 230± 10°C nnu bath × 2h → ala bainite (58-62 HRC, KCV≥50J/cm²)
• Deep Cryo: -70°C × 4h (mmiri nitrogen ịgba), austenite → martensite mgbanwe> 95%
• Laser Hardening: 1064nm wavelength na-emepụta 0.3mm ikpe omimi, ↑40% kọntaktị ndụ ike ọgwụgwụ

Usoro mmesi obi ike: