Hangarau Hangarau Whakawera Whakawera Mo te Whakangao Whakaputa | Shangdong Yueheng

Ko te maimoatanga wera ka whakahaere i te kawe i nga inenga mahi tae atu ki te ora o te ngenge whakapā (whakatauranga L10), te aukati kakahu, me te pumau o te rahi. Ko nga mahi hou e hiahiatia ana ±3°C te mana pāmahana a te kaha tukanga CPK≥1.33. Te raupapa matua: Spheroidizing Annealing → Quenching → Haka-Pamahana Tempering → Stabilization.

1.Spheroidizing Annealing

Whaainga: Whakamutua te hanga i nga whatunga carbide (≤Grade 2), te hanga i te pearlite spheroidized homogeneous (carbide spheroidization ≥90%, te diameter 0.2-0.6μm), te pakeke 179-207 HB. Kawa-waahi e rua:

• Wāhanga 1: 790±10°C × 2-4h austenitization (waahanga carbide wehenga)
• Wāhanga 2: 710±10°C × 4-6h mātao pōturi (≤20°C/h) ki te 650°C, ānau whakamahana manaka aukati i te rerenga carbide nui

Tawhā arohaehae: Rahi witi 7-8 (ASTM E112)

2.Tukanga Quenching

Te pati tote (BaCl₂:KCl=3:1) te hau whakamarumaru ranei (N₂-CH₃OH, te tirotiro hāora ≤0.5%):

• GCr15 maitai: 845±5°C × tauwehe wa (te matotoru pakitara × 0.8-1.2 min/mm)
• Nga mahi whakamatao: 800→500°C reiti whakamahana ≥45°C/s (kaore i te hanga ferrite), puhoi te whakamahana i raro i te 300°C
• Whainga: Cryptocrystalline martensite (>95%, te roa o te ngira ≤0.02mm) + austenite pupuri (<5%)

3.Hakaiti-Tempering Tempering

150-180°C × 2-4h (±3°C) roto oumu hau convection kaha:

• ε-Fe₂.₄C rerenga i roto i te martensite, pakeke 61-65 HRC
• Te pirau Austenite: >80% (XRD manatoko)
• Tauira whakaora ahotea: σ_toenga=σ_initial×e^(-0.02t) (t i nga haora)

4. Nga Tukatuka Motuhake & Nga Whakahoutanga

• Austempering: 230±10°C pati tote × 2h → bainite raro (58-62 HRC, KCV≥50J/cm²)
• Te tangi hohonu: -70°C × 4h (wai hauota rehu), austenite→martensite panoni>95%
• Whakapakeke Taiaho: 1064nm roangaru hanga 0.3mm hōhonu take, ↑40% whakapā rohirohi ora

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