Ubuchwepheshe bokwelashwa okuthuthukile okuthuthukile kokuthwala ukukhiqiza | Shangdong yueheng

Ukwelashwa kokushisa kubusa ukuthwala amamethrikhi okubandakanya ukukhathala kokuxhumana (ukukala okulinganiselwe), ukugqoka ukugqoka, nokuqina okuyisici. Ukukhiqizwa kwanamuhla kudinga ± 3 ° C lokushisa lokulawula na- Inqubo yenqubo ye-CPK≥1.33. Ukulandelana komgogodla: Ukuguquguquka kwe-annealing → ukucima phansi → Ukushisa okushisa okuphansi.

1.I-asperiodizing anvealing

Injongo: Qeda amanethiwekhi e-Carbide (≤Grade 2), yenza i-Pearlite ye-homogeneous (i-carbide sphermealization ≥90%, ububanzi 0.2-0.6μm), Hardenenness 179-207 HB. Protocol esitezi ezimbili:

• Isigaba 1: 790 ± 10 ° C × 2-4h austonitization (okuyingxenye ye-carbide disolution)
• Isigaba 2: 710 ± 10 ° C × 4-6h Colloing (≤20 ° C / H) kuya ku-650 ° C, Ijika elipholile elilawulwayokuvimbela ukuhanjiswa kwemvula kwe-coarse carbide

Ipharamitha ebucayi: Usayizi wokusanhlamvu 7-8 (ASTM E112)

2.Ququla inqubo

Ukugeza Kasawoti (Bacl₂: KCL = 3: 1) noma umkhathi wokuvikela (N₂-Ch₃oh, oxygen Probe ≤0.5%):

• I-GCR15 Steel: 845 ± 5 ° C × 2 Isikhathi × 0.8-1.2 Min / MM)
• Ukupholisa Kinetics: 800 → 500 ° C okupholile isilinganiso ≥45 ° C / S (Gwema ukwakheka kwe-Ferrite), ukupholisa kancane kancane ngaphansi kwama-300 ° C
• Ithagethi: I-Cryptocrystalline Martensite (> 95%, ubude benaliti ≤0.02mm) + I-Austan Retuden (<5%)

3.Ukushisa okushisa ngokushisa

I-150-180 ° C × 2-4h (± 3 ° C) in I-Contnection Air Funector:

• ε-FE₂.₄c Imvula eMfelamuni, Hardeness 61-65 HRC
• Ukuwohloka kwe-Austomite:> 80% (XRD aqinisekisiwe)
• Imodeli Yokusiza Ukuxineka: Σ_residaal = Σ_inidial × E ^ (- 0.02t) (T emahoreni)

Izinqubo ze-4.Special & Innovations

• I-Ausmpempering: 230 ± 10 ° C usawoti okugeza × 2h → I-Baini Teman (58-62 HRC, KCV050j / CM²)
• I-cryo ejulile: -70 ° C × 4HH (i-liquid nitrogen spray), Aucen → Inguquko yeMartensite> 95%
• I-Laser Harning: 1064Nm wavethth udala ukujula kwecala le-0.3mm, ↑ 40% Thinta ukukhathala impilo yempilo

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