Ua kom zoo qis - kub kev kub heev ntawm cov ciav hlau hauv lub teb chaws thiab kev tiv thaiv brittle fracture thaum lub caij ntuj no
- Yuav ua li cas txhawm rau txhim kho qhov qis - kub tougness ntawm GB 60kg / Mail / CM REXUS) ntawm kev hloov kho kev haum, thiab dab tsi yog qhov kev hloov kho kev sib haum xeeb?
Tsis txaus nruj ua rau 2 britle pob txha lov / xyoo. Hloov kho: ① Ntxiv 0.3% NI (Toughness → 35j / cmo); ② Tswj C 0.65-0.70% (txo qis zog); ‡ Kho MN 1.2-1.4%. Yuav tsum muaj: C 0.65-0.70%, ni 1.2%, ni 0.3035-0.35%, ua haujlwm GB / T 2585. Tshwm sim:
- Yuav ua li cas thiaj ua kom thiaj ua kom tiav cov txheej txheem quenching ntawm GB 75kg / m tsheb ciav hlau los daws cov txheej quenched spaling (5j / cm / cms saws), thiab dab tsi yog quenching parameter muaj?
Spalling txo 10% chaw tiv tauj. Kev ua kom zoo: ① 920 → 890 Degree Cua Kub (Zam Kom Txhob Cia Cov nplej); ② 3 → 5min rwb thaiv tsev (kub me ntsis); ③ 25 → 20 qib / s cua txias (pos txias txias). Cov tsis muaj: 880- 900 degree, 4-6min, 18-22℃/ s. Qhov tshwm sim: Tsis muaj spalling, 32J / CM² Toughness ntawm -30 degree, haum hnyav-kev ua haujlwm alpine.
- Yuav ua li cas tiv thaiv GB Rail Cracture ntawm kev tsheb ciav hlau kub hauv lub caij ntuj no, thiab cov ntsiab lus saib xyuas, chaw zoo, thiab cov lus teb?
Kev Ntsuam Xyuas: i Qhov kub thiab txias Sensors (-40 Qib ~ 80 Qib) Txhua 2km (1km rau Curs); Cov ntaub ntawv wireless sib kis tau. Harbolds: tsawg dua los yog sib npaug ntawm -25 Qib (Theem 1), tsawg dua lossis sib npaug ntawm -30℃(qib 2). Cov lus teb: ① Qib 1: 3 Kev Tshuaj Xyuas / Hnub; Qib 2: Kev Ceev Ceev Npaum 80kM / h, Txau 3μm nruj heev tus neeg sawv cev.
- Dab tsi yog qhov qis - kub kev sib txawv ntawm cov kab sib tw GB ntawm Northatch / EG, Central Tuam Rail hauv Northeast)?
Qhov sib txawv: ① Northeast (-30 degree): ntau dua lossis sib npaug nrog 30j / cm² (-30 degree); ② Central (-15 degree): ntau dua los yog sib npaug rau 28j / cmy (-20 degree); ③ South (0 Degree): Ntau dua lossis sib npaug nrog 25J / CM² (-10 degree). Mismatch: 0.5 pob txha (100km, 3 lab RMB hloov tus nqi, cuam tshuam rau kev ua haujlwm.
- Dab tsi yog cov qauv piv txwv / qauv rau GB tsheb ciav hlau tsawg - kub ua tau, thiab yuav ua li cas los yog sib npaug ntawm 30j / cm²) ntawm -30 degree?
Cov hau kev: ① 3 tus ntsia / batch, 10 × 10 × 55Mm kuaj; - 30℃× 2h Charpy Kuaj; ③ HB280-320 Hardness. Cov Qauv: Loj dua los yog sib npaug rau 30J / CM², HB280-320. Reasce: ① 580℃× 2h tempering; Kev rov ntsuam xyuas dua ntau dua lossis sib npaug ntawm 30j / cm ²; Grott unqualified bears txwv tsis pub tawm lub Hoobkas.