Optimize gradyan dite a ak amelyore rezistans mete Railhead Tread nan ray estanda nasyonal yo.
- Ki jan yo bati gradyan dite pou GB 60kg/m tren (3.5mm mete/ane) atravè trempe gradyan, ak ki estanda pòs-optimize yo?
Inifòm dite lakòz 2.8mm / ane mete. Optimizasyon: ① Doub-tranchman zòn (0-5mm:920 degre ×15s, 30 degre /s; 5-15mm:860 degre ×20s, 20 degre /s); ② 220 degre × 40min tanperaman. Estanda: Sifas HB380-420, sub-sifas HB320-360, 12-14mm pwofondè gradyan, Mwens pase oswa egal a 1.8mm mete / ane. Rezilta: 12 mwa sik fanm k'ap pile, 40% pi ba pri, sere 25t tren.
- Ki jan yo ajiste paramèt trempe pou amelyore sub-dite sifas GB 75kg/m tren (HB300, 5mm² depaman/ane) pou chaj 30t, e ki kondisyon yo?
Ba sub-dite sifas ki lakòz kouch kouch. Ajisteman: ① Pwolonje sub-sifas chofaj a 25s; ② Diminye to refwadisman a 18 degre / s; ③ Mwens pase oswa egal a 60HB diferans gradyan. Egzijans: Sou-sifas HB320-360, fòs lyezon Pi gran pase oswa egal a 80MPa, Mwens pase oswa egal a 1mm² eklatman/ane, Pi gwo pase oswa egal a 8 ane lavi. Rezilta: 80% mwens echèk defo, adapte 30t lou-bwote.
- Ki metòd tès gradyan dite / estanda pou ray GB yo, ak kouman yo retravay ray 75kg / m ak pwofondè gradyan 10mm (12-15mm)?
Metòd tès: ① Mezi dite chak 2mm (tèstè Leeb); ② Analiz metalografik; ③ 25kN × 100k sik mete tès. Estanda: 60kg/m (12-14mm), 75kg/m (13-15mm), 30-60HB diferans, mwens pase oswa egal a 0.8mm mete/100k sik. Retravay: ① Re-pase sub-sifas (860 degre ×25s); ② Re-tès pwofondè; ③ Bouyon ray fann yo.
- Ki diferans ki genyen gradyan dite pou ray GB nan 25t/30t aks chaj/òdinè/lou-liy transpò, e kisa k ap pase ak dezakò?
Diferans: ① 25t òdinè: 12-14mm, HB380-400; ② 30t lou-bwote: 14-15mm, HB400-420; ③ 25t pasaje: 13-14mm, HB390-410. Dezakò: lou-bwote ak paramèt òdinè: 4mm mete / 6 mwa, 15% spelling, 500k RMB / 100km pri.
- Ki jan yo matche ak gradyan dite ak wou-estrès kontak ray pou ray GB, ak sa k ap pase ak matche pòv?
Matche: ① 25t: Sifas HB380-390 (420→380MPa); ② 30t: 15mm pwofondè (dispèsyon estrès); ③ Simulation-optimize koub. Estanda: Mwens pase oswa egal a 400MPa (25t) / 420MPa (30t), Pi gran pase oswa egal a 28mm² zòn, Mwens pase oswa egal a 0.5% to krak / ane. Pòv matche: HB450 sifas: 480MPa estrès, 2mm krak / 3 mwa, 30% pi wo pri rivork.