Open AccessRESEARCH ON MATERIAL FLOW-STRESS BEHAVIOR AND THE DIE-FORGING PROCESS FOR FORGED-STEEL BRAKE DISCS FOR HIGH-SPEED TRAINS
Author(s) -
LI Zhen-hong,
Chenxing Zhang,
Chenyu Wang,
Yingna Huang
Publication year - 2021
Publication title -
materiali in tehnologije
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.27
H-Index - 25
eISSN - 1580-3414
pISSN - 1580-2949
DOI - 10.17222/mit.2021.237
Subject(s) - forging , die (integrated circuit) , materials science , brake , flow stress , finite element method , stress (linguistics) , forming processes , process (computing) , mechanical engineering , flow (mathematics) , groove (engineering) , flash (photography) , train , computer simulation , metallurgy , structural engineering , composite material , engineering , mechanics , strain rate , computer science , simulation , physics , visual arts , cartography , geography , operating system , art , linguistics , philosophy
Due to the large size and complicated features, the brake discs of high-speed trains are difficult to forge, so a reasonable design of the process and the die parameter are prerequisites for successful forming. The flow stress of 23CrNiMoV, a forged-steel brake disc material for high-speed trains, was investigated by a uniaxial compression experiment on a Gleeble 1500 test machine. Based on the obtained flow-stress data, a series of numerical simulation analyses of the die forging of high-speed-train brake discs were carried out by using finite-element software. The effects of forging temperature, flash groove parameters and forming speed on the flow filling, forming load and temperature change of metal during die forging were studied. The simulation results were optimized and better process parameters were obtained. Based on the obtained process parameters, the simulation of the forming process was completed and a better forming quality was obtained.