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Solid wheel for rail vehicles comprising isothermally treated bainitic cast iron with spheroidal graphite and microstructure containing austenite
Solid wheel for rail vehicles comprising isothermally treated bainitic cast iron with spheroidal graphite and microstructure containing austenite
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机译:用于轨道车辆的实心轮,其包括经等温处理的球状石墨贝氏体铸铁和含有奥氏体的组织
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摘要
Melt components comprise (by mass%): 3.4-3.6 carbon (C), 2.2-2.4 Si, 0.6-0.8 copper (Cu), 0.6-0.8 nickel (Ni), 0.2-0.3 molybdenum (Mo), 0.035-0.05 magnesium (Mg), 0.3 manganese (Mn), 0.03 phosphorus (P), 0.01 sulphur (S) and 0.05 chromium (Cr) (maximum). [Cu]+[Ni] = 1.2-1.6 wt.%. [Cu]+[Ni]+[Mo]+[Mn] = 1.4-2.2 wt.% in total. The cast components are annealed austenitically for 3-4 hours at 860-900[deg]C, followed by isothermal soaking in a salt bath at 350-400[deg]C for 3-4 hours. Subsequent air cooling to room temperature follows.
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