The invention provides a steel material, a brake beam and a preparation method of the brake beam. The steel material comprises Fe, C and trace elements, wherein C accounts for 0.15-0.25% of the total weight of the steel material and the trace elements comprise 0.30-0.55% of Si, 1.30-1.80% of Mn, 0.015-0.080% of Al, 0.04-0.55% of Cu, 0-0.30% of Mo and 0.02-0.2% of V. By adding Al and V, the grains are conducive to being refined, and aluminum nitride and carbonitride which are fine and in dispersed distribution are formed in the steel material. Aluminum nitride and carbonitride together can prevent growth of austenite grains and thus the qualified rate of the brake beam is increased during the preparation process of the brake beam. The air cooling and tempering processes are not needed when the brake beam is prepared from the steel material.
Steel material, brake beam and preparation method of brake beam
08.04.2015
Patent
Elektronische Ressource
Englisch
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