Effect of heat treatment on mechanical properties of SM570 steel for forklift beam

doi:10.13251/j.issn.0254-6051.2020.11.040

Abstract

Abstract: Effect of heat treatments (normalizing, quenching and tempering) on the mechanical properties of SM570 steel for forklift beam was experimental studied contrastively. The results show that the beam with effective thickness of 40 mm can fully meet the requirements of mechanical properties only after 900 ℃×3 h water quenching and 550 ℃×4 h tempering. The tensile strength and yield strength of the specimens after normalizing are both low, especially the yield strength is much lower than the requirement. If the SM570 steel for forklift beam is to be delivered at the normalized state and both yield strength and yield ratio are to be improved, fine grain strengthening must be carried out by microalloying in addition to the solid solution strengthening by Si and Mn.

Key words: SM570 steel, forklift beam, heat treatment, mechanical properties, microalloying

CLC Number:

TG142.1

Xiao Jieliang, Huang Cheng, Ma Xianyin. Effect of heat treatment on mechanical properties of SM570 steel for forklift beam[J]. Heat Treatment of Metals, 2020, 45(11): 210-213.

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