Grain refinement technique of refractory low alloy steel

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ÎÄÕÂÒ³Â룺157 - 161

Key words£ºgrain refinement technique£» cyclic heat treatment£» deformation induced phase transformation

Abstract: Grain refinement by cyclic heat treatment and deformation induced transformation technique of the refractory low-alloy steel and 12Cr1MoV was studied. Three cyclic heat treatments and a single-pass hot rolling process by a Gleeble-1500 system were performed. The results show that the austenite grain sizes are affected by the cyclic quenching number, quencher, heating temperature before rolling, deforming tem- perature, strain and strain rate. The ferrite grain sizes are affected by the austenite grain refinement, deforming temperature, strain and the quenching cooling rate. The ferrite with grain size of around 3¤@¦Ìm may be produced by the technique.