穿轧,过孔的坯料;
By controlling the cooling speed of pierced billet after hot piercing, the DP-structure F+ B could be obtained. The times of annealing the process of cold, drawing could be decreased by 50%.
控制热穿孔后荒管的冷却速度可获得F+B的双相组织,并减少冷拔过程中50%的退火次数。
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