将双辊铸轧Cr12钢薄板于1 000℃固溶,再采用炉冷和水淬两种方式冷却至室温,分别获得了多边形铁素体和板条马氏体两种组织,再经过相同冷轧和退火工艺,得到了两种成品板.经拉伸试验测定,水淬板的深冲性和抗皱性均强于炉冷板.组织分析发现:热处理后,水淬板内马氏体板块明显细小于炉冷板内铁素体晶粒;冷轧后,水淬板内板块间界演变为较高密度形变晶界;这提高了其退火过程中再结晶晶粒形核密度、细化了退火组织、抑制了晶粒簇形成,使水淬板起皱程度弱于炉冷板.织构分析发现:由于基体塑性变形能力较强,水淬板冷轧后得到的α织构强度更高且峰值距{111}＜110＞更近;退火后,其得到的γ织构强度更高且沿γ取向线分布更均匀,而炉冷板内还有高斯织构形成,于是水淬板获得了较高γm值和较低△γ值.
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