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中文摘要：
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rm值和较低Δr值。
英文摘要：
Twin-roll strip casting Cr12 steel sheets were solution treated at 1000℃ and then furnace-cooled（FC） and water-quenched（WQ） to room temperature in two ways,to obtain polygonal ferrite and lath martensite respectively.After the same cold rolling and annealing processes,two kinds of product sheets were obtained.Detected by tensile experiment,WQ sheet exhibited stronger deep drawability and ridging resistance than FC sheet.Microstructural analysis found that the martensitic packets in WQ sheet were obviously finer than ferrite grains in FC sheet after thermal treatment.The packet boundaries transformed into high-density grain boundaries after cold rolling.That increased nucleation density,refined recrystallized microstructure and suppressed the occurrence of grain colonies during annealing.So WQ sheet expressed weaker ridges than FC sheet.Textural analysis found that because of higher plastic deformation ability of the matrix,WQ sheet obtained stronger α-fiber texture with peak orientation closer to {111}110 after cold rolling and further obtained stronger and more homogeneous γ-fiber texture after annealing than FC sheet.A Goss texture also formed in FC sheet.So WQ sheet expressed higher rm value and lower Δr value than FC sheet.
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