研究了弛豫-析出控制相变(RPC)技术生产的细晶低碳贝氏体钢回火后组织与性能的变化,并与控轧后空冷(AC)以及传统的再加热淬火工艺(RQ)得到的钢板的回火组织及性能进行了比较.采用RPC工艺得到的钢板经500℃～700℃回火1h后,随回火温度升高呈现软化-硬化-再软化的变化规律,采用AC工艺得到的钢板回火后硬度和强度的反复变化不明显,而经过RQ处理后的钢板随回火温度升高强度和硬度则单调下降.RPC和RQ钢板回火前的组织均为板条状贝氏体和少量粒贝的复合组织.回火后RPC钢板组织变化不明显,而RQ钢板随回火温度的升高板条很快消失,最终演变成多边形铁素体.实验结果表明,RPC钢板具有良好的热稳定性.
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