基于含钛钢中各析出相之间的相互溶解现象,建立热力学计算模型,研究了低碳含钛钢中的TiN、TiC、TiS、Ti4C2S2及MnS等第二相在奥氏体中的平衡析出规律.对20CrMnTi钢种成分的计算结果表明:该类含钛钢中的析出相主要为TiCyN1-y、Ti4C2S2及MnS,且钛和硫含量在规格范围内的波动可导致它们析出的次序和数量发生明显的变化,对该钢种的实验研究表明,高温冷却过程中,脱溶析出的细小的沿晶Ti4C2S2等粒子是钢在奥氏体区高温塑性恶化的原因之一.
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