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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 Ti N、Ti C、Ti S、Ti4C2 S2 及 Mn S等第二相在奥氏体中的平衡析出规律。对 2 0 Cr Mn Ti钢种成分的计算结果表明 :该类含钛钢中的析出相主要为 Ti Cy N1 - y、Ti4C2 S2 及 Mn S,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 Ti4C2 S2等粒子是钢在奥氏体区高温塑性恶化的原因之一。
Based on the mutual dissolution between precipitated phases in titanium-containing steels, a thermodynamic calculation model was established and the effects of the second phase of TiN, TiC, TiS, Ti4C2 S2 and MnS in low carbon Ti- The balance of body precipitation rules. The calculation results of the composition of 20 Cr Mn Ti steel show that the precipitates in this kind of Ti-bearing steels are Ti Cy N1 - y, Ti4C2 S2 and Mn S, and the fluctuation of titanium and sulfur content in the specification range can lead to The order and amount of their precipitates changed significantly. Experimental studies on the steel showed that during the process of high temperature cooling, fine intergranular particles such as Ti4C2 S2 were the reason for the plasticity of steel in the austenite zone at high temperature one.