开轧温度对含铌微合金钢粗轧后析出相影响的模拟

材料热处理学报, 2011, 32(10): 159-162.

开轧温度对含铌微合金钢粗轧后析出相影响的模拟

吴晓瑜 ^1, , 何燕霖 ^2, , 林大为 ^3, , 李麟 ^4,

1.上海大学材料科学与工程学院,上海200072

2.上海大学材料科学与工程学院,上海200072

3.上海大学材料科学与工程学院,上海200072

4.上海大学材料科学与工程学院,上海200072

基金项目: 国家自然科学重点基金资助项目(50971137)

关键词：热/力模拟实验技术 , 开轧温度 , 应变诱导析出

Simulation on effect of starting rolling temperature on precipitation in a Nb microalloyed steel after rough rolling

Keywords： thermal process modeling technique , starting rolling temperature , strain induced precipitation

为了优化热轧工艺降低能耗,采用热/力模拟实验技术分析了开轧温度对铌微合金钢多道次高温变形后性能的影响,并通过应力松弛实验对Nb（CN）的应变诱导析出行为进行了研究。结果表明：当开轧温度由1141℃降低为1111℃时,基体中Nb（CN）的析出量明显增加,由于析出相粒子的析出强化作用,试样的硬度和强度相应提高。

Influence of start rolling temperature on properties of multi-pass high temperature compression deformation for Nb microalloy steel was studied by a thermo-mechanical simulator in order to rationalize the hot-rolling schedule of microalloy steel.The strain induced precipitation behavior of Nb（CN） was also studied by stress relaxation method.The results showed that precipitation behaviour of Nb（CN） was affected by start rolling temperature.When the start rolling temperature reduced from 1141 ℃ to 1111 ℃,the volume fraction of Nb（CN） precipitates increased and hardness and strength of the steel after hot deforming increased correspondingly,which resulted from precipitation hardening.

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