Effect of V-Ti Addition on Microstructure Evolution and Mechanical Properties of Hot-Rolled Transformation-Induced Plasticity Steel
Effect of V-Ti Addition on Microstructure Evolution and Mechanical Properties of Hot-Rolled Transformation-Induced Plasticity Steel
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V-Ti添加对热轧相变诱发塑性钢组织演变及力学性能的影响
DOI：
10.1007/s40195-018-0796-3
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Zhu Miao Yong
中科院分区：
文献类型：
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作者：
Yu Hai Cun;Cai Zhao Zhen;Fu Gui Qin;Zhu Miao Yong
为了揭示V-Ti添加对热轧相变诱导塑性（TRIP）钢显微组织演变和力学性能的影响，分别设计了0.072V-0.051Ti钢（Bear-V-Ti钢）和0.001V-0.001Ti钢（Free-V-Ti钢）两种钢，并通过热力学计算和实验进行了对比分析。通过热力学计算，确定了通过固溶富集获得大比例残余奥氏体（~ 51%）的临界退火温度，并对热轧钢采用了优化的650℃淬火和200℃回火。结果表明，V-Ti TRIP钢在拉伸变形过程中表现出更佳的机械稳定性，因为V-Ti合金析出提高了残余奥氏体的含量和机械稳定性，并且显微组织也超细化。 Bear-V-Ti钢的屈服强度从650 MPa提高到800 MPa，塑性达到37%，综合力学性能大幅提高。
In order to reveal the effect of V–Ti addition on the microstructure evolution and the mechanical properties of hot-rolled transformation-induced plasticity (TRIP) steel, two steels with 0.072V–0.051Ti steel (Bear-V–Ti steel) and 0.001V–0.001Ti steel (Free-V–Ti steel) were designed, respectively, and the comparison analyses were carried out by performing thermodynamic calculation and an experiment. With the thermodynamic calculation, the critical annealing temperature of a large fraction of retained austenite (~ 51%) obtained via solute enrichment was determined, and an optimized quenching at 650 °C and tempering at 200 °C adopted on the as-hot-rolled steel. The results show that the V–Ti TRIP steel displays more optimum mechanical stability during the tensile deformation, since the fraction and the mechanical stability of retained austenite are improved and the microstructure is also ultrarefined by V–Ti alloy precipitation. The yield strength of Bear-V–Ti steel increases from 650 to 800 MPa, and the ductility reaches 37%, showing that the comprehensive mechanical properties are greatly improved.