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首页> 外文期刊>Journal of Materials Engineering and Performance >Precipitation Behavior and Mechanical Properties of Ti-Mo Medium-Carbon Steel During Austenite to Bainite Transformation
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Precipitation Behavior and Mechanical Properties of Ti-Mo Medium-Carbon Steel During Austenite to Bainite Transformation

机译：Ti-Mo中碳钢在奥氏体向贝氏体转变过程中的析出行为和力学性能

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摘要

The precipitation behavior and evolution of mechanical properties of Ti-Mo-bearing microalloyed medium-carbon steel during austenite to bainite transformation were studied, and two different cooling rates including ultrafast cooling (similar to 80 A degrees C/s) and accelerated cooling (similar to 15 A degrees C/s) during transformation were also investigated. The results suggest that Ti-Mo-bearing medium-carbon steel yield finer microstructure and nano-precipitates during austenite to bainite transformation during both ultrafast cooling and accelerated cooling processes. Yield strength and tensile strength obtained by ultrafast cooling process were higher than the accelerated cooling process, while the elongation was slightly reduced. Microstructural characterization indicated that grain refinement and precipitation hardening were the primary reasons for the increase in strength. Ultrafast cooling increased the density of dislocations and refined the grain size. Average size of precipitates containing Ti and Mo was 3-6 nm by ultrafast cooling process, while average precipitate size obtained by accelerated cooling process was 6-9 nm.
机译：研究了含Ti-Mo的微合金中碳钢在奥氏体向贝氏体转变过程中的析出行为和力学性能的演变，并研究了两种不同的冷却速率，包括超快冷却（类似于80 A摄氏度/秒）和加速冷却（类似于至15 A C / s）的过程中也进行了研究。结果表明，含Ti-Mo的中碳钢在超快冷却和加速冷却过程中，在奥氏体向贝氏体转变的过程中，产生了更精细的显微组织和纳米析出物。通过超快冷却工艺获得的屈服强度和拉伸强度高于加速冷却工艺，而伸长率则略有降低。显微组织表征表明，晶粒细化和沉淀硬化是强度增加的主要原因。超快冷却增加了位错的密度并细化了晶粒尺寸。通过超快冷却过程，包含Ti和Mo的沉淀物的平均尺寸为3-6nm，而通过加速冷却过程获得的平均沉淀物尺寸为6-9nm。

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