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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure Evolution and Mechanical Property of Low-Alloy Steel Used for Armor Layer of Flexible Pipe During Thermomechanical Process and Hot Rolling Process
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Microstructure Evolution and Mechanical Property of Low-Alloy Steel Used for Armor Layer of Flexible Pipe During Thermomechanical Process and Hot Rolling Process

机译：热机械加工过程中柔性管铠装层压的低合金钢的微观结构演化与力学性能及热轧工艺

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摘要

In this paper, the thermomechanical process and hot rolling process were carried out to study the microstructure evolution and mechanical property of low-alloy steel used for armor layer of flexible pipes by analyzing continuous cooling transformation curve, microstructure morphology, grain characteristics, and strength. The experimental results indicate that deformation process promotes phase transformation process of both ferrite and bainite and induces the formation of fine grain. The density of low-angle grain boundary rises with increasing cooling rate. The dislocation concentration in grain becomes larger with the extended cooling rate. The microstructure of hot-rolled specimen consists of polygonal ferrite and granular bainite, which is consistent with one of the deformed specimens with similar cooling rate in dilatometer. The microstructure evolution provides effective data fundament for hot rolling process.
机译：本文通过分析连续冷却转化曲线，微观结构形态，晶粒特性和强度，进行了热机械工艺和热轧工艺。 实验结果表明，变形过程促进了铁素体和贝氏体的相变过程，并诱导了细粒的形成。 低角度晶界的密度随着冷却速率的增加而上升。 谷物中的位错浓度随着延长的冷却速率而变大。 热轧标本的微观结构由多边形铁氧体和粒状贝氏体组成，其与一种变形样品一致，其膨胀仪中具有类似的冷却速率。 微观结构演进为热轧过程提供了有效的数据基础。

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