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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Deformation Parameters on Microstructure and Properties During DIFT of X70HD Pipeline Steel
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Effect of Deformation Parameters on Microstructure and Properties During DIFT of X70HD Pipeline Steel

机译：变形参数对X70HD管道钢差的微观结构和性能的影响

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摘要

Grain refinement is a critical approach to improve the strength of materials without damaging the toughness. The grains of deformation-induced ferrite are considerably smaller than those of proeutectoid ferrite. Grain refinement is crucial to the application of deformation-induced ferrite. The composition of ferrite and bainite or martensite is important in controlling the performance of X70HD pipeline steel, and cooling significantly influences the control of their ratio and grain size. By analyzing the static and dynamic phase-transition points using Gleeble-3800 thermal simulator, thermal simulations were performed through two-stage deformations in the austenite zone. Ferrite transformation rules were studied with thermal simulation tests under different deformation and cooling parameters based on the actual production of cumulative deformation. The influence of deformation parameters on the microstructure transformation was analyzed. Numerous fine-grain deformation-induced ferrites were obtained by regulating various parameters, including deformation temperature, strain rate, cooling rate, final cooling temperature and other parameters. Results of metallographic observation and microtensile testing revealed that the selection of appropriate parameters can refine the grains and improve the performance of the X70HD pipeline steel.
机译：晶粒细化是一种提高材料强度而不损坏韧性的批判方法。变形诱导的铁氧体的晶粒显着小于Preputectoid铁氧体的铁素体。晶粒细化对变形诱导的铁氧体的应用至关重要。铁氧体和贝氏体或马氏体的组成对于控制X70HD管道钢的性能非常重要，冷却显着影响它们的比例和晶粒尺寸。通过使用GLEEBLE-3800热模拟器分析静态和动态相转移点，通过奥氏体区的两级变形进行热模拟。基于实际生产的累积变形的实际生产，研究了铁氧体转变规则，在不同变形和冷却参数下进行了热仿真试验。分析了变形参数对微观结构转化的影响。通过调节各种参数，包括变形温度，应变率，冷却速率，最终冷却温度和其他参数来获得许多细粒变形诱导的铁氧体。金相观察结果和微调制检测显示，适当参数的选择可以优化晶粒并提高X70HD管钢的性能。

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