Effect of Hot‐Deformation Processes on Phase Transformation of Low‐Alloyed, Multiphase, High‐Strength Steel,Steel Research International

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Effect of Hot‐Deformation Processes on Phase Transformation of Low‐Alloyed, Multiphase, High‐Strength Steel
Steel Research International ( IF 1.9 ) Pub Date : 2020-08-07 , DOI: 10.1002/srin.201900522
Dazhao Li ₁ , Zhijie Yan ₁ , Rui Wang ₁ , Yan Kang ₁ , Liyuan Shen ₁

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Low‐alloyed, multiphase, high‐strength steels are strong and tough with good weldabilities and high cost‐to‐performance ratios. They have long‐term research value and broad application prospects. However, there are many types of phase transformations and complicated transformation processes that occur in these steels, which must be studied in detail. Understanding the phase transformations and their relationships to the mechanical properties of steels can theoretically facilitate material property enhancement and support the application and production of such steels. Herein, a Gleeble‐3800 thermosimulation test system is used to simulate the rolling process with different hot‐rolling process parameters. The effects of various parameters, such as the deformation, temperature, and velocity, on the phase‐transformation process and microstructural characteristics of low‐alloyed, multiphase, high‐strength steel are studied under hot deformation and subsequent cooling. The results show that low‐alloyed, multiphase, high‐strength steels generally undergo multiple types of phase transformations in a fixed order. The conditions during hot deformation have a critical influence on the phase transformation, i.e., they change the order of the phase transformations by promoting or suppressing certain phase‐transformation types. This causes different phase‐transformation types to predominate and results in different steel microstructures.

中文翻译：

热变形工艺对低合金多相高强度钢相变的影响

低合金多相高强度钢坚固耐用，具有良好的可焊性和较高的性价比。它们具有长期的研究价值和广阔的应用前景。但是，这些钢中存在多种类型的相变和复杂的转变过程，必须对其进行详细研究。从理论上理解相变及其与钢的机械性能的关系可以促进材料性能的增强，并支持此类钢的应用和生产。这里，使用Gleeble-3800热模拟测试系统来模拟具有不同热轧过程参数的轧制过程。各种参数的影响，例如变形，温度和速度，对低合金，多相，高强度钢在热变形和随后的冷却条件下的相变过程和显微组织特性进行了研究。结果表明，低合金，多相，高强度钢通常以固定顺序经历多种类型的相变。热变形过程中的条件对相变具有至关重要的影响，即它们通过促进或抑制某些相变类型来改变相变的顺序。这导致不同的相变类型占主导地位，并导致不同的钢组织。高强度钢通常以固定顺序经历多种类型的相变。热变形过程中的条件对相变具有至关重要的影响，即它们通过促进或抑制某些相变类型来改变相变的顺序。这导致不同的相变类型占主导地位，并导致不同的钢组织。高强度钢通常以固定顺序经历多种类型的相变。热变形过程中的条件对相变具有至关重要的影响，即它们通过促进或抑制某些相变类型来改变相变的顺序。这导致不同的相变类型占主导地位，并导致不同的钢组织。

更新日期：2020-08-07

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