李剑颖, 王徐皇, 吴文强. 时效处理对2205双相不锈钢组织及性能的影响[J]. 金属加工(热加工).
引用本文: 李剑颖, 王徐皇, 吴文强. 时效处理对2205双相不锈钢组织及性能的影响[J]. 金属加工(热加工).
LI JianYing, WANG XuHuang, WU WenQiang. Effects of Different Aging Treatment Systems for Precipitation Behavior of σ-Phase in 2205 Duplex Stainless Steel and Influence on Mechanical Properties[J]. MW Metal Forming.
Citation: LI JianYing, WANG XuHuang, WU WenQiang. Effects of Different Aging Treatment Systems for Precipitation Behavior of σ-Phase in 2205 Duplex Stainless Steel and Influence on Mechanical Properties[J]. MW Metal Forming.

时效处理对2205双相不锈钢组织及性能的影响

Effects of Different Aging Treatment Systems for Precipitation Behavior of σ-Phase in 2205 Duplex Stainless Steel and Influence on Mechanical Properties

  • 摘要: σ相是一种会导致2205双相不锈钢力学性能恶化的析出相,不同的时效处理制度决定了它的析出量。本文研究了不同温度、时间的时效处理对2205双相不锈钢中σ相的析出行为和性能的影响,分析了σ相含量与材料延伸性能及硬度的关系,并对实际生产中的卷曲温度及冷却方法做出了建议。时效处理过程中,σ相先于δ/γ界面处析出,后不断长大形成珊瑚状亮白色相;σ相的析出规律符合等温转变曲线(TTT曲线)趋势。随着σ相析出量的增加,材料的抗拉强度、硬度增强,但延伸率降低,塑性恶化。建议实际生产中卷曲温度控制在800 ℃以下并快速冷却。

     

    Abstract: Sigma phase is a precipitate that can cause deterioration of the mechanical properties of 2205 duplex stainless steel, and its precipitation amount is determined by different aging treatment systems. This article investigates the effect of aging treatment at different temperatures and different periods on 2205 duplex stainless steel. The influence of sigma phase precipitation behavior and properties was analyzed. The relationship between sigma phase content, material elongation and hardness, and recommendations for coiling temperature and cooling method in actual production were made. Initially during the aging process, sigma phase precipitates at the δ/γ interface, followed by continuous growth to form a coral like bright white phase; The sigma precipitation pattern of the phase conforms to the trend of isothermal transformation curve (TTT curve). along with the increase in sigma phase precipitation which enhances the tensile strength and hardness of the material, but the elongation decreases and plasticity deteriorates. It is recommended to control the coiling temperature below 800 ℃ and cool it quickly in actual production.

     

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