Effect of Cold-rolling Deformation on Microstructure and Mechanical Properties of Fe-11Cr-5Al-2Mo Alloy
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摘要: 为掌握 Fe-11Cr-5Al-2Mo合金冷变形规律，并为其包壳管材研制提供基础数据和理论依据。开展了不同冷轧变形量的Fe-11Cr-5Al-2Mo合金板材轧制实验，对冷轧后的板材在800℃下进行了1 h退火，并对冷轧板材及退火板材的显微组织演变进行了表征，通过室温拉伸试验评价了Fe-11Cr-5Al-2Mo合金的强度和塑性。Fe-11Cr-5Al-2Mo合金板材的变形态组织随着冷轧变形量的增大而拉长，板材的强度随着冷轧变形量的增大而增大。800℃退火1 h后，50%冷轧变形量的板材获得了最细小、均匀的再结晶组织，并且具有良好的韧塑性配合。本文阐明了合金冷轧变形量-组织-性能之间的关系，为Fe-11Cr-5Al-2Mo合金管材冷轧变形量设计和退火工艺研究提供了参考。
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关键词:
- Fe-11Cr-5Al-2Mo合金 /
- 冷轧变形 /
- 力学性能 /
- 显微组织
Abstract: The purpose of the study is to understand the cold deformation rule of Fe-11Cr-5Al-2Mo alloy, so as to provide data and theoretical basis for the cladding tube manufacturing. The rolling experiments of Fe-11Cr-5Al-2Mo alloy plates with different cold-rolled deformation were carried out. The cold-rolled plates were annealed at 800℃ for 1 h, and the microstructure evolution of the cold-rolled plates and annealed plates was characterized. The strength and plasticity of Fe-11Cr-5Al-2Mo alloy were evaluated by the tensile test at room temperature. The deformed microstructure of Fe-11Cr-5Al-2Mo alloy plate is elongated with the increase of cold rolling deformation, and the strength of the plate increases with the increase of cold rolling deformation. After annealing at 800℃ for 1h, the plate with 50% cold rolling deformation showed the smallest and uniform recrystallization microstructure, and had a good ductile-plastic fit. In this paper, the relationship between cold rolling deformation, microstructure and properties of the alloy is expounded, which provides a reference for the design of cold rolling deformation and the study of annealing process of Fe-11Cr-5Al-2Mo alloy tube.-
Key words:
- Fe-11Cr-5Al-2Mo alloy /
- Cold-rolling deformation /
- Mechanical properties /
- Microstructure
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图 1 室温拉伸样品示意图 mm
TD—板材横向；RD—板材轧向；ND—板材法向；R—圆角半径
Figure 1. Schematic Diagram of Tensile Sample at Room Temperature
图 2 Fe-11Cr-5Al-2Mo合金不同冷轧变形量的晶相组织
Figure 2. Crystal Microstructure of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation
图 3 不同冷轧变形量的Fe-11Cr-5Al-2Mo合金经800℃退火后的晶相组织
Figure 3. Crystal Microstructure of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation after Annealing at 800℃
图 4 不同冷轧变形量下退火后Fe-11Cr-5Al-2Mo合金板材的晶粒取向图
Figure 4. Grain Orientation of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation after Annealing
图 5 冷轧变形量对退火后Fe-11Cr-5Al-2Mo合金板材平均晶粒尺寸的影响
Figure 5. Effect of Cold Rolling Deformation on Average Grain Size of Annealed Fe-11Cr-5Al-2Mo Alloy Plates
图 6 不同轧制变形量退火后Fe-11Cr-5Al-2Mo合金板材晶界分布
Figure 6. Grain Boundary Distribution of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation after Annealing
图 7 不同冷轧变形量Fe-11Cr-5Al-2Mo合金板材的工程应力-应变曲线
Figure 7. Engineering Stress-strain Curves of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation
图 8 轧态Fe-11Cr-5Al-2Mo合金板材力学性能随冷轧变形量的变化曲线
Figure 8. Mechanical Properties of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation
图 9 不同冷轧变形量的退火态Fe-11Cr-5Al-2Mo合金板材的工程应力-应变曲线
Figure 9. Engineering Stress-strain Curves of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation after Annealing
图 10 退火态Fe-11Cr-5Al-2Mo合金板材力学性能随冷轧变形量的变化曲线
Figure 10. Mechanical Properties of Fe-11Cr-5Al-2Mo Alloy Plates under Different Cold Rolling Deformation after Annealing
表 1 Fe-11Cr-5Al-2Mo合金化学成分实测值
Table 1. Actual Composition of Fe-11Cr-5Al-2Mo Alloy
元素 Cr Al Mo Si Y Fe 质量分数/% 10.7 5.0 1.8 0.19 0.04 余量 
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