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首页> 外文期刊>Materials Research >Microstructure, Texture and Microhardness Evolution during Annealing Heat Treatment and Mechanical Behavior of the Niobium-Stabilized Ferritic Stainless Steel ASTM 430 and Niobium-Titanium-Stabilized Ferritic Stainless Steel ASTM 439: a Comparative Study
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Microstructure, Texture and Microhardness Evolution during Annealing Heat Treatment and Mechanical Behavior of the Niobium-Stabilized Ferritic Stainless Steel ASTM 430 and Niobium-Titanium-Stabilized Ferritic Stainless Steel ASTM 439: a Comparative Study

机译：退火稳定化工艺和铌稳定铁素体不锈钢ASTM 430和铌钛稳定化铁素体不锈钢ASTM 439的显微组织，织构和显微硬度演变：对比研究

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ABSTRACT A comparison of the in?ˉ????uence of microstructure and texture on mechanical behavior between the niobium-stabilized ferritic stainless steel type ASTM 430, 430Nb, and the niobium-titanium-stabilized ferritic stainless steel type ASTM 439 was performed. The two steels were supplied as cold rolled thin sheets and the annealing was interrupted in different temperatures aiming the characterization of the microstructure and texture in different stages of recrystallization using optical microscopy, Vickers microhardness and Electron Backscatter Di?ˉ????raction. The annealed samples were tensile tested to determine the mechanical properties and undergone to Swift test to evaluate the drawability. The steel 430Nb showed smaller grain size and greater yield stress. The steel ASTM 439 presented higher normal anisotropy coefficient, R , and higher Limit Drawing Ratio due to greater proportion of ???3 fiber. These results are presented and discussed in terms of precipitates and crystallographic texture developed in the recrystallization of both steels.
机译：摘要进行了ASTM 430、430Nb铌稳定铁素体不锈钢和ASTM 439铌钛稳定铁素体不锈钢的显微组织和织构对机械性能的影响的比较。两种钢均以冷轧薄板的形式供应，并在不同温度下中断退火，目的是利用光学显微镜，维氏显微硬度和电子背向散射角衍射法表征重结晶不同阶段的组织和组织。对退火后的样品进行拉伸测试以确定其机械性能，并进行Swift测试以评估其可拉伸性。 430Nb钢显示出较小的晶粒尺寸和较大的屈服应力。由于3纤维的比例较大，ASTM 439钢具有较高的法向各向异性系数R和较高的极限拉伸比。根据两种钢的再结晶过程中产生的析出物和晶体织构，介绍和讨论了这些结果。

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