Research on Microstructure Control and Improvement of Steel Seets Produced by Continuous Strip Casting Process

薄带连铸钢种组织控制与改进研究

• 批准号: 04555173
• 负责人: MAKI Tadashi
• 金额: $ 4.86万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555173/
• 关键词: continuous strip casting; ferritic stainless steel; solidified structure; cold rolling; recrystallization; microstructer control; β型チタン合金; 時効析出; インバー合金; ステンレス鋼

The following experimental stuies have been carried out to examine the microstructre control of recrystallization structure of solidified columnar crystals in a 19%Cr ferritic stainless steel.[1] Effects of Rolling Reductiion and Annealing Temperature on Recrystallization StructureReduction of cold-rolling was altered as 50%, 70%, and 90%, whereas subsequent annealing temperature was chainged from 700 to 1000ﾟC.Mirostructural observations and X-ray pole figure measurements were performed on specimens with different rolling and annealing conditions. The results showed that a favorable recrystallization structure with fine and uniformgrain size cannot be obtained simply by increasing rolling reduction or by increasing annealing temperature.[2] Improvement of Recrystallization Structure by the Repetition of Rolling and AnnealingThe orientations of recrystallized grains in a (001)[110]initially-oriented columnar crystal are random although such an oriented columanr crystal exhibits a very low recrystallization rate and a coarse recrystallization structure. Taking into account the above fact, the repetition of cold-rolling and annealing was applied to a columnar crystal specimen in order to improve its recrystallization structure. The result showed that a fine and uniform recrystallization structure can be achieved by two cycles of the repetition of 70% cold rolling and 973K annealing.

本文研究了19%Cr铁素体不锈钢凝固柱状晶再结晶组织的显微组织控制.[1]轧制变形量和退火温度对再结晶组织的影响冷轧变形量分别为50%、70%和90%，而随后的退火温度为700~1000ﾟC.对不同轧制和退火条件下的试件进行了显微组织观察和X射线极图测量.结果表明，单纯增加变形量或提高退火温度不能获得细小均匀的再结晶组织。[2]反复轧制和退火改善再结晶组织。在(001)[110]初始取向的柱状晶中，尽管这种取向的柱状晶具有很低的再结晶率和粗大的再结晶组织，但其再结晶晶粒的取向是随机的。考虑到这一事实，为了改善柱状晶的再结晶组织，对其进行了反复冷轧和退火处理。结果表明，重复70%冷轧和973K退火两次循环可获得细小均匀的再结晶组织。

项目成果

N.Tsuji: "Effect of Initial Orientation on the Recrystallization Behavior of Solidified Columnar Crystals in a 19%Cr Ferritic Stainless Steel." ISIJ International. 33. 783-792 (1993)

N.Tsuji:%20"效果%20of%20初始%20取向%20on%20the%20再结晶%20行为%20of%20凝固%20柱状%20晶体%20in%20a%2019%Cr%20铁素体%20不锈钢%20钢。"%20ISIJ%20国际

N.Tsuji: "Effects of roling reduction and annealing temperature on the recrystallization structure of solidified columnar crystals in a 19%Cr ferritic stainless steel." ISIJ international. 34. 1008-1017 (1994)

N.Tsuji:%20"效果%20of%20roling%20reduction%20and%20annealing%20温度%20on%20the%20再结晶%20结构%20of%20凝固%20columnar%20crystals%20in%20a%2019%Cr%20ferrite%20stainless%20steel

N. Tsuji: "Recrystallization of Solidified Columnar Crystals in an Fe-36%Ni Austenitic Alloy" Acta Metall. Mater.43. 755-768 (1995)

N.%20Tsuji:%20"再结晶%20of%20凝固%20柱状%20晶体%20in%20an%20Fe-36%Ni%20奥氏体%20合金"%20Acta%20Metall.%20Mater.43.%20755-768%20(1995

N. Tsuji: "Effects of Initial Orientation on the Cold Rolling Behavior of Solidified Columnar Crystals in an Fe-36%Ni Austenitic Alloy" Acta Metall. Mater.43. 743-754 (1995)

N.%20Tsuji:%20"效果%20of%20初始%20取向%20on%20the%20冷%20滚动%20行为%20of%20凝固%20柱状%20晶体%20in%20an%20Fe-36%Ni%20奥氏体%20合金"%20Acta

T.Maki: "Recrystallization of Solidified Columnar Crystals in an Fe-36%Ni Austenitic Alloy." Acta Metall.Mater.43. 755-768 (1995)

T.Maki:%20“再结晶%20of%20凝固%20柱状%20晶体%20in%20an%20Fe-36%Ni%20奥氏体%20合金。”%20Acta%20Metall.Mater.43.%20755-768%20(1995)