Control of mesoscopic structure of super metal by fine dispersion of inclusion particles

通过夹杂物颗粒精细分散控制超级金属的细观结构

• 批准号: 10450278
• 负责人: SUITO Hideaki
• 金额: $ 7.87万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10450278/
• 关键词: Inclusion; Deoxidation product; Nitride; Fine dispersion; Austenite grain size; Control of grain size; TiN; 脱酸生成物; 一次介在物; 凝固組織; オーステナイト粒; 結晶成長; 微細化; 形態; 粒度分布; 脱酸剤; 介在物抽出

An Fe-10 mass pct Ni melt was deoxidized by M (M=Si, Ti, Al, Zr, and Ce) at 1600℃, and then was quenched in water. The mean spatial diameter of inclusions tended to increase with increasing holding time, but did not show the systematic trend with respect to the deoxidation power (Si<Ti<Al< Zr<Ce). The number of particle sections per unit area decreased with decreasing deoxidation power and with increasing holding time. In all deoxidation experiments, the initial primary deoxidation products contained FeO and the content of FeO decreased with increasing the deoxidation power and holding time.An appropriate amount of Fe-50 mass% Ti alloy was added into Fe-10 mass% Ni melt, and then quenched. The number of particles per unit area, N_A, in nondendritic zone is significantly smaller than that in dendritic zone, and the N_A values in both zones increase with area fraction of solid and holding time at 1400℃.An appropriate amount of Fe-50 mass% M (M=Al, Zr, Ce) alloy or Ni-Mg alloy was added into Fe-10 mass% Ni melt, and then stirred at 1600℃. Thereafter, An Fe-50 mass% Ti alloy was added into the melt, and then stirred. The melt was cooled to 1400℃ and quenched. The N_A values for the TiN+MgO particles are considerably higher than those in other deoxidation. The size of TiN+MgO particles are smaller than those in other deoxidation. The N_A values for TiN and TiN+M_xO_y (M=Al, Zr and Ce) particles in dendritic mode are higher than those in nondendritic mode, while the size of TiN and TiN+M_xO_y (M=Al, Zr and Ce) particles in dendritic mode are smaller than those in nondendritic mode. The N_A values for the TiN and TiN+M_xO_y particles tend to slightly increase with holding time at 1400℃, but the values remain mostly unchanged.

将Fe-10质量%的Ni熔体在1600℃下用M（M=Si、Ti、Al、Zr和Ce）脱氧，然后在水中淬火。随着保温时间的延长，夹杂物的平​​均空间直径呈增大趋势，但与脱氧能力的关系并未表现出系统性的趋势（Si<Ti<Al<Zr<Ce）。每单位面积的颗粒部分的数量随着脱氧功率的降低和保持时间的增加而减少。所有脱氧实验中，初始初次脱氧产物均含有FeO，且随着脱氧功率和保温时间的增加，FeO含量逐渐减少。在Fe-10质量％Ni熔体中加入适量的Fe-50质量％Ti合金，然后淬火。非枝晶区单位面积颗粒数N_A明显小于枝晶区，且随固体面积分数和1400℃保温时间的延长，两个区的N_A值均增加。在Fe-10质量%Ni熔体中加入适量的Fe-50质量%M（M=Al、Zr、Ce）合金或Ni-Mg合金，然后在1600℃下搅拌。然后，将Fe-50质量％Ti合金添加到熔体中，然后搅拌。将熔体冷却至1400℃并淬火。 TiN+MgO 颗粒的 N_A 值明显高于其他脱氧中的 N_A 值。 TiN+MgO颗粒的尺寸比其他脱氧中的颗粒要小。枝晶模式下TiN和TiN+M_xO_y(M=Al、Zr、Ce)颗粒的N_A值高于非枝晶模式，而枝晶模式下TiN和TiN+M_xO_y(M=Al、Zr、Ce)颗粒的尺寸小于非枝晶模式。随着1400℃保温时间的延长，TiN和TiN+M_xO_y颗粒的N_A值略有增加，但值基本保持不变。