Construction of Thermodynamic Database for Trump Elements in Steels

钢中特朗普元素热力学数据库的构建

• 批准号: 07650807
• 负责人: OHTANI Hiroshi
• 金额: $ 1.34万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650807/
• 关键词: oxide; carbonitride; sulfide; steel

1.Calculation of phase equilibria between austenite and complex compoundsA thermodynamic model was presented to calculate the composition of austenite as well as that of complex compounds in the microalloyed steels containing Ti, V and Nb.Especially the phase separation of the carbonitrides were taken into account in the analysis. The effect of individual element was briefly summarized as follows : , (a)Ti addition to the microalloyed steels enhances the formation of Ti-rich nitrides mainly due to its extreme low solubility in austenite. (b)Complex addition of the elements bring the phase separation of the carbonitrides, and in almost cases the separation between NbC and VC or NbC and TiN is presented. This phenomena can be explained from the view points of the relative stability of binary compounds.2.Effect of secondary precipitates on the morphology of MnSIn order to control the morphology of MnS formed by solidification in steels and its modification by alloying of Ti, O,C and N,the concentraion, amount of secondary precipitates (oxides, carbonitrides) were investigated, in relation with phase equilibria.

1.奥氏体与复杂化合物相平衡的计算提出了计算含Ti、V、Nb微合金钢中奥氏体及复杂化合物成分的热力学模型，特别考虑了碳氮化物的相分离。在分析中。各个元素的影响简要总结如下： (a)在微合金钢中添加 Ti 可以增强富 Ti 氮化物的形成，这主要是由于 Ti 在奥氏体中的溶解度极低。 (b)元素的复合添加导致碳氮化物的相分离，几乎所有情况下都会出现NbC和VC或NbC和TiN之间的分离。这种现象可以从二元化合物的相对稳定性角度来解释。2.二次析出物对MnS形貌的影响为了控制钢中凝固形成的MnS的形貌，通过Ti、O、研究了C和N、浓度、二次沉淀物（氧化物、碳氮化物）的量与相平衡的关系。

项目成果

H. Ohtani et al.: "Calculation of Fe-Mn-S Ternary Phase Diagram" ISIJ International. (発表予定).

H. Ohtani 等人：“Fe-Mn-S 三元相图的计算”ISIJ International（待出版）。

Transition enthalpies and entropies of high pressure zinc metasilicates and zinc metagermanates

高压偏硅酸锌和偏锗酸锌的转变焓和熵

• DOI: 10.1007/bf00209704
• 发表时间: 1989-11-01
• 期刊: Physics and Chemistry of Minerals
• 影响因子: 1.4
• 作者: K. Leinenweber;A. Navrotsky;P. McMillan;E. Ito
• 通讯作者: E. Ito

H.Ohtani et al.: "Calculation of Fe-Mn-S Ternary Phase Diagram" ISIJ International. (to be submitted).

H.Ohtani 等人：“Fe-Mn-S 三元相图的计算”ISIJ International。

H.Ohtani et al.: "Calculation of Phase Equilibria between Austenite and Complex Carbonitrides in Microalloyes Steels" J.Phase Equilibria. (to be submitted).

H.Ohtani 等人：“微合金钢中奥氏体和复合碳氮化物之间的相平衡计算”J.Phase Equilibria。

H.Ohtani et al.: "Calculation of Fe-Mn-S Ternary Phase Diagram" ISIJ International. (発表予定).

H.Ohtani 等人：“Fe-Mn-S 三元相图的计算”ISIJ International（待出版）。