(Ti,Nb)(C,N) precipitate characterization: from hot rolling to girth welding (ETCS)

(Ti,Nb)(C,N) 析出物表征：从热轧到环焊 (ETCS)

• 批准号: 566673-2021
• 负责人: Henein, HaniH
• 金额: $ 13.34万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746819
• 关键词: Ti; Nb; precipitate; characterization; hot

The goal of this partnership is to generate new knowledge on the processing and microstructural conditions forthe formation of small TiN and (Ti,Nb)(C,N) precipitates in pipeline steels. The latter are less stable than theformer. During hot rolling TiN is preferred as they pin down austenite grain boundaries. The conditions wherea fine dispersion of TiN rather than (Ti,Nb)(C,N) forms needs to be determined. In addition, it is of interest toidentify the process conditions that yield the formation of NbC and the relationship of these precipitates totoughness. The project seeks to generate a new understanding of the quantity, composition, location and sizeof TiN, (Ti,Nb)(C,N) and NbC precipitates and the microstructure evolution and properties of hot rolledproduct and girth welded heat affected zone (HAZ).[1,2] These pipeline steels are critical for the transport of energy procucts across Canada or internationally. These products include oil, natural gas, CO2 and hydrogen. This project will, therefore, provide the Sponsors (EVRAZ, TransCanada Pipelines Limited, CRC Evans, SGS Canada, Acuren and CanmetMATERIALS) with knowledge regarding the evolution of structure and precipitates during hot rolling and how they affect steel toughness. Additionally, the relationship between girth weld parameters and steel properties will provide Sponsors with knowledge on ways to assess the suitability of a steel for girth welding beyond simply the steel chemistry. Five HQP are planned to be trained on this project addressing the role of processing-structure and properties of these pipeline steels.

这种伙伴关系的目的是生成有关形成小锡和（ti，nb）（c，n）在管道钢中的加工和微结构条件的新知识。后者不如Former稳定。在热滚动期间，当它们固定在奥斯丁岩晶界时，首选。需要确定锡而不是（ti，nb）（c，n）形式的细胞良好分散体的条件。此外，可以识别产生NBC形成的过程条件以及这些沉淀物的关系。该项目旨在对锡（Ti，nb）（C，N）和NBC沉淀的数量，成分，位置和尺寸进行新的了解，以及热滚动产品的微观结构演化和特性，以及Girth焊接热影响区（HAZ）。 这些产品包括油，天然气，二氧化碳和氢。因此，该项目将为赞助商（EVRAZ，TransCanada Pipelines Limited，CRC Evans，SGS Canada，Acuren和Canmetmaterials）提供有关在热滚动过程中结构和沉淀的发展以及它们如何影响钢韧性的知识。此外，周长焊接参数与钢制性能之间的关系将为赞助商提供有关评估钢对围墙焊接的适用性的知识，而不是简单地钢化学。计划对五个HQP进行该项目的培训，以解决这些管道钢的处理结构和特性的作用。