(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.

此次合作的目标是产生有关管线钢中形成小 TiN 和 (Ti,Nb)(C,N) 沉淀物的加工和微观结构条件的新知识。后者的稳定性不如前者。在热轧期间，TiN 是优选的，因为它们固定奥氏体晶界。需要确定形成 TiN 而不是 (Ti,Nb)(C,N) 精细分散体的条件。此外，确定形成 NbC 的工艺条件以及这些沉淀物与韧性的关系也很有意义。该项目旨在对 TiN、(Ti,Nb)(C,N) 和 NbC​​ 析出物的数量、成分、位置和尺寸以及热轧产品和环焊热影响区 (HAZ) 的微观结构演变和性能产生新的认识[1,2] 这些管线钢对于加拿大或国际能源产品的运输至关重要。 这些产品包括石油、天然气、二氧化碳和氢气。因此，该项目将为赞助商（EVRAZ、TransCanada Pipelines Limited、CRC Evans、SGS Canada、Acuren 和 CanmetMATERIALS）提供有关热轧过程中结构和析出物演变以及它们如何影响钢材韧性的知识。此外，环焊缝参数和钢材性能之间的关系将为申办者提供有关如何评估钢材是否适合环焊缝的知识，而不仅仅是钢材化学成分。计划对五名 HQP 进行该项目的培训，以解决这些管线钢的加工结构和性能的作用。