Nitrogen Content Effects on Microstructural Evolution and Low-Temperature Impact Toughness in the Coarse-Grained Heat-Affected Zone of Welded X70 Pipeline Steel

The low-temperature toughness of a coarse-grained heat-affected zone (CGHAZ) is a critical factor governing the service safety of welded joints in X70 pipeline steel. This study systematically investigated the influence of nitrogen content (ranging from 0.0018 to 0.0120 wt%) on the microstructure an...

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Auteurs principaux:	Jiangcheng Liu, Kai Guo, Haote Ma, Jiangli He, Junchao Wang, Chuanyou Zhang, Tiansheng Wang, Qingfeng Wang
Format:	Artigo
Langue:	Inglês
Publié:	MDPI AG 2026-03-01
Collection:	Metals
Sujets:	pipeline steel nitrogen content coarse-grained heat-affected zone impact toughness microstructure evolution
Accès en ligne:	https://www.mdpi.com/2075-4701/16/3/331
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