COMPARATIVE STUDIES ON MICROSTRUCTURE AND TOUGHNESS OF 9 % Ni STEEL JOINTS WELDED BY SMAW AND GTAW

被引：0

作者：

Zhu, Haiyang ^{[1
,2
]}

Yang, Xuebing ^{[3
]}

Liu, Kun ^{[1
]}

Wang, Xiaoyong ^{[4
]}

Du, Yuhang ^{[1
]}

Zou, Jiasheng ^{[1
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang, Peoples R China

[2] Jiangsu Univ Sci & Technol, Suzhou Inst Technol, Sch Met Engn, Suzhou, Peoples R China

[3] Zhenjiang Zhongchuan Hitachi Zosen Machinery Co Lt, Zhenjiang, Peoples R China

[4] Jiangsu Univ Sci & Technol, Sch Met Engn, Zhangjiagang, Peoples R China

来源：

MATERIALI IN TEHNOLOGIJE | 2024年 / 58卷 / 04期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

9 % Ni steel; SMAW; GTAW; microstructure; impact toughness; CRYOGENIC FRACTURE-TOUGHNESS; HEAT-AFFECTED ZONES; 9-PERCENT-NI STEEL; MECHANICAL-PROPERTIES; LASER;

D O I：

10.17222/mit.2024.109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and impact toughness of 9 % Ni steel joints welded by shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW) were investigated. The two kinds of weld metal were mainly composed of cellular dendrites and a granular precipitated phase. The grains and cellular dendrites of the GTAW weld metal were smaller than those of the SMAW weld metal. The precipitates in the SMAW weld metal were stripe-shaped while those in the GTAW weld metal were rod-shaped; the number of precipitates in the GTAW weld metal was lower than in the SMAW weld metal. The low-temperature impact toughness of the GTAW weld metal was better than that of the SMAW weld melt.

引用

页码：477 / 484

页数：8

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