Cite this article as:

Guangming Xie, Ruihai Duan, Yuqian Wang, Zong’an Luo, and Guodong Wang, Microstructure and toughness of thick-gauge pipeline steel joint via double-sided friction stir welding combined with preheating, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp.724-733. https://dx.doi.org/10.1007/s12613-022-2434-3
Guangming Xie, Ruihai Duan, Yuqian Wang, Zong’an Luo, and Guodong Wang, Microstructure and toughness of thick-gauge pipeline steel joint via double-sided friction stir welding combined with preheating, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp.724-733. https://dx.doi.org/10.1007/s12613-022-2434-3
shu
引用本文 PDF XML SpringerLink

预热条件下双面搅拌摩擦焊接厚规格管线钢接头的组织与韧性

摘要: 熔焊伴随的高热输入极易引起热影响区（Heat Affected Zone, HAZ）组织的粗化和脆化，尤其是在临界粗晶热影响区（Inter-critically Coarse-grained HAZ, ICCGHAZ），严重削弱接头韧性。本研究中，在预热条件下对11 mm厚的管线钢板进行双面搅拌摩擦焊接（Friction Stir Welding, FSW），并与双面熔化极气保护焊接（Gas Metal Arc Welding, GMAW）接头进行比较，系统地研究了焊接接头中各亚区组织与韧性之间的关系。与GMAW接头相比，FSW接头ICCGHAZ韧性显著改善。通常，由于高的峰值温度和变形抗力，FSW管线钢接头焊核区（Nugget Zone, NZ）组织比较粗大。然而，在本研究中，第一道次NZ（NZ1）在进行第二道次FSW时被重新加热，由于发生铁素体静态再结晶，NZ1组织明显细化。在整个FSW接头中，NZ韧性最佳，达到母材的112%。这归因于NZ1中细小的铁素体晶粒可以有效阻碍裂纹的萌生和偏转。

 

Microstructure and toughness of thick-gauge pipeline steel joint via double-sided friction stir welding combined with preheating

Abstract: Fusion welding easily causes microstructural coarsening in the heat-affected zone (HAZ) of a thick-gauge pipeline steel joint. This is most significant in the inter-critically coarse-grained HAZ (ICCGHAZ), which considerably deteriorates the toughness of the joint. In the present work, 11-mm thick pipeline steel was joined by preheating and double-sided friction stir welding (FSW). A comparative study on the microstructure and toughness in the ICCGHAZs for FSW and gas metal arc welding (GMAW) was performed. The toughness in the ICCGHAZ for FSW was improved significantly than that in the ICCGHAZ for GMAW. Generally, the nugget zone (NZ) has a coarse microstructure in the FSW steel joint formed at the highest peak temperature. However, in the current study, the microstructure in the one-pass NZ was remarkably refined owing to the static recrystallization of ferrite. An excellent toughness was achieved in the NZ of the pipeline steel joint that employed FSW.

 

    HTML全文
    • 资源附件(0)

    • 参考文献(32)

    参考文献(32)
    • 相关文章
    施引文献

/

返回文章
返回