Research on carbide characteristics and their influence on the properties of welding joints for 2.25Cr1Mo0.25V steel

Qing Li, Guangxu Cheng, Mu Qin, Yafei Wang, Zaoxiao Zhang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The carbide characteristics of 2.25Cr1Mo0.25V steel have an extremely important influence on the mechanical properties of welding joints. In addition, hydrogen resistance behavior is crucial for steel applied in hydrogenation reactors. The carbide morphology was observed by scanning electron microscopy (SEM) and the carbide microstructure was characterized by transmission electron microscopy (TEM). Tensile and impact tests were carried out and the influence of carbides on properties was studied. A hydrogen diffusion test was carried out, and the hydrogen brittleness resistance of welding metal and base metal was studied by tensile testing of hydrogenated samples to evaluate the influence of hydrogen on the mechanical properties. The research results show that the strength of the welding metal was slightly higher and the Charpy impact value was significantly lower compared to the base metal. The hydrogen embrittlement resistance of the welding metal was stronger than that of the base metal. The presence of more carbides and inclusions was the main cause of the decreased impact property and hydrogen brittleness resistance of the welding metal. These conclusions have certain reference value for designing and manufacturing hydrogenation reactors.

Original languageEnglish
Article number891
Pages (from-to)1-21
Number of pages21
JournalMaterials
Volume14
Issue number4
DOIs
Publication statusPublished - Feb 2 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Research on carbide characteristics and their influence on the properties of welding joints for 2.25Cr1Mo0.25V steel'. Together they form a unique fingerprint.

Cite this