Version 1
: Received: 2 January 2021 / Approved: 4 January 2021 / Online: 4 January 2021 (16:36:28 CET)
How to cite:
Zhang, T.; Yu, H.; Li, S.; Wang, W.; Wu, W.; Chen, H.; Chen, Y. Effect of Pr6O11 on the Microstructures and Mechanical Properties of High-Strength Steel Weld Metal. Preprints.org2021, 2021010064. https://doi.org/10.20944/preprints202101.0064.v1
Zhang, T.; Yu, H.; Li, S.; Wang, W.; Wu, W.; Chen, H.; Chen, Y. Effect of Pr6O11 on the Microstructures and Mechanical Properties of High-Strength Steel Weld Metal. Preprints.org 2021, 2021010064. https://doi.org/10.20944/preprints202101.0064.v1
Cite as:
Zhang, T.; Yu, H.; Li, S.; Wang, W.; Wu, W.; Chen, H.; Chen, Y. Effect of Pr6O11 on the Microstructures and Mechanical Properties of High-Strength Steel Weld Metal. Preprints.org2021, 2021010064. https://doi.org/10.20944/preprints202101.0064.v1
Zhang, T.; Yu, H.; Li, S.; Wang, W.; Wu, W.; Chen, H.; Chen, Y. Effect of Pr6O11 on the Microstructures and Mechanical Properties of High-Strength Steel Weld Metal. Preprints.org 2021, 2021010064. https://doi.org/10.20944/preprints202101.0064.v1
Abstract
The effect of Pr6O11 on the microstructure and mechanical properties of high-strength steel weld metal was investigated by optical microscopy, scanning electron microscopy and mechanical testing. Three different contents of Pr6O11 were added to the flux-cored wires. The results demonstrate that the addition of 1% Pr6O11 can promote the refinement and spheroidization of inclusions, refine the grains, form acicular ferrites in the weld metal, and significantly improve the toughness. The addition of Pr6O11 promoted the formation of rare earth composite inclusions and acicular ferrites in the weld metal, refined the lath microstructure, inhibited the formation of martensite and bainite. The crack formation mode changed from the boundary cracking of the bainite clusters caused by the surface shear stress to the surface shear stress-induced decohesion of inclusion. Excessive addition of Pr6O11 will reduce the number of inclusion nucleation and deteriorate the mechanical properties. The wire No.2 with 1% Pr6O11 had the good comprehensive mechanical properties.
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
