The Research on Microstructure and Properties of WQ960 Welded Joints under Longitudinal Magnetic field

DOI

10.2991/meic-14.2014.21How to use a DOI?

Keywords

HSLA; Magnetic field; grain refinement; mechanical property

Abstract

The WQ960 steel is high strength steel, which is widely used. The WQ960 high strength steel was welded by gas metal arc welding under longitudinal magnetic field. The tensile strength, impact properties and microstructure were tested by tensile test, impact test and metallograghy test, which were under different processing parameters. The influence and acting mechanism of magnetic field on the microstructure, impact toughness and tensile strength of the welded joints were researched. The results show that magnetic field can improve the tensile strength, impact energy and microstructure of welded joints. Under the effect of magnetic field, the dimples in the fiber area of impact fracture of welded joints were deeper and more uniform. When the excitation current is 2.5A, the magnetic field frequency is 20Hz, the tensile strength of welded joints and low impact energy reach the maximum, respectively 839MPa and 71J increased 17.01% and 22.41%.The longitudinal magnetic field is applied to improve the weld crystalline form, reduce the number of PF and FSP, and form more AF.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hailong Lu
AU  - Lixiang Wang
AU  - Yunhai Su
PY  - 2014/11
DA  - 2014/11
TI  - The Research on Microstructure and Properties of WQ960 Welded Joints under Longitudinal Magnetic field
BT  - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 92
EP  - 95
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-14.2014.21
DO  - 10.2991/meic-14.2014.21
ID  - Lu2014/11
ER  -