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Sensors and Materials, Volume 31, Number 3(3) (2019)
Copyright(C) MYU K.K.
pp. 1065-1070
S&M1834 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2019.2158
Published: March 29, 2019

Properties and Tempering Stability of Friction-welded Joints of 700-MPa-grade Fine-grained Steel [PDF]

Runchang Liu, Cheng Yang, Yuwei Sun, and Long Zhao

(Received September 30, 2018; Accepted November 23, 2018)

Keywords: 700-MPa-grade fine-grained steel, FRW, tempering stability

Friction welding (FRW) was used to weld 700-MPa-grade fine-grained steel and the changes in the microstructure state of the joints after low-temperature tempering treatment were analyzed. The results of testing show that it is advantageous to adopt a high current for welding to reduce the width of the heat-affected zone (HAZ) and minimize the size of the grain growth. The microstructures of the weld zone (HZ) and HAZ were finer than those of the base metal (BM), and the size of the grain in the HAZ was 9–11 µm. As the thermal stability of the friction-welded joints of ultrafine-grained (UFG) welding steel is low, if it is necessary to release the residual stress of joints by tempering after welding, the temperature should not exceed 300 ℃.

Corresponding author: Yuwei Sun


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Cite this article
Runchang Liu, Cheng Yang, Yuwei Sun, and Long Zhao, Properties and Tempering Stability of Friction-welded Joints of 700-MPa-grade Fine-grained Steel, Sens. Mater., Vol. 31, No. 3, 2019, p. 1065-1070.



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