| METALS AND METAL MATRIX COMPOSITES |
|
|
|
|
|
Microstructure and Mechanical Properties of Copper/304 Stainless Steel Joints
Welded by Laser Beam |
| CHEN Yongcheng, LUO Ziyi, ZHANG Yupeng, YI Yaoyong, LI Mingjun
|
| Guangdong Provincial Key Laboratory of Advanced Welding Technology, Guangdong Welding Institute (China-Ukraine E.O.Paton Institute of Welding, Guangzhou 510650 |
|
|
|
|
Abstract The Copper/304 stainless steel joints with a thickness of 5mm are fabricated by disk laser,the microstructure and mechanical properties of the laser beam welded Copper/304 stainless steel joints are investigated. Results show that the microstructure of the weld is dominated by austenite matrix when the offset distance of laser beam is -0.2~0 mm, and the Cu-rich phase embedded in the austenite matrix of the weld is glo-bular and filiform and the weld crack expands along filiform Cu-rich phase embedded in the austenite. The microstructure of the weld is dominated by Cu matrix when the offset distance of laser beam is 0.2~0.4 mm, and the number of filiform Cu-rich phase embedded in the austenite decreases and the occurrence of the weld crack is effectively inhabited. The Fe-rich phase embedded in the Cu matrix of the weld is mainly globular, and has a small amount of dendrites when the offset distance of laser beam is -0.2~0.4 mm. The welded joints fracture in the copper HAZ when the offset distance of laser beam is -0.2~0.2 mm, the tensile strength and the elongation of welded joints can reach 95.6% and 39.3% of those of the copper base metal respectively. The welded joints fracture in the weld metal when the offset distance of laser beam is 0.4 mm, the tensile strength and the elongation of welded joints are 71.9% and 23.6% of those of the copper base metal respectively.
|
|
Published: 31 January 2019
|
|
|
| Fund:This work was financially supported by the Science and Technology Planning Project of Guangdong Provice of China (2017A010102008),the Guangdong Innovative Research Team Program(201101C0104901263), the Science and Technology Planning Project of Guangdong Provice of China (2016B050501002), the Science and Technology Planning Project of Guangdong Provice of China (2017A070701026). |
| About author:: Yongcheng Chen, an engineer of Guangdong Welding Institute(China-Ukraine E.O.Paton Institute of Welding, is mainly engaged in laser welding research. He has published 6 papers. applied 5national invention and utility patents and 2 of them were authorized.As the main applicant, he has applied for and participated in several science and Technology Planning Projects of Guangdong Provice of China. |
|
|
1 Guo S, Zhou Q, Kong J, et al. Vacuum,2016,128,205.
2 Zhang W Y, Zhou Z F. Welding Metallurgy And Metal Weldablility. China Machine Press, China,1987.
张文钺,周振丰.焊接冶金学与金属焊接性,机械工业出版社,1987.
3 Chen S, Huang J, Xia J, et al. Journal of Materials Processing Technology,2015,222,43.
4 Phanikumar G, Manjini S, Dutta P, et al. Metallurgical and Materials Transactions A,2005,36(8),2137.
5 Mai T A, Spowage A C. Materials Science and Engineering: A,2004,374(1),224.
6 Li Y, Hu S S, Shen J Q. Chinese Journal of Lasers,2014,41(7),93(in Chinese).
李扬,胡绳荪,申俊琦.中国激光,2014,41(7),93.
7 Nakagawa Y. Acta metallurgica,1958,6(11),704.
8 Magnabosco I, Ferro P, Bonollo F, et al. Materials Science and Engineering: A,2006,424(1),163.
9 He J, Zhao J. Acta Metallrugica Sinica,2005,41(4),407(in Chinese).
何杰,赵九洲.金属学报,2005,41(4),407. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2019, Vol. 33 
