Microstructure and Mechanical Properties of Welding Joints of High Nitrogen Steel by Hybrid Laser-Arc Welding

Abstract:

Hybrid laser-Arc welding was to weld 20 mm thickness high nitrogen austenite stainless steel plates. Microstructure, hardness, mechanical properties and fractography of welding joints were researched. The results showed that the microstructure of heat affected zone and weld metal is austenite and δ-ferrite, and the heat-affected zone of welding joints is Narrow, its softening zone is smaller, the hardness is more uniform, the tensile strength of welding joints is 93.8% of the base material, fractured in the weld zone. The tensile fractography are obviously dimple.

• Periodical: Applied Mechanics and Materials (Volumes 496-500)
• Pages: 444-447
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.496-500.444
• Online since: January 2014
• Authors: Zhi Hua Ma, Dong Gao Chen, Hong Wei Liu, Wu Lin Yang
• Keywords: High Nitrogen Austenite Stainless Steel, Laser-Arc Hybrid Welding, Mechanical Property, Microstructure

References

[1] Chen Penghui, He Dongfeng, Tian Naiyuan: Specical Steel Vol. 28(2007), pp.50-52, in Chinese.

[2] Yan Wangsheng: China's Manganese Industry Vol. 22(2004), pp.8-10, in Chinese.

[4] Zhao Pu: Journal of Iron and Steel Research Vol. 15(2003), pp.21-24, in Chinese.

[5] Bagger C．Olsen F O: Journal of Laser Applications Vol. 17(2005), pp.2-14.

[6] Li Zhi, Gao Qian: Journal of Iron and Steel Research Vol. 17(2005), pp.68-72, in Chinese.

[7] Woo I, Kikuchi Y: ISIJ International Vol. 42( 2002), pp.1334-1343.

[8] An Ruijin, Zhao Lin, Tian Zhinling: Applied Laser Vol. 27( 2007), pp.479-482, in Chinese.