Physical Simulation and Experimental Examination of ε-Cu Particles Dissolution Evolution During Welding of Copper Precipitation Strengthening Steel

• Published in: Journal of iron and steel research, international Vol. 14; no. 6; pp. 58 - 62
• Main Authors: Wang, Qing-feng, Shang, Cheng-jia, Chen, Da-wei, Cai, Jian-wei, Chen, Wei-chang
• Format: Journal Article
• Language: English
• Published: Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China%Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China%Dynamic Systems Inc, Poestenkill, NY12140, USA 01.11.2007; DSI-YSU Joint Laboratory of Physical Simulation on Materials Processing, Yanshan University, Qinhuangdao 066004, Hebei, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004,Hebei, China
• Subjects: ε-Cu颗粒溶解; 动力学; 焊接方法; hardness; steel; physical simulation; welding; kinetics; ε-Cu particle dissolution
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(07)60091-0

The kinetics of ε-Cu particles dissolution in the matrix during welding of a copper-precipitation strengthening steel was determined by a combination of GleebleTM physical simulation, TEM examination and hardness meas urement. The ε-Cu particles underwent a coarsening and part dissolution and then complete dissolution reaction as the peak temperature increased from 750 to 1 000℃, which resulted in the decrease in the number density of ε-Cu particles and hardness in the heat affected zone （HAZ）. The results can be used to understand the evolution of this transformation and a softening behavior of the HAZ during welding of this type of steel.