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LEI Yucheng, HAN Mingjuan, ZHU Qiang, JU Xin. Microstructure and hardness of laser welded joint of China low activation martensitic steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (1): 5-8.
Citation: LEI Yucheng, HAN Mingjuan, ZHU Qiang, JU Xin. Microstructure and hardness of laser welded joint of China low activation martensitic steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (1): 5-8.
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Microstructure and hardness of laser welded joint of China low activation martensitic steel

  • 1.

    School of Material Science and Engineering of Jiangsu University, Zhenjiang 212013, Jiangsu, China

  • 2.

    Physics Department, University of Science and Technology of Beijing, Beijing 100083, China

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  • Received Date: April 12, 2009
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    • Abstract
  • Laser welding of 6mm-thick CLAM is conducted with different welding parameters by 4 kW Nd:YAG.Microstructure and hardness of welded joint are analyzed with pre-and post tempering respectively.The results show that the microstructure of welded joints are mainly coarse lath martensite and hardness of welded joint is increased as welding speed rises before tempering.After tempering,microstructure of welded joint is tempered lath martensite.A large amount of carbide particles are observed in original austenite grain boundary and martensite lath by SEM,which lead to a slight increase in the hardness of weld zone to base metal relatively,HAZ is not softened.
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