Microstructure and mechanical properties of CLAM steel joined by plasma arc welding

作者：Shen Zheng^*; Chen Xi Zhang; Lei Yu Cheng; Huang Qun Ying

来源：Journal of Shanghai Jiaotong University, 2010, 44(SUPPL. 1): 171-174.

• After-heat
• Casting crack
• CLAM steel
• Impact property
• Low activation
• Microstructure and mechanical properties
• Plasma arc welding
• Reduced-activation ferritic/martensitic steels
• Structural materials
• Tempered martensite
• Test blanket module
• Vickers
• Welded joints
• Welding quality

Reduced activation ferritic/martensitic steels(RAFM) is considered as the primary structural materials for ITER test blanket module. In this paper, China low activation martensitic (CLAM) steel was welded by plasma arc welding and its microstructure and mechanical properties were researched. Good welding quality was achieved when plasma arc welding was applied because no casting cracks and porosity were found in the welded zone. Microstructure, hardness and impact properties of the welded joints were tested and analyzed. The results show that the microstructure of seam is tempered martensite. After heat-treated at 760 °C for 30 min, the hardness of the welded zone declines from about 480 HV to 320 HV, and the impact properties of joints increased significantly.

• 出版日期2010