CORROSION PROPERTIES OF WELDED FERRITIC-MARTENSITIC STEELS IN LIQUID LEAD-BISMUTH AT 600C
A static corrosion test for ferritic-martensitic steel HCM12A with three types of welding in lead-bismuth eutectic (LBE) was conducted at 600OC for 500 h. The specifications of TIG welding, YAG laser welding and electron beam welding were 40A/12V of electrical conductance, 278W/14.3J of heat input and 5.0 mA of beam electric current, respectively. Oxygen concentration was controlled to be about 4.7x10-6wt% by injecting Ar-H2-H2O gas mixture into LBE. After corrosion test, cross sections of the specimens were analyzed by using optical microscope and SEM/EDX. Toughness profiles of fusion zone and base metal were determined by using Vickers hardness tool. The results show coarse grain structure in fusion zone (FZ) and typical ferritic-martensitic grain structure in base metal (BM). It was found that those Cr-rich spinel oxide layer and diffusion zone were formed on the surface. The total thickness of oxide layer and diffusion zone on and in the fusion zone was about 18-30μm. It was much thicker than 10-15μm on BM. The hardness was higher in the fusion zone than in the BM.
Asril Pramutadi Andi Mustari Minoru Takahashi
Dept.of Nuclear Engineering,Tokyo Institute of Technology 2-12-1-N1-18, O-okayama, Meguro-ku,Tokyo, Research Laboratory for Nuclear Reactors,Tokyo Institute of Technology 2-12-1-N1-18, O-okayama, Megu
国际会议
18th International Conference on Nuclear Engineering(第18届国际核能工程大会 ICONE 18)
西安
英文
1-7
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）