Analysis on SH-CCT curves of HD15Ni1MnMoNbCu steel for nuclear power station

• 作 者: 张建林 朱平 陈忠兵 张发云 黄茂涛 王淦刚
• 机 构: Suzhou Nuclear Power Research Institute Co.,Ltd,Nuclear and Radiation Safety Center,
• 出 处: China Welding
• 发表日期: 2016年03期
• 关键词: martensite hardness welding Vickers successively ferrite SMAW simulator welded t

The microstructural evolution and Vickers hardness measurement in the welding heat-affected zone(HAZ) of HD15Ni1 MnMoNbCu steel for nuclear power station were investigated by Gleeble-3180 thermal mechanical simulator,and the simulated HAZ continuous cooling transformation curves(SH-CCT) were measured simultaneously.With t_(8/5) increasing from3.75 s to 15 000 s,the product was obtained martensite,bainite,ferrite and pearlite,successively.The result of microstructure and Vickers hardness in the heat-affected zone was in good agreement with those measured by SH-CCT diagram with the heat input 16.2 kJ/cm as an example to weld the HD15Ni1 MnMoNbCu steel pipe using TIG/SMAW/SAW welding methods.

The microstructural evolution and Vickers hardness measurement in the welding heat-affected zone (HAZ) of HD15Ni1MnMoNbCu steel for nuclear power station were investigated by Gleeble-3180 thermal mechanical simulator, and the simulated HAZ continuous cooling transformation curves (SH-CCT) were measured the product of obtained martensite, bainite, ferrite and pearlite, successively. The result of microstructure and Vickers hardness in the heat-affected zone was in good agreement. (8/5) increasing from 3.75 s to 15 000 s with those measured by SH-CCT diagram with the heat input 16.2 kJ / cm as an example to weld the HD15Ni1 MnMoNbCu steel pipe using TIG / SMAW / SAW welding methods.