摘要
采用焊接热模拟技术研究了焊接热循环对IONi8CrMoV钢热影响区粗晶区（L为1300℃）组织和性能的影响。结果表明，经历不同冷却速度（t8/5为7-112s）的热循环后，1ONi8CrMoV钢粗晶区低温冲击吸收功较基体冲击吸收功有较大幅度的提高，且随着冷却速度的增加，冲击吸收功降低幅度很小；在不同的冷却速度下，粗晶区组织均为粗大的板条马氏体组织，晶粒尺寸较大，板条马氏体界面上奥氏体薄膜的存在是粗晶区韧性提高的原因。
The effect of welding thermal cycle on microstructure and impact toughness of the coarse grain heat affected zone （CGHAZ） of 10NiSCrMoV steel was studied by using welding thermo-simulation test. The experimental results indicated that the impact toughness of the simulated CGHAZ was higher than that of base metal when peak temperature was 1 300 ℃ and t8/5 varied from 7s to 112 s. With the increasing of ts/5 , the toughness of CGHAZ decreased slowly. Microstructure of CGHAZ displayed coarse lath martensite and coarse grain. Toughness of CGHAZ was increased owing to the austenite thin film adherent lath martensite interface.
出处
《焊接》
北大核心
2006年第8期43-46,共4页
Welding & Joining
