Abstract:

Preliminary experimental study on the CLF-1 steel of structural material of CN HCSB TBM was performed using U-DW setup. Experimental results show that the tensile strength and ductility of welding joint are identical with base material if the bonding ratio of joint can reach a certain degree; however the toughness of welding joint is very sensitive, the best testing value is only 48% the corresponding value of base material, which mainly depends on the joint gap defects caused by the sources of the contaminations in the welding surface.

Key words: CN HCSB TBM, CLF-1 steel, U-DW, Bonding ratio, Impact absorbed energy

摘要：

利用单轴热扩散焊设备对中国固态包层模块结构材料CLF-1钢进行了初步的实验研究。实验结果表明，在焊缝界面结合率达到一定程度时，焊件接头的拉伸强度与塑性性能可以达到母材的水平；但焊件接头的冲击韧性则很敏感，其中最好的实验测试值只达到了母材相应值的48%，这与焊缝界面上残留污染物所导致的接头空隙缺陷有关。

关键词: 中国固态包层模块, CLF-1钢, 单轴热扩散焊, 结合率, 冲击吸收能