CLF-1低活化铁素体/马氏体钢真空电子束焊接研究  

Reserach on electron beam welding for CLF-1 reduced activation ferritic/martensitic steel

作　　者：陈路[1] 王泽明[1] 陶海燕[1] 陈高詹 朱天军[1] 

机构地区：[1]中国核动力研究设计院 反应堆燃料及材料国家重点实验室,四川成都610041

出　　处：《焊接技术》2014年第5期26-29,1,共4页Welding Technology

摘　　要：针对中国固态增殖剂试验包层模块(TBM)的结构材料CLF-1低活化铁素体/马氏体钢,开展了真空电子束焊接试验,并在740℃/1.5 h条件下进行了焊后热处理(PWHT)。焊后表面成形良好,无任何表面缺陷。基于焊缝中气孔的形成机理,通过电子束重熔焊接的方法解决了焊后存在大量链状气孔的问题。分析了焊接接头的金相组织、力学性能及各合金元素的能谱分布。结果表明,焊态和热处理态的焊缝金属中主要均由板条马氏体组成,在电子束焊接过程中各主要的合金元素也未烧损,热处理态的焊缝抗拉强度较焊态略有下降,同时韧性有所提高。基于电子束焊接试验,成功试制了TBM模块盖板模拟件。Reduced activation ferritic/martensitic steel(CLF-1) for TBM of China were butt-welded through electron beam welding(EBW) process, and followed by post-welding heat treatment(PWHT) at 740 ℃ for 1.5 h. The microstructure, mechanical properties, and alloying elements energy spectrum distribution of welded joints were analyzed. The results showed that the weld with good formation and without appearance defects had been achieved. Based on the mechanism of gas pores formation in weld, the gas pores problem was solved by remelting process. The weld metal primarily consisted of lath martensite both in as-welded condition and after PWHT. The alloying elements were not burning loss during the electron beam welding process. In as-welded condition, the tensile strength of weldment was similar to base metal, which decreased slightly after PWHT. At the same time, the toughness increased. However, the impact toughness was below the base matel standard, which was necessary to make deep study in further work. Based on the welding experiments, the mock-up for cap which was a component of TBM was fabricated successfully.

关 键 词：CLF-1低活化铁素体 马氏体钢 电子束焊接 金相组织 力学性能 

分 类 号：TG406[金属学及工艺—焊接]