ODS铁素体钢进行熔化焊接时容易出现氧化物颗粒聚集现象,采用TIG填充粉末焊接能有效避免这种现象的产生,本文通过TIG填充焊接重点研究了焊接填充粉末成分与焊接接头性能之间的关系.试验结果表明:在合适的Y2O3填充粉末和工艺条件下焊接ODS铁素体钢,能得到外观美观无裂纹、高强度、高硬度的焊接接头;适当Y2O3含量的合金填充粉末能有效抑制ODS铁素体钢熔化焊接时氧化物颗粒的聚集、细化晶粒、产生新的增强颗粒相;这些均匀分布在焊缝金属上的纳来级和亚微米级颗粒呈Y-M-O类型结构,有效提高了ODS铁素体钢焊接接头的组织和性能.
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