纳米稀土氧化物对铁粉焊条焊缝低温冲击韧度的影响

Effect of Nanometer CeO_2 on Low-temperature Impact Toughness of Weld of Iron Powder Electrode

在碱性铁粉焊条药皮中添加不同量的纳米稀土氧化物粉体,对焊缝进行扩散氢含量、低温冲击及化学成分的测试和分析。结果表明:适量的纳米稀土氧化物粉体可有效降低熔敷金属中扩散氢及硫、磷的含量,并能显著提高焊缝金属的低温冲击韧度。

Adding the different nanometer CeO2 content to alkali iron powder electrode, the diffusible hydrogen content, low-temperature impact and chemical composition of the weld were tested. The results indicate that proper nanometer CeO2 can decrease the content of the diffusible hydrogen, S and P in the molten metal and greatly increase the low-temperature impact toughness of the weld.