E5018焊条低温冲击韧性影响因素的探讨

Affecting Factors Analysis of Low Temperature Impact Toughness of Welding Electrode E5018

通过对E5018焊条配方的优化设计和理化性能试验，探讨了其熔渣碱度及焊缝金属中Mn、Si含量和Mn／Si值，对焊缝金属低温冲击韧性的影响规律。当熔渣碱度约为2．1，焊缝金属中ω（Mn）=1．42％-1．48％，ω（Si）=0．38％-0．48％和Mn／Si值大于3．5时，焊缝金属可获得较高和稳定的低温冲击韧性值。

In optmizing design and property tests of welding electrode E5018 ,influence of slag basicity, content of element Mn and Si as well as Mn/Si ratio in weld metal on low temperature impact toughness of the weld metal was investigated. The results indicate that when basicity is about 2.1 ,Mn content is 1.42% -1.48% ,Si content is 0.38% - 0.48% and Mn/Si 〉 3.5, the low temperature impact toughness of the weld metal will be relatively high and stable.