Abstract The paper analysed the microstructure and properties of various regions on the welded joints to evaluate the performance of the welding wire. The composition of the welding line was similar to deposited metal, and the second phases were the austenites. The actual migration distance of solidification grain boundary ranged from 5 to 15 μm. Nb-phases with a columnar distribution were observed, and the Nb-phases had the pinning effect in the HAZ. The liquefaction at the grain boundaries close to the fusion line occurred.

中文翻译：

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Super304H钢多道焊和丝焊接头的组织和性能

摘要 分析了焊接接头各区域的组织和性能，以评价焊丝的性能。焊缝的成分与熔敷金属相似，第二相为奥氏体。凝固晶界的实际迁移距离为5～15μm。观察到具有柱状分布的 Nb 相，并且 Nb 相在 HAZ 中具有钉扎效应。在靠近熔合线的晶界处发生液化。