焊缝区组织主要为等轴晶和树枝柱状晶，熔合区组织主要为柱状晶。
The crystallizing morphology on the weld seam was equiaxed grains and dendrites and that on the fusion area were columnar crystals.
柱状晶向等轴晶转变（CET）是在一定的凝固过程中必须控制的一种显微组织转变。
The columnar to equiaxed transition (CET) is a kind of microstructural transformation in certain solidification, which should be controlled.
当磁感应强度和频率匹配合适时，焊缝成形良好，焊缝组织几乎为细小的等轴晶。
With optimum magnetic intensity and frequency, the weld microstructures were almost fine equiaxed grains and the weld shape was.
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