为进一步提高等离子体弧柔性成形的表面质量，利用磁场控制弧柱的摆动状态进而控制单位面积上等离子体弧的热流密度，使之达到预期目的。
To improve the surface quality of flexible formation using plasma arc, its heat-flow density on unit area is controlled by controlling the swinging of the plasma arc with the alternate magnetic field.
陶瓷坯体具有尺寸变化率小，密度较高且均匀，足够的脱模强度，表面质量好等特点。
The ceramic green body is characterized by little dimensional change rate, high green body density, high homogeneity, sufficient strength for demoulding and good green body surface quality.
通过采用合理的铸造工艺，确保了其叶片型线尺寸精度、转轮表面质量及铸件内部的致密度满足了设计要求。
By adopting appropriate foundry techniques, the accuracy of dimension and shape were ensured. The surface quality and internal density of runner meet the requirements of design.
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