By observing the production of cavities and measuring the growth of cavities, a model explaining the formation of cavity nucleus in superplastic material was given out.

通过观察空洞的产生和测定空洞的长大，提出了一种超塑材料空洞的形核模型。

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This part by superplastic forming process if simpler and saving material over 60% than by machining process.

与原机加工工艺相比，超塑性成形该零件的工艺简单，节省材料60%以上。

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This paper introduces a method to controll a superplastic bulging by a gas-pressure and a height curve. This method can significantly reduce the thinning rate and unevenness of bulging material.

超塑性胀形控制有各种方法，本文介绍了一种按气压与高度曲线控制的方法，使成形过程更接近于等应变速率胀形，能进一步改善零件厚度的不均匀性。

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