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一、锌—铝超塑性合金的利用由于锌—22％铝超塑性材料在250℃这一较低的温度下也能显示出超塑性特性,对其加工方法和用途正在进行积极的研究。目前它的用途主要是用和塑料真空成形相同的方法对其板料作胀形加工。另外,还有一种动向是利用这种材料在超塑性温度下变形抗力很小的特点,用热挤的方法制造锻件和精压件。有趣的是利用这种热挤以制作金属成形模那样的方法来制作塑料成形模,据说也有成功的例子。沿着这个方向进一步发展,利用超塑性金属制造冲裁模的例子,本刊(指《(?)
I. Utilization of Zinc-Aluminum Superplastic Alloys Zinc-22% superplasticizers can also exhibit superplastic properties at a low temperature of 250 ° C. Positive research is under way on their processing methods and applications. At present it is mainly used in the same way as plastic vacuum forming its sheet for bulging processing. In addition, there is another trend is the use of this material in the superplastic temperature deformation resistance is very small, hot extrusion method for the production of forging and coining pieces. It is interesting to note that there have also been successful examples of using this method of hot extrusion to produce plastic molds in the same manner as metal molds. Along this direction further development, the use of superplastic metal blanking die example, the magazine (referred to as "(?)