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本文目的在于以实验法探讨TC3钛合金的超塑性及吹塑成形的可能性。改装了一台材料拉伸试验机,以适应超塑性拉伸的要求。实验结果证实这种钛合金原材料在900℃高温以极低的滑块速度0.5毫米/分拉伸具有688％延伸率,为普通拉伸试验所得的27倍之多。而在900℃,TC3钛合金板材在5个大气压的内部气体压力作用下能吹塑成各种复杂的形状。可以肯定地说,TC3钛合金原扳材为一相当出色的超塑性材料,只要施加低的气体压力就易于吹塑成任何整体的零件。显然,这一新工艺将为宇航结构选择上的设计构思提供更多的自由。
The purpose of this paper is to explore the superplasticity of TC3 titanium alloy and the possibility of blow molding by experimental method. Modified a material tensile testing machine to meet the requirements of superplastic stretching. The experimental results confirm that this titanium alloy material has an elongation of 688% at a high temperature of 900 ° C at an extremely low slider speed of 0.5 mm / min, which is more than 27 times that of an ordinary tensile test. At 900 ℃, TC3 titanium alloy sheet can be blown into various complex shapes under the pressure of 5 atmospheres of internal gas. It is safe to say that the TC3 titanium alloy sheet is a very good superplastic material that is easy to blow into any integral part as long as a low gas pressure is applied. Obviously, this new process will provide more freedom in the design of space structures.