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一、概述: 熔融钛的高度活性,使钛铸造要求特殊的熔铸装备与高稳定的造型材料。这些困难,造成了钛合金铸造技术远远落后于变形合金的局面。近年来,由于钛铸造工艺的改进,特别是熔模精密铸造技术的发展,使铸钛事业获得了一个跃进。例如美国近10年来铸钛产品大约增长了八倍。目前在先进的飞行器上,从高速战斗机,到民用客机;从小型空空导弹,到宇航飞机,都采用了钛合金铸件(图1、2、3)。随着时间的推移,
First, an overview: The high activity of molten titanium, titanium casting requires special casting equipment and high stability of modeling materials. These difficulties, resulting in titanium alloy casting technology lags far behind the deformation of the alloy situation. In recent years, due to the improvement of titanium casting process, especially the investment casting technology, the casting titanium industry has made a leap forward. For example, the United States in the past 10 years, cast titanium products increased by about eight times. Currently on advanced aircraft, from high-speed fighters to civilian aircraft; from small air-to-air missiles to spacecraft, titanium castings are used (Figures 1, 2 and 3). Over time,