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在许多情况下,由于大量地使用钛合金,使航空、航海和耐蚀系统的寿命延长、性能改善、但是,近几年来,钛合金的应用量却只有适度增加,其主要原因在于基本材料费用昂贵、加工件造价高。解决问题的途径是采用“成品形状”(net—shape)成形技术,减少了材料的浪费,降低了成本,钛合金铸造技术作为一种很有吸引力的“成品形状”成形途径。近来更加引人注目。本文从各个角度探讨了两种主要铸造方法——捣实石墨模铸造和熔模铸造,其中包括规格大小、制模、产品性能及其改进途径,铸件与铸锭加工材(1M)的机械性能比较表明,不仅两者的成本相当,而且很多性能诸如断裂韧性和疲劳裂纹扩展速度也很相近。这是由于铸态组织和使用热等静压具有使其内部缩孔完全愈合的能力所决定的。从而暗示铸造系数普遍地用于钛铸件是不适宜的,应认真考虑消除之。当前钛合金铸造技术的开发研究工作又有新的进展,作者对未来的发展动向提出了自己的见解。
In many cases, due to the extensive use of titanium alloys, the lifetime of aviation, marine and corrosion resistant systems has been extended and the performance has been improved. However, titanium alloys have been used only modestly in recent years mainly due to the cost of basic materials Expensive, high cost of processing pieces. The solution to this problem is to use “net-shape” forming techniques to reduce material waste and reduce costs. Titanium alloy casting technology is an attractive “finished shape” forming approach. Recently more eye-catching. In this paper, two main casting methods, tamper graphite casting and investment casting, are explored from various perspectives, including specification, mold making, product properties and their avenues for improvement, mechanical properties of casting and ingot work material (1M) The comparison shows that not only are the costs of both equal, but also many properties such as fracture toughness and fatigue crack growth rate are similar. This is due to the ability of the as-cast structure and the use of hot isostatic pressing to completely heal the internal crater. This implies that the casting factor is not generally suitable for titanium castings and should be carefully eliminated. The current titanium alloy casting technology research and development have new progress, the author of the future development trends put forward their own views.