论文部分内容阅读
一、研制目的 随着国防工业和国民经济的迅速发展,高温合金叶片在航空、宇航、航海、发电,交通、运输等领域中的用量逐年增加,对叶片的工作温度、持久寿命、抗燃气腐蚀性能、抗疲劳强度等综合性能的要求也不断地提高。借助通常的添加元素强化措施来提高合金的性能,已无法满足新机种、特别是高性能航空发动机叶片的使用要求。 为了适应上述要求“定向凝固”技术在六十年代就应运而生了。它的出现,在世界各国受到了普遍地重视,各航空工业发达的国
First, the purpose of development With the rapid development of national defense industry and national economy, the use of high temperature alloy blades in aviation, aerospace, navigation, power generation, transportation, transportation and other fields increased year by year, the blade temperature, long life, anti-gas corrosion Performance, fatigue strength and other comprehensive performance requirements are also continuously improved. Increasing the performance of alloys with the usual addition-element reinforcement has been unable to meet the requirements of the new aircraft, especially for high performance aero-engine blades. In order to meet the above requirements, “directional solidification” technology came into being in the 1960s. Its emergence has received universal attention in all countries in the world and has developed aviation industry