一、序言随着近代高性能航空燃气轮机的发展,对钎焊工艺提出了新的要求:首先要求钎焊接头能承受850℃或更高的温度;其次,钎焊工艺利用到发动机的关键零件——涡轮叶片上,因而要求钎焊接头具有良好的综合性能。用于制造高性能涡轮叶片的铸造高温合金中,加入了大量的强化合金元素,DZ3合金是目前国内合金化程度较高的合金之一,其铝、钛含量高达5.5%和2.5%。所以它的钎焊工艺 I. Preface With the development of modern high-performance aviation gas turbines, new requirements are put forward on the brazing process: firstly, the brazing joint needs to withstand a temperature of 850 ° C. or higher; secondly, the brazing process utilizes the key parts of the engine - - Turbine blades, thus requiring brazed joints with good overall performance. DZ3 alloy is one of the most alloying alloys in China, with the content of aluminum and titanium up to 5.5% and 2.5%, respectively, in the foundry superalloy used for manufacturing high performance turbine blades. So it’s brazing process