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从苏联样机实物叶片解剖得知,该叶片的晶粒间界是弯曲的,而苏联手册提供的标准热处理工艺只能提供平直晶界,根本得不到弯曲晶界。苏联对它的弯曲晶界热处理工艺严加保密,查不到任何资料。 为了将GH220合金能顺利地应用于WP—13发动机一级涡轮叶片,摸索出一个合理的弯曲晶界特种热处理工艺成了一个关键问题。通过大量的热处理工艺探索,包括各种缓冷工艺,回溶工艺、等温工艺,以及与之相配合的大量的组织分析及物理化学相分析、各种力学性能检验工作,最后从一百多个试验方案中选择出1070℃等温弯曲晶界热
According to the leaf anatomy of the prototype leaf in the Soviet Union, the intergranular boundaries of the leaves were curved. However, the standard heat treatment process provided by the Soviet Union manual can only provide flat grain boundaries and no curved grain boundaries at all. The Soviet Union on its curved grain boundary heat treatment process strictly confidential, can not find any information. In order to successfully apply the GH220 alloy to the first-stage WP-13 turbine blades, it is a key issue to find a reasonable special heat treatment process for the grain boundary. Through a large number of heat treatment process exploration, including a variety of slow cooling process, backwashing process, isothermal process, as well as with a large number of organizational analysis and physical chemical phase analysis, a variety of mechanical properties testing, and finally from more than 100 The experimental scheme was selected 1070 ℃ isothermal bending grain boundary heat