加涂层铌-752合金再入中受热分析

本文应用金相、X射线衍射和电子探针等方法,测定了加涂层铌-752合金模拟再入中在1300—2200℃受热条件下组织结构变化。应用加涂层铌-752合金不同受热温度下组织结构的特征,与再入回收铌-752合金结构件上特征部位的组织结构相比,建立了分析加涂层铌-752合金再入中的受热判据,阐明了飞行器的铌合金结构件再入中的受热分析的方法。

Analysis of Heating Condition of Coated Cb-752 Alloy Parts During Re-entry

In the present investigation, use is made of the structural characteristics at different temperatures of coated Cb-752 alloy to simulate the actual heating condition during re-entry. Specimens of coated Cb-752 sheets are successively heated from 1300℃ to 2200℃, the structure of these specimens is determined by optical microscopy, X-ray diffraction and electron micropro-be technique. The structure of the specimen taken from some specific parts of the actual recovered components is then compared with the coated simulated specimens and the temperature of that specific point on the actual components during re-entry assessed. In this way the criteria for analyzing the heating condition of coated structural parts are tentatively established. The method for analyzing the heated structural parts of coated Cb-752 alloy space vehicle during re-entry is also elucidated.