采用电子束物理气相沉积方法(EB-PVD)成功制备了直径为1000 mm,厚度为0.10～0.13 mm的镍基合金薄板.利用光学显微镜(OM)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等测试方法,对时效热处理前后试样形貌、析出相组成、高温拉伸性能进行了研究.结果表明,镍基合金薄板材料时效热处理后,晶粒长大,随时效时间延长,晶粒长大速率明显降低.在时效过程中,有细小碳化物颗粒在晶界析出,衍射花样分析表明,碳化物为FCC结构的(Cr,Fe)23C6.时效热处理后,镍基合金薄板材料高温拉伸性能有了很大提高,延伸率有一定的降低.
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