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中文摘要：
采用电子束物理气相沉积（EB-PVD）技术制备出厚度为0．3mm的Ni-Co-Cr基高温合金薄板，并用X射线衍射仪、光学显微镜、扫描电镜和拉伸设备研究了该合金热处理前后的显微组织及力学性能。结果表明，制备态合金为微晶结构，缺陷相对较多；热处理后晶粒迅速长大，缺陷密度大幅下降，并在晶粒内部形成了主要的沉淀强化相γ’相。与制备态合金相比，热处理后合金的力学性能得到明显改善，说明EB-PVD技术可以为制备性能优良的高温合金薄板提供一条新途径。
英文摘要：
The sheet of Ni-Co-Cr based superalloy with about 0.3 mm thickness was prepared by technique of electron beam physical vapor deposition. X-ray diffraction instrument, optical microscope, scanning electronic microscope and tensile equipment were used to research the microstructures and mechanical properties of the superalloy before and after heat treatment. The results show that as-deposited alloy had microcrystallites and many defects; after heat treatment the size of crystal grain became large, the defect density was decreased rapidly, γ＇ phases--the deposition strengthening phases were separated out of the crystal grains. Compared with asdeposited alloy, mechanical properties of heat-treated alloy were increased obviously. The technique of EB-PVD provides a new method for preparing superalloy sheet of excellent performance.
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