Since the proposal of metal additive forging technology,the application of this technology to prepare ultra large forgings in black metals has become mature with the continuous improvement of basic research and the development of technological iteration in the past decade.Recently,significant breakthroughs have been made in additive forging technology for the preparation of large titanium alloy and superalloy forgings.In this paper,the research and development,preparation and evaluation of the additive forging sample piece of GH4169 turbine disk with a diameter of 1200 mm and a weight of 2 tons have been conducted.The applicability of metal additive forging technology for preparation of GH4169 superalloy turbine disk is verified from the aspects of macrostructure,grain size,and comprehensive mechanical properties.
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