Grain structure uniformity evaluation method for nickel-based high-temperature alloy forging

Abstract

The invention relates to a grain structure uniformity evaluation method for a nickel-based high-temperature alloy forging. According to the grain structure uniformity evaluation method, grain structure uniformity is evaluated by establishing a grain structure uniformity evaluation function, combining nodes selected in the nickel-based high-temperature alloy forging, carrying out statistics on grain size scales of different grains of each node and percentage of each grain in a counted area, giving out uniformity function values of different positions of the nickel-based high-temperature alloy forging or an integral uniformity function value of the nickel-based high-temperature alloy forging, and obtaining a result that the closer the function values are to 0, the more uniform a grain structure is, and the closer the function values are to 1, the more nonuniform the grain structure is. By controlling different processes, the uniformity function values of the grain structure of the forging under different processes are compared, and the process corresponding to the minimum function value is an optimal process. The grain structure uniformity evaluation method can be used for grain structure uniformity evaluation of the nickel-based high-temperature alloy forging in the field of aerospace.

Description

technical field [0001] The invention relates to the field of evaluating the uniformity of grain structures of nickel-base high-temperature alloy forgings, and relates to a method for evaluating the uniformity of grain structures in different parts of nickel-base high-temperature alloy forgings. Background technique [0002] The aviation manufacturing industry has important strategic significance and a pillar role in the economic development of developed countries, and it is a concentrated expression of advanced productivity. However, as one of the world's largest aviation markets, my country does not have large civil aircraft brands with independent intellectual property rights. On February 26, 2007, the executive meeting of the State Council approved the official establishment of a major scientific and technological project for the development of large aircraft. On May 11, 2008, China Commercial Aircraft Co., Ltd., which assumed the heavy responsibility of China's large air...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of evaluating the uniformity of the grain structure of nickel-base superalloy forgings, thereby establishing a kind of evaluation function for the uniformity of grain structure of nickel-base superalloy forgings, and combining graphics to a nickel-base superalloy Evaluate the uniformity of the grain structure of superalloy forgings, in order to compare the pros and cons of the forming process through the uniformity evaluation, and obtain a better process

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