Method for forging 500-Kg-level GH3230 high-temperature alloy

Abstract

The invention relates to a method for forging 500-Kg-level GH3230 high-temperature alloy. According to the method, as the initial forging temperature is increased to 1200+/-10 DEG C, the problems that as the transferring time is excessively long, the initial forging temperature is excessively low, and the forging interval is reduced accordingly are solved, the crack possibility is greatly reduced due to the increasing of the initial forging temperature, and a follow-up damage repairing step is avoided; meanwhile, the forging interval between the initial forging temperature and the final forging temperature is increased by 180 DEG C to 210 DEG C; as the forging interval is increased, the one-time pressing amount is greatly increased, and the heating number is effectively decreased accordingly; meanwhile, as the end of a forge piece is wrapped by heat preservation cotton, the temperature of the end of the forge piece is lower than the temperature of the end which is not wrapped by the heat preservation cotton due to the heat insulation effect of the heat preservation cotton, the time when the end, wrapped by the heat preservation cotton, of the forge piece is in the high temperature state is short accordingly, and the problem that as the end of the forge piece is not deformed, grains are thick and large can be solved.

Description

technical field [0001] The invention relates to the field of forging, in particular to a forging method of 500Kg grade GH3230 superalloy. Background technique [0002] With the rapid development of my country's aviation technology, more and more superalloys are used in the aviation field, and the requirements for the mechanical properties and microstructure of superalloy forgings are also getting higher and higher. GH3230, as a Ni-Cr based solid-solution-strengthened deformed superalloy with high high-temperature strength, thermal fatigue resistance and stable structure, has been widely used in aero-engine flame cylinders. After adopting the existing traditional forging method for re-forging, the initial forging temperature will be kept within a certain temperature range due to the limitation of the transfer time after the forging is released, resulting in a small amount of single deformation. In order to solve the problem of small amount of single deformation , it is neces...

AI Technical Summary

Problems solved by technology

After adopting the existing traditional forging method for re-forging, the initial forging temperature will be kept within a certain temperature range due to the limitation of the transfer time after the forging is released, resulting in a small amount of single deformation. In order to solve the problem of small amount of single deformation , it is necessary to increase the number of fires. Due to the narrow forging temperature of the reagent, the amount of deformation per fire is too small to effectively break the grains. Using this forging method with multiple fires and small deformations to gradually cool down has little effect on refining the grains. At the same time, because the initial forging temperature is too low, if you do not pay attention to the amount of deformation during the process, it is easy to produce deep cracks on the forging, and you must stop cooling and repair the damage, which seriously affects the product quality.