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Abstract：
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In order to solve the problems of low accuracy, big allowance, low material utilization rate and long period for manufacturing in the rolling process of low-pressure turbine casing profile ring forgings, the bulging process of GH4169 alloy low-pressure turbine casing profile ring forgings was studied by the method of combining numerical simulation and process trial production. The simulation study clarified the influence laws of the bulging deformation amount on the stress, strain, temperature distributions and uniformities of low-pressure turbine casing profile ring forgings. Then, through comprehensive consideration, the bulging deformation amount was suggested to be 1.5%, which was more reasonable. The trial production research of the bulging process shows that the GH4169 alloy low-pressure turbine casing profile ring forgings are reshaped by the bulging process, which significantly reduces the ellipticity of forgings, improves the dimensional accuracy of forgings, reduces the forgings allowance, increases the uniformity of allowance, improves the material utilization rate of forgings, and at the same time effectively improves the mechanical properties and the uniformity of forgings. Finally, the improvement of the uniformity of the forgings allowance can effectively reduce the mechanical deformation of the low-pressure turbine casing parts.
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Funds：
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国家自然科学基金资助项目(51875468, 51575448)
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AuthorIntro：
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作者简介：罗鸿飞（1987-），男，学士，工程师，E-mail：luohongfei@gzhykj.net；通信作者：吴永安（1970-），男，学士，研高，E-mail：wya@gzhykj.net
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Reference：
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