Research on Controlling Organization Uniformity of Axial Forgings in the Process of Swaging

doi:10.3901/JME.2018.10.110

Abstract

Abstract: The upper flat and lower V-shaped anvils swaging is usually used in final forging forming of a part of steam turbine that is named low pressure rotor, which results in uneven forgings deformation and distribution of grain and makes the following heat treatment more difficult. Taking microstructure uniformity controlling as the target, 30Cr2Ni4MoV low-pressure rotor steel is used. And with the method of combination of shrinkage ratio experiment and numerical simulation by DEFORM-3D, the effects of the deformation and temperature on microstructure uniformity of forgings are researched. The results of numerical simulation and physical simulation show that the degree of deformation and heating temperature have great influence on grain size of the forgings. By increasing the degree of deformation and forging temperature, microstructure uniformity of forgings can be controlled effectively. When the forging temperature is 1 250℃ and forging ratio is 1.2-1.3, the most even microstructure of the forgings is obtained. The results can provide reference for the establishment of final forging molding process of the steam turbine rotor.

Key words: 30Cr2Ni4MoV steel, axle, organization uniformity, swaging

CLC Number:

TG316

CHEN Fei, LIU Jiansheng, MA Yue. Research on Controlling Organization Uniformity of Axial Forgings in the Process of Swaging[J]. Journal of Mechanical Engineering, 2018, 54(10): 110-116.

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