Finite element simulation of heat treatment distortion of precision parts with internal thread

doi:10.13251/j.issn.0254-6051.2022.05.042

Abstract

Abstract: Even though precision parts with internal threads produce slight distortion after heat treatment of quenching and low temperature tempering, it is not accepted for precision engineering, such as rocket engines and so on. Due to that in the subsequent process, these slight distortion might lead to serious consequences of assembly failure. The finite element software and its subroutines were used to calculate the temperature field, stress-strain field, residual stress distribution and distortion of parts during heat treatment process, considering the effect of stress on phase transformation and phase transformation plasticity. The distortion is basically consistent with that shown by the assembly results in the manufacturing process. Aiming at the problem of assembly difficulty, some suggestions to improve production process and finally to control the distortion are proposed combining with the finite element simulation results.

Key words: internal thread, heat treatment distortion, quenching-tempering, finite element simulation

CLC Number:

TG156.93

Hu Wanting, Yu Limin, Zhu Hongwei, Gao Qi, Ye Mao. Finite element simulation of heat treatment distortion of precision parts with internal thread[J]. Heat Treatment of Metals, 2022, 47(5): 241-245.

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