Design and implementation of local gradient properties of A286 superalloy thin-walled tube

doi:10.13251/j.issn.0254-6051.2024.04.039

Abstract

Abstract: Based on the annealing process requirement of thin-walled round tube of A286 superalloy rivet with core-pulling, a local induction heating model with bi-directional coupling of electromagnetic field and temperature field was established to study the distributions of electromagnetic field and temperature field, and then verified by the induction annealing test. The results show that the conducting magnet can effectively control the distribution of the magnetic field lines, and greatly increase the magnetic flux density, then in turn to improve the heating efficiency. The calculated temperature gradient is obvious, and the surface temperature distribution curve is unimodal with the middle high and two sides low, while the hardness distribution curve after annealing is unimodal with the middle low and two sides high, and the length of the low hardness zone is about 3.5 mm. After annealing of the thin-walled tube, the cold working microstructure is retained in the non-annealed zone, while the recrystallization is obvious in the annealed zone.

Key words: core-pulling rivet, thin-walled tube, A286 superalloy, induction annealing, microstructure

CLC Number:

TG156.2

Wang Chengmin, Feng Zhiguo, Jiang Yulian, Tao Liang, Mo Ningning. Design and implementation of local gradient properties of A286 superalloy thin-walled tube[J]. Heat Treatment of Metals, 2024, 49(4): 244-250.

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