Manufacturing technology of cutter ring with gradient properties based on induction tempering

doi:10.13251/j.issn.0254-6051.2023.07.021

Abstract

Abstract: Induction heating method of local high temperature tempering was applied to cutter ring of H13E steel, and the influences of tempering temperature and induction tempering time on microstructure, hardness, impact absorbed energy and tensile strength were studied. The results show that the microstructure is tempered sorbite when tempered in the range of 580-680 ℃, and with increase of the tempering temperature, the amount of precipitated granular carbide increases, the hardness of cutter ring decreases gradually, while the impact absorbed energy increases gradually. With the increase of induction tempering time, the microstructure, hardness and impact absorbed energy of cutter ring change significantly at the beginning, and the properties tend to be stable when the tempering time is longer than 30 min. After induction tempering at 640 ℃ for 30 min, and then testing the hardness distribution of cutter ring section and microstructure at different positions, the feasibility of the method and process of cutter ring with gradient properties by induction tempering is proved.

Key words: H13E steel, cutter ring, induction tempering, heat treatment, gradient property

CLC Number:

TG156.5

Zhao Heming. Manufacturing technology of cutter ring with gradient properties based on induction tempering[J]. Heat Treatment of Metals, 2023, 48(7): 124-130.

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