Strengthening and toughening heat treatment of 60Si2Mn steel chipping blades for wood-chip machine

doi:10.13251/j.issn.0254-6051.2024.01.030

Abstract

Abstract: In according with the service conditions of wood-chip cutting machine, the preparatory heat treatment and strengthening and toughening heat treatment processes were designed for the 60Si2Mn hot-rolled steel blades, and the metallographic structure, bending strength, impact property and wear resistance were tested, and the heat treatment process of the cutting machine blades made of 60Si2Mn hot-rolled steel was optimized. The results show that the 60Si2Mn hot-rolled steel blades can obtain good combination of strength and toughness after double-refinement spheroidizing annealing, and quenching at 900-930 ℃ and tempering at 300-310 ℃, which the martensitic grade is grade 1. When quenched at 900 ℃ and tempered at 310 ℃, the bending strength reaches 4350 MPa, the impact absorbed energy is 10.3 J, and the total wear mass loss under the load of 98 N for 4 h is 14 mg, which fully meets the technical requirements of the blades of the light duty wood-chip machine.

Key words: wood-chip machine, chipping blades, 60Si2Mn steel, hardening and tempering, strengthening and toughening

CLC Number:

TG156.31

Tang Lili, Chen Kangmin, Luo Xinmin. Strengthening and toughening heat treatment of 60Si2Mn steel chipping blades for wood-chip machine[J]. Heat Treatment of Metals, 2024, 49(1): 192-197.

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