Hobbing cutter ring with transition wear-resistant layer and production process of hobbing cutter ring

Abstract

The invention discloses a hobbing cutter ring with a transition wear-resistant layer and a production process of the hobbing cutter ring, and belongs to the technical field of hobbing cutter rings, the hobbing cutter ring comprises a cutter ring body and a cutter ring cutting edge, and the cutter ring cutting edge comprises a transition layer, a wear-resistant layer and a net-shaped wear-resistant layer which are sequentially arranged from inside to outside from the cutter ring body. Cobalt-based WC powder is cladded in annular grooves in the two sides of the cutter ring body and on the circumferential edge of the cutter ring body to form a transition layer, nickel-based WC powder is cladded on the outer surface of the transition layer to form a wear-resistant layer, and WC large-particle alloy and WC powder are sprayed on the two sides of the cutter ring body to form a net-shaped wear-resistant layer. The cladding layers with different hardness are cladded on the cutting edge of the hob ring, the transition layer has higher toughness and wear resistance, the outer layer has higher wear resistance, the toughness can be effectively improved while the wear resistance of the hob ring is effectively improved, the failure problems of eccentric wear, blade curling, hob breakage and the like of the hob ring in the tunneling process of a TBM (Tunnel Boring Machine) are prevented, and the service life of the hob is prolonged.

Description

technical field [0001] The invention belongs to the technical field of hob cutter rings, in particular to a hob cutter ring with a transition wear-resistant layer and a production process thereof. Background technique [0002] Conventional TBM hob cutter rings have insufficient wear resistance. Under extreme geological conditions, partial wear, edge curling, and chipping are prone to occur, and frequent tool changes result in low excavation efficiency, poor economic benefits, and affect the construction period. [0003] In recent years, with the development and maturity of laser melting and plasma cladding technology, the application on the hob cutter ring is increasing, but the effect is still not ideal, and there is stress concentration inside the cladding layer, which leads to large shocks. The cladding layer is easy to peel off from the alloy body, which affects the use effect. [0004] The advantages of laser cladding technology over other surface treatment technologie...

AI Technical Summary

Problems solved by technology

The disadvantage is: due to the fast cooling rate of the laser cladding layer, the stress concentration at the junction is caused, and the material of the cladding material has a great influence on the performance of the final cladding layer.

Disadvantages: large input heat, easy to cause annealing deformation

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