High performance disc hob cutter ring material and its production process

Abstract

The invention belongs to the technical field of cutter ring machining and manufacturing, and relates to a high-performance disc-type hobbing cutter ring material and a production process thereof. The technical problems that in the prior art, due to the fact that the carbon content is increased and hardness is improved, toughness is reduced, tooth breakage and cracking happen to the blade portion of a cutter ring during use in hard rock, and the phenomenon that the cutter ring is broken happens in severe case are solved. The cutter ring material is prepared from 0.35%-0.42% of C, 0.8%-1.2% of Si, 0.20%-0.50% of Mn, smaller than 0.010% of P, smaller than 0.005% of S, 5.00%-5.50% of Cr, 1.80%-2.50% of Mo, 0.80%-1.20% of V,2.00%-2.50% of Co, smaller than 0.30% of Ni and the balance Fe. A hobbing cutter ring machined through the hobbing cutter ring material has the beneficial effects of being high in hardness and wear resistance and good in impact toughness.

Description

technical field [0001] The invention belongs to the technical field of cutter ring processing and manufacturing, and in particular relates to a high-performance disc hob cutter ring material and a production process thereof. Background technique [0002] At present, most of the material of the disc-type hob cutter ring of the tunnel boring machine is American H13 (equivalent to domestic 4Cr5MoSiV1), and its composition content is: [0003] C: 0.32--0.45%, Si: 0.8--1.2%, Mn: 0.20--0.50%, P<0.03%, S<0.03%, Cr: 4.75--5.50%, Mo: 1.10--1.75%, V:0.80--1.20%, Ni<0.30%; [0004] The hardness of the knife ring produced with the above materials is basically HRC54--56. It has good comprehensive mechanical properties. The hob cutter ring processed by the electroslag ingot of electric furnace smelting + LF refining + vacuum degassing + electroslag remelting can reach HRC54--56 after heat treatment. This hardness value can satisfy the excavation of soft rock, but when encounte...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-performance disc-shaped hob cutter ring material and its production process, to solve the toughness decline in the prior art. The technical problem of knife ring breakage phenomenon

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