An electroplated diamond hob cutter ring and its processing technology

Abstract

The invention discloses a cutter ring of an electroplated diamond hobbing cutter. The cutter ring comprises a cutter ring matrix and a diamond wear-resistant layer electroplated onto the outer surface of the circumference of the cutter ring matrix, wherein the cutter ring matrix comprises the raw materials in percentage by mass: 0.38-0.48% of C, 0.6-0.8% of Si, 1.20-1.55% of Mn, 2.7-3.5% of Cr, 2.6-3.4% of Mo, 1.05-1.40% of V, less than or equal to 0.02% of impurities P, less than or equal to 0.02% of impurities S and the balance Fe. The invention also discloses a processing technology of the cutter ring of the electroplated diamond hobbing cutter. The processing technology disclosed by the invention is simple in method as well as high in operability and efficiency; and the cutter ring of the electroplated diamond hobbing cutter, processed by using the processing technology, is not only meticulous in surface and low in impurity content, but also high in wear resistance and long in working life.

Description

technical field [0001] The invention belongs to the technical field of tunnel and subway construction, and in particular relates to an electroplated diamond hob cutter ring and a processing technology thereof. Background technique [0002] At present, the construction of mountain tunnels and urban subways using shield tunneling and TBM methods in my country has entered a period of vigorous development. Shield tunneling and TBM methods have increasingly become the first choice for tunnel construction methods due to their strong adaptability to geological conditions, fast construction speed, and less interference with the surrounding environment. , while some cities in China that are building subways often encounter hard rock formations or extremely abrasive sandstone formations with rock compressive strengths reaching or exceeding 100 MPa. Shield machines excavate in these formations. Traditional steel hob Severe wear and tear leads to frequent tool changes, increasing construc...

AI Technical Summary

Problems solved by technology

[0002] At present, the construction of mountain tunnels and urban subways using shield tunneling and TBM methods in my country has entered a period of vigorous development. Shield tunneling and TBM methods have increasingly become the first choice for tunnel construction methods due to their strong adaptability to geological conditions, fast construction speed, and less interference with the surrounding environment. , while some cities in China that are building subways often encounter hard rock formations or extremely abrasive sandstone formations with rock compressive strengths reaching or exceeding 100 MPa. Shield machines excavate in these formations. Traditional steel hob Severe wear and tear, resulting in frequent tool changes, increasing construction risks and engineering costs

At present, the materials commonly used for hob cutter rings are 4Cr5MoSiV1, 40CrNiMo, H13, etc., but these cutter ring materials are all made of a single alloy steel material, which has the problem of poor wear resistance or easy fracture in the excavation of hard rock and sandstone formations

For metal materials prepared under general conditions, hardness and toughness are a pair of contradictions, and the increase in hardness will inevitably reduce the toughness of the material

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