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A kind of wear-resistant TBM knife ring and its preparation method and application

A technology of knife ring and induction furnace is applied in the field of metal materials to achieve the effects of simple process, improved wear resistance and wide application.

Active Publication Date: 2022-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the research on improving the wear resistance of high-gravity electroslag casting knife rings with tungsten carbide

Method used

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  • A kind of wear-resistant TBM knife ring and its preparation method and application
  • A kind of wear-resistant TBM knife ring and its preparation method and application
  • A kind of wear-resistant TBM knife ring and its preparation method and application

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Embodiment 1

[0035] This embodiment provides a wear-resistant TBM cutter ring. The chemical composition of the molten steel is calculated by mass percentage, including: C0.45%, Si 1.2%, Mn 0.45%, Cr 5.2%, Mo 1.1%, V 0.8%, Al 0.02%, W0.04%, Fe90.74%.

[0036] A preparation method of a wear-resistant TBM cutter ring, comprising the following steps:

[0037] Step 1, provide raw materials;

[0038] In step 2, the raw materials are placed in an intermediate frequency induction furnace for smelting, and the whole process is protected by argon gas. During the smelting process, the upper part of the molten steel is covered with a layer of smelting slag, and the smelting temperature is controlled at 1600℃; after the smelting is completed, the tapping temperature of the intermediate frequency induction furnace is controlled at 1590℃ and the oxygen content is 20ppm;

[0039] Step 3, start the vertical centrifuge with the casting mold before tapping the intermediate frequency induction furnace, and ...

Embodiment 2

[0042] This embodiment provides a wear-resistant TBM cutter ring, the chemical composition of which is calculated by mass percentage, including: C 0.55%, Si 0.8%, Mn 0.25%, Cr 4.4%, Mo 1.5%, V 1.2%, Al 0.03%, W 0.02%, Fe 91.25%.

[0043] A preparation method of a wear-resistant TBM cutter ring, comprising the following steps:

[0044] Step 1, provide raw materials;

[0045] In step 2, the raw materials are placed in an intermediate frequency induction furnace for smelting, and the whole process is protected by argon gas. During the smelting process, the upper part of the molten steel is covered with a layer of smelting slag, and the smelting temperature is controlled at 1750°C; after the smelting is completed, the tapping temperature of the intermediate frequency induction furnace is controlled at 1660°C and the oxygen content is 30ppm;

[0046] Step 3, start the vertical centrifuge with the casting mold before tapping the intermediate frequency induction furnace, and pour t...

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Abstract

The invention provides a wear-resistant TBM cutter ring and a preparation method and application thereof, which belong to the field of metal materials. The chemical composition of the wear-resistant TBM cutter ring is as follows: C 0.45%~0.55%, Si 0.8%~1.2%, Mn0.25%~0.45%, Cr 4.4%~5.2%, Mo 1.1%~1.5%, V 0.8 %~1.2%, Al≤0.04%, W0.02%~0.04%, Fe 89.82%~92.18%. The present invention utilizes the characteristics of high hardness and high density of tungsten carbide particles, adds high wear-resistant tungsten carbide particles in the process of supergravity electroslag casting, and uses supergravity to make tungsten carbide particles uniformly dispersed in the TBM cutter ring, thereby Improve the wear resistance of TBM cutter ring.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a wear-resistant TBM cutter ring and a preparation method and application thereof. Background technique [0002] The full-face roadheader (TBM) has the characteristics of fast driving speed, high efficiency, safety and environmental protection, and is widely used in hard rock projects such as railway tunnels, pipeline tunnels and national defense tunnels. The hob cutter ring on the TBM cutter head is the core technical component of the full-section roadheader, and is the key component and vulnerable component in the TBM construction process. During the construction process, the service conditions of the knife ring are extremely bad, and the consumption is very large. Frequent replacement of the knife ring will affect the construction progress and increase the construction cost. Generally speaking, the downtime caused by the replacement of the knife ring accounts for more than 15% ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24B22D13/00B22D23/10C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C33/04B22D13/00B22D23/10
Inventor 李少英郭靖郭汉杰习小军
Owner UNIV OF SCI & TECH BEIJING
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