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Shield machine hob alloy material

A technology of alloy materials and shield machines, which is applied in mining equipment, earthwork drilling, tunnels, etc., and can solve problems such as the short service life of hobs and the difficulty in meeting the technical specifications of high-quality hobs.

Active Publication Date: 2020-04-17
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, it is difficult to find an alloy in my country's steel materials that can not only meet the hardness requirements, but also meet the toughness requirements, that is, it is difficult to meet the technical index requirements of high-quality hobs (hardness ≥ 56HRC, impact value ≥ 20J) , so the service life of the hob is not long

Method used

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  • Shield machine hob alloy material
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  • Shield machine hob alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. A shield machine hob alloy material is composed of the following elements in terms of weight ratio:

[0026]

[0027] The rest is Fe and trace elements.

[0028] The above-mentioned alloy material is treated according to the following heat treatment method: keep the material at 880°C for 30 minutes, then put it in 50°C quenching oil to cool for 18s, then keep it in a salt bath at 270°C for 60 minutes, and finally cool it with water to room temperature.

[0029] The alloy obtained above has a hardness of 56HRC and an impact energy of 26J.

Embodiment 2

[0030] Example 2. A shield machine hob alloy material is composed of the following elements in terms of weight ratio:

[0031]

[0032] The rest is Fe and trace elements.

[0033] Heat treatment method is with embodiment 1.

[0034] The alloy obtained above has a hardness of 57HRC and an impact energy of 25J.

Embodiment 3

[0035] Example 3. A shield machine hob alloy material is composed of the following elements in terms of weight ratio:

[0036]

[0037] The rest is Fe and trace elements.

[0038] Preferably, the aforementioned shield machine hob alloy material is composed of the following elements by weight ratio:

[0039]

[0040] The rest is Fe and trace elements.

[0041] Heat treatment method is with embodiment 1.

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Abstract

The invention discloses a shield machine hob alloy material. The shield machine hob alloy material comprises, by weight, 0.66% of C, 1.92% of Si, 0.92% of Mn, 0.21% of V, 1.52% of Cr, less than or equal to 0.013% of P, less than or equal to 0.007% of S and the balance Fe and trace elements. According to the shield machine hob alloy material, the impact toughness of the material is improved while the hardness of the material is improved; and the material is used for manufacturing a hob of a shield machine, the technical index requirement of the hob can be met, and the service life of the hob iseffectively prolonged.

Description

technical field [0001] The invention relates to the technical field of shield machine materials, in particular to a shield machine hob alloy material. Background technique [0002] The shield machine is more and more widely used in the construction of major projects such as urban subways, railways and highways, and energy transportation pipelines. Shield machine tunneling has the advantages of fast construction speed, high quality, low labor intensity, economy, and environmental protection. The hob in the shield machine is a component that directly contacts and acts on rocks and soil, which is equivalent to the teeth of the shield machine, and is an important structural component in the tunneling operation of the shield machine. Since the work of the shield machine tools is in the underground soil, rocks, and gravel accompanied by a humid environment, the service environment is relatively harsh, and its main failure forms are fracture, wear, and deformation. In order to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/24C22C38/34E21D9/08
CPCC22C38/04C22C38/24C22C38/34E21D9/08
Inventor 赵飞刘源彭承银
Owner GUIZHOU UNIV
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