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Composite hob cutter ring and preparation method thereof

A technology of hob and cutter ring, which is used in the manufacture of tools, mining equipment, earth-moving drilling, etc., can solve the problems of not being able to take into account wear resistance and toughness at the same time, unable to meet the needs of tunnel construction, and poor toughness of cemented carbide blocks. Achieve results that facilitate large-scale production applications, avoid chipping or breakage, and simplify the manufacturing process

Active Publication Date: 2022-04-08
中铁工程装备集团隧道设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, due to the poor toughness of the cemented carbide block, it is easy to break in the impact formation, the maintenance cost is high, and the construction efficiency is reduced.
[0006] Therefore, the currently prepared knife ring materials cannot take into account both their wear resistance and toughness at the same time, and cannot meet the needs of tunnel construction for higher performance knife rings.

Method used

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  • Composite hob cutter ring and preparation method thereof
  • Composite hob cutter ring and preparation method thereof
  • Composite hob cutter ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of a composite hob cutter ring, the method comprising the following steps:

[0036] (1) preparing a particle mixture;

[0037] Take the ceramic reinforced particles with a particle size of 50-300 μm and mix them with the matrix metal powder, mix at a speed of 800r / min for 1.5 hours to obtain a particle mixture, and then filter with a mesh screen to retain fine particles with a diameter of ≤300 μm;

[0038] Wherein said matrix metal powder is preferably the metal powder used for alloy steel matrix molten steel;

[0039] (2) Heating the molten steel of the alloy steel matrix to completely melted, then adding the particle mixture in the step (1), mixing evenly, the addition of the particle mixture accounting for the mass percentage of the alloy steel matrix molten steel is 5%;

[0040] Then it is poured into a steel cylinder by means of centrifugal casting, the centrifugal speed in the centrifugal casting process is 1300r / min, the temperature of the m...

Embodiment 2

[0045] A preparation method of a composite hob cutter ring, the method comprising the following steps:

[0046] (1) preparing a particle mixture;

[0047] Take ceramic reinforcement particles with a particle size of 50-300 μm and mix them with matrix metal powder, mix at a speed of 900 r / min for 1.2 hours to obtain a particle mixture, and then filter with a mesh sieve to retain fine particles with a diameter of ≤300 μm;

[0048] Wherein said matrix metal powder is preferably the metal powder used for alloy steel matrix molten steel;

[0049] (2) Heating the molten steel of the alloy steel matrix to completely melted, then adding the particle mixture in the step (1), mixing evenly, the addition of the particle mixture accounting for the mass percentage of the alloy steel matrix molten steel is 10%;

[0050] Then it is poured into a steel cylinder by means of centrifugal casting, the centrifugal speed in the centrifugal casting process is 1000r / min, and the temperature of the mol...

Embodiment 3

[0055] A preparation method of a composite hob cutter ring, the method comprising the following steps:

[0056] (1) preparing a particle mixture;

[0057] Take ceramic reinforcement particles with a particle size of 50-300 μm and mix them with matrix metal powder, mix at a speed of 1000 r / min for 1 hour to obtain a particle mixture, and then filter with a mesh sieve to retain fine particles with a diameter of ≤300 μm;

[0058] Wherein said matrix metal powder is preferably the metal powder used for alloy steel matrix molten steel;

[0059] (2) Heating the molten steel of the alloy steel matrix to completely melted, then adding the particle mixture in the step (1), mixing evenly, the addition of the particle mixture accounting for the mass percentage of the alloy steel matrix molten steel is 20%;

[0060] Then it is poured into a steel cylinder by means of centrifugal casting, the centrifugal speed in the centrifugal casting process is 800r / min, and the temperature of the molt...

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Abstract

The invention provides a composite hob cutter ring and a preparation method thereof. Specifically: prepare particle mixture; heat alloy steel matrix molten steel, add particle mixture, mix evenly, adopt centrifugal casting to cast into steel cylinder (inner diameter 70-120mm, outer diameter 180-220mm); cast the obtained steel cylinder The tube section is cut to obtain a pipe section, and the pipe section is subjected to high-temperature forging and annealing treatment to obtain a hob cutter ring blank; the obtained blank is subjected to rough machining, heat treatment, and finish machining to obtain a composite hob cutter ring. The hob cutter ring realizes the gradient distribution of wear-resistant particles on the inner side of the cutter ring. On the premise of ensuring the overall impact resistance of the cutter ring, the wear-resistant performance of the cutter ring is significantly improved by enhancing the effect of wear-resistant particles, effectively solving the current problem. There is a problem that the hardness and toughness of the knife ring cannot be combined. The invention has simple manufacturing process, improves production efficiency, reduces production cost, and is more conducive to large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of shield machine components, in particular to a composite hob cutter ring and a preparation method thereof. In particular, it relates to a ceramic particle reinforced gradient composite hob cutter ring and a preparation method thereof. Background technique [0002] Tunnel boring machines are more and more widely used in tunnel excavation projects, which greatly improves the speed of tunnel construction. Among them, the key component of the roadheader for rock breaking is the hob cutter ring. The hob cutter ring wears out in contact with the rock, and its performance will directly affect the efficiency and cost of tunnel construction. [0003] At present, hob cutter rings in the prior art are generally manufactured as a whole using die steel. When this method is used for manufacturing, its performance depends on the material of the die steel. Under this condition, the wear resistance and impact resistance o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D13/04B22D19/16B23P15/28C21D1/18C21D1/26C21D9/22C22C33/04C22C38/02C22C38/04C22C38/22C22C38/26E21D9/10
CPCB22D19/16C22C38/02C22C38/04C22C38/22C22C38/26B22D13/04C22C33/006C22C33/04C21D9/22C21D1/26C21D1/18B23P15/28E21D9/1006
Inventor 尚勇芦海俊曾婧刘延钊李英发孙堂超姜海峰郭浩
Owner 中铁工程装备集团隧道设备制造有限公司