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Hob cutter ring and preparation method

A technology of cutter ring and hob, applied in the field of shield machine, can solve the problems of long manufacturing cycle, cumbersome production process of hob cutter ring, waste of raw materials, etc., to achieve the effect of simple manufacturing process, improving comprehensive mechanical properties and saving raw materials

Active Publication Date: 2022-04-22
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a hob cutter ring and its preparation method. The preparation process of the hob cutter ring can effectively solve the problems of cumbersome production process of the hob cutter ring, long manufacturing cycle, waste of raw materials, etc.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of hob cutter ring, the steps are as follows:

[0029] S1: First, according to the overall shape of the hob cutter ring, design the three-dimensional solid model of the cutter ring through computer modeling software, slice the model, and generate the corresponding scanning path from the section data, and then send the three-dimensional model information to In the 3D printer; the 3D printing technology of selective laser melting is used to print layer by layer in the 3D printer.

[0030] S2: Preparation of alloy powder:

[0031] Specifically, iron-chromium-molybdenum-silicon-vanadium alloy powder, by mass percentage, includes 4.75% chromium, 1.10% molybdenum, 0.80% silicon, 0.40% carbon, 0.20% manganese, 0.80% vanadium, 0.01% Rare earth cerium, the balance is iron and unavoidable impurity elements.

[0032] Batching is carried out according to the mass percentage of the above elements, followed by ball milling and mixing:

[0033] Specifically, ...

Embodiment 2

[0045] The preparation method of hob cutter ring, the steps are as follows:

[0046] S1: First, according to the overall shape of the hob cutter ring, design the three-dimensional solid model of the cutter ring through computer modeling software, slice the model, and generate the corresponding scanning path from the section data, and then send the three-dimensional model information to In the 3D printer; the 3D printing technology of selective laser melting is used to print layer by layer in the 3D printer.

[0047] S2: Preparation of alloy powder:

[0048] Specifically, iron-chromium-molybdenum-silicon-vanadium alloy powder, by mass percentage, includes 5.10% chromium, 1.45% molybdenum, 1.00% silicon, 0.45% carbon, 0.35% manganese, 1.00% vanadium, 0.03% Rare earth cerium, the balance is iron and unavoidable impurity elements.

[0049] Batching is carried out according to the mass percentage of the above elements, followed by ball milling and mixing:

[0050] Specifically, ea...

Embodiment 3

[0062] The preparation method of hob cutter ring, the steps are as follows:

[0063] S1: First, according to the overall shape of the hob cutter ring, design the three-dimensional solid model of the cutter ring through computer modeling software, slice the model, and generate the corresponding scanning path from the section data, and then send the three-dimensional model information to In the 3D printer; the 3D printing technology of selective laser melting is used to print layer by layer in the 3D printer.

[0064] S2: Preparation of alloy powder:

[0065] Specifically, iron-chromium-molybdenum-silicon-vanadium alloy powder, by mass percentage, includes 5.50% chromium, 1.75% molybdenum, 1.20% silicon, 0.50% carbon, 0.50% manganese, 1.20% vanadium, 0.05% Rare earth cerium, the balance is iron and unavoidable impurity elements.

[0066] Batching is carried out according to the mass percentage of the above elements, followed by ball milling and mixing:

[0067] Specifically, ...

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Abstract

The invention provides a hob cutter ring and a preparation method. The alloy powder of the cutter ring includes the following components in weight percentage: Cr 4.75%-5.50%, Mo 1.10%-1.75%, Si 0.80%-1.20%, C 0.40%‑0.50%, Mn 0.20%‑0.50%, V 0.80%‑1.20%, Ce 0.01%‑0.05%, and the balance is iron and unavoidable impurity elements. The preparation method includes the following steps: (1) preparing the knife ring by 3D printing; (2) performing homogenization annealing and quenching and tempering treatment on the knife circle; (3) performing shot peening treatment on the knife circle after quenching and tempering treatment. This patent improves the raw materials used for 3D printing knife rings, redesigns the composition of the raw materials, adds rare earth elements to the alloy, reduces the internal defects of the product during the molding process, and ensures the quality of the printed product.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a hob cutter ring and a preparation method. Background technique [0002] With the continuous development and progress of the society, the tunnel construction and the rapid development of railway traffic, underground construction equipment plays an indispensable role. Among them, the shield machine, as the main construction equipment, has received extensive attention. However, the wear and replacement of shield machine tools has become a key factor affecting the economic cost of equipment, especially in the process of hard rock excavation, the wear of hob tools is more serious. Therefore, how to reduce the cost of shield machine tools and quickly manufacture high-performance, low-cost hob tools has become an urgent problem to be solved. [0003] At present, hob cutter rings of shield machines are mainly manufactured by traditional methods. It is characterized in that t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C21D1/26C21D1/18C21D7/06
CPCC22C38/24C22C38/22C22C38/005C22C38/04C21D1/26C21D1/18C21D7/06
Inventor 郭志凯卓兴建尤卫星叶蕾连明洋
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD