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A high-performance hob cutter ring material and its preparation method

A high-performance, hob technology, applied in the field of shield machine components, can solve the problems of complex system performance of knife ring material friction and wear performance, increase of knife ring consumption, construction cost and construction period, and decrease of knife ring toughness, etc., to achieve durability Improved abrasiveness and service life, improved hardenability, and reduced temper brittleness

Active Publication Date: 2019-11-22
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

[0004] There are various forms of cutter ring wear, and the friction and wear performance of cutter ring materials is a complex system performance, resulting in the wear of cutter ring materials has always been a technical problem in the field of shield tunneling
Therefore, when H13 series steel is used to prepare hob cutter rings, prolonging the life of hob cutter rings is a key issue that needs to be solved. wear resistance, but at the same time, it exacerbates the reduction of the toughness of the knife ring, making the knife ring more prone to abnormal damage such as chipping and fracture, which increases the consumption of the knife ring, construction cost and construction period

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A high-performance hob cutter ring material, expressed in mass percentage, the chemical element composition of the hob cutter ring material is: C is 0.59%, Si is 0.37%, Mn is 0.46%, and Cr is 5.78% , Mo is 2.75%, V is 0.68%, the total content of P and S is ≤0.025%, and the balance is iron.

[0033] The preparation method of the above-mentioned high-performance hob cutter ring material comprises the following steps:

[0034] (1) Calculate the proportioning raw materials according to the above-mentioned percentages of alloying elements; prepare pig iron (the grade is: refining 04), and ferrochrome, ferromanganese, ferromolybdenum, and ferrovanadium;

[0035] (2) Melting and casting:

[0036] a: Add the pig iron prepared in step (1) into the induction electric furnace, adjust the temperature of the molten pool in the electric furnace to 1550±10°C, and then add decarburizers, desulfurizers and deoxidizers to the molten pool of the electric furnace for the molten raw materia...

Embodiment 2

[0051] A high-performance hob cutter ring material, expressed in mass percentage, the chemical element composition of the hob cutter ring material is: C is 0.65%, Si is 0.32%, Mn is 0.40%, and Cr is 6.29%. , Mo is 2.32%, V is 0.85%, the total content of P and S is ≤0.025%, and the balance is iron.

[0052] The preparation method of the above-mentioned high-performance hob cutter ring material comprises the following steps:

[0053] (1) Calculate the proportioning raw materials according to the above-mentioned percentages of alloying elements; prepare pig iron (the grade is: refining 04), and ferrochrome, ferromanganese, ferromolybdenum, and ferrovanadium;

[0054] (2) Melting and casting:

[0055] a: Add the pig iron prepared in step (1) into the induction electric furnace, adjust the temperature of the molten pool in the electric furnace to 1550±10°C, and then add decarburizers, desulfurizers and deoxidizers to the molten pool of the electric furnace for the molten raw mater...

Embodiment 3

[0069] A high-performance hob cutter ring material, expressed in mass percentage, the chemical element composition of the hob cutter ring material is: C is 0.62%, Si is 0.35%, Mn is 0.43%, and Cr is 6.75% , Mo is 2.67%, V is 0.90%, the total content of P and S is ≤0.025%, and the balance is iron.

[0070] The preparation method of the above-mentioned high-performance hob cutter ring material comprises the following steps:

[0071] (1) Calculate the proportioning raw materials according to the above-mentioned percentages of alloying elements; prepare pig iron (the grade is: refining 04), and ferrochrome, ferromanganese, ferromolybdenum, and ferrovanadium;

[0072] (2) Melting and casting:

[0073] a: Add the pig iron prepared in step (1) into the induction electric furnace, adjust the temperature of the molten pool in the electric furnace to 1550±10°C, and then add decarburizers, desulfurizers and deoxidizers to the molten pool of the electric furnace for the molten raw materi...

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Abstract

The invention discloses a high-performance cutter ring material and a preparation method thereof. The preparation method comprises steps of smelting, casting, electroslag remelting, uniform annealing,forging, spheroidizing annealing, quenching, tempering and the like, and the high-performance cutter ring material is prepared through following chemical elements in percentage: 0.55-0.70% of C, lessthan or equal to 0.40% of Si, less than or equal to 0.50% of Mn, 5.30-6.75% of Cr, 2.0-3.0% of Mo, 0.60-0.95% of V, less than or equal to 0.025% of S and P and the balance of iron. A high-performancecutter ring made of the material has the characteristics of being good in toughness, high in hardness, and the like, and compared with a cutter ring made of a conventional material, the cutter ring is remarkably good in wearing resistance, high in construction efficiency, long in service life and short in construction period.

Description

technical field [0001] The invention relates to a hob cutter ring of a shield machine, and belongs to the technical field of shield machine parts. In particular, it relates to a high-performance hob cutter ring material and a preparation method thereof. [0002] technical background [0003] Shield machines are widely used in the construction of tunnel engineering. During the tunneling process of the shield machine, the hob cutter ring on the cutter head is in direct contact with the rock, and the cutter ring crushes the rock through rolling under the action of the longitudinal thrust. The hob cutter ring is a key component and a vulnerable part of the shield machine construction. During the construction process, the working environment is harsh, the consumption is huge, and the frequent shutdown of the tool due to tool failure increases the construction cost and slows down the construction. schedule. Therefore, under the condition of the rapid development of tunnel engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/24C22C38/22C22C38/02C22C38/04C22C33/06C21D6/00C21D1/18C21D1/26C21D1/32
CPCC21D1/18C21D1/26C21D1/32C21D6/002C21D6/005C21D6/008C22C33/06C22C38/02C22C38/04C22C38/22C22C38/24
Inventor 魏金李胜永郭浩李英发芦海俊
Owner 中铁工程装备集团隧道设备制造有限公司
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