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A kind of tunnel boring machine hob cutter ring alloy material and preparation method thereof

A tunnel boring machine and alloy material technology, which is applied in the field of tunnel boring machine hob cutter ring alloy material and its preparation, can solve the problems that it is difficult to meet the large wear amount of the hob cutter ring, so as to improve toughness, strength and toughness, The effect of improving toughness

Active Publication Date: 2019-06-07
山东易斯特工程工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the carburized layer is relatively thin, and it is still difficult to meet the requirements of the large wear amount of the hob cutter ring

Method used

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  • A kind of tunnel boring machine hob cutter ring alloy material and preparation method thereof
  • A kind of tunnel boring machine hob cutter ring alloy material and preparation method thereof
  • A kind of tunnel boring machine hob cutter ring alloy material and preparation method thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing the TBM hob alloy material described in the above technical solution, comprising the following steps:

[0045] (1) casting the alloy raw material after smelting to obtain a cylindrical casting;

[0046] (2) forging the cylindrical casting obtained in the step (1) after being kept warm to obtain a blank;

[0047] (3) annealing the preform obtained in the step (2) to obtain an annealed preform;

[0048] (4) roughly machining the annealed blank obtained in the step (3) to obtain a preliminary product;

[0049] (5) Quenching and tempering the primary product obtained in the step (4) in sequence to obtain the alloy material of the tunnel boring machine hob cutter ring.

[0050] In the invention, alloy raw materials are smelted and then cast to obtain cylindrical castings. In the present invention, there is no special limitation on the type of the alloy raw material, and the alloy raw material for steelmaking well-...

Embodiment 1

[0067] (1) According to the target alloy composition, the mass percentage is: C 0.72%, Si 1.19%, Mn 1.41%, Cr 2.23%, Mo 1.62%, Ni 1.02%, V 1.12%, Nb 0.26%, S 0.027%, P 0.024%, the balance is Fe, the preparation of various steel scrap, high carbon ferrochrome, low carbon ferrochrome, ferrosilicon, ferromanganese, ferromolybdenum, ferrovanadium, ferroniobium and nickel raw materials, using intermediate frequency melting furnace melting at 1650 ℃ Melting raw materials into molten iron;

[0068] (2) add aluminum powder in molten iron, add-on is 0.08% of molten iron weight, carries out deoxidation treatment;

[0069] (3) After calming and removing slag, pour molten iron into the sand mold at a temperature of 1580°C to obtain a cylindrical casting;

[0070] (4) Clean up the residual molten iron on the surface of the cylindrical casting, and forge after cleaning. When forging, heat to 1140°C for 5 hours before forging, start forging temperature is 1040°C, final forging temperature ...

Embodiment 2

[0076](1) According to the target alloy composition, the mass percentage is: C 0.79%, Si 1.33%, Mn 1.62%, Cr 2.51%, Mo 1.81%, Ni 1.35%, V 1.05%, Nb 0.16%, S 0.025%, P 0.027%, the balance is Fe, prepare scrap steel, high carbon ferrochrome, low carbon ferrochrome, ferrosilicon, ferromanganese, ferromolybdenum, ferrovanadium, ferroniobium and nickel raw materials, using intermediate frequency melting furnace to melt at 1630 ℃ Melting raw materials into molten iron;

[0077] (2) add aluminum powder in molten iron, add-on is 0.12% of molten iron weight, carries out deoxidation treatment;

[0078] (3) After calming and removing slag, pour molten iron into the sand mold at a temperature of 1560°C to obtain a cylindrical casting;

[0079] (4) Clean up the residual molten iron on the surface of the cylindrical casting, and forge after cleaning. When forging, heat to 1120°C for 6 hours before forging, start forging temperature is 1020°C, final forging temperature is ≥900°C, forging r...

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Abstract

The invention provides a TBM (tunnel boring machine) hob cutter ring alloy material and a preparation method thereof. The material comprises, by mass, 0.70-0.90% of C, 1.01-2.00% of Si, 1.01-2.00% ofMn, 2.00-3.00% of Cr, 1.50-2.00% of Mo, 1.01-2.00% of Ni, 0.80-1.50% of V, 0.10-0.40% of Nb, less than or equal to 0.03% of S, less than or equal to 0.03% of P and the balance Fe. By alloying matchingof elements including Mn, Si, Cr, Ni, Mo, V and the like, mechanical performances of the TBM hob cutter ring alloy material are improved, and strength of the alloy material is remarkably improved onthe premise that the requirement on toughness is met. According to embodiment results, the TBM hob cutter ring alloy material is 59-62 in HRC hardness and 6-10J / cm<2> in impact toughness (ak).

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a tunnel boring machine hob cutter ring alloy material and a preparation method thereof. Background technique [0002] With the increasing number of long tunnel construction projects in railways and water conservancy projects and subway construction projects, the application of tunnel boring machines (hereinafter referred to as TBMs) is also becoming more and more extensive. The tunneling of TBM is based on a certain thrust, and the cutter ring of the disc-shaped hob (hereinafter referred to as the hob) installed at the front end of the cutter head rolls and squeezes the rock to achieve rock breaking. Therefore, in the tunneling process of TBM, the wear of hob cutter ring is the most important. [0003] The design and manufacturing technology of TBM hob is one of the core technologies of TBM. At the same time, auxiliary time and tool consumption costs such as tool inspec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/46C22C38/48C22C38/58C22C38/34C22C38/02C22C38/04C21D8/00C21D1/26C21D1/18C21D6/00
CPCC21D1/18C21D1/26C21D6/004C21D6/005C21D6/008C21D8/005C21D2211/008C22C38/02C22C38/04C22C38/34C22C38/44C22C38/46C22C38/48C22C38/58
Inventor 智小慧张传周张义敬智天琪
Owner 山东易斯特工程工具有限公司