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High-hardness high-toughness ZW552 steel for heading machine cutter ring

A high-toughness, roadheader technology, applied in the field of steel alloys, can solve the problems of strength and toughness not meeting hard rock formations, cost and efficiency waste, etc.

Active Publication Date: 2019-07-02
唐山志威科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mainstream roadheader cutter ring materials are mainly derived steel grades based on H13 (4Cr5MoSiV1) with 10% carbon content added, but its strength and toughness cannot meet the work of hard rock formations, resulting in frequent replacement of cutter rings, resulting in cost and waste of efficiency

Method used

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  • High-hardness high-toughness ZW552 steel for heading machine cutter ring
  • High-hardness high-toughness ZW552 steel for heading machine cutter ring
  • High-hardness high-toughness ZW552 steel for heading machine cutter ring

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-hardness, high-toughness ZW552 steel for roadheader cutter rings, the chemical composition and percentage of the steel are:

[0036] C 0.48%,

[0037] Si 0.26%,

[0038] Mn 0.38%,

[0039] Cr 5.12%,

[0040] Mo 2.31%,

[0041] V 0.58%,

[0042] Nb 0.011%,

[0043] P 0.010%,

[0044] S 0.0009%,

[0045] Ni 0.010%,

[0046] Cu 0.005%,

[0047] Ti 0.004%,

[0048] The balance is Fe and unavoidable impurities;

Embodiment 2

[0050] A high-hardness, high-toughness ZW552 steel for roadheader cutter rings, the chemical composition and percentage of the steel are:

[0051] C 0.50%,

[0052] Si 0.23%,

[0053] Mn 0.39%,

[0054] Cr 5.10%,

[0055] Mo 2.26%,

[0056] V 0.57%,

[0057] Nb 0.009%,

[0058] P 0.010%,

[0059] S 0.0007%,

[0060] Ni 0.010%,

[0061] Cu 0.005%,

[0062] Ti 0.003%,

[0063] The balance is Fe and unavoidable impurities

Embodiment 3

[0065] A high-hardness, high-toughness ZW552 steel for roadheader cutter rings, the chemical composition and percentage of the steel are:

[0066] C 0.51%,

[0067] Si 0.20%,

[0068] Mn 0.37%,

[0069] Cr 5.13%,

[0070] Mo 2.32%,

[0071] V 0.60%,

[0072] Nb 0.008%,

[0073] P 0.011%,

[0074] S 0.0010%,

[0075] Ni 0.010%,

[0076] Cu 0.005%,

[0077] Ti 0.003%,

[0078] The balance is Fe and unavoidable impurities;

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Abstract

The invention relates to a high-hardness high-toughness ZW552 steel for a heading machine cutter ring. The steel comprises, by mass percent, 0.45 to 0.55% of C, not larger than 0.30% of Si, 0.30 to 0.50% of Mn, 4.80 to 5.50% of Cr, 2.00 to 2.40% of Mo, 0.50 to 0.70% of V, 0.005 to 0.080% of Nb, not larger than 0.015% of P, not larger than 0.003% of S, not larger than 0.020% of Ni, not larger than0.010% of Cu, not larger than 0.005% of Ti and the balance Fe and inevitable impurities. Through improving of the C content and adding of trace Nb, content of residual elements of P, S, Ni, Cu, Ti andthe like can be controlled, the microstructure can be reasonably designed, the use hardness of the cutter ring can be greatly improved, toughness is reduced, and the property needs of high hardness,high toughness, high wear resistance and strict use conditions are met.

Description

technical field [0001] The invention belongs to the field of steel alloys, and in particular relates to a new ZW552 steel product with high hardness and high toughness, which is suitable for use in roadheader cutter rings under hard geological conditions. Background technique [0002] As a wearing part of the working part of the shield machine, the cutter ring of the roadheader accounts for about one-third of the tunnel construction cost. At present, the mainstream roadheader cutter ring material is mainly a derivative steel grade with 10% carbon content added on the basis of H13 (4Cr5MoSiV1), but its strength and toughness cannot meet the work of hard rock formations, resulting in frequent replacement of cutter rings, resulting in cost and waste of efficiency. This technology increases the content of C, Mo and other elements, reduces the content of Si and V, and adds trace element Nb, while controlling the residual element Ti. Increase the C content and alloy content of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/42C22C38/50E21D9/08
CPCC22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50E21D9/08
Inventor 刘道献姚宏康曹立军赵伟东蒋大鹏关海龙张长春张健宋文建邵智勇刘海坤潘成明
Owner 唐山志威科技有限公司
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