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A wear-resistant alloy and its application in grinding tiles

A wear-resistant alloy and cemented carbide technology, which is applied to wear-resistant alloys and their application in coal mill grinding discs, can solve the problems of low comprehensive properties such as strength, hardness, toughness and service life, and achieve internal and external hardness. The effect of uniformity, increased efficiency, and improved tissue stability

Active Publication Date: 2014-10-08
SHENYANG WEIYUELI ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a wear-resistant alloy and its application in the grinding tile of a coal mill, so as to solve the problem of low comprehensive performance of wear-resistant materials in the prior art, such as strength, hardness, toughness and service life.

Method used

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  • A wear-resistant alloy and its application in grinding tiles
  • A wear-resistant alloy and its application in grinding tiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In this embodiment, by weight percentage, the chemical composition of the wear-resistant alloy is:

[0057] C0.33; Si1.0; Mn0.9; P0.035; S0.024; Cr23; Cu1.15; Mo2;

[0058] In this embodiment, the heat treatment process of the wear-resistant alloy includes the following steps:

[0059] 1. For normalizing, the temperature is gradually increased in stages and then rapidly cooled after heat preservation:

[0060] 200℃±10℃ for 30 minutes;

[0061] 400℃±10℃ for 60 minutes;

[0062] 600℃±10℃ for 90 minutes;

[0063] 800℃±10℃ for 60 minutes;

[0064] 1020℃±10℃ for 4 hours;

[0065] Air cooling to room temperature by means of fan blowing;

[0066] 2. Tempering, natural cooling after heat preservation in stages with gradually rising temperature:

[0067] 200℃±10℃ for 180 minutes;

[0068] 380℃±10℃ for 60 minutes;

[0069] 450℃±10℃ for 6 hours;

[0070] Cool naturally to room temperature.

[0071] In this embodiment, after adopting the described alloy composition and h...

Embodiment 2

[0075] In this embodiment, by weight percentage, the chemical composition of the wear-resistant alloy is:

[0076] C0.32; Si1.1; Mn0.8; P0.028; S0.033; Cr24; Cu1.1; Mo3; Al0.1; V0.6; B0.02; .

[0077] In this embodiment, the heat treatment process of the wear-resistant alloy includes the following steps:

[0078] 1. For normalizing, the temperature is gradually increased in stages and then rapidly cooled after heat preservation:

[0079] 200℃±10℃ for 20 minutes;

[0080] 400℃±10℃ for 70 minutes;

[0081] 600℃±10℃ for 80 minutes;

[0082] 800℃±10℃ for 70 minutes;

[0083] 1020℃±10℃ for 3 hours;

[0084] Air cooling to room temperature by means of fan blowing;

[0085] 2. Tempering, natural cooling after heat preservation in stages with gradually rising temperature:

[0086] 200℃±10℃ for 150 minutes;

[0087] 380℃±10℃ for 70 minutes;

[0088] 450℃±10℃ for 5 hours;

[0089] Cool naturally to room temperature.

[0090] In this embodiment, after adopting the described a...

Embodiment 3

[0094] In this embodiment, by weight percentage, the chemical composition of the wear-resistant alloy is:

[0095] C0.35; Si0.9; Mn1.0; P0.035; S0.026; Cr22; Cu1.2; Mo1; Al0.2; V0.4; B0.04; .

[0096] In this embodiment, the heat treatment process of the wear-resistant alloy includes the following steps:

[0097] 1. For normalizing, the temperature is gradually increased in stages and then rapidly cooled after heat preservation:

[0098] 200℃±10℃ for 40 minutes;

[0099] 400℃±10℃ for 50 minutes;

[0100] 600℃±10℃ for 100 minutes;

[0101] 800℃±10℃ for 50 minutes;

[0102] 1020℃±10℃ for 5 hours;

[0103] Air cooling to room temperature by means of fan blowing;

[0104] 2. Tempering, natural cooling after heat preservation in stages with gradually rising temperature:

[0105] 200℃±10℃ for 200 minutes;

[0106] 380℃±10℃ for 50 minutes;

[0107] 450℃±10℃ for 7 hours;

[0108] Cool naturally to room temperature.

[0109] In this embodiment, after adopting the described ...

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Abstract

The invention relates to the field of a wear-resistant material and an application thereof, and in particular relates to a wear-resistant alloy and an application thereof in a millstone tile of a coal mill, which are used for solving the problems that the wear-resistant material in the prior art has lower comprehensive performance in strength, hardness, toughness, service life and the like. The wear-resistant alloy comprises the following chemical components in percentage by weight: 0.32-0.35% of C, 0.9-1.1% of Si, 0.8-1.0% of Mn, less than or equal to 0.04% of P, less than or equal to 0.04% of S, 22-24% of Cr, 1.1-1.2% of Cu, 1-3% of Mo, 0.1-0.2% of Al, 0.4-0.6% of V, 0.02-0.004% of B, 0.3-0.5% of rare earth element and the balance of Fe. The millstone tile is subjected to sand casting and casting molding by use of the wear-resistant alloy. By adopting the specific alloy components and the heat treatment technology, the service life of the produced millstone tile is not shorter than twice the average service life of the like products; the millstone tile still can be used normally after 19,859 hours of test use, thereby indicating good performance of the product; and moreover, the labor intensity of workers can be reduced, and the efficiency can be improved.

Description

technical field [0001] The invention relates to the field of wear-resistant materials and their applications, in particular to a wear-resistant alloy and its application in grinding tiles of coal mills. Background technique [0002] According to the statistics of relevant departments, the annual market demand for wear-resistant materials in my country is about 3.5-4 million tons, mainly used in industries such as electric power, mining, metallurgy, transportation, and building materials, among which the demand for power industry is about 870,000 tons. , totaling more than 9 billion yuan, is an industry with great demand. [0003] Wear-resistant alloy steel is a kind of special performance steel used in wear conditions. Its main characteristics are high strength, hardness, toughness and wear resistance under wear conditions. Wear-resistant alloy steel is divided into three categories according to the content of chemical elements: the first type of wear-resistant low-alloy ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C21D1/28C21D1/18B22D19/00B02C7/11
Inventor 夏金利
Owner SHENYANG WEIYUELI ELECTRICAL EQUIP
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