Shock resistant compound material and preparation thereof

A composite material and impact-resistant technology, applied in the direction of chemical instruments and methods, lamination, layered products, etc., can solve the problems of poor impact resistance and welding performance, noise pollution, cost increase, etc., to improve impact resistance, cushioning Material impact, convenient installation and welding effect

Inactive Publication Date: 2008-10-08
XI AN JIAOTONG UNIV
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Problems solved by technology

Since the alloy materials with high hardness and good wear resistance are all high-chromium alloy white cast iron, their welding performance is poor. In order to ensure the convenience of installation and maintenance, the wear-resistant materials generally selected in the above working conditions are basically low alloys with good welding performance. Carbon steel material, low alloy carbon steel material has relatively low hardness and poor wear resistance
For example: All the inclined baffles of the coal medium conveying chute close to the ground in a coal washing plant are made of low-alloy carbon steel. Due to the severe impact and wear, it is necessary to weld or add a layer of 16-18mm thick low-alloy carbon every three months or so. Steel wear-resistant plates, all chute slant baffles must be replaced once a year or so, including other coal medium conveying equipment, the consumption of wear-resistant materials is huge, the cost increases, and the management of production equipment and workers' maintenance and replacement The labor intensity is huge, which seriously affects the production efficiency
In addition, noise pollution caused by high impact wear is also one of the primary factors leading to a harsh environment
[0003] High-chromium alloy white cast iron with high carbon content and high hardness has superior wear resistance, but low toughness, poor impact resistance and poor welding performance; low-alloy carbon steel materials have good toughness and good welding performance, but low hardness and poor wear resistance. From the perspective of material research and application, it is difficult to find a single metal alloy material that is wear-resistant, impact-resistant, and can ensure welding performance, and is suitable for use under high-impact wear conditions
Although ceramic materials have high hardness and good wear resistance, they are brittle and cannot meet the requirements of use; polymer materials are impact-resistant and corrosion-resistant, but their wear resistance is poor, and due to high impact and wear, the temperature of the material's force-bearing surface rises. easy aging

Method used

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  • Shock resistant compound material and preparation thereof
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  • Shock resistant compound material and preparation thereof

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preparation example Construction

[0030] The preparation method of composite material of the present invention is described as follows:

[0031] Step 1, casting or welding the steel base layer. When the casting method is used, the steel base layer can be made of ordinary carbon steel, and the ingredients can refer to Table 1, and the general casting technology can be used.

[0032] Step 2, casting a high chromium alloy wear-resistant layer. The high chromium alloy wear-resistant layer can be made of high chromium alloy cast iron material and cast into a high chromium alloy cast iron grid block. The specific method is as follows:

[0033] (1) Dosing according to the ingredient requirements in Table 2;

[0034] (2) According to the size division of high chromium alloy cast iron grid blocks, design and process molds and shapes (sand molds);

[0035] (3) Smelting according to the ingredients in (1), reaching the temperature of 1480-1520°C before being released from the furnace, and pouring the molten iron into ...

Embodiment 1

[0040] Composites for impact wear resistance in inclined impact plates in coal production.

[0041] Step 1, casting or welding the steel base layer. In this embodiment, the casting method is adopted, and the steel base layer is made of ordinary carbon steel material, and the ingredients are referred to in Table 1, and the general casting technology is adopted.

[0042] Step 2, casting a high chromium alloy wear-resistant layer. The high chromium alloy wear-resistant layer can be made of high chromium alloy cast iron material and cast into a high chromium alloy cast iron grid block. The specific method is as follows:

[0043] (1) Dosing according to the ingredient requirements in Table 2, the determined final ingredients are (wt%): 2.8% C, 0.8% Mn, 0.8% Si, P≤0.03%, S≤0.03%, 29.0% Cr, 0.8% Mo, 1.0% Cu, 0.2% B, and the rest of Fe, among which P and S are impurities, are controlled below 0.03% respectively.

[0044] (2) According to the size division of the high chromium alloy...

Embodiment 2

[0051] Composite materials for impact wear resistance in the preparation of horizontal impact plates in the production of mineral aggregates

[0052] Step 1, casting or welding the steel base layer. The present embodiment 10mm steel plate is welded.

[0053] Step 2, casting a high chromium alloy wear-resistant layer. The high chromium alloy wear-resistant layer can be made of high chromium alloy cast iron material and cast into a high chromium alloy cast iron grid block. The specific method is as follows:

[0054] (1) Dosing according to the ingredient requirements in Table 2, the determined final ingredients are (wt%): 2.9% C, 0.6% Mn, 0.6% Si, P≤0.03%, S≤0.03%, 28.0% Cr, 0.6% Mo, 0.8% Cu, 0.3% B, and the rest are Fe, among which P and S are impurities, which are controlled below 0.03% respectively.

[0055] (2) According to the size division of high chromium alloy cast iron grid blocks, design and process molds and moldings (sand molds); the size of grid block 4 is 120mm×...

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Abstract

The invention relates to the field of anti-wear composite material and discloses a composite material used for resisting impact and wear and a preparation method. The composite material comprises a steel base bottom, a rubber intermediate layer and a high-chromium-alloy wear-resistant layer and the high-chromium-alloy wear-resistant layer is bonded with the steel base bottom through the rubber intermediate layer. The invention has the preparation method that the steel base bottom is cast or welded, then the high-chromium-alloy wear-resistant layer is cast; afterwards the rubber interlayer is vulcanized on the steel base layer and finally the high-chromium-alloy wear-resistant layer is vulcanized and bonded on the rubber intermediate layer. Resisting wear and impact, reducing noise and resisting erosion, the composite material prepared by the invention can be widely applied to the working situations where high impact and wear exists in the industries such as mine, power and machinery.

Description

technical field [0001] The invention relates to the field of anti-wear composite materials, in particular to a composite material for anti-impact wear and a preparation method thereof. Background technique [0002] High impact wear mainly includes chisel impact wear, high stress crushing abrasive wear, low stress abrasion friction wear, etc. Working conditions with high impact wear generally exist in mining, electric power, machinery and other industries, such as coal and other mineral materials delivery. The service materials used in high-impact wear conditions not only require good wear resistance, but also require high impact resistance, that is, good toughness. Since the alloy materials with high hardness and good wear resistance are all high-chromium alloy white cast iron, their welding performance is poor. In order to ensure the convenience of installation and maintenance, the wear-resistant materials generally selected in the above working conditions are basically lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/06B32B7/10B32B3/28B32B37/00C22C38/36
Inventor 鲍崇高邢建东高义民
Owner XI AN JIAOTONG UNIV
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