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A metal-ceramic composite wear-resistant product and its preparation method

A metal-ceramic composite and metal-ceramic technology, which is applied in the field of preparation of wear-resistant and wearing parts, can solve the problems of low comprehensive mechanical properties, waste, wear resources, etc., and achieve the effects of perfect mechanical properties, stable product quality, and guaranteed service life.

Active Publication Date: 2016-08-03
湖北秦鸿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now by adjusting the design of the alloy composition, strictly controlling the content of carbon and silicon, improving the shape and distribution of carbides to improve its toughness, its performance is HRC: 45-50, because the cementite-type carbides contained in the low-chromium balls used are on the The splitting effect of the matrix is ​​still strong, so its comprehensive mechanical properties are low
[0009] In addition, the grinding balls, lining boards and hammer heads of the crusher are also subjected to high stress impact during the working process. If the hardness is too high, the toughness will decrease, which will lead to the occurrence of fatigue peeling and crushing of such wear-resistant parts during use. If the hardness is too low, it will wear out in a short time and cause a waste of resources.

Method used

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  • A metal-ceramic composite wear-resistant product and its preparation method
  • A metal-ceramic composite wear-resistant product and its preparation method
  • A metal-ceramic composite wear-resistant product and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation method of the present invention used as ball mill grinding ball in cement plant

[0052] First, silicon carbide ceramic particles with a particle size of 3-4 mm in diameter and metal powder with a particle size of 100 mesh to 200 mesh (including 25% of high-carbon ferrochrome metal powder, 1% of molybdenum iron powder, 73% of iron powder, and 1% of carbon powder ) is mixed uniformly with zinc stearate to obtain a mixture, wherein silicon carbide particles account for 50% of the total weight of the metal powder, and zinc stearate accounts for 0.2% of the total weight of the metal powder.

[0053] 1. Pour the mixture into a ball mold with a diameter of 100mm, and compact it with a pressure of 300MPa on a press.

[0054] 2. After demolding, put the metal-ceramic mixture prefabricated part into the atmosphere furnace for sintering to obtain semi-finished grinding balls.

[0055] 3. The atmosphere in the atmosphere furnace is decomposed ammonia gas, the sint...

Embodiment 2

[0060] Preparation method of the present invention used as grinding ball for power plant coal mill

[0061] First, mix aluminum oxide ceramic particles with a particle size of 2-3mm and metal powder with a particle size of 100-200 mesh (including 10% high-carbon ferrochrome metal powder, 87.5% iron powder, and 2.5% carbon powder) with engine oil A homogeneous mixture was obtained. Among them, aluminum oxide ceramic particles account for 40% of the total weight of the metal powder, and engine oil accounts for 1% of the total weight.

[0062] 1. Pour the mixture into a ball mold with a diameter of 60mm, and compact it with a pressure of 250MPa on a press.

[0063] 2. After demolding, put the metal-ceramic mixture prefabricated part into the atmosphere furnace for sintering to obtain semi-finished grinding balls.

[0064] 3. The atmosphere in the atmosphere furnace is decomposed ammonia gas, the sintering temperature is 1220°C, and the sintering time is 30 minutes.

[0065] 4....

Embodiment 3

[0069] The preparation method of the present invention used as ball mill grinding balls for mine concentrators

[0070] First, zirconia ceramic particles with a particle size diameter of 2 mm and metal powder with a particle size of 100 mesh to 200 mesh (including 15% of high-carbon ferrochromium metal powder, 83.2% of iron powder and 1.8% of carbon powder) are mixed with water to obtain a mixture. Among them, zirconia ceramic particles account for 30% of the total weight of the metal powder, and water accounts for 2% of the total weight.

[0071] 1. Pour the mixture into a ball mold with a diameter of 50MM, and compact it with a pressure of 220Mpa on a press.

[0072] 2. After demoulding, put the mixture preform into the atmosphere furnace for sintering.

[0073] 3. The atmosphere in the atmosphere furnace is decomposed ammonia gas, the sintering temperature is 1250°C, and the sintering time is 45 minutes. Get semi-finished grinding balls.

[0074] 4. Put the semi-finished...

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Abstract

The invention provides an anti-abrasion metal-ceramic composite product and a preparation method thereof. The structural performance of the product is improved through at least one type of metallic oxides, metal nitrides or metal borides and intermetallic compounds. Metal-ceramic particle prefabricated parts made of ceramic particles and metal powder, or metal-ceramic particle prefabricated parts made of metal powder and mixtures which are obtained through uniform mixing of ceramic particles and metal powder with auxiliaries are subjected to high-temperature sintering thermal treatment to obtain the product. According to the anti-abrasion metal-ceramic composite product and the preparation method thereof, abrasion resistance of ceramic particles and mechanical performances of metal materials are perfectly combined, so that the hardness and the abrasion resistance of traditional metal materials are greatly improved. Compared with traditional anti-abrasion parts, the service life of metal grinding balls is increased by 1 time to 1.9 times, and the service life of liner plates and hammers is increased by more than 2.5 times, accordingly, a large number of metal materials are saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a method for preparing wear-resistant wearing parts suitable for grinding and crushing equipment such as ball mills, crusher roller presses, etc. in mining, electric power, cement, and other industries. Background technique [0002] Ball mills, crushers, and roller presses are key equipment widely used for grinding materials in building materials, mining, metallurgy, electric power and other industries. Grinding balls, liners and hammers are the most commonly used grinding media in ball mills and crushers. The part with the largest consumption of wearing parts in the industry; with the continuous development of various industries, the specific surface area and fineness of materials are more and more required, and it is particularly important for enterprises to choose the correct material for grinding bodies. The grinding body with high wear resistance can not only improve the grinding efficiency, reduce the number and time of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16B22F3/24
Inventor 张轶
Owner 湖北秦鸿新材料有限公司
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