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Composite wear component

A technology of wear parts and composite materials, applied in metal processing equipment, transportation and packaging, grain processing, etc., can solve the problem of TiC concentration reduction

Active Publication Date: 2021-12-10
MAGOTTEAUX INT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this also reduces the maximum achievable TiC concentration in the final wear part, and in practice the aforementioned theoretical concentration of 72.2% can no longer be achieved on a production scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0105] Pellet preparation:

[0106] The following raw materials are used for 3 different types of ceramic-metal composite pellets:

[0107] ·TiC powder less than 325 mesh

[0108] ·Iron powder is less than 325 mesh

[0109] ·Manganese powder is less than 325 mesh

[0110] ·Nickel powder less than 325 mesh

[0111] Composition (wt%) Example 1 Example 2 Example 3 TiC 45.0 65.0 85.0 Fe 44.8 28.5 12.2 mn 7.7 4.9 2.1 Ni 2.5 1.6 0.7 total 100.0 100.0 100.0 Theoretical sintered density 6.22 5.68 5.22

[0112] Table 1

[0113] Powders of composition according to Table 1 have been mixed and ground in a ball mill for 24 h with alcohol and metal balls to reach an average particle size of 3 μm.

[0114] An organic wax binder at 4 wt% of the powder was added and mixed with the powder. Alcohol was removed through a vacuum dryer equipped with rotating blades (alcohol was condensed for reuse). The resulting agglome...

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Abstract

The present invention discloses a hierarchical composite wear component comprising a reinforcement in the most exposed part to wear, the reinforcement comprising a three-dimensionally interconnected network of periodically alternating millimetric ceramic-metal composite granules with millimetric interstices, said ceramic-metal composite granules comprising at least 52 vol%, preferably at least 61 vol%, more preferably at least 70 vol% of micrometric particles of titanium carbide embedded in a first metal matrix, the ceramic-metal composite granules having a density of at least 4.8 g / cm³, the three-dimensionally interconnected network of ceramic-metal composite granules with its millimetric interstices being embedded in the second metal matrix, said reinforcement comprising in average at least 23 vol%, more preferably at least 28 vol%, most preferably at least 30 vol% of titanium carbide, the first metal matrix being different from the second metal matrix, the second metal matrix comprising the ferrous cast alloy.

Description

technical field [0001] The present invention relates to a graded composite wear part with improved resistance to combined wear / impact stresses obtained by casting techniques. The wear part comprises a three-dimensional network of aggregated millimeter-scale ceramic-metal composite particles with millimeter-scale interstices in which TiC-based micron-sized particles are embedded in a binder called a first metal matrix, the millimeter-scale interstices being defined by the present invention. A cast metal fill known as a secondary metal matrix. Background technique [0002] The present invention relates to wear components used in grinding and crushing industries such as cement plants, quarries and mines. These parts are often subject to high mechanical stress on the body and high friction and wear on the working face. Therefore, it is desirable that these parts should exhibit high wear resistance and some degree of ductility in order to be able to withstand mechanical stresse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/02B22F3/02B22F3/10C22C29/10C22C30/00
CPCB22D19/02B22F3/02B22F3/1021C22C29/10C22C29/067B22F3/1035C22C30/00B22D19/14C22C1/055B22F2998/10C22C33/0285C22C32/0052B02C2210/02B02C13/185C22C1/051B22F2009/042B22F3/18B22F9/04B22F3/1007C22C33/0242B22F1/148B22F3/12B22F2302/10B22F2201/20B22F2203/11B22F2301/35B22F2304/10
Inventor 斯蒂芬·德西莱斯弗朗索瓦·勒普特布尔汗·塔斯
Owner MAGOTTEAUX INT SA
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