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Wear part and method of making the same

Inactive Publication Date: 2019-06-06
ESCO GRP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention enables the inclusion of hard particles into wear parts without degrading the matrix material properties. The particles can be coated to protect them from heat and chemical attack, and can include a metal carbide layer or a metal nitride layer or both. The use of such hard particles with local alloying can provide a longer useful life for all kinds of products exposed to abrasive wear. In a first embodiment of the invention, a wear part includes coated hard particles and an alloying element along a wear surface to limit the effect of brittle phases in the matrix material.

Problems solved by technology

This white iron is more brittle and tends to fracture under operating conditions which can limit retention of the particles and reduce service life of the surface with loss of the particles.
Alloying elements can also limit development of deleterious phases in matrix materials.

Method used

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  • Wear part and method of making the same
  • Wear part and method of making the same
  • Wear part and method of making the same

Examples

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Embodiment Construction

[0018]Many industrial operations involve tools and other parts that engage abrasive materials. For example, tools in mining and drilling operations are quickly worn away by cyclic material contact. Downtime for replacement of worn tools and components during industrial operations can significantly increase operating costs. Increasing the service life of wear members by increasing surface hardness limits downtime and increases operation efficiency.

[0019]Incorporating hard particles in a matrix forming the surface of a member can significantly increase wear resistance. The term “particle” is used herein as a broad term to encompass hard material in many different forms including, e.g., spheroids, powder, whiskers, etc. The hard material can also be included in other forms such as preforms or other larger blocks. Tools and parts can be formed by infiltration where a molten matrix material fills spaces between hard particles such as tungsten carbide packed in a mold. In a part manufactu...

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Abstract

Incorporating hard particles in a matrix forming the surface of a member can significantly increase wear resistance. Hard particles can degrade when they come in contact with a molten matrix material releasing constituent elements. These elements can locally degrade the matrix material on solidification. Coating the hard particles to limit contact with the matrix material and introducing an alloying element proximate the hard particles improve retention of the particles in the matrix.

Description

FIELD OF THE INVENTION[0001]This invention relates to component wear surfaces with embedded wear particles to increase hardness and limit erosion of the surface.BACKGROUND OF THE INVENTION[0002]Industrial applications put tools in cyclic contact with abrasive materials that remove the surface of the tool. Over the service life of the tool the abrasive materials wear away and erode the exposed tool surface until the tool has to be replaced. A harder surface for the tool can extend the service life of the tool by reducing the rate of wear during operation.[0003]Wear tools can be manufactured by casting, powder metallurgy infiltration or other techniques. Incorporating wear resistant particles or materials into the tool during forming of the part can limit erosion during operation to provide increased service life. Manufacturing processes, such as infiltration or casting, can incorporate wear resistant particles into the molten matrix material to improve wear properties. Constituents o...

Claims

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Application Information

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IPC IPC(8): E02F9/28B22D19/02C22C29/02C22C26/00
CPCE02F9/285B22D19/02C22C29/02C22C26/00B22F7/02B22F2999/00B22F2998/10C22C33/02C22C1/05B22F1/17B22F2007/045B22F5/007B22F2007/042Y10T29/49984B22D19/04
Inventor MONTROSS, CHARLES S.
Owner ESCO GRP LLC
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