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Laser assisted interstitial alloying for improved wear resistance

A wear-resistant, laser technology, applied in the direction of metal layered products, chemical instruments and methods, metal material coating technology, etc.

Active Publication Date: 2016-02-10
DM3D TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Attempts to improve control over interstitial alloying have not proven effective

Method used

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  • Laser assisted interstitial alloying for improved wear resistance
  • Laser assisted interstitial alloying for improved wear resistance
  • Laser assisted interstitial alloying for improved wear resistance

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Embodiment Construction

[0018] see figure 1 , generally at 10 a metallic substrate in the form of a planar part. Forming the metallic substrate 10 from metals such as various steels, nickel alloys, cobalt alloys, aluminum alloys, and copper alloys is contemplated. It is contemplated that substrate 10 may be machined or formed into its final shape by grinding, machining or turning, as known to those skilled in the art. The inventors contemplate the substrate 10 as any substrate 10 that is subject to friction or other mechanical forces known to degrade the geometry and function of the substrate 10 .

[0019] It is believed that cutting tools, mechanical parts such as piston heads, other internal combustion engine components and any metallic parts that are subject to wear can be strengthened by the method of the present invention. After processing, it is desirable for the substrate 10 to include a surface roughness having an Ra value of less than about 20 microns and an Rt value of less than about 100...

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Abstract

A method of enhancing wear resistance of a metallic substrate includes applying a coating of an interstitial element to a surface of a substrate. A laser beam is directed onto a localized area of the metallic substrate coated with the interstitial element locally raising a temperature of the metallic substrate to a temperature causing the interstitial element to diffuse into the substrate. A layer of alloy including the interstitial element is generated onto the localized area of the metallic substrate. A focal point of the laser beam is disposed at a location spaced from the surface of the substrate for optimizing a power density of the laser beam at the surface of the substrate. The coating of interstitial element not diffused into the substrate is removed exposing the layer of alloy including the interstitial element.

Description

[0001] Existing application [0002] This application claims priority to US Provisional Patent Application Serial No. 61 / 813,297, filed April 18, 2013. technical field [0003] The present invention generally relates to an improved method for increasing the hardness of soft metallic substrates. More specifically, the present invention relates to the use of laser assisted interstitial alloying of soft metallic substrates. Background technique [0004] There is a dichotomy when selecting metallic substrates for industrial processes or mechanical devices subject to frictional forces. During the manufacturing process or forming process, it is preferred to choose a soft material for easy shaping. However, choosing a soft material for the substrate will result in poor durability, especially when the device is subjected to frictional forces. Therefore, when durability of mechanical devices is required, hard metallic substrates are chosen, which pose problems when manufacturing o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/06B32B15/00C21D1/09
CPCC21D1/09C23C8/00C23C24/04C21D1/72C21D1/68C23C24/082
Inventor B·杜塔
Owner DM3D TECH