Metal-Matrix Composites and Thermal Spray Coatings for Earth Moving Machines

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Description

In an effort to realize minimum of a 2x increase in wear life of ground engaging components used on mining machines, two potentially cost effective processes were explored for the production of tailored, highly abrasion resistant materials: (1) hybrid pressure casting of steel composites, and (2) arc lamp fusing of thermal spray coatings. Steel composites comprised of cermet or oxide hard particles were successfully produced using pressure casting processes, although a cost effective process has not yet been identified for oxide particles. Both composites achieved project wear targets in high stress gouging wear, but the cermet composites did not meet ... continued below

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127 pages

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Weaver, D. Trent; Kiser, Matthew T.; Zok, Frank W.; Levi, Carlos G. & Hawk, Jeffrey February 1, 2004.

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Description

In an effort to realize minimum of a 2x increase in wear life of ground engaging components used on mining machines, two potentially cost effective processes were explored for the production of tailored, highly abrasion resistant materials: (1) hybrid pressure casting of steel composites, and (2) arc lamp fusing of thermal spray coatings. Steel composites comprised of cermet or oxide hard particles were successfully produced using pressure casting processes, although a cost effective process has not yet been identified for oxide particles. Both composites achieved project wear targets in high stress gouging wear, but the cermet composites did not meet the targets in impact wear, due to poor matrix toughness resulting from particle dissolution. Oxide composites had superior toughness and are expected to meet impact wear goals. Arc lamp processing of thermal spray coatings was successfully demonstrated to produce a metallurgical bond at the coating interface. Functionally graded materials were developed and successfully fused to allow for the accommodation of thermal process stresses in an intermediate layer. Ultimately, three functionally graded materials were identified as having high stress, three-body abrasion resistance sufficient to exceed project goals.

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127 pages

Notes

OSTI as DE00833402

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  • Other Information: PBD: 1 Feb 2004

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  • Report No.: NONE
  • Grant Number: FC26-01NT41054
  • DOI: 10.2172/833402 | External Link
  • Office of Scientific & Technical Information Report Number: 833402
  • Archival Resource Key: ark:/67531/metadc780739

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • March 16, 2018, 12:23 p.m.

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Weaver, D. Trent; Kiser, Matthew T.; Zok, Frank W.; Levi, Carlos G. & Hawk, Jeffrey. Metal-Matrix Composites and Thermal Spray Coatings for Earth Moving Machines, report, February 1, 2004; United States. (digital.library.unt.edu/ark:/67531/metadc780739/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.