{"id":7988,"date":"2019-05-17T12:14:13","date_gmt":"2019-05-17T12:14:13","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/37291662\/NEWS\/"},"modified":"2023-02-07T04:47:58","modified_gmt":"2023-02-07T04:47:58","slug":"erosive-wear-testing-of-laser-clad-and-hvof-coatings-for-drilling-in-mining","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/erosive-wear-testing-of-laser-clad-and-hvof-coatings-for-drilling-in-mining\/","title":{"rendered":"Erosive Wear Testing of Laser Clad and HVOF Coatings for Drilling in Mining"},"content":{"rendered":"<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><span style=\"font-size:12.0pt\">This ITSC presentation focuses on the fact that drilling is a major cost factor to mining operations (exploration, drill and blast operations), and wear of components is a significant driver of drilling costs. For drilling, especially in hard rocks, rotary drills do not deliver satisfactory results.&nbsp; Instead, down-the-Hole (DTH) hammers or Reverse Circulation (RC) hammers are used. These drills break the rock through repetitive impact. Cuttings are removed via a high velocity air stream. The main wear mechanism for these hammers was found to be erosion.<\/span><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><span style=\"font-size:12.0pt\">To combat erosive wear laser clad coatings with a Ni-matrix and different sized fused tungsten carbides FTC (WC\/W2C) (angular and spherical) and monocrystalline WC were developed. Moreover, hard Fe-based HVOF coatings were investigated and a wear-resistant steel served as a reference.<\/span><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><span style=\"font-size:12.0pt\">An erosion testing apparatus which follows ASTM G76 was developed. Testing was carried out at 15 to 90 degree angles in 15-degree steps for all materials. Coating performance was assessed via volume loss, obtained using 3D profilometry. At low angles, the more brittle materials lost significantly less volume, but at a 90-degree angle the wear resistant steel performs almost as well as a hard phase loaded coating. Laser clad coatings with spherical FTC showed overall a better performance than coatings with angular FTC.<\/span><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><i><span style=\"font-size:12.0pt\">Dr. Thomas Schlaefer, LaserBond Ltd, Cavan, Australia<\/span><\/i><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><i><span style=\"font-size:12.0pt\">Dr. Christiane Schulz , Dr. Eric Charrault , Dr. Colin Hall , University of South Australia, Mawson Lakes, Australia<\/span><\/i><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><span style=\"font-size:12.0pt\">Tuesday, May 28, 2019: 15:30<\/span><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\"><span style=\"line-height:normal\"><span style=\"font-size:12.0pt\">Annex Hall\/F203 (Pacifico Yokohama)<\/span><\/span><\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n<p style=\"margin-bottom:.0001pt\">&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This ITSC presentation focuses on the fact that drilling is a major cost factor to mining operations (exploration, drill and blast operations), and wear of components is a significant driver of drilling costs.<\/p>\n","protected":false},"author":63082,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7988","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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