{"id":3240,"date":"2018-03-02T17:02:51","date_gmt":"2018-03-02T14:02:51","guid":{"rendered":"https:\/\/energosteel.com\/en\/?p=3240"},"modified":"2018-03-25T21:18:45","modified_gmt":"2018-03-25T18:18:45","slug":"the-steel-grinding-balls-surface-hardness-measurement","status":"publish","type":"post","link":"https:\/\/energosteel.com\/pl\/the-steel-grinding-balls-surface-hardness-measurement\/","title":{"rendered":"The steel grinding balls surface hardness measurement"},"content":{"rendered":"<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/4zJHaCbLNpY\" width=\"810\" height=\"450\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">The grinding balls surface hardness defines on two diametrically opposite platforms.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">Four measurements perform at each platform for the hardness determination by Rockwell method.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">The first three measurements perform at the vertices of imaginary equilateral triangle with a side length from 5 to 8 mm. These measurements are tentative and the results don&#8217;t record in test report.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">The fourth measurement performs in the center of the triangle. This measurement\u2019s result records in test report.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">You can previously draw points in the measurement locations for easy measurements. Three dots draw in form of triangle vertices and a fourth dot draws in form of center this triangle.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">Four measurements must be providing according to Rockwell hardness measurement method (GOST 9013):<\/p>\n<ul>\n<li>The first three measurements are not counted after the change of the tip, the working table or stand.<\/li>\n<li>The prints number in the hardness measurement; the processing method and the measurements results indicate in the normative-technical documentation for metal products.<\/li>\n<\/ul>\n<p style=\"text-indent: 20px;\" align=\"justify\">This measurement technique indicates in the DSTU in order to press the tip against to the grinding ball surface in these three measurements and obtain a fourth measurement with a minimum error.<\/p>\n<p style=\"text-indent: 20px;\" align=\"justify\">The device dial have several scales:<\/p>\n<ul>\n<li>Scale C &#8211; a diamond cone with 120 \u00b0 angle at the apex and a 150 kgf load uses as indenter for measurements. Measure unit is HRC.<\/li>\n<li>Scale B &#8211; a 1\/16 inch ball of tungsten carbide (or hardened steel) and a 100 kgs load uses as an indenter for measurements. Measure unit is HRB.<\/li>\n<\/ul>\n<p style=\"text-indent: 20px;\" align=\"justify\">We perform a Rockwell hardness test on a scale C, i.e., the measurement provide by inserting into the sample an indenter &#8211; a diamond cone tip. The device dial arrows movement corresponds to 10 kgf preload at the first stop, and to 150 kgf full load at the second stop.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The grinding balls surface hardness defines on two diametrically opposite platforms. Four measurements perform at each platform for the hardness determination by Rockwell method. The first<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":4,"featured_media":3238,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"class_list":["post-3240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archive"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The steel grinding balls surface hardness measurement<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/energosteel.com\/the-steel-grinding-balls-surface-hardness-measurement\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"THE STEEL GRINDING BALLS SURFACE HARDNESS MEASUREMENT\" \/>\n<meta property=\"og:description\" content=\"The grinding balls surface hardness defines on two diametrically opposite platforms. 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