{"id":4310,"date":"2020-11-23T00:53:00","date_gmt":"2020-11-23T05:53:00","guid":{"rendered":"https:\/\/dev26.lecowebtest.com\/news\/\/"},"modified":"2026-07-10T13:16:16","modified_gmt":"2026-07-10T17:16:16","slug":"le-processus-de-preparation-metallographique","status":"publish","type":"post","link":"https:\/\/www.leco.com\/fr\/news\/the-process-of-metallographic-preparation\/","title":{"rendered":"Le processus de pr\u00e9paration m\u00e9tallographique"},"content":{"rendered":"<div class=\"wp-block-group is-style-leco-vertical-margin-top has-global-padding is-layout-constrained wp-container-core-group-is-layout-875e403b wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group leco-published-on is-nowrap is-layout-flex wp-container-core-group-is-layout-70236872 wp-block-group-is-layout-flex\">\n<p class=\"wp-block-paragraph\">Publi\u00e9 le<\/p>\n\n\n<div style=\"line-height:1\" class=\"wp-block-post-date has-custom-1-font-size\"><time datetime=\"2020-11-23T00:53:00-05:00\">23 novembre 2020<\/time><\/div><\/div>\n\n\n\n<h1 class=\"wp-block-heading is-style-h2-style\">Le processus de pr\u00e9paration m\u00e9tallographique<\/h1>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\"><figure class=\"is-style-rounded wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Le processus de pr\u00e9paration m\u00e9tallographique\" style=\"object-fit:cover;\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720.png 1280w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720-300x169.png 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720-1024x576.png 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720-768x432.png 768w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/the-process-of-metallographic-preparation_1280x720-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\"><\/figure><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-1ea9787f wp-block-group-is-layout-constrained\" style=\"margin-top:48px\">\n<div class=\"leco-share-article align-left wp-block-create-block-leco-share-article\">\n\t<div class=\"share-article-wrapper\">\n\t\t<button class=\"share-article-button\" data-url=\"https:\/\/www.leco.com\/fr\/news\/the-process-of-metallographic-preparation\/\" aria-label=\"Partager l&#039;article\">\n\t\t\tPartager l'article\t\t<\/button>\n\t\t<span class=\"share-article-copied\" aria-live=\"polite\" aria-atomic=\"true\">\n\t\t\tLien de l'article copi\u00e9\t\t<\/span>\n\t<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">To accurately perform a metallographic analysis of a sample, the preparation is critical. The microstructure and hardness of your sample has to be unveiled, and you have to be able to trust that what you\u2019re seeing is what is actually there and not just something inadvertently created in the preparation stages. When it comes to metallographic preparation, you really can\u2019t skip a step.<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-image size-full is-style-rounded-full-width\" style=\"margin-bottom:var(--wp--preset--spacing--60)\"><img loading=\"lazy\" decoding=\"async\" width=\"638\" height=\"199\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-the-process-of-metallographic-preparation-041626.webp\" alt=\"LECO - News - The Process of Metallographic Preparation\" class=\"wp-image-4150\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-the-process-of-metallographic-preparation-041626.webp 638w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-the-process-of-metallographic-preparation-041626-300x94.webp 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-the-process-of-metallographic-preparation-041626-18x6.webp 18w\" sizes=\"auto, (max-width: 638px) 100vw, 638px\" \/><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A proper metallographic preparation of a sample such as carburized steel has five or six steps, depending on the type of analysis you need done. The first step is <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/sectionnement\/\" target=\"_blank\" data-type=\"page\" data-id=\"2374\" rel=\"noreferrer noopener\">Sectionnement<\/a>. A thorough analysis does not require the entire part, but rather, just a representative sample. Sectioning the component in question brings a potentially bulky part down to a workable cross section exposing the area to be analyzed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After sectioning the sample, it must be <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/montage\/\" target=\"_blank\" data-type=\"page\" data-id=\"2373\" rel=\"noreferrer noopener\">mounted<\/a>. The sample is secured in an appropriate mounting material that allows for sharp edge retention and will grind away at the same rate as the sample in future preparation steps. While there are shortcuts that can reduce the time or expense of mounting samples, there are no shortcuts for using the proper temperature, time, and pressure during the process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A mounted sample then needs <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/broyage\/\" target=\"_blank\" data-type=\"page\" data-id=\"2368\" rel=\"noreferrer noopener\">broyage <\/a>to create a flat and even surface. Any potential residue from the mounting process or damage from the sectioning process needs to be removed to expose the actual microstructure of the sample. It\u2019s important to keep flushing the debris away from sample as it is ground, and the grinding step should not be considered finished if the sample doesn\u2019t look uniform at the end.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.leco.com\/fr\/broyage\/\">Polish<\/a><a href=\"https:\/\/www.leco.com\/fr\/metallographie\/broyage\/\" data-type=\"page\" data-id=\"2368\">i<\/a><a href=\"https:\/\/www.leco.com\/fr\/broyage\/\">ng <\/a>the sample removes the deeper scratches left by the rougher grinding abrasives. The surface becomes shiny and reflective, and any remaining defects should be indicative of flaws in the sample itself, rather than a creation of the metallographic preparation process. It is not enough to simply grind a sample flat for an accurate microhardness analysis. Scratches left on the sample can deform the hardness test indents and cause inaccuracies in the readings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are analyzing the microstructure of your sample, you will want to etch it immediately after polishing, to prevent oxidation from affecting your results. Especially when starting out etching, it is better to perform this process in several smaller steps than to try to fully etch the sample in one go. As Dave Coulston, LECO\u2019s Corporate Metallurgist, likes to say: \u201cYou can\u2019t unbake a cake.\u201d If you over-etch a sample, there is no going back.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether or not you etch your sample, the metallographic analysis is the final step. Through <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/essai-de-durete\/\" target=\"_blank\" data-type=\"page\" data-id=\"2369\" rel=\"noreferrer noopener\">essai de duret\u00e9<\/a> ou <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/microscopes\/\" data-type=\"page\" data-id=\"2371\">microscopic<\/a> <a href=\"https:\/\/www.leco.com\/fr\/metallographie\/imagerie\/\" data-type=\"page\" data-id=\"2370\">image analysis<\/a>, more of the makeup of your sample can be revealed.<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">En savoir plus<\/h2>\n\n\n<div class=\"leco-event-rows wp-block-create-block-leco-event-rows\">\n\t\t<div class=\"leco-event-rows__row\">\n\t\t<div class=\"leco-event-rows__split\">\n\n\t\t\t<!-- Left: Featured image -->\n\t\t\t<div class=\"leco-event-rows__image-col\">\n\t\t\t\t<figure class=\"wp-block-image size-full is-style-rounded-full-width\">\n\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/metals-minerals-ores-header_v02-1-1024x576.jpg\" alt=\"pi\u00e8ces m\u00e9talliques rondes avec engrenages int\u00e9gr\u00e9s\" style=\"aspect-ratio:4\/3;object-fit:cover\">\n\t\t\t\t<\/figure>\n\t\t\t<\/div>\n\n\t\t\t<!-- Right: Content -->\n\t\t\t<div class=\"leco-event-rows__content-col\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"leco-event-rows__title is-style-h4-style\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.leco.com\/fr\/events\/webinar\/metallographic-preparation-and-analysis-of-carburized-steel\/\">\n\t\t\t\t\t\t\tPr\u00e9paration et analyse m\u00e9tallographiques de l'acier c\u00e9ment\u00e9\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"leco-event-rows__excerpt\">\n\t\t\t\t\t\tDave Coulston goes into more detail on the metallographic preparation and analysis process in the first of <a href=\"https:\/\/www.leco.com\/fr\/evenements\/webinaire\/preparation-et-analyse-metallographiques-de-lacier-cemente\/\" data-type=\"event\" data-id=\"3751\">LECO\u2019s webinars on steel analysis.<\/a>\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"leco-event-rows__date\">\n\t\t\t\t\t\tOn Demand\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n\t\t\t\t\t<div class=\"wp-block-button\">\n\t\t\t\t\t\t<a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.leco.com\/fr\/events\/webinar\/metallographic-preparation-and-analysis-of-carburized-steel\/\">\n\t\t\t\t\t\t\tEnregistrer\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n\t<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-style-full-bleed has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">Nouvelles connexes<\/h2>\n\n\n\n<div 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class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure style=\"aspect-ratio:16\/9\" class=\"is-style-rounded wp-block-post-featured-image\"><a href=\"https:\/\/www.leco.com\/fr\/news\/thank-you-2026-summer-interns\/\" target=\"_self\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"660\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Merci, les stagiaires d&#039;\u00e9t\u00e9 2026 !\" style=\"width:100%;height:100%;object-fit:cover;\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026.jpg 1800w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-300x110.jpg 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-1024x375.jpg 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-768x282.jpg 768w, 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The microstructure and hardness of your sample has to be unveiled, and you have to be able to trust that what you\u2019re seeing is what is actually there and not just something inadvertently created in [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":6735,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"instrument-model":[],"core-analysis-type":[29],"application-type":[37],"product-line":[51,53,16,136,52,50],"class_list":["post-4310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","core-analysis-type-sample-prep-hardness-testing","application-type-metals-ores","product-line-grinding-polishing","product-line-hardness-testing","product-line-metallography","product-line-microscopes","product-line-mounting","product-line-sectioning"],"_links":{"self":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts\/4310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/comments?post=4310"}],"version-history":[{"count":1,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts\/4310\/revisions"}],"predecessor-version":[{"id":6748,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts\/4310\/revisions\/6748"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/media\/6735"}],"wp:attachment":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/media?parent=4310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/categories?post=4310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/tags?post=4310"},{"taxonomy":"instrument-model","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/instrument-model?post=4310"},{"taxonomy":"core-analysis-type","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/core-analysis-type?post=4310"},{"taxonomy":"application-type","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/application-type?post=4310"},{"taxonomy":"product-line","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/product-line?post=4310"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}