{"id":8615,"date":"2017-03-16T15:13:48","date_gmt":"2017-03-16T15:13:48","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/"},"modified":"2023-02-07T04:49:04","modified_gmt":"2023-02-07T04:49:04","slug":"one-minute-mentor-nitriding-in-fluidized-bed-reactors-at-low-temperatures","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/one-minute-mentor-nitriding-in-fluidized-bed-reactors-at-low-temperatures\/","title":{"rendered":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures"},"content":{"rendered":"<p>\n\tIn nitriding treatment furnaces, the heating is done electrically, and the fluidizing gas composition is chosen to provide the optimum chemistry for the desired surface treatment (usually a mixture of NH<sub>3<\/sub>&nbsp;+ N<sub>2<\/sub>, with CH<sub>4<\/sub>&nbsp;added when nitrocarburizing is desired). The granular solid is considered inert and does not react with the part being treated but is fundamental in establishing the fluidized bed and its outstanding properties.<\/p>\n<p>\n\tFor stainless steel nitriding, treatment temperature must be kept below 840\u00b0F to prevent the precipitation of chromium nitride. The lower treatment temperature increases the efficiency of the Cr<sub>2<\/sub>O<sub>3<\/sub>&nbsp;barrier against nitriding; even after the acid treatment, there is still some oxide layer left at the steel surface.<\/p>\n<p>\n\tThe result is lower diffusion rates and lower nitriding potential (less dissociation of NH<sub>3<\/sub>, which is the mean supplier of atomic nitrogen needed for the nitriding treatment), as shown in the graph. The NH<sub>3<\/sub>&nbsp;dissociation effect is controlled by changing the composition of the atmosphere, but the oxide layer would dissociate or become permeable only at much higher temperatures, which would cause the precipitation of nitrides and carbides in the case.<\/p>\n<p>\n\tVolume 4D, <em>Heat Treating of Irons and Steels<\/em>&nbsp;? Heat Treated High-Alloy Steels ?&nbsp;Nitriding of Stainless Steels ?&nbsp;Thermochemical Nitriding Treatments<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In nitriding treatment furnaces, the heating is done electrically, and the fluidizing gas composition is chosen to provide the optimum chemistry for the desired surface treatment (usually a mixture of NH3 + N2, with CH4 added when nitrocarburizing is desired).<\/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":[439,440,441,492,1],"tags":[],"class_list":["post-8615","post","type-post","status-publish","format-standard","hentry","category-general","category-news","category-news-articles","category-nitriding-and-nitrocarburizing","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society<\/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:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society\" \/>\n<meta property=\"og:description\" content=\"In nitriding treatment furnaces, the heating is done electrically, and the fluidizing gas composition is chosen to provide the optimum chemistry for the desired surface treatment (usually a mixture of NH3 + N2, with CH4 added when nitrocarburizing is desired).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/\" \/>\n<meta property=\"og:site_name\" content=\"Heat Treating Society\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-16T15:13:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T04:49:04+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/\"},\"author\":{\"name\":\"\",\"@id\":\"\"},\"headline\":\"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures\",\"datePublished\":\"2017-03-16T15:13:48+00:00\",\"dateModified\":\"2023-02-07T04:49:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/\"},\"wordCount\":221,\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"articleSection\":[\"general\",\"news\",\"News Articles\",\"Nitriding and Nitrocarburizing\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/\",\"name\":\"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#website\"},\"datePublished\":\"2017-03-16T15:13:48+00:00\",\"dateModified\":\"2023-02-07T04:49:04+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/27255606\\\/NEWS\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#website\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\",\"name\":\"Heat Treating Society\",\"description\":\"Heat Treating Society ASM International\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\",\"name\":\"Heat Treating Society\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/cdn-prd-main.asm-media.cloud\\\/uploads\\\/sites\\\/85\\\/2022\\\/06\\\/layout_set_logo.png\",\"contentUrl\":\"https:\\\/\\\/cdn-prd-main.asm-media.cloud\\\/uploads\\\/sites\\\/85\\\/2022\\\/06\\\/layout_set_logo.png\",\"width\":286,\"height\":95,\"caption\":\"Heat Treating Society\"},\"image\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/","og_locale":"en_US","og_type":"article","og_title":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society","og_description":"In nitriding treatment furnaces, the heating is done electrically, and the fluidizing gas composition is chosen to provide the optimum chemistry for the desired surface treatment (usually a mixture of NH3 + N2, with CH4 added when nitrocarburizing is desired).","og_url":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/","og_site_name":"Heat Treating Society","article_published_time":"2017-03-16T15:13:48+00:00","article_modified_time":"2023-02-07T04:49:04+00:00","twitter_card":"summary_large_image","twitter_misc":{"Written by":"","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/#article","isPartOf":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/"},"author":{"name":"","@id":""},"headline":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures","datePublished":"2017-03-16T15:13:48+00:00","dateModified":"2023-02-07T04:49:04+00:00","mainEntityOfPage":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/"},"wordCount":221,"publisher":{"@id":"https:\/\/www.asminternational.org\/hts\/#organization"},"articleSection":["general","news","News Articles","Nitriding and Nitrocarburizing"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/","url":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/","name":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures - Heat Treating Society","isPartOf":{"@id":"https:\/\/www.asminternational.org\/hts\/#website"},"datePublished":"2017-03-16T15:13:48+00:00","dateModified":"2023-02-07T04:49:04+00:00","breadcrumb":{"@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/27255606\/NEWS\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.asminternational.org\/hts\/"},{"@type":"ListItem","position":2,"name":"One Minute Mentor: Nitriding in Fluidized-Bed Reactors at Low Temperatures"}]},{"@type":"WebSite","@id":"https:\/\/www.asminternational.org\/hts\/#website","url":"https:\/\/www.asminternational.org\/hts\/","name":"Heat Treating Society","description":"Heat Treating Society ASM International","publisher":{"@id":"https:\/\/www.asminternational.org\/hts\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.asminternational.org\/hts\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.asminternational.org\/hts\/#organization","name":"Heat Treating Society","url":"https:\/\/www.asminternational.org\/hts\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.asminternational.org\/hts\/#\/schema\/logo\/image\/","url":"https:\/\/cdn-prd-main.asm-media.cloud\/uploads\/sites\/85\/2022\/06\/layout_set_logo.png","contentUrl":"https:\/\/cdn-prd-main.asm-media.cloud\/uploads\/sites\/85\/2022\/06\/layout_set_logo.png","width":286,"height":95,"caption":"Heat Treating Society"},"image":{"@id":"https:\/\/www.asminternational.org\/hts\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":""}]}},"acf":[],"_links":{"self":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts\/8615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/users\/63082"}],"replies":[{"embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/comments?post=8615"}],"version-history":[{"count":0,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/posts\/8615\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/media?parent=8615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/categories?post=8615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.asminternational.org\/hts\/wp-json\/wp\/v2\/tags?post=8615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}