{"id":6348,"date":"2025-02-28T14:39:01","date_gmt":"2025-02-28T06:39:01","guid":{"rendered":"http:\/\/weierte.jyjl.cn\/?p=6348"},"modified":"2026-01-21T16:24:49","modified_gmt":"2026-01-21T08:24:49","slug":"large-size-magnesia-crucible","status":"publish","type":"post","link":"https:\/\/weiert-ceramics.com\/nl\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/","title":{"rendered":"Magnesia-kroezen voor inductiesmelten"},"content":{"rendered":"
\n
\"High-temperature<\/figure>\n<\/div>\n\n\n

De uitdaging van zuurstofafgifte door MgO-kroezen bij inductiesmelten<\/strong><\/h4>\n\n\n\n

Bij de productie van nikkelgebaseerde superlegeringen is vacu\u00fcm-inductiesmelten (VIM) een cruciaal proces. Een vaak onderschatte uitdaging is echter dat de MgO-kroes zelf kan fungeren als een onbedoelde zuurstofbron.<\/p>\n\n\n\n

<\/div>\n\n\n\n

Fenomeen van zuurstoftoevoer<\/strong><\/h4>\n\n\n\n

Eerdere studies (e.g., Wu Chaowan 1964) gaven aan dat tijdens vacu\u00fcm-inductiesmelten (VIM) van zuiver ijzer de kroeswand zuurstof aan de smelt kan afgeven, waardoor het zuurstofgehalte van het metaal na een initi\u00eble reductie opnieuw toeneemt.\nRecent onderzoek (Li et al., 2024) bevestigt dat zelfs hoogzuivere MgO-kroezen onder hoge vacu\u00fcm- en hoge temperatuuromstandigheden een lichte ontleding kunnen ondergaan (MgO(s) \u21cc Mg(g) + \u00bd O\u2082(g)).<\/p>\n\n\n\n

<\/div>\n\n\n\n

Invloed op de gietkwaliteit<\/strong><\/h4>\n\n\n\n
    \n
  • In smelten van zuiver nikkel daalt het zuurstofgehalte aanvankelijk, maar neemt daarna weer toe;<\/li>\n\n\n\n
  • In nikkelgebaseerde legeringen kan een verhoogd zuurstofgehalte leiden tot Al\u2082O\u2083-inclusies, wat de kruipweerstand en treksterkte vermindert;<\/li>\n\n\n\n
  • Deze inclusies verslechteren de langetermijnprestaties en betrouwbaarheid van de legering.<\/li>\n<\/ul>\n\n\n\n
    <\/div>\n\n\n\n

    Technische controlestrategie van Weiert Ceramics<\/strong><\/h4>\n\n\n\n
      \n
    • Gebruik van ultrazuivere MgO-grondstoffen (\u226599,7 %) om interne zuurstofbronnen te minimaliseren;<\/li>\n\n\n\n
    • Strikte vacu\u00fcmcontrole en handhaving van de smelttemperatuur rond 1.550 \u00b0C.<\/li>\n<\/ul>\n\n\n\n
      <\/div>\n\n\n\n

      Verificatie en resultaten<\/strong><\/h4>\n\n\n\n

      In vergelijkende tests verlaagden de aangepaste kroezen van Weiert Ceramics het zuurstofgehalte van de smelt van circa 3,2 \u00d7 10\u207b\u2076 tot ongeveer 1,4 \u00d7 10\u207b\u2076, waarbij de zuurstoftoevoer met ongeveer 60 % werd verminderd.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      Samenvatting<\/strong><\/h4>\n\n\n\n

      Zuurstoftoevoer vanuit kroezen vormt een verborgen bron van contaminatie. Door het gebruik van hoogzuivere materialen en beschermende coatings biedt Weiert Ceramics geavanceerde kroesoplossingen die een verbeterde legeringszuiverheid en procesherhaalbaarheid mogelijk maken.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      Referenties\uff1a<\/strong><\/p>\n\n\n\n

        \n
      • Wu Chaowan, Studies on MgO Crucible in Vacuum Induction Furnace for Pure Iron Melting<\/em>, Acta Metallurgica Sinica, 1964.<\/li>\n\n\n\n
      • Li Xu-Ze et al., Deoxidation of Nickel-Based Superalloy Using Carbon under High Vacuum Considering MgO-Crucible Decomposition<\/em>, Metallurgical & Materials Transactions B, 2024.<\/li>\n\n\n\n
      • Yan Jing, Vacuum Induction Melting of BY-Series Deformation Nickel-Based Superalloy: Loss Mechanisms of MgO Crucibles<\/em>, Journal of Large-Scale Forgings & Presses, 2024.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

        Oxygen Supply Challenge of MgO Crucibles in Induction Melting In nickel-based superalloy production, the vacuum induction melting (VIM) process is critical. Yet one often under-appreciated challenge is that the MgO crucible itself can act as an inadvertent oxygen source. The phenomenon of oxygen supply Earlier studies (e.g., Wu Chaowan 1964) indicated that during VIM of […]<\/p>\n","protected":false},"author":1,"featured_media":6341,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[170],"tags":[],"class_list":["post-6348","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-magnesia-crucible-mgo"],"acf":[],"yoast_head":"\nMagnesia Crucibles for Induction Melting - Weiert Ceramics Technology Co., Ltd.<\/title>\n<meta name=\"description\" content=\"Discover the critical issues surrounding high purity Magnesia crucibles in nickel superalloy production and their effects on performance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weiert-ceramics.com\/nl\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magnesia Crucibles for Induction Melting\" \/>\n<meta property=\"og:description\" content=\"Discover the critical issues surrounding high purity Magnesia crucibles in nickel superalloy production and their effects on performance.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/weiert-ceramics.com\/nl\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\" \/>\n<meta property=\"og:site_name\" content=\"Weiert Ceramics Technology Co., Ltd.\" \/>\n<meta property=\"article:published_time\" content=\"2025-02-28T06:39:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-21T08:24:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/weiert-ceramics.com\/wp-content\/uploads\/2025\/02\/a87ff679a2f3e71d9181-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Geschreven door\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Verwachte leestijd\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/weiert-ceramics.com\/ja\/#\/schema\/person\/68a9501854712f995cf9cead4b2a7721\"},\"headline\":\"Magnesia Crucibles for Induction Melting\",\"datePublished\":\"2025-02-28T06:39:01+00:00\",\"dateModified\":\"2026-01-21T08:24:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\"},\"wordCount\":290,\"publisher\":{\"@id\":\"https:\/\/weiert-ceramics.com\/ja\/#organization\"},\"image\":{\"@id\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/weiert-ceramics.com\/wp-content\/uploads\/2025\/02\/a87ff679a2f3e71d9181-1.jpg\",\"articleSection\":[\"Magnesia Crucible MgO\"],\"inLanguage\":\"nl-NL\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\",\"url\":\"https:\/\/weiert-ceramics.com\/products\/ceramic-crucibles\/magnesia-crucible-mgo\/large-size-magnesia-crucible\/\",\"name\":\"Magnesia Crucibles for Induction Melting - 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