{"id":8304,"date":"2025-04-12T15:33:41","date_gmt":"2025-04-12T07:33:41","guid":{"rendered":"https:\/\/www.hnhlcranes.com\/?p=8304"},"modified":"2025-04-12T15:40:37","modified_gmt":"2025-04-12T07:40:37","slug":"kraana-rataste-materjali-valik","status":"publish","type":"post","link":"https:\/\/www.hnhlcranes.com\/et\/kraana-rataste-materjali-valik\/","title":{"rendered":"Kraana rataste materjali valik"},"content":{"rendered":"

Kraanaratta materjal valitakse tavaliselt vastavalt kasutuskeskkonnale (koormus, sagedus, kulumine). J\u00e4rgnevalt on esitatud mitu t\u00f6\u00f6stuses tavaliselt kasutatavat peamist materjali ja nende omadused:<\/p>\n

1. ZG430-640 (valatud teras)\"\"<\/a> \"\"<\/a><\/strong><\/h3>\n

Hiina standardi kohaselt GB\/T 11352-2009<\/strong> (Carbon Structural Cast Steel), ZG430-640 on \u00fcks k\u00f5ige sagedamini kasutatavatest materjalidest kraanarattadeks.<\/p>\n

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  • \n

    See annab t\u00f5mbetugevus \u2265 640 MPa<\/strong>, a voolavuspiir \u2265 430 MPa<\/strong>ja \u2265 14% pikenemine<\/strong>.<\/p>\n<\/li>\n

  • \n

    Lisaks sellele pakub see suurep\u00e4rast l\u00f6\u00f6gikindlust ja \u00fcldisi mehaanilisi omadusi.<\/p>\n<\/li>\n

  • \n

    Seet\u00f5ttu valivad insenerid tavaliselt selle materjali keskmise ja suure haakekraana jaoks selle tasakaalustatud j\u00f5udluse ja kuluefektiivsuse t\u00f5ttu.<\/p>\n<\/li>\n<\/ul>\n

    2. 42CrMo (legeeritud teras)<\/strong><\/h3>\n

    Vastavalt GB\/T 3077<\/strong>, 42CrMo on k\u00f5rgtehnoloogiline legeeritud teras, mida kasutatakse laialdaselt raskeveokites.<\/p>\n

      \n
    • \n

      P\u00e4rast jahutamist ja karastamist saavutab see j\u00e4rgmise taseme t\u00f5mbetugevus \u2265 980 MPa<\/strong> ja voolavuspiir \u2265 850 MPa<\/strong>, k\u00f5rge v\u00e4simuskindlus ja sitkus.<\/p>\n<\/li>\n

    • \n

      Selle tulemusena valivad tootjad sageli 42CrMo jaoks veorattad<\/strong> v\u00f5i rakendused, mis n\u00f5uavad sagedased stardid\/peatused<\/strong> ja suured d\u00fcnaamilised koormused<\/strong>.<\/p>\n<\/li>\n<\/ul>\n

      3. 65Mn (k\u00f5rge mangaanisisaldusega vedrusteras)<\/strong><\/h3>\n

      Koosk\u00f5las GB\/T 1222<\/strong>, 65Mn on teatud t\u00fc\u00fcpi s\u00fcsinik-mangaanist vedrusteras, mis pakub suurep\u00e4rane kulumiskindlus<\/strong> ja k\u00f5rge k\u00f5vadus (HRC 45-55)<\/strong>.<\/p>\n

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      • \n

        Kuigi selle sitkus on veidi v\u00e4iksem, toimib see h\u00e4sti k\u00f5rge kulumisastmega, v\u00e4hese koormusega<\/strong> t\u00f6\u00f6keskkonnad.<\/p>\n<\/li>\n

      • \n

        Sellest tulenevalt kasutavad ettev\u00f5tted seda sageli selliste komponentide nagu konveierirattad v\u00f5i t\u00fchik\u00e4igukettad puhul.<\/p>\n<\/li>\n<\/ul>\n

        4. QT500-7 \/ QT600-3 (duktiilne malm)<\/strong><\/h3>\n

        Nagu on m\u00e4\u00e4ratletud dokumendis GB\/T 1348<\/strong>, duktiivne raud nagu QT500-7 v\u00f5i QT600-3 annab t\u00f5mbetugevus 500-600 MPa<\/strong> ja 7-10% pikenemiskiirus<\/strong>.<\/p>\n

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        • \n

          See materjal on kuluefektiivne<\/strong> ja lihtne t\u00f6\u00f6delda<\/strong>, kuigi selle kulumiskindlus on madalam kui terasest.<\/p>\n<\/li>\n

        • \n

          Seet\u00f5ttu kasutavad insenerid seda tavaliselt kergekaalulised kraanad<\/strong> v\u00f5i mittek\u00e4itatavad rattad<\/strong> kus kulud on esmat\u00e4htis.<\/p>\n<\/li>\n<\/ul>\n

          Valikulised kuumt\u00f6\u00f6tlemismeetodid:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Kuumt\u00f6\u00f6tlus<\/th>\nEesm\u00e4rk<\/th>\nSobivad materjalid<\/th>\n<\/tr>\n<\/thead>\n
          Normaliseerimine + karastamine<\/td>\n\u00dcldise mehaanilise j\u00f5udluse suurendamiseks<\/td>\nZG430-640<\/td>\n<\/tr>\n
          Kustutamine + karastamine<\/td>\nTugevuse ja v\u00e4simuskindluse suurendamiseks<\/td>\n42CrMo, 65Mn<\/td>\n<\/tr>\n
          Pinna karastamine<\/td>\nPinna kulumiskindluse parandamiseks<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n
          Induktsioonk\u00f5venemine<\/td>\nKasutatakse sageli veorataste puhul (lokaliseeritud karastamine).<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

          Soovitatav materjalivalik vastavalt t\u00f6\u00f6tingimustele:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          T\u00f6\u00f6tingimused<\/th>\nSoovitatav materjal<\/th>\n<\/tr>\n<\/thead>\n
          Keskmise koormusega \u00fcldotstarbeline kraana<\/td>\nZG430-640<\/td>\n<\/tr>\n
          Raske koormus, sagedane t\u00f6\u00f6<\/td>\n42CrMo<\/td>\n<\/tr>\n
          Suur kulumine, v\u00e4hene m\u00f5ju<\/td>\n65Mn<\/td>\n<\/tr>\n
          Kergetehnilised seadmed, kulutundlikud<\/td>\nQT500-7 (duktiilne raud)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

          Kraanaratta materjal valitakse tavaliselt vastavalt kasutuskeskkonnale (koormus, sagedus, kulumine). J\u00e4rgmised...<\/p>","protected":false},"author":1,"featured_media":6720,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[1,53],"tags":[759,764,753,643,757,765,762,761,763,758,752],"class_list":["post-8304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-company_news","category-industry_news","tag-active-wheel-set","tag-angle-box-type-wheel-sets","tag-bridge-crane-wheel","tag-crane-accessories","tag-crane-wheel","tag-crane-wheel-assembly","tag-crane-wheels-manufacturer","tag-driven-wheel-group","tag-drs-wheel-blocks","tag-forged-wheels","tag-overhead-crane-wheel"],"yoast_head":"\nOverhead 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