{"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":"selecao-do-material-da-roda-da-ponte-rolante","status":"publish","type":"post","link":"https:\/\/www.hnhlcranes.com\/pt\/selecao-do-material-da-roda-da-ponte-rolante\/","title":{"rendered":"Sele\u00e7\u00e3o do material da roda da ponte rolante"},"content":{"rendered":"

O material da roda da ponte rolante \u00e9 normalmente selecionado de acordo com o ambiente de utiliza\u00e7\u00e3o (carga, frequ\u00eancia, desgaste). Seguem-se alguns dos principais materiais habitualmente utilizados na ind\u00fastria e as suas carater\u00edsticas:<\/p>\n

1. ZG430-640 (A\u00e7o fundido)\"\"<\/a> \"\"<\/a><\/strong><\/h3>\n

De acordo com a norma chinesa GB\/T 11352-2009<\/strong> (A\u00e7o fundido estrutural de carbono), ZG430-640 \u00e9 um dos materiais mais utilizados para rodas de grua.<\/p>\n

    \n
  • \n

    Fornece um resist\u00eancia \u00e0 tra\u00e7\u00e3o de \u2265 640 MPa<\/strong>, a limite de elasticidade de \u2265 430 MPa<\/strong>e um alongamento do \u2265 14%<\/strong>.<\/p>\n<\/li>\n

  • \n

    Al\u00e9m disso, oferece uma excelente resist\u00eancia ao impacto e propriedades mec\u00e2nicas gerais.<\/p>\n<\/li>\n

  • \n

    Por conseguinte, os engenheiros escolhem normalmente este material para pontes rolantes de m\u00e9dia e grande dimens\u00e3o devido ao seu desempenho equilibrado e \u00e0 sua rela\u00e7\u00e3o custo-efic\u00e1cia.<\/p>\n<\/li>\n<\/ul>\n

    2. 42CrMo (A\u00e7o de liga)<\/strong><\/h3>\n

    De acordo com GB\/T 3077<\/strong>O 42CrMo \u00e9 uma liga de a\u00e7o de alto desempenho amplamente utilizada em aplica\u00e7\u00f5es pesadas.<\/p>\n

      \n
    • \n

      Ap\u00f3s a t\u00eampera e o revenido, atinge uma resist\u00eancia \u00e0 tra\u00e7\u00e3o de \u2265 980 MPa<\/strong> e um limite de elasticidade de \u2265 850 MPa<\/strong>com elevada resist\u00eancia \u00e0 fadiga e tenacidade.<\/p>\n<\/li>\n

    • \n

      Como resultado, os fabricantes selecionam frequentemente o 42CrMo para rodas motrizes<\/strong> ou aplica\u00e7\u00f5es que requerem arranques\/paragens frequentes<\/strong> e cargas din\u00e2micas elevadas<\/strong>.<\/p>\n<\/li>\n<\/ul>\n

      3. 65Mn (A\u00e7o para molas com elevado teor de mangan\u00eas)<\/strong><\/h3>\n

      Em conformidade com GB\/T 1222<\/strong>O 65Mn \u00e9 um tipo de a\u00e7o para molas com carbono e mangan\u00eas que oferece excelente resist\u00eancia ao desgaste<\/strong> e elevada dureza (HRC 45-55)<\/strong>.<\/p>\n

        \n
      • \n

        Embora a sua resist\u00eancia seja ligeiramente inferior, tem um bom desempenho em alto desgaste, baixo impacto<\/strong> ambientes de trabalho.<\/p>\n<\/li>\n

      • \n

        Por conseguinte, as empresas aplicam-no frequentemente a componentes como rodas de transportadores ou polias.<\/p>\n<\/li>\n<\/ul>\n

        4. QT500-7 \/ QT600-3 (ferro fundido d\u00factil)<\/strong><\/h3>\n

        Tal como definido em GB\/T 1348<\/strong>O ferro fundido d\u00factil, como o QT500-7 ou o QT600-3, proporciona uma resist\u00eancia \u00e0 tra\u00e7\u00e3o de 500-600 MPa<\/strong> e um taxa de alongamento do 7-10%<\/strong>.<\/p>\n

          \n
        • \n

          Este material \u00e9 rent\u00e1vel<\/strong> e f\u00e1cil de processar<\/strong>embora a sua resist\u00eancia ao desgaste seja inferior \u00e0 do a\u00e7o.<\/p>\n<\/li>\n

        • \n

          Por conseguinte, os engenheiros utilizam-no normalmente para gruas ligeiras<\/strong> ou rodas n\u00e3o motrizes<\/strong> quando o custo \u00e9 uma preocupa\u00e7\u00e3o fundamental.<\/p>\n<\/li>\n<\/ul>\n

          Roda de ponte rolante M\u00e9todos de tratamento t\u00e9rmico opcionais:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Tratamento t\u00e9rmico<\/th>\nObjetivo<\/th>\nMateriais adequados<\/th>\n<\/tr>\n<\/thead>\n
          Normaliza\u00e7\u00e3o + T\u00eampera<\/td>\nPara melhorar o desempenho mec\u00e2nico global<\/td>\nZG430-640<\/td>\n<\/tr>\n
          T\u00eampera + Revenido<\/td>\nPara aumentar a for\u00e7a e a resist\u00eancia \u00e0 fadiga<\/td>\n42CrMo, 65Mn<\/td>\n<\/tr>\n
          Endurecimento de superf\u00edcies<\/td>\nPara melhorar a resist\u00eancia ao desgaste da superf\u00edcie<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n
          Endurecimento por indu\u00e7\u00e3o<\/td>\nFrequentemente utilizado para rodas motrizes (endurecimento localizado)<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

          Sele\u00e7\u00e3o recomendada de materiais com base nas condi\u00e7\u00f5es de trabalho:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Condi\u00e7\u00f5es de trabalho<\/th>\nMaterial recomendado<\/th>\n<\/tr>\n<\/thead>\n
          Grua de carga m\u00e9dia para fins gerais<\/td>\nZG430-640<\/td>\n<\/tr>\n
          Carga pesada, funcionamento frequente<\/td>\n42CrMo<\/td>\n<\/tr>\n
          Alto desgaste, baixo impacto<\/td>\n65Mn<\/td>\n<\/tr>\n
          Equipamento ligeiro, sens\u00edvel aos custos<\/td>\nQT500-7 (ferro fundido d\u00factil)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

          O material da roda da ponte rolante \u00e9 normalmente selecionado de acordo com o ambiente de utiliza\u00e7\u00e3o (carga, frequ\u00eancia, desgaste). O seguinte...<\/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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