{"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":"selectarea-materialului-rotilor-macaralei-suspendate","status":"publish","type":"post","link":"https:\/\/www.hnhlcranes.com\/ro\/selectarea-materialului-rotilor-macaralei-suspendate\/","title":{"rendered":"Selec\u021bia materialelor pentru ro\u021bile macaralelor suspendate"},"content":{"rendered":"

Materialul ro\u021bii macaralei suspendate este de obicei selectat \u00een func\u021bie de mediul de utilizare (sarcin\u0103, frecven\u021b\u0103, uzur\u0103). Urm\u0103toarele sunt c\u00e2teva materiale principale utilizate \u00een mod obi\u0219nuit \u00een industrie \u0219i caracteristicile acestora:<\/p>\n

1. ZG430-640 (o\u021bel turnat)\"\"<\/a> \"\"<\/a><\/strong><\/h3>\n

\u00cen conformitate cu standardul chinez GB\/T 11352-2009<\/strong> (Carbon Structural Cast Steel), ZG430-640 este unul dintre cele mai frecvent utilizate materiale pentru ro\u021bile macaralei.<\/p>\n

    \n
  • \n

    Acesta ofer\u0103 o rezisten\u021b\u0103 la trac\u021biune de \u2265 640 MPa<\/strong>, a limit\u0103 de curgere \u2265 430 MPa<\/strong>, \u0219i o alungirea \u2265 14%<\/strong>.<\/p>\n<\/li>\n

  • \n

    \u00cen plus, ofer\u0103 o rezisten\u021b\u0103 excelent\u0103 la impact \u0219i propriet\u0103\u021bi mecanice generale.<\/p>\n<\/li>\n

  • \n

    Prin urmare, inginerii aleg de obicei acest material pentru podurile rulante de dimensiuni medii \u0219i mari datorit\u0103 performan\u021bei echilibrate \u0219i rentabilit\u0103\u021bii sale.<\/p>\n<\/li>\n<\/ul>\n

    2. 42CrMo (o\u021bel aliat)<\/strong><\/h3>\n

    \u00cen conformitate cu GB\/T 3077<\/strong>, 42CrMo este un o\u021bel aliat de \u00eenalt\u0103 performan\u021b\u0103 utilizat pe scar\u0103 larg\u0103 \u00een aplica\u021bii grele.<\/p>\n

      \n
    • \n

      Dup\u0103 c\u0103lire \u0219i revenire, acesta atinge o rezisten\u021b\u0103 la trac\u021biune de \u2265 980 MPa<\/strong> \u0219i o limit\u0103 de curgere \u2265 850 MPa<\/strong>, cu rezisten\u021b\u0103 ridicat\u0103 la oboseal\u0103 \u0219i tenacitate.<\/p>\n<\/li>\n

    • \n

      Ca urmare, produc\u0103torii aleg adesea 42CrMo pentru ro\u021bi motoare<\/strong> sau aplica\u021bii care necesit\u0103 porniri\/opriri frecvente<\/strong> \u0219i sarcini dinamice ridicate<\/strong>.<\/p>\n<\/li>\n<\/ul>\n

      3. 65Mn (o\u021bel de prim\u0103var\u0103 cu con\u021binut ridicat de mangan)<\/strong><\/h3>\n

      \u00cen conformitate cu GB\/T 1222<\/strong>, 65Mn este un tip de o\u021bel carbon-mangan pentru arcuri care ofer\u0103 rezisten\u021b\u0103 excelent\u0103 la uzur\u0103<\/strong> \u0219i duritate ridicat\u0103 (HRC 45-55)<\/strong>.<\/p>\n

        \n
      • \n

        De\u0219i duritatea sa este u\u0219or mai sc\u0103zut\u0103, se comport\u0103 bine \u00een uzur\u0103 ridicat\u0103, impact redus<\/strong> medii de lucru.<\/p>\n<\/li>\n

      • \n

        Prin urmare, companiile \u00eel aplic\u0103 adesea la componente precum ro\u021bile transportoare sau ro\u021bile de rulare.<\/p>\n<\/li>\n<\/ul>\n

        4. QT500-7 \/ QT600-3 (font\u0103 ductil\u0103)<\/strong><\/h3>\n

        Astfel cum sunt definite \u00een GB\/T 1348<\/strong>, font\u0103 ductil\u0103, cum ar fi QT500-7 sau QT600-3, ofer\u0103 o rezisten\u021b\u0103 la trac\u021biune de 500-600 MPa<\/strong> \u0219i un rata de elonga\u021bie a 7-10%<\/strong>.<\/p>\n

          \n
        • \n

          Acest material este eficiente din punct de vedere al costurilor<\/strong> \u0219i u\u0219or de procesat<\/strong>, de\u0219i rezisten\u021ba sa la uzur\u0103 este mai sc\u0103zut\u0103 dec\u00e2t cea a o\u021belului.<\/p>\n<\/li>\n

        • \n

          Prin urmare, inginerii \u00eel utilizeaz\u0103 de obicei pentru macarale u\u0219oare<\/strong> sau ro\u021bi neimpulsionate<\/strong> \u00een cazul \u00een care costul este o preocupare principal\u0103.<\/p>\n<\/li>\n<\/ul>\n

          Roata macaralei Metode op\u021bionale de tratament termic:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Tratament termic<\/th>\nScop<\/th>\nMateriale adecvate<\/th>\n<\/tr>\n<\/thead>\n
          Normalizare + Revenire<\/td>\nPentru a \u00eembun\u0103t\u0103\u021bi performan\u021bele mecanice generale<\/td>\nZG430-640<\/td>\n<\/tr>\n
          C\u0103lire + Revenire<\/td>\nPentru a cre\u0219te rezisten\u021ba \u0219i rezisten\u021ba la oboseal\u0103<\/td>\n42CrMo, 65Mn<\/td>\n<\/tr>\n
          \u00cent\u0103rirea suprafe\u021bei<\/td>\nPentru a \u00eembun\u0103t\u0103\u021bi rezisten\u021ba la uzur\u0103 a suprafe\u021bei<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n
          Induc\u021bie de \u00eent\u0103rire<\/td>\nAdesea utilizate pentru ro\u021bile motoare (\u00eent\u0103rire localizat\u0103)<\/td>\nZG430, 42CrMo<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

          Selectarea recomandat\u0103 a materialelor \u00een func\u021bie de condi\u021biile de lucru:<\/strong><\/h3>\n
          \n
          \n\n\n\n\n\n\n\n\n
          Condi\u021bii de munc\u0103<\/th>\nMaterial recomandat<\/th>\n<\/tr>\n<\/thead>\n
          Sarcin\u0103 medie, macara multifunc\u021bional\u0103<\/td>\nZG430-640<\/td>\n<\/tr>\n
          Sarcin\u0103 mare, func\u021bionare frecvent\u0103<\/td>\n42CrMo<\/td>\n<\/tr>\n
          Uzur\u0103 ridicat\u0103, impact redus<\/td>\n65Mn<\/td>\n<\/tr>\n
          Echipamente u\u0219oare, sensibile la costuri<\/td>\nQT500-7 (font\u0103 ductil\u0103)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

          Materialul ro\u021bii macaralei suspendate este de obicei selectat \u00een func\u021bie de mediul de utilizare (sarcin\u0103, frecven\u021b\u0103, uzur\u0103). Urm\u0103toarele...<\/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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