{"id":1803,"date":"2025-07-22T23:39:22","date_gmt":"2025-07-23T02:39:22","guid":{"rendered":"https:\/\/cuarepoti.com.ar\/recomendaciones-de-aplicacion-de-varillas-y-electrodos-tubulares-para-recargue-duro-hardfacing\/"},"modified":"2025-07-25T17:59:56","modified_gmt":"2025-07-25T20:59:56","slug":"recomendaciones-de-aplicacion-de-varillas-y-electrodos-tubulares-para-recargue-duro-hardfacing","status":"publish","type":"page","link":"https:\/\/cuarepoti.com.ar\/en\/recomendaciones-de-aplicacion-de-varillas-y-electrodos-tubulares-para-recargue-duro-hardfacing\/","title":{"rendered":"Recomendaciones de aplicaci\u00f3n de varillas y electrodos tubulares para recargue duro – hardfacing"},"content":{"rendered":"\t\t
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Application Recommendations for Tubular Rods and Electrodes \u2013 Hardfacing\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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AgroTec \/ AgroTec – E<\/strong>
ELECTRIC ARC \u2013 SMAW Process<\/strong><\/p>

  • Remove rust, dirt, grease, oil, and other contaminants from the surface to be protected.<\/p><\/li>

  • Previous hardfacing deposits must be removed using a wire brush, sandblaster, grinder, etc.
    If it\u2019s not possible to completely remove old deposits, apply a buttering or rebuilding layer before hardfacing.<\/p><\/li><\/ul>

    Preheating Guidelines:<\/strong><\/p>

    • Manganese steels:<\/strong> Never exceed 260\u202f\u00b0C<\/p><\/li>

    • Cast iron:<\/strong> Preheat up to 450\u202f\u00b0C and maintain temperature throughout the process<\/p><\/li>

    • Low-alloy steels:<\/strong> Preheat to 150\u2013250\u202f\u00b0C<\/p><\/li><\/ul>

      Preheating prevents detachment, cracks in the weld metal or base metal, and hydrogen-induced porosity.
      Maintain recommended temperatures during the hardfacing process, including interpass temperature.
      Allow the part to cool slowly to reduce residual stress.
      Insulate the part using dry sand, vermiculite, or dry lime.
      Cracks that may appear do not affect<\/strong> product performance.<\/p>

      Dilution<\/strong><\/p>

      Excessive penetration or dilution reduces hardness, hardfacing efficiency, and may cause cracking or embrittlement.<\/p>

      To reduce dilution:<\/strong><\/p>

      • Avoid excessive current\/amperage<\/p><\/li>

      • Aim the arc at the weld pool instead of the base metal<\/p><\/li>

      • Use low amperage and a \u201cpush\u201d technique to control the pool<\/p><\/li>

      • Overlap beads by 50% to 75%<\/p><\/li>

      • Preheat to recommended temperatures<\/p><\/li>

      • Avoid overly thick deposits\u2014they do not improve wear resistance and may crack or break off quickly<\/p><\/li><\/ul>

        Deformation<\/strong><\/p>

        Heat from the process can deform the part and affect its functionality.
        Use clamping methods and welding procedures that prevent deformation.
        Preheat slowly and evenly.<\/p>

        Recommended Parameters<\/strong><\/p>

        • Amperage:<\/strong>
          150\u2013160 A for 5 mm rods
          120\u2013150 A for 3.5 mm rods
          (Adjust within range based on welder\u2019s comfort: speed, dilution, bead width, etc.)
          Too low: sticking \/ no arc. Too high: overheats rod.<\/p><\/li>

        • Power source:<\/strong> Use a machine with over 400 A capacity, regulated to the above values for better arc start and continuity.<\/p><\/li>

        • Voltage:<\/strong> No specific requirement. Experience ranges from 25\u201335 V. Adjust according to welder preference, part mass, work conditions, etc.<\/p><\/li>

        • Current type:<\/strong> DC, Electrode Positive (+)<\/p><\/li>

        • Base metal:<\/strong> Best results on SAE 1010<\/p><\/li>

        • Bead technique:<\/strong>
          When bead size allows, use circular motion (try clockwise or counterclockwise depending on ground clamp position for best result)<\/p><\/li>

        • Electrode angle:<\/strong> Hold the electrode at 75\u00b0\u201390\u00b0 to the base metal<\/p><\/li>

        • Rod preheating:<\/strong> Preheat rods for at least one hour at 100\u202f\u00b0C<\/p><\/li>

        • Rod handling:<\/strong> Hold rod 15\u201320 cm from the tip to avoid overheating<\/p><\/li>

        • Hardness:<\/strong> Maximum hardness achieved with two passes<\/p><\/li><\/ul>

          IMPORTANT: SAFETY NOTICE<\/strong><\/p>

          Fumes generated from normal use of these products may contain trace amounts of chromium, manganese, or tungsten<\/strong>.
          Always use in well-ventilated areas.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

          Application Recommendations for Tubular Rods and Electrodes \u2013 Hardfacing AgroTec \/ AgroTec – EELECTRIC ARC \u2013 SMAW Process Remove rust, dirt, grease, oil, and other contaminants from the surface to be protected. Previous hardfacing deposits must be removed using a wire brush, sandblaster, grinder, etc.If it\u2019s not possible to completely remove old deposits, apply a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1803","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/pages\/1803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/comments?post=1803"}],"version-history":[{"count":3,"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/pages\/1803\/revisions"}],"predecessor-version":[{"id":1810,"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/pages\/1803\/revisions\/1810"}],"wp:attachment":[{"href":"https:\/\/cuarepoti.com.ar\/en\/wp-json\/wp\/v2\/media?parent=1803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}