Duroxite® 300 Wire

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    General Product Description

    Duroxite® 300 Wire is a flux-cored welding wire for hardfacing components subject to extremely severe sliding wear applications using an open-arc or gas shielded arc welding processes. The weld deposit of Duroxite® 300 Wire consists of specially formulated abrasive materials employing a uniform glass-forming melt chemistry that allows high undercooling to be achieved. Duroxite® 300 weld overlay contains a unique high volume of ultra-fine tungsten-niobium-molybdenum-rich complex borocarbide phase with a grain size refined down to 500 nm. The borocarbides are completely wetted in a ductile matrix preventing premature pull-out delamination, crack nucleation and bridging. This results in a product with significantly improved service life that maintains high toughness in severe sliding wear applications.

    Duroxite® 300 Wire is suitable for single-layer or double-layer deposit with both stringer bead and oscillation bead. It naturally reveals stress-relief cracks after welding. Preheating, interpass temperature, and pose-weld heat treatment are as needed according to base metal recommendations. If welding fume generation is a concern, a gas shielded arc welding process is highly recommended. When welding, slightly drag angle is preferred for a better performance. If welding with downhill or uphill position, reduced wire feed speed and voltage are preferred to apply. Duroxite® 300 Wire is designed to weld on carbon steel or low alloy steel substrates experiencing severe wear for both dry and wet (slurry) abrasive environments at ambient or elevated temperatures up to 600°C (1100°F). Duroxite® 300 Wire is not compatible with austenitic alloys. Duroxite® 300 Wire is an excellent alternative hardfacing wire to tungsten carbide hardfacing wire.

    Key Benefits

    • Extreme wear resistance in dry and wet abrasive environments with a high degree of toughness.
    • Cost effective alternative to tungsten carbide wire with equivalent service life and better impact resistance.
    • Maintains a consistent wear resistance from surface down to 75% of the overlay.
    • Has uniform through-thickness hardness of 67 to 70 HRC for single and double-layer overlay.
    • Thinner thickness overlay applied compared to traditional chromium carbide overlay (CCO) or complex carbide overlay which result in a lighter weight product while increasing service life.

    Typical Applications

    Duroxite® 300 WIRE is mainly designed to use for hardfacing any steel substrates (not compatible with austenitic alloys) undergoing extremely severe wear in mining, power generation, cement, oil sand, steel production, waste handling, and pulp and paper industries. Typical examples include:

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      Mining Crusher rolls, Skip liners, Slurry pipes, Slurry pumps, Conveyor chains, Excavator bucket liners
      Cement Fan blades, Deflector blades, Cranker crushers
      Oil sands Surge bins, Feed chutes, Slurry pipes, Slurry pumps
      Steel Ore chutes
      Power Screw augers, Wear liner plates, Ash handling equipment liners
      Agriculture Grain shredding hammers, Sugar mill knives, Row crop sweeps
      Oil and Gas Fracking blender pumps
      Construction Snow plow shoes, Demolition tools
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        Mining
        Crusher rolls, Skip liners, Slurry pipes, Slurry pumps, Conveyor chains, Excavator bucket liners
        Cement
        Fan blades, Deflector blades, Cranker crushers
        Oil sands
        Surge bins, Feed chutes, Slurry pipes, Slurry pumps
        Steel
        Ore chutes
        Power
        Screw augers, Wear liner plates, Ash handling equipment liners
        Agriculture
        Grain shredding hammers, Sugar mill knives, Row crop sweeps
        Oil and Gas
        Fracking blender pumps
        Construction
        Snow plow shoes, Demolition tools

        Standard Dimensions

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          Standard diameter
          Metric
          1.6 mm
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            Standard diameter
            Metric
            1.6 mm

            Mechanical Properties

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              ASTM G65 – Procedure A weight loss 2)
              Typical weld metal surface hardness
              Number of overlay passes Surface
              (g max)
              75 % depth of overlay 3)
              (g max)
              Weld deposit on mild steel 1)
              (HRC)
              Single and double-layer 0.10 0.10 67 - 70
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                1) Surface hardness is measured on machined flat surface just below overlay surface.

                2) ASTM G65 - Procedure A weight loss, is a standard test measuring sliding abrasion resistance using a dry sand/rubber wheel apparatus. ASTM G65-Procedure A is the most severe test method.

                3) ASTM G65 - Procedure A weight loss, wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from the top surface through to the depth of 75% of the overlay.

                Test results for mechanical properties

                Test results for mechanical properties, deposit overlay chemical composition, surface hardness, and ASTM G65-A weight loss were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, substrate chemistry and working temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended applications.

                Chemical Composition

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                  Typical weld deposit chemical composition (wt. %)
                  C Mn Si Cr W B Mo Nb Al Fe
                  < 5.0 < 5.0 < 2.0 < 20.0 < 10.0 < 5.0 < 10.0 < 10.0 < 5.0 Balance
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                    Welding recommendations

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                      Welding conditions
                      Current type Shielding gas Welding positions
                      DCEP (Direct current electrode positive) Open arc (no shielding) Flat, horizontal, half up, half down
                      DCEP (Direct current electrode positive) 75% Ar / 25% CO2
                      98% Ar / 2% O2
                      Flat, horizontal, half up, half down
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                        Welding parameters recommendations

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                          Shielding Diameter Amperage (A) Voltage (V) Wire feed speed
                          ()
                          Stick-out
                          Open arc (no shielding) 1.6 mm0.06250 mm 220 24 - 25 7.0 m/min ( ) 25 mm
                          Gas shielded 1.6 mm0.06250 mm 220 24 - 25 7.0 m/min ( ) 20 mm
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                            Recovery: 90%

                            Delivery Conditions

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                              Standard package
                              Weight
                              Type Metric
                              Spool 15 kg
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                                Standard package
                                Type
                                Spool
                                Weight

                                Metric
                                15 kg

                                Fabrication and Other Recommendations

                                The welded overlay components can be processed by welding, cutting, forming and machining. Specific recommendations can be found in the Duroxite® Product brochure or by consulting your local technical support representative.

                                Safety precautions

                                When welding or cutting Duroxite® products, smoke is produced containing harmful fumes and gases that are chemically highly complex and difficult to easily classify. The major toxic component in the fumes and gases produced in the process is hexavalent chromium. The proper exhaust ventilation equipment and fume-extraction torches are recommended, as well as suitable protective clothing and respiratory protection for operators.