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Tungsten carbide high resistance alloy overlay wear-resistant welding rod
  • Tungsten carbide high resistance alloy overlay wear-resistant welding rod

    • Application: Used for surfacing welding of mechanical parts resistant to strong rock wear, such as brickyards (reazzles, stirrups, rolls, coal crushing, hammerheads), cement plants (living trays, crusher plates)
    • Using tungsten carbide and low-hydrogen sodium type coating as the main raw materials, it can be used for both AC and DC
    • It can weld all carbon steel base material wear surface. The welding layer has ultra-high hardness and resistance to external impact, has the effect of bearing the strong friction of silt and stone
    • The weld layer has the characteristics of high hardness, good toughness, high temperature resistance and wear resistance, and is suitable for surfacing welding of carbon steel, alloy steel, cast iron, cast steel and so on.
    • 1. Before welding need to pay attention to: before welding the welded parts need to remove rust, oil and other impurities. If the impact of strong welded parts need to be warmed and insulated.
      2. How to avoid burnout: try to use short arc small current welding to avoid the burnout of alloying elements.
      3. can be multi-layer overlay welding: overlay metal alloy content is very high, can be multi-layer overlay welding, general overlay welding 1-3 layers.
      4. improve its impact resistance: multi-layer overlay welding, while hot can be a one-time welding, preferably while hot into the lime powder insulation, its wear resistance remains unchanged, can improve its impact resistance:.
      6. How to avoid the phenomenon of shedding: If the future re-cladding welding, can be welded first in the position of grinding the original weld layer, and gradually weld the welded parts at once is better, so as to avoid the original remaining weld layer due to rapid heating and rapid cooling and shedding phenomenon.
      6. how to avoid the emergence of porosity: such as welding rod moisture, the weld layer will be localized porosity, so that the welding rod can be dried a little, 500 ℃ above 1-2 hours to use is better."                                


    • 1. preheating: preheating before welding, control of interlayer temperature, slow cooling after welding.
      2. elimination: stress relief heat treatment after welding.
      3. low hydrogen: to avoid cracking during multi-layer overlay welding, using low-hydrogen overlay welding electrodes.
      4. transition: if necessary, the overlay layer and the base material between the overlay transition layer (with low carbon content, high toughness welding rod)

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