Return to MENU

Hardfacing Questions

     What is the hardfaced piece of equipment supposed to do?

•    What industry is the part from?
•    If a material is to be processed, what is the material – sand, dirt, stone, rock, food, other?
•    Is it a new part, to be hardfaced before it is put into service or an old part, already worn?

    What is the wear problem - abrasion, impact, heat, friction (metal-to-metal), or cavitation?

•    Which is the most important?
•    If metal-to-metal, which component is easiest to rebuild and hardface?

  What is the base metal composition - manganese, carbon, low alloy steel, stainless or cast iron?

•    What welding procedures are recommended for this base metal?
      
Preheat?
  
   Slow cooling?
•    What is the base metal thickness?

     What is the condition of the base metal?

•    Is the base metal clean?
•    Are cracks, holes, eroded areas, or work-hardened metal present?
•    Is any old hardfacing left on the surface?
•    Is buildup welding needed before hardfacing?
•    Will the part be hardfaced over and over again?

     What are the specifics about the welding application?

•    In what position will the welding be done?
•    What sequence should be followed?
•    What pattern should be used?
•    Will an edge be hardfaced?

    What welding process should be used?  What process is available?

•    Oxyacetylene?
•    Stick electrode?
•    TIG?
•    Wire feed welding - Gas-shielded or Open-arc?
•    Powder Spray?

•    Will the welding be done in-doors or outside?
•    What equipment is needed?
•    What is the size of the customer’s power source?
•    What welding electrode or wire diameter is needed?
•    What is needed in the way of welding skill?

     Must the deposit meet hardness or other specifications?

•    Are there thickness limitations?
•    Is stress-relief cracking in the hardfacing deposit a problem?
•    Is machining required after welding?
•    Will the part be heat-treated after welding?
•    Will the part be flame-cut later on?
•    Is appearance important?

    In order to determine how much is needed, what are the dimensions of the area to be hardfaced?

    What type of Customer?

•    End User – maintenance
•    OEM
•    Job or Weld Shop, outside contractor
•    Replacement Parts Supplier

    Is the customer satisfied with the current life expectancy of the part?

•    What product, if any, is the customer currently using?
•    What product has been used in the past?