Surface treatment method for sucker rod coupling

Surface treatment method for sucker rod coupling

  • CN 101,570,861 A
  • Filed: 06/02/2009
  • Published: 11/04/2009
  • Est. Priority Date: 06/02/2009
  • Status: Active Application
First Claim
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1. , the surface treatment method of sucker-rod coupling, it is characterized in that, may further comprise the steps:

  • 1, the sucker-rod coupling that mechanical workout is finished places temperature to quench after 870~

    920 ℃

    heat treatment furnace is incubated 1~

    2 hour and is cooled to room temperature to water, and then in heat treatment furnace in 550~

    650 ℃

    of insulations air cooling after 2~

    3 hours, guarantee that hardness is in HRC30~


    2,, remove the oxide skin and the corrosion on surface with heat treated sucker-rod coupling surface sandblast in the solid sandblast machine;

    3, hypersonic flame spraying sucker-rod coupling surface, with ratio equalization, NiCrBSiMo powdery granule more than granularity 200 orders with 10 * 10 6

    20 * 10 6The striking energy of joule is sprayed on heat treated sucker-rod coupling surface, and coat-thickness is not more than 0.5 millimeter;

    4, will spray good sucker-rod coupling and be installed on the engine lathe speed rotation with 600~

    800 rev/mins, simultaneously with acetylene burner with instantaneous temperature 2500-3500 ℃

    of local heavy molten sprayed coating NiCrBSiMo0.5-2 second;

    5, sucker-rod coupling is carried out the solid sandblasting once more, in being the pickle solution of 2-4, pH value soaks 5-10min then, after rinsing well with tap water, the blackout pond liquid of putting into pH value again and be 2.5-3.5 soaks 10-12min, wash with tap water once more, last natural air drying, oiling obtains that the rete crystallization is careful, color and luster is even, and outward appearance is the sucker-rod coupling of black.

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