Sherardizing method and apparatus

Sherardizing method and apparatus

CN
  • CN 1,031,468 C
  • Filed: 10/13/1993
  • Issued: 04/03/1996
  • Est. Priority Date: 10/13/1993
  • Status: Active Grant
First Claim
Patent Images

1. The method of 1 one kinds of sherardizing is characterized in that this method comprises the steps:

  • (a) calculate according to the surface-area of plating piece and thickness of coating contain zinc 〉

    =95% (weight ratio), leaded<

    0.2% (weight ratio) granularity is a 0.075mm zinc powder amount,(b) measure the quartz sand amount that granularity is 0.15~

    0.30mm by 10~

    40% of plating piece weight,(c) plating piece, zinc powder, quartz sand are packed in the rotary drum (sealed vessel),(d) rotary drum is put in the process furnace heats, when temperature is raised to 350~

    450 ℃

    , stationary temperature keeps coming out of the stove after 40~

    150 minutes,(e) to the plating piece after coming out of the stove polish, Passivation Treatment.

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