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Condursal Z1100

Discussion in 'Heat Treating' started by Griff, Nov 2, 2020.

  1. Griff

    Griff Active Member

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    I know there’s been a couple of posts on this stuff. Below is a video by Craig Lockwood of Chop knives. Seems he’s had some issues with it on his first batch sticking to the blade.

    @dancom I know you use this stuff, any insight into why this happened?

    I think a few guys use this successfully and use some kind of acid to scrub the blades after quenching and before temper, might be a different coating though.

  2. dancom

    dancom Dust Maker Legend Member

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    My guess is that he's putting it in the oven at too low a temperature. Recommended range between 600°C and 1100°C. There is a special note about the product behaving like a heat-proof lacquer leaving black spots on the workpiece if the temperature is too low.

    In saying that, I don't quite get his logic. Did he think he could heat treat a finished blade? The blade he's doing the heat treat on doesn't have the bevels ground yet. I certainly wouldn't be heat treating a 10 thousandths edge.

    No magic bullets gents. There is always going to be some cleanup after heat treatment.

    I mentioned before that different steels have different results. This is AEB-L after plate quench. Some steel wool and this is pretty cleaned up. [​IMG]

    Last edited: Nov 2, 2020
  3. John Noon

    John Noon Well-Known Member

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    If the Condursal sees any temperature below 600C the product will flash off (burn) leaving you with an unprotected blade.
    This can happen surprisingly easily when quenching multiple blades one after the other, I had a few handles damaged by the air exchange when opening the door. Created an interesting pattern on the handles.

    He did not have the depth of coating needed, spray application or brush and you are looking for a consistent darker green color.

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