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  1. 07-18-2012, 03:02 AM #1
    baldy
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    Default Heat Treat Prep

    I have a couple of File Razors that are nearly ready for heat treat.
    ATM they are hand sanded to 180 grit. What grit would you guys recommend sanding them to before they go in?
    Thanks
    Grant
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  2. 07-18-2012, 03:10 AM #2
    spazola
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    180 is good, I useually sand to about 80 grit pre-heat-treat. and break all of the edges with and corners with a bit finer paper 150 grit.

    Charlie
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  4. 07-18-2012, 07:39 AM #3
    Adam G.
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    Hi Grant,
    +1 on Charlie's recommendation - especially breaking the corners and edges a little. No sharp angles.
    Also the grits between the USA and Aus are usually different scales. Doing carbon steel in oil, 180 is good. If i do high alloy i am sending to a heat treater with a vacuum system i go to at least 800.
    Hope they come out great for you.
    Adam
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  6. 07-18-2012, 03:25 PM #4
    Maximilian
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    I take my hollow grind to 120 grit and the blade profile to at least 220 grit for carbon steel before HT.. Has always worked perfect for me.

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  8. 07-18-2012, 05:27 PM #5
    Mike Blue
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    +1 on trying to eliminate any sharp angles. All that steel moves around quite violently (and at the speed of sound strangely enough), any hard corner induces additional stress creating an opportunity for a crack.
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  10. 07-18-2012, 06:52 PM #6
    pixelfixed
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    Quote Originally Posted by Mike Blue View Post
    +1 on trying to eliminate any sharp angles. All that steel moves around quite violently (and at the speed of sound strangely enough), any hard corner induces additional stress creating an opportunity for a crack.
    Thats really interesting,can these movements be seen or measured? is it like a few thousands?
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