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  1. 08-02-2016 #17
    Boyan Silyavski's Avatar
    Lives in Denia, Spain.
    Boyan Silyavski
    Last Activity: 15-04-2024 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,049. Received thanks 333 times, giving thanks to others 55 times. Made a monetary donation to the upkeep of the community.
    Quote Originally Posted by toomast View Post
    What do you mean by that?
    There is a way to treat low carb steel / mild steel/ . You heat it at 315C, keep it there a couple of minutes, thin oxide layer forms in black, then you brush it with some oil and it goes even blacker. Result is much tougher part, even if not a high carbon steel. Black oxide layer is not real anti rust though it gives some protection


    bellow you could compare bare cold drawn steel bar and treated.


    Click image for larger version.  Name: cold drawn steel.jpg  Views: 561  Size: 304.5 KB  ID: 17546
    project 1 , 2, Dust Shoe ...
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