hpfiend Posted August 10, 2011 Report Share Posted August 10, 2011 Hey all- Making a custom hitch for a project car.... thinking about heat treating the receiver portion of the hitch so that the hole for the pin won't stretch? I am pretty sure this makes mild steel harder to cut and deform but am not sure how would apply to tension/vibration loads which is why I was just going to do the area around the hole. They do heat treat pins and hitch balls fwiw... I knew I was going to drill on it so I did not quench after welding. btw as far as my heat treat technique I am thinking about getting the area around the pin cherry red and then quenching it in a bucket of water. EDIT : after reading this http://www.millerwelds.com/resources/communities/mboard/archive/index.php/t-12879.html, I am double thinking my idea... can anyone offer any further guidance? Thanks! Andrew Quote Link to comment Share on other sites More sharing options...
ross Posted August 10, 2011 Report Share Posted August 10, 2011 Why not just weld a 3/8" plate on each side that also has a hole in it? Quote Link to comment Share on other sites More sharing options...
hpfiend Posted August 10, 2011 Author Report Share Posted August 10, 2011 thats a good idea- thanks! I could do that as well... I don't have any 3/8" but I do have 1/4" material... Quote Link to comment Share on other sites More sharing options...
ross Posted August 10, 2011 Report Share Posted August 10, 2011 That's probably your best bet. Heat treating the steel with a torch isn't just about heating and quenching. Different heat treatments use different quenching methods, multiple heatings in an oven to exact temps, adding carbon, quenching in salt water or oil. While heating you are adding carbon (from the acetylene) and not in an even manner. The wrong concentration of carbon can make the steel weak. Quote Link to comment Share on other sites More sharing options...
NTHER91 Posted August 11, 2011 Report Share Posted August 11, 2011 Was gonna say quench in oil if anything Not inside will flame up Quote Link to comment Share on other sites More sharing options...
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