Even the small amount of carbides the would produce when hardened has little bearing on the piece functioning as an axle. If you don't know the condition the steel is in now, I would normalize it. You can't go wrong doing this. You'll end up with and axle that will flex a little without breaking, because you have produced a ductile grain structure in the steel Heat the piece to fh[none magnetic] let cool in still air.
It only needs to get under a thousand degrees to change structures then back up to none magnetic and let it cool again. Have a good one, FRed. You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. All Activity Home Blacksmithing Heat Treating, general discussion heat treating cold rolled mild steel heat treating cold rolled mild steel.
Share More sharing options Followers 1. Reply to this topic Start new topic. Prev 1 2 Next Page 1 of 2. Recommended Posts. Posted September 25, Link to comment Share on other sites More sharing options HWooldridge Posted September 26, Posted September 26, Sam Falzone Posted September 26, Mike BR Posted September 27, Posted September 27, Quenchcrack Posted September 27, Posted October 14, ThomasPowers Posted October 14, Posted December 8, Posted January 11, Steve Sells Posted January 11, Posted January 11, edited.
Edited January 11, by steve sells typo. I'm finding out that blacksmithing is not just hammering iron,but i'm learning. Frosty Posted January 11, Ten Hammers Posted January 11, Tenn Clif Posted January 11, I'm still learning the trade also, what do you mean by normalizing the metal?
Takes a few seconds but you need the equipment. If you harden it straight though it will crack due to brittleness with any severe use. You are talking about hardening a pivot pin for a backhoe. Why do you guys have such a problem just answering his question? Safety is most definitely a huge concern but he asked how to harden the steel not get a safety class.
I am sure he is very aware of the safety issues. If you just do not know the answer such as me, simply read the post and continue on but do not start an OSHA class. Main point of the question was how can I harden the pins. Hi Andy. Janie's question was answered immediately by Jason, and later received 4 more technical replies.
It's all good. Andy, I guess some people feel obligated to provide information that will help lower the potential of someone dying.
Criticizing someone's questionable decision making isn't a bad thing If someone is doing something boneheaded that could lead to someone else's injury then they should be called out on it quickly, and then be shown the right way to do it.
Have you evaluated the parts for carbon content at the surface? This could help determine if the hardness your seeing is due to carburizing being ineffective or slack quenching. Regarding the hardness scale, I assume your measuring micro-Vickers on a cross section. This has been properly polished, right?
What weight are you using, we typically use g but I've also used g for indentations close to a surface. Red Flag This Post Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
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Login to Your Account. Remember Me? Register Forgot password? What's New? Likes: 0. Results 1 to 7 of 7. Thread: Case hardening or Thread Tools Show Printable Version. I've "read up" on doing some case hardening the "right way", but I'd like to ask some more experienced hands on here about a good standard procedure. Depth maybe. Also, please let me know of pitfalls easily encountered and how to avoid them.
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