HEY METE/work hardening ?'s again

Joined
Jan 22, 2002
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658
Mete,
Sorry to hit you up for another off topic post, but I'm having quite a time with a metal problem. At work, the machine I run processes used glass bottles, and readies them for new manufacture. Considering the hardness of glass, and the ammount processed, the machine is constantly being consumed. In some spots there are already patches, on patches. My employers do not wish to spend much money on expensive steel, or treatments, that will take the abrasion levels. This situation got me wondering about the concept of "work hardening." My question to you would be, is the movement of glass on steel enough to trigger this response? Also, would the material harden itself enough to protect itself? Offhand, I don't know the relative prices of the various steels involved. If 301 would work in this application, it should work out fine. There wouldn't be any difficulty in welding, or fabrication. And I wouldn't think that there would be a huge problem in the cost involved in shielding a few areas. Sorry to bug you about an off topic situation like this. In other words, thanks for being handy:)
 
Truck, it's never off topic for me if it's about metals. That application sounds like pure abrasion, nothing there to cause work hardening.There are sheet steels especially made for that application, coal chutes etc. I would assume that it was made from that.But even then things will wear out.You would then have to replace or repair.I don't know the details of your machine but things like bulldozer blades and loader buckets are reinforced or repaired with welding rod that is made to provide very high abrasion resistance.
 
Mete,
Thanks for the quick reply! Yes, you are right in that it is mainly an abrasive action. Unfortunately, it is all mild steel. Any spots that have a significant ammount of impact only accentuate the wear. The glass is merciless! I helped replace a coal handling system several years ago, actually made a liner with a 300 series stainless. From what I understand, that has worked beautifully, coal is relatively soft. That system was approximately 40 years old when repaired. This glass crusher is only 2-3 years old. I wonder when it will suddenly collapse from structural dissapearance :D The machine itself, is 3 stories tall, plus accesories, so running a few beads of hardfacing isn't going to be practical. My bottom line interest in this whole situation is that if I lose even 1% of this material, leakage and spillage, I have 5,000 lbs of glass to account for, often with a shovel. On a bad night I don't even want to guess how many tons I clean up. At present, I'm trying to figure out if I can engineer some sacrificial pieces into the goofy thing without altering flow, or volume. Oh well, at least I have plenty of exercise, and lots to think about in the meantime.
 
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